Refractory materials for aluminium melting furnace

The main equipment for thermal melting aluminum has calcinations sintering furnace, melting furnace and electrolytic cell. The rotary kiln firing with a lining of high aluminum brick masonry are commonly used, other parts available clay brick as a liner, insulation layer close to the furnace shell at laying a layer of refractory fiber felts and masonry a layer of light brick or light weight castable refractory pouring.

The most common aluminum smelting equipment is a reflective furnace. The lining of the molten aluminum contact. In general, the Al2O3 content is 80% ~ 85% of the high aluminum brick masonry, melting high purity aluminum metal, are advised to the mullite brick and corundum mullite brick. Some factories in hearth slope and scrap aluminum material, easy erosion and wear parts, the use of silicon nitride bonded silicon carbide brick masonry. Flow aluminum groove and an opening of the aluminum and other parts, aluminum melt erosion heavier, the general use of self bonding or silicon nitride combined silicon carbide brick masonry, and also useful zircon brick lining. The effect of the refractory fiber cone is better than that of the aluminum outlet. The lining does not contact the molten aluminum, using clay brick, fireclay refractory castable refractory material such as plastic or masonry. In order to speed up the melting speed and save energy, light brick, light refractory and refractory fiber products are widely used in the present work.

Aluminum smelting induction crucible furnace is more commonly used equipment, its lining generally use Al2O3 content is 70% ~ 80% of high alumina castable refractory ramming material production, but also useful for just corundum brick concrete lining of.

Aluminum molten liquid from the furnace outlet, the flow of aluminum trough. The slot liner generally adopts silicon carbide brick, useful also fused silica foam perform. Such as the use of precast block for tank lining, the surface should be coated fused silica or as protective layer with high alumina cement electric fused silica foam refractory castable.