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Melting furnaces are industrial furnaces used for melting and holding temperature. Depending on the application and the requirements for quality, service and performance, there are melting furnaces available with different designs, mechanisms and technologies used. They are used for aluminium, magnesium, brass, zinc, tin and lead alloys. Furnaces vary in design, melting performance and capacity. All of them are energy saving, have optimized flue gas evacuation and low loss of material due to calcines.
Basically, there are two different types of heating: electric or fuel. Resistance heating furnaces have high flexibility. The advantage of fuel-heated furnaces is higher melting performance and higher furnace capacity. Selection of the heating type is determined by energy carriers available on-site and flue gas evacuation.
Melting furnaces and holding furnaces with electric heating
With metal heating cables, you can achieve temperatures up to 1300°C, and with special materials even up to 1800°C. Resistance heating furnaces are used as melting furnaces, and are especially good as holding furnaces. Electric melting and holding furnaces are perfect for processing aluminium, magnesium and zinc alloys in all common casting methods, such as pressure die-casting, vacuum casting, die-casting and sand casting. Foundry material temperature can be precisely controlled with microprocessor control. Even if fuel-fired melting furnaces achieve higher melting performance, electric heating is always the first choice for optimal energy efficiency.
Melting furnaces and holding furnaces with gas and oil heating
Fuel-heated melting furnaces are perfect for first melting and are the preferred solution for loading casting machines with liquid material, or are used in non-ferrous metal melting facilities. Selecting the right furnace depends on the batch material, alloy, desired melting performance and temperature, as well as the operating mode. Consider also such aspects as reliability, ease of use, as well as operating and maintenance costs. Users who go for optimal energy use and the highest quality, should opt for fuel-heated melting furnaces with burners and heat recovery.
Shaft melting furnaces – used melting furnaces for aluminium
Users with high requirements in terms of metal quality, melting performance and efficiency (e.g. aluminium foundries, pressure die-casting foundries), use shaft melting furnaces. These furnaces have special geometry of the shaft with a dedicated burner technology. All stages of the process, such as preheating, heating and fluidization, are combined in a single melting shaft. Cold meltable material is placed at the top of the shaft, then it gets heated as it moves down the shaft. A shaft furnace uses the countercurrent principle, which is thermally favourable, since the heat is extracted from the rising flue gas while melting.
Used melting furnaces specialist
Fiss offers used melting furnaces and holding furnaces, heated electrically, with gas or with oil. We have over 30 years of experience in purchase and sale of used foundry equipment. We provide professional support in selecting the right furnace, strictly following the client's needs. Our skilled engineers and technicians provide excellent comprehensive services, from machine disassembly and repair through logistics, assembly and training in a new location.