Refractory Materials Solutions for Aluminum Melting Furnaces

What are the types of refractory materials used in aluminum melting furnaces and the performance characteristics of each material? Aluminum melting furnaces are mainly divided into reverberatory furnaces, crucible furnaces, and induction furnaces. Refractory solutions for aluminum melting furnaces. However, China's aluminum processing industry has more widely used reverberatory furnaces, which have the advantages of large capacity, high thermal efficiency, and easy operation.

Solutions for Refractory Materials for Aluminium Melting Furnaces

What are the types of refractory materials used in aluminum melting furnaces and the performance characteristics of each material? When aluminum melting furnaces are used in construction, they usually use: corundum wear-resistant castables, lightweight insulation bricks, and dry anti-seepage materials. Most refractory materials used in boilers are made of corundum, silicon nitride, and silicon carbide. Aluminized reverberatory furnaces in contact with the molten aluminum furnace lining are usually made of high-alumina bricks. If higher-purity metallic aluminum is smelted, the alumina content of the high alumina bricks used is about 80-85%. Mullite bricks and corundum bricks will be chosen for masonry construction. However, some plants choose to consist of silicon carbide-bonded silicon carbide bricks in areas of erosion and wear, such as furnace hearths and used aluminum.

Types of Refractory Materials for Aluminium Melting Furnaces

The aluminum outlets of molten aluminum cans and aluminum melting furnaces are relatively heavy, and the aluminum melt is also relatively heavy. Therefore it is usually made of silicon carbonitride bricks freely bonded or bonded with silicon oxynitride, and is lined with zircon bricks in special cases. When aluminum outlets are being constructed, vacuum-cast refractory fiber cones will have better results. Linings that do not contact aluminum furnaces are usually made of clay bricks or refractory castables. Of course, to speed up melting and save energy, brick insulation or lightweight insulating cast products are also used in the construction of insulation.

What are the performance characteristics of the types of refractory materials used in aluminum melting furnaces? Speaking of aluminum melting furnaces using corundum wear-resistant castables, the main reason is that corundum wear-resistant castables are refractory materials with high aluminum content and high material purity. It has good wear resistance and good corrosion resistance. In addition, corundum wear-resistant castable has a high melting point, high fire resistance, and high thermal shock resistance, and is an indispensable refractory material in boiler construction. Lightweight insulation bricks for aluminum melting furnace structures include clay high alumina and lightweight silica bricks, depending on the material of the product.

What are the Refractory Castables Commonly Used in Aluminum Melting Furnace Construction?

The aluminum melting furnace is a piece of equipment used for melting and keeping aluminum ingots warm. It can well meet the aluminum smelting process. The furnace is composed of a melting furnace, a crucible, a heating element, a furnace cover lifting mechanism, and an electrical automatic temperature control system. The temperature of the aluminum melting furnace during the smelting process is actually not high. However, aluminum is very reactive after melting and is as pervasive as water. Therefore, this requires relatively high requirements for the refractory materials used in the construction process of aluminum melting furnaces.

If the appropriate refractory materials are used incorrectly during the casting process, it can easily lead to the gradual loosening and peeling of the refractory structure, thereby damaging the refractory lining. Moreover, aluminum and its alloys are easily susceptible to physical and chemical reactions with impurities in refractory materials, and the substances generated during the reaction will affect the quality of aluminum products. So what are the refractory castables commonly used in the construction of aluminum melting furnaces?

1. Non-stick Aluminum Castable

Non-stick aluminum castable. Its special design enables it to effectively prevent the penetration of molten aluminum during use and solve the problem of slag hanging and nodulation on the surface of the charge. Non-stick aluminum refractory castables, with their superior resistance to aluminum corrosion, can be used in aluminum melting furnace bottoms, lower furnace walls, slagging slopes, chutes, aluminum water ladles, and other severely corroded parts. After use, the corrosion and nodulation phenomena of aluminum liquid are controlled and delayed to a great extent.

2. Steel Fiber Castable

Steel fiber castables are mainly used for furnace doors and furnace door frames. It is a castable refractory material in which heat-resistant steel fibers of a certain size are added to a mixture composed of refractory aggregates, binders, and admixtures. It can inhibit the shrinkage of castables during curing, baking, and high-temperature use. Improve the toughness, mechanical impact resistance, and mechanical strength of the castable, and improve the thermal shock resistance of the castable. Prevent microcracks generated in the castable from expanding or extending under the action of thermal stress and mechanical stress, resulting in breakage or peeling.

3. Mullite Castable

Mullite-based wear-resistant refractory castables are high-purity refractory materials that are scientifically formulated with synthetic sintered mullite or fused mullite as the main raw material. It has the characteristics of high fire resistance stability, high fire resistance temperature, good resistance to acid and alkali chemical erosion, and stable volume change at high temperatures. It is an ideal refractory material for key parts of high-temperature kilns.

Refractory materials for aluminum melting furnaces, each material has its unique characteristics when used. So far, refractory materials have been developed, so many varieties are available because refractory materials can be used in boilers. During construction, refractory materials are provided exclusively for the boiler structure. Free to get refractory lining solutions from Zhengzhou Rongsheng Kiln Refractory Company.