Small Induction Furnace for Iron/Steel/Copper/Brass ... - SuperbMelt

25 Aug.,2025

 

Small Induction Furnace for Iron/Steel/Copper/Brass ... - SuperbMelt

Both metal smelting and melting require constant supply of energy. While there are machines out there that could generate enough heat energy, they have flows. These drawbacks make them not reliable enough to be used where quality is desired.

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At SuperbMelt, we do have many induction furnaces for sale, and that can make your melting and smelting dreams come true. We suggest that you read this piece in its entirety so that you learn how to use the small induction furnace. At the end of the main piece, we have included the steps you could use to get one.

There are different types of metals: ferrous and non-ferrous metals. They are used in different ways to make products. However, before that is done, they need to be melted. There are different reasons why metals need to be casted. We have explained some of them below. Keep reading and we will also help you pick the best induction furnace for sale.

1.1, Metal Melting To Remove Impurities

Metals that occur in natural ores mostly have impurities. In the foundry industry, there needs to be attained some level of purity before these metals are used to make crucial products.

For instance, Gold might contain impurities such as copper. Though precious to some extent, copper should be removed from gold to make it pure and valuable. Therefore, Gold will be melted to remove copper and other impurities.

Note that melting metals to remove impurities in molten state can be done in quite a number of ways. However, we do recommend small metal induction furnace since it does have benefits compared to other machines.

Aluminum, copper, silver, and many other metals can also be meted with small metal induction furnace to get rid of impurities. It is important to note that a metal is considered as an impurity if it occurs in an ore in which it is not needed.

To get metal to a molten state, you want to ensure that the right amount of heat is induced into the metal. Depending what you are trying to heat, make sure that you have the right temperature induced so that you do not struggle to remove impurities.

1.2, Metal Melting To Make Alloy

The foundry industry is a vast one. It entails lots of metal-work intended to make unique items. Some of these products are used to enhance the functionality of parts of machine, while some are used to make jewelries.

The problem, however, is that when metal alloys are needed, it cannot be found occurring naturally, unless they are just impurities. Therefore, the only best ways to make metal alloys is by using heat energy.

Once metal has been gotten into its molten state, mixing it with other metals becomes easier. It is a way of enhancing the overall quality and non-ferrous metals, more so when a unique products needs to be made.

Metal melting to make alloys is something that has been there for ages. However, the difference is the machines used to attain the best results. Small metal induction furnace, for instance, is one of the best machines that can be used to get ant metal to its molten state for easier alloying.

This machine provides the best conditions that are required for all types of ferrous and non-ferrous metals. Kindly consider talking to us at SuperbMelt so that you learn more about how you can benefit from our products and or services.

1.3, Melting Metal For Industrial Casting

This is the largest industries in which metal melting happens most. Like aforementioned, industries need to ensure that they have the best machinery parts. Some of them also want to stand out from the competition.

All these have been made possible thanks to metal melting furnaces. SuperbMelt has one of the best designed furnaces to ensure that your industrial metal melting dreams come true.

To get the best metal alloy for industrial casting reasons, you want to have the best quality of both metals. Whether you are looking for an aluminum-copper alloy, you need to start by making them pure, which can also be done through melting.

Once you are done removing impurities from your metals, you can heat them together by inducing the right levels of energy, As a reminder, you need to supply the right levels of energy so that you get a perfectly amalgamated product.

If you feel green on this, you can always get in touch with us. Let us keep learning more about small metal induction furnace.

Metals are melted differently, depending on their physical and chemical properties. Let us look at some of them in this section. You will be using different types of melting furnaces to achieve your end results. Once you have found your most preferred induction furnace for sale, here is what you can use it for.

2.1, Precious Metal Melting Furnaces

There are several melting furnaces such as induction furnace, resistance furnace, and propane combustion. Even with that, you can do a lot more with induction furnace, and we have highlighted some of its benefits below. The tips can also help you find the best induction furnace for sale.

  • Less melting and smelting time
  • Does not consume a lot of energy
  • Comes in compact design for easy operation
  • Has a cooling system, hence can operate for 24 hours nonstop
  • Can induce high temperatures for melting all sorts of metals

If you are looking for a compact designed and industrial friendly induction furnace for sale, you can always get in touch with SuperbMelt.

2.2, Iron & Steel Melting Furnaces

Melting furnaces are ideal for subjecting hard metals under high heat energies. Most of them leverage thermal processing equipment to let the users alter the internal characteristics of metals. They do this by changing the temperatures carefully.

As for the metals, this process enhances the overall ductility when exposed to both strength and hardness. To do this, you will need to get an industrial furnace that is capable of inducing and keeping the temperatures below that of the melting point of the metal.

In the current time, almost only induction furnaces are used for melting steel and Iron. Due to its unique and easily applicable features, induction furnace is highly reliable. We have also highlighted its benefits in the initial parts of this piece. For recap, you will like the fact that it is easily affordable and convenient for both small scale and large scale melting needs.

Therefore, go ahead and get in touch with us for top-quality induction furnace for sale. Take a look at our website and learn how you can acquire and benefit from our high-end yet easily affordable products.

2.3, Copper Melting Furnaces

Just like steel & iron melting furnaces, you can get the right furnace to melt copper. The only challenge is that there are quite some of them, and making the right choice might be a huge challenge. Therefore, you need to ensure that you have the right items in place.

Currently, the best methods to melt copper include induction furnace, resistance furnace, centralized insulation melting furnace and many other furnaces. At SuperbMelt, we have always encouraged our clients to go for induction furnace for melting copper.

Induction furnace might not be the best device on the market, but it can meet all your copper melting and smelting needs in the most convenient way. For instance, if you have a large production firm, you will run your induction furnace for 24 hours nonstop. It has a cooling system that keeps it going for long hours.

2.4, Aluminum & Lead Melting Furnaces

Aluminum & Lead melting furnaces are available for both small scale and large scale melting purposes. They do have different features such as maximum heat and pressure generated, and the amount of electric energy consumed.

Depending on the scale of production, you ought to pick something that would work for you within the shortest time possible. But this should also depend on your budget as a company.
It is possible to use things such as resistance furnace, induction furnace, centralized induction furnace, and many more. The choices are many, but they do not work in the same way, more so in terms of quality.

In your case, you need to try induction furnace. We understand that you can still use other furnace, but what if you need something that would work much faster? Induction furnace will not even produce bad elements to the environment, which makes it safe for workplaces. Induction furnace will also take enough space to let you do many other things in the company.

We are a furnace manufacturing company, and you can always get the best quality from us. If you have been wondering which are the best machines, you can get from us? We have highlighted them below.

We believe that after going through this bit, you will not struggle to find the best metal melting furnace to invest in.

3.1, Mini 1-2kg Induction Furnace for Sale

SuperbMelt mini metal melting furnace (SPB-DH) is suitable for any of your small-scale production. It is capable of melting any metal piece whose weight falls in the range 1-2Kg.

This small metal melting machine can, in no time, reach a maximum temperature of ℃. These features also make this machine for melting other metals. Metals such as silver, copper, and aluminum, just to mention a few.

SuperbMelt mini metal melting furnace also finds application in jewellery recycling. It also very suitable for precious metal diggers in deals in collecting gold and its alloys.

The mini metal melting furnace takes a minimum of two minutes to melt a batch of two kilograms of any precious metal. This sums up to producing approximately 30kg of metal in an hour.

Also, this electric gold melting furnace can work for 24 hours, none stop. At the same providing you with excellent services and efficient metal melting process.

SuperbMelt electric small melting furnace uses the latest IGBT induction technology. This technology reduces your power consumption and improves your production efficiency. This mini gold melting machine speeds up your melting processes. This serves as it’s competitive over any other furnace in the market.

It comes with video tutorials and installation guide. This makes installation on other operations very simple and easy to go about. Make sure that you can in touch with credible dealers in induction furnace for sale.

SuperbMelt mini gold melting equipment is environment-friendly. It comes with the latest inbuilt green technology, which is now being employed in the precious metal industry. It does not produce harmful gas and fumes which are associated with other gold melting furnaces.

This mini furnace is designed very simple and easy to use. Compact and small-sized as compared with other furnaces that take a lot of space

SuperbMelt mini metal melting furnace (SPB-DH) is the first choice for the jewelry foundry, the gold recovery plant, and the gold miner.

3.2, Integrated 3-10 Kg Induction Furnace for Sale

The gold melting furnace is designed for melting 1g – 10kg metal. It is also suitable to melt other precious metals like silver, copper, palladium.

The induction metal melting furnace is based on the latest and most advanced IGBT induction technology. The top speedy melting could be realized within 2-4 minutes. The crucible is extractable by means of the matched tong.

Superb gold melting furnace is the better choice for lab, jewelry shop, research institute, and mining company comparing with gas melting device and resistance melting type.
We will make testing videos for each machine to ensure quality. Superbmelt also provides warranty of a full refund due to bad quality within one year.

Energy saving, Environmental protection, Low pollution level and light weight, Economic Space Occupation. It comes in a design that encourages easy installation.
Enhanced monitoring and diagnostics system of SPB-H series gold melting furnace, guarantee the machine of high stability, reliability and security.

Strict Supplier Management System and ISO :; CE Quality Management System guarantee high quality of each equipment. 100% duty cycle , 24hours continuous working ability at maximum power due to elaborate cooling system, unlike other furnaces.

This Superb gold melting furnace takes Use of solid-state IGBT inverter and power regulation, soft switch three resonance and frequency automatic tracking technology.
The top speedy melting rate can finish per batch within 3 mins nearly, which makes it ideal for large scale application.

3.3, 1-4kg Platinum Induction Furnace for Sale

SuperbMelt platinum melting furnace (SPB-B) is a totally ingenious technological creation which is designed with the aim of providing superior melting action on precious metals like platinum, gold, palladium or alloys of these metals.

This platinum smelting furnace can reach a temperature of about ℃ (It is about 900℃ higher than the platinum melting point.) in no time. This is suitable for melting metals (which may be in any form such as solid, dust, scrap, ingot or powder) weighing between 1kg and 4kg in a record time of less than 5 minutes.

SuperbMelt platinum melting furnace is your best bet if you run a scrap metal refinery business or an old jewelry refining plant. This furnace is just the machine you need to boost your production and overall efficiency.

Superbmelt platinum and gold melting equipment ensures the homogeneity of the melted or liquefied metal. This is achievable through the incorporation of a strong electromagnetic stirring system. This eliminates the inconvenience of having uneven surfaces especially in alloys.

An omni-bearing security alert readily warns the operator(s) when the system is being run under potentially harmful conditions. Conditions such as overheating, short-circuit, unduly high current or low water levels can easily be detected

For more information, please visit Zinc Melting Furnace.

You can be rest assured that personnel safety has not been compromised for efficiency in the design and development of this furnace.
SuperbMelt platinum melting equipment also comes with an inherent water pump. This strikes the need for additional pumps. Thereby saving you more money

The operation process is intuitive. An average furnace operator should not have any difficulty whatever in understanding and getting used to the working of the furnace.

SuperbMelt platinum melting furnace (SPB-B) is economical both in weight and volume. This makes it very easy to haul.
This product is compact and small sized. It will give more room for other equipment’s in your plant.

A combination of low noise operation, low carbon foot print and the durability of
working for 24 hours ensures that you can achieve your profit targets while still being environmentally responsible.

A total adherence to the supplier management system and the ISO CE quality standards makes this platinum melting furnace the best choice for your foundry or laboratory.

3.4, 20-30kg Manual Tilting Induction Furnace for Sale

SuperbMelt gold melting equipment (SPB-TB) can reach a maximum temperature of ℃ (the max temperature of tilting platinum smelter is ℃) with a power rating of 25kw. This provides an ultra-high heating effect capable of melting either 80kg of gold,silver (and similarly commensurate weights of other metals) within a period of 10-15 minutes.

SuperbMelt platinum and gold smelting equipment can heat your raw metals very fast. It speeds up your operations with the ultimate effect of increasing the profit margin. The gold melting machine is suitable for jewelry foundry and old jewelry refining plants.

Based on advanced IGBT induction technology, the gold smelting equipment is highly effective gold smelting solution. It has come to be trusted by operators and business owners alike over time due to its superior action which is.

Designed with convenience and efficiency as the core targets.
The tilting furnace design ensures that melted metals can easily be poured into the mold. This prevents spillage or splashing which reduces the risk of operator injuries from hot liquid metal splashes.

Another proof of the commitment to operator convenience is the use of a replaceable crucible for easy maintenance.
Also, a strong electromagnetic stirring system ensures homogeneity of the liquefied metal. This comes handy, especially for alloys.

The gold smelting furnace is also equipped with an omni-directional warning system. This alerts the operator when potentially harmful operating conditions are being approached.

Induction gold smelting kit is manufactured with the capability of operating at full capacity for 24 hours. This considerably lowers downtime except for scheduled maintenance.

The use of induction technology presents an advantage. Owing to the absence of electrodes and electric arcs, which can form deposits of impurities.

Finally, no combustion takes place thereby preventing the production of unsafe gases like oxides of carbon and nitrogen. The induction gold melting equipment has an edge over other forms of furnace. Resistance and gas furnace often gives off some gases that are unsafe for the environment.

3.5, 10-50 Kg Chain Tilting Induction Furnace for Sale

A small induction Furnace, capable of melting almost any metal of choice. SuperbMelt small induction furnace (SPB-MF) comes with a jaw-dropping power rating of 15kw ~90kw. It can conveniently accommodate three distinctive furnace bodies simultaneously without any hiccups.Therefore, you need to consider it when looking for the best induction furnace for sale

IGBT induction technology is capable of reducing power consumption by 15-30%. Compared the normal KGPS with higher power consumption rates; Saving you both money and energy.

SuperbMelt small tilting melting furnace is designed with a motor drive chain titling technology, which improves your work efficiency and easy pouring of metals. With this furnace, titling control becomes more flexible and also titling speeds can easily be adjusted.

You are guaranteed of a safer and precise control over your melting operations. This small tilting induction melting machine is also equipped with an omnidirectional warning system that triggers when there is system; over-voltage, over-current, over-heating, short circuit, water shortage, an improper frequency which may damage your equipment or pose serious explosion hazard to your workers.

Gone are the days when you waste so much time and energy in the bid to changing your furnace crucibles. Furnace crucible replacement is life made easy with this SuperbMelt small induction furnace (SPB-MF). It gives the flexibility to replace your crucible in no time, thereby saving you so much energy and time.

3.6, 10-100 Kg Motor Tilting Induction Furnace for Sale

This motor tilting induction metal melting furnace is designed for 10-80kg ferrous and non-ferrous metal melting based on induction technology.
SuperbMelt metal melting furnace is constructed for one-man pouring action. Its body is mounted onto a steel frame. By manual control, the furnace body can be set in any position when tilting.

According to ferrous melting or non-ferrous melting, the crucibles will be taken use of different materials. Graphite crucible is special for non ferrous metal like copper, gold, silver, aluminum. Silicon crucible is suitable for ferrous metal.

The small land occupied, fast melting and energy-saving are its obvious features. That is the cost performance choice for metal casting with small capacity.

Medium frequency metal melting furnace can be used for the melting of gold, silver, steel, stainless steel, brass, aluminium, lead, zinc and so on. Your search for induction furnace for sale will end as long as you secure this highly aggressive, reliable machine.

Comparing with SCR/KGPS technology, IGBT technology can save 15%-30% energy and is much more efficient than gas-fired and coal-fired method.
Small light, a lot of models can be selected to melt different amount of metals. Not only is it suitable for the factory, but also suitable for the college researching companies to use.

The crucible replacement is very easy for different metal material.The occupied land for the induction metal melting furnace is less than 1 square meter.

Modular design, ease of maintenance, no need to repair any special foundations, requires low operation cost, easily operable, produces no pollution and noise. 24 hours constant working will meet your long time melting. Contact SuperbMelt if you have been looking for highly reliable induction furnace for sale like this one.

3.7, 50-250 Kg Hydraulic Tilting Induction Furnace for Sale

SuperbMelt Electric Induction Furnace (SPB-HMF) comes from one of a leading induction furnace manufacturer in Asia. It is capable of melting any ferrous and non-ferrous metals such as gold, silver, copper, zinc, aluminium, steel and lead. Minimum and maximum weight requirement of 50Kg and 250kg respectively are considered suitable benefit from an output power rating of 45kw ~160kw.

The Electric Induction Furnace is incorporated with a Simens controls system (PLC). This gives accuracy, precision and better control to your melting process.

The electric induction melting furnace gives the flexibility to melt different kinds of metals with just a single furnace; a feature which saves you a lot of money.

This induction metal melting furnace is crucibles are quite convenient and super fast to replace. This also saves you energy and speeds up your melting process.

As compared with the regular KGPS furnace and electric arc furnace, the SuperbMelt IGBT technology reduces your power consumption by 15-30% at while working at optimum capacity.

It also comes with a hydraulic tilting design which can be controlled with the aid of a remote panel trolley. The control system ensures that you do not go overboard with any of your input and output parameters. This feature guarantees the safety of you and your staff.

The omni-directional warning system ensures that you do not experience any form of system malfunction. Malfunctions such as system over-voltage, over-current, over-heating, short circuit and water shortage can easily be eliminated.

The induction melting machine can be operated continuously for 24hours. No room for downtime with this product.

This product also comes with a magnet yoke. This yoke improves your melting efficiency, thereby saving you more energy. With all the features and benefits mentioned above you tend to save more money. You’ll achieve more stability with your operations. Your work efficiency will be greatly increased. In short, your operators’ safety is guaranteed.

Are you planning to invest in a melting furnace? You are in the right place. At SuperbMelt, we have inevitable deals for those looking for induction furnace for sale, depending on the factors you consider most while creating your budget.

4.1, Choose the Right Capacity

If you are looking to invest in a melting furnace, at least make sure that you pick the right capacity depending on the amount of metal you will be melting each time of application.

4.2, Pick The Right Furnace

You can choose among induction furnaces, resistance furnace, and a centralized holding furnace. However, if you are looking for quality and most pleasurable applications, then induction furnace is the best. It also works within a short duration, with a perfect cooling system. Find out if your preferred dealer has the best induction furnace for sale that will meet all your needs.

4.3, Important Factors to Consider When Picking The Best Metal Melting Furnace Efficiency

You need a melting furnace that would work seamlessly for the entire period of application.

Safety

Talking about safety, some furnaces get really hot and could explode due to a lack of elaborate cooling systems. These might not be the best machines to use for melting metals.

Easy Installation

These melting machines have parts. These parts can be easy or complicated, or they can be delicate or durable. It is advisable to pick one with parts that are easy to install, depending on the original design.

Technology

Machines come in different designs and enhancements to make work easier. However, there are still those that work better than the rest. A good example is the induction furnace from SuperbMelt.

Cost

Plan ahead and know the amount of money you are willing to spend on a new item. Note that in some cases, quality can be determined depending on the price of the machine you are buying. You should not spend an arm and leg trying to find the best induction furnace for sale.

Compatibility

If you intend to use a melting machine along with other applications, or you have a unique way of producing outputs, make sure to get a melting machine that matches your line of operation.

Environmentally Friendly

Noise and substance emission are some of the things that have negative impacts on the environment. You need a machine that operates silently and does not produce any substance into the environment.

Warranty

A good manufacturer is one that is confident in the quality of the products that they sell. Therefore, they need to provide a warranty to their customers, especially ones who are using the products for the first time.

Are you interested in learning more about SCR Melting Furnace? Contact us today to secure an expert consultation!

Method of preparing melts of zinc base alloys and improved flux ...

United: States Patent 3,512,959 METHOD OF PREPARING MELTS OFZINC BASE- ALLOYS AND IMPROVED FLUX THEREFOR William F. Joseph, Rocky River, and John F. Wallace, Cleveland, Ohio, assignors to Rossborough Supply Company, Cleveland, Ohio, a corporation of Ohio No Drawing. Filed Sept. 27, , Ser. No. 671,114 Int. Cl. CZZb 19/30, 19/32 U.S. Cl. 75-87 7 Claims ABSTRACT OF THE DISCLOSURE More eflicient recovery of usable metal is obtained without objectionable smoke and fumes, iron pick up or loss of magnesium from the. alloy by adding to the dross layer on the surface of a zinc base alloy bath a flux com: prising essentially 20 to 60 percent by weight of magnesium chloride (calculated as anhydrous) and at least 40 percent by weight total of sodium and potassium chlorides, the temperature to which the flux is heated being above the melting point of the flux. The sodium chloride may be present in amounts of 0 to 45 percent by weight and the potassium chloride may be present in amounts of 0 to 60 percent by weight although. a superior [flux results when sodium and potassium chlorides are each present in amounts of 20 to 40 percent of the total. When the zinc alloy contains aluminum, the improved flux preferably contains a small amount, up to 20 or 25%, of the total of said chlorides of an inorganic fluoride selected from sodium and potassium cryolites and silicofluorides and mixtures of one or more thereof. The present invention relates'to a method of fluxing, melting and maintaining zinc alloys in a form suitable for die casting or other melting of zinc and to an improved flux therefor. In the melting of zinc base alloys for die casting or other purposes, the metal is heated to a temperature of 780 F. or above, usually at 850 to F. During the melting operation, parts of the melted metal Within the dross on the bath surface are often prevented from coalescing with other parts 'because of the presence of oxides. The result is that a considerable amount of metal is trapped in the dross layer over the molten metal. This dross layer is made up primarily of uncoalesced molten particles of the alloy, zinc oxide and an iron-aluminum compound. In order to facilitate coalescing of major portions of the molten metal so that it is returned to the melt, it is customary to add to the dross layer on the surface of the metal during initial and subsequent meltings, substantial quantities of a flux. The fluxes used heretofore have facilitated coalescence of a major portion or most of the molten metal particles in the dross layer so that the metal is returned to the bath. The fluxes used heretofore and considered to be most eflicient contained large amounts of zinc chloride and ammonium chloride both in mechanical and chemical combination. The zinc chloride-ammonium chloride fluxes cause a strong exothermic reaction in the dross. layer and have been considered to do an excellent job of releasing entrapped metal in the dross layer. They produce a desirable dry, powdery dross. The strong exothermic reaction is, however, not desirable for it raises the temperature of the melt above that desired and makes melt temperature hard to control. Both the zinc chloride and the ammonium chloride cause a large amount of smoke (visible and highly objectionable vapors) to be evolved. These vapors are toxic, tend to cause illness, and constitute a health hazard. Authorities concerned with air pollu- Patented May 19, tion have objected to the discharge of such smoke into the atmosphere. Compliance with the smoke abatement requirements necessitates the installation and operation of exepensive equipment by companies using the prior fluxes. Zinc die casting alloys contain .02% to .08% of magnesium to increase tolerance of lead, cadmium and tin impurities, and about 4% of aluminum to yield eutectic type alloys. The reactions occurring when fluxes containing zinc chloride-ammonium chloride are used cause a loss of magnesium from the alloy. A decrease of the magnesium content results in the inter granular corrosion of the castings made of such alloy. To compensate for such loss it has been a practice to add some magnesium chloride to the flux. It is a prime object of the present invention to provide a flux which permits melting of zinc alloys without obnoxious smoke or highly toxic fumes. It is another object of the present invention to provide fluxes for zinc alloys which produce a finely powdered dross with a higher recovery of metal from such dross than has been obtainable with the prior art. It is still another object of the invention to provide more efficient fluxes for zinc 'base alloy baths that produce a powdery dross, increase the recovery of metal therefrom, produce no appreciable exothermic reaction when used, do not cause detrimental consumption or loss of magnesium from the zinc alloy bath, and reduce aluminum loss from the alloy because of the absence of said exothermic reaction. It is still another object. of this invention to provide a method of treating zinc base alloys during the melting, alloying or casting thereof, which method increases the proportion of usable metal over that before obtainable, provides a dross that is powdery and easily removed from the metal and does not cause objectionable smoke. It is another object of the present invention to provide a method of recovering more efiiciently usable metal from the skimming of zinc base alloy baths. Such skimmings being the dross layer which has been removed from the surface of a zinc alloy bath. These skimmings are treated separately with fluxes. We have found in accordance with the present invention that the above and other objects are obtained by treating the dross upon zinc base alloy baths, with a flux comprising essentially magnesium chloride and at least one chloride selected from sodium and potassium chlorides. Our new flux is preferably obtained by mixing certain proportions of magnesium chloride with both sodium chloride and potassium chloride and, preferably, in cases where aluminum is in the alloy, some inorganic ternary fluoride compound selected from one or more of cryolite (Na AlF potassium cryolite (K AlF sodium silicofluoride (Na SiF and potassium silicofluoride (K SiF The silicofluorides and cryolites can provide a mild exothermic reaction when the flux is added to the surface of a zinc alloy bath. Our new flux should have little if any ,zinc chloride and ammonium chloride as even a comparatively small amount of these causes smoking. However, up to 5% or so of each of these materials based on the total weight of MgCl KCl and NaCl present can be tolerated in many applications. The magnesium chloride (MgCl considered'asanhydrous, should constitute at least 20% by Weight of the 1 total of the magnesium, sodium and potassium chlorides. When more than 60% of MgCl is present, the dross becomes wet and is hard to manage. When the amount of magnesium chloride is less than 20%, the melting point of the flux becomes inordinately high. The preferred amount of magnesium chloride is 25% to 60% of the total of the magnesium, sodium and potassium chlorides in the flux. The optimum amount depends to some extent on the melting temperature or operational temperature of the melting unit. The exact function of the sodium and potassium chlorides is not fully understood, but they cooperate with the magnesium in some manner to produce the unique properties in the flux. When the total of these two materials is less than 40% of the total of the MgCl and alkali metal chlorides the dross becomes wet. We have found that to be elfective the flux must melt at or below the operating temperature of the zinc alloy bath. Operational fluxes include, therefore, those mixtures of magnesium chloride with potassium and/or with sodium chloride which melt at or below the operating temperature of the zinc alloy bath, which is usually from about 780 to F. The sodium chloride should constitute about to about 40% of the weight of the total of alkali chlorides and MgCl present, and about 20% to about 40% is preferred. The potassium chloride should be present in a maximum amount of 60% of the weight of the MgCl plus total alkali chlorides present. When at least 40% of these chlorides is made up of sodium, then the potassium chloride may be omitted and still a usable flux obtained, provided the operating temperature of the zinc alloy bath is above the melting point of the flux. Both sodium and potassium chlorides are preferably present, however, and the potassium chloride preferably should be present in amounts of about 19% to about 40% of the total of MgCl and alkali metal chlorides present. Our new fluxes when applied to the surface of a zinc alloy bath are not even mildly exothermic unless the aforesaid fluorides are present. The application of our fluxes to the surface of a zinc alloy bath serves to release a substantial portion of the free metallic zinc particles entrapped in the surface covering or dross. Subsequently the dross remaining becomes dry and powdery and is easily removed from the surface of the bath. It has been found that these skimmings have high heat insulating characteristics such that the remaining spheroids of molten Zinc which were not released when the flux was applied to the surface of the bath can be agglomerated and salvaged apart from the melting bath. By simple stirring of the skimmings, this free metal accumulates to such an extent that the metallic content thereof is de creased to about 0.5%, or even less. This compares with 0.8% for the best obtainable practice heretofore followed and with the 2% to 3% resulting in the use of ordinary practices. We have found no loss of aluminum and no pick up of iron in melts prepared and maintained when using our new fluxes. The magnesium chloride used need not be anhydrous if care in use of our new flux is practiced. The above percentages are, however, based on anhydrous MgCl Hydrated magnesium chloride (MgCl '6H O) is considerably less expensive to use than the anhydrous based on magnesium chloride content. When hydrated magnesium chloride is used the flux must be added gradually to the surface of the alloy bath to permit gradual vaporization of the water. One cannot plunge the flux into a molten bath. If such a procedure is used anhydrous MgCl should be used. We have found that the effectiveness of our new flux is increased greatly when it is stirred or worked in the dross on the surface of the molten metal. The following examples, in which percentages are by weight, illustrate the invention. EXAMPLE 1 Percent MgCl '6H O NaCl 27.3 KCl 27.4 K A1Fs or Na3AlF 3.0 The above ingredients are thoroughly mixed and packaged in a closed container. EXAMPLE 2 1,000 pounds of a zinc die casting alloy containing about 0.05% of magnesium and 4% of aluminum is placed in a ferrous melting pot of a melting furnace along with 1.8 to 2 pounds of the flux of Example 1. The alloy is heated to 850 F. The flux is worked or stirred into the dross on the surface of the molten metal to increase the effectiveness. No noticeable fumes or smoke is evolved and the dross becomes powdery. Upon removal from the furnace and subsequent stirring the metallic content thereof was found to be less than 0.5% of the weight thereof, and the magnesium and aluminum content of the melt remain unchanged. EXAMPLE 3 To the ingredients of Example 1 is added 10% (by weight of the original mixture) of Na SiF The resultant flux is somewhat superior to that of Example 1 when used in Example 2. The coalescence of the metal is faster. EXAMPLE 4 The flux of Example 3 is applied on the surface of a suitable zinc alloy melt, as described in Example 2.. The alloy is heated to a temperature of between 780 and 1,050 F. No visible fumes are evolved from the flux and the magnesium and aluminum content of the metal remain stable. EXAMPLE 5 Three separate fluxes based on MgCl -6H O were prepared by mixing together the ingredients shown in the following table: Flux (percent) A B o 42 38 3s 2s 26 26 2s 25 25 2 1 1 0 10 0 0 0 10 EXAMPLE 6 1,000 grams of skimmings, resulting from melting and skimming the dross from zinc die cast gates and sprues were melted in a graphite pot at F. To these molten skimmings were added 30 grams of Flux B above by slowly mixing the flux into the skimmings. A powdery dross was obtained and 935 grams of free metal alloy were recovered from the skimmings, representing a yield of 93.5%. EXAMPLE 7 The procedure of Example 6 Was repeated except that Flux C of Example 5 was substituted for Flux B. The fre metal alloy recovered was 92.8% of the weight of the skimming. EXAMPLE 8 The procedure of Example 6 was repeated except that Flux A of Example 5 was substituted for Flux B. 910 grams of free metal was recovered from the skimmings. EXAMPLE 9 To 150 pounds of skimmings from a melt of zinc die cast scrap was added 4 pounds of Flux A of Example 5. The mixture was also heated to F. in a graphite pot while stirring and working the flux into the molten skimmings. 135 pounds of free metal alloy were recov-: ered for a yield of based on the weight of the skimmmg. In making melts the new fluxes are generally used in amounts of about .15 to .25 of the weight of the zinc base alloys melted, although as little as .05% is effective andup to 1.0% or more may'be required. In recovering metal from the skimmings front zinc base alloys, tluxes in amounts of 1 to 5%, based on the weight of the skimniings, are usually used, although as little as 5% gives considerable recovery, and even or more may be used. About 2 to 4% is optimum from an economic standpoint. When the flux is mixed slowly or stirred into theskimmings, heat sufficient to melt the flux must be used and the temperature may vary from 780 F. to F. Usually the heating is in the presence of molten metal and about 780 F. to F. is then preferred, although higher temperatures. even 1 1, may he used. It is to he understood that in accordanccwith the provisions of the patent laws, various modifications can he made in the method, procedures, compositions and products of the present invention without departing from the spirit of the same. We claim: 1. A process of recovering usable metal from the skimmings resulting from melting zinc base alloys which comprises heating the said skimmings in intimate contact with a mixture of MgCl and at least one of the group consisting of NaCl and KCl, said MgCl being present in amounts of to 60 percent by weight and said group members being present in a total of at least 40 percent by weight, 0 to 40 percent of NaCl, and 0 to 60 percent of KCl being present, said heating being at a temperature at least equal to the melting. point of said mixture. 2. The process according to claim 1 wherein both NaCl and KO are presentin said mixture in amounts of 20 to 40 percent by weight I Y 3. The process according to claim 2 wherein 1 to (based on weight of said mixture) of an inorganic fluoride compound; selected from the group consisting of sodium and potassium 'cryolites, sodium and potassium silicofluorides and mixtures thereof, is also present in admixture with said mixture of MgC1 KCl and NaCl. 4. The process of claim 1 wherein said mixture is free from more than 5% by weight each of zinc and ammonium chlorides. 5. In a process of treating melts of a zinc base alloy wherein the metal is heated to a temperature of between 780 and F., the steps which comprise applying a flux comprising 20 to 60% by weight of magnesium chloride (calculated as anhydrous) and at least total of sodium and potassium chlorides, the sodium chloride being present in amounts of 0 to 40% and the potassium chloride'being present in amounts of 0 to any zinc chloride and ammonium chloride present being each less than 5% of the total of said magnesium, sodium and potassium chlorides to the surface of the molten metal, stirring the flux on the said surface and stirring the resultant powdery dross to agglomerate spheroids of molten metal and return them to the metal bath. 6. In a process of treating vmelts of a zinc base alloy wherein the metal is heated to a temperature of between 780" and " the steps which comprise applying a flux comprising a mixture of MgCl and at least one of r the group consisting of NaCl and KCI, said MgCl being present in amounts of 20 to 60 percent by weight and said group members being present in a total of at least 40 percent by weight, 0 to 40 percent of NaCl, and 0 to 60 percent of KCl being present to the surface of the bath; stirring the flux on said surface and stirring the resulting, powdery dross to agglomerate spheroids of molten metal and return them to the metal bath. 7. The process of claim 6 wherein the powdery dross is removed from the metallic bath and subsequently stirred to effect agglomerationof the metal spheroids contained therein. References Cited UNITED STATES PATENTS HENRY'W. TARRING 11, Primary Examiner US. Cl. X.R. -65, 93, 94