There are many kinds of industrial aluminum melting furnace, mainly reflection furnace, induction furnace, etc., the destruction of the furnace lining is mainly the penetration of aluminum liquid and scouring its lining with clay bricks, high alumina refractory bricks and corundum mullite brick masonry, but also with high alumina refractory castables and refractory plastic lining, due to the use of good conditions, the furnace life is longer.
First of all, refractories for reflector furnace, reflector furnace is divided into fixed and tilting type, using gas or heavy oil as fuel. Aluminum smelting is fixed reflection furnace, non-working layer with refractory fiber felt and clay insulation refractory brick masonry, molten pool above the part of the working layer with clay brick masonry, but also available high alumina refractory castables or prefabricated blocks. Melting pool work layer according to the use of different techniques, its material is also different, using Al2O3 content of more than 75% of the high alumina refractory brick masonry or more, but also available Al2O3 content of 80% outside the high alumina refractory castables poured into the overall work layer, when melting high-purity metal aluminum, the melting pool work layer should be high purity mullite brick, zircon brick or corundum brick masonry. Aluminum discharge mouth, flow aluminum tank and its liner, in order to resist the penetration and erosion of aluminum liquid, using large silicon carbide brick masonry.
Then the induction furnace with refractory materials, generally with clay bricks or three levels of high alumina refractory brick masonry. The bottom of the furnace is sometimes poured with high alumina refractory castables first, and then masonry high alumina refractory bricks. When the capacity of induction furnace is less than 10t, its lining body can be made of high alumina refractory castable or refractory pounding material with Al2O3 content of about 75%, and corundum refractory castable or dry vibrating material is also available. The liner around the inductor coil of the aluminum melting furnace is poured with corundum refractory castables as a whole.
Slot induction furnace liner shell laying 10mm asbestos sheet or refractory fiber felt, and then masonry clay thermal insulation refractory bricks or bleaching bead brick for insulation layer; work layer and coil around the liner commonly used clay refractory pounding material pounding, also available clay refractory pouring material on-site pouring, large slot induction furnace work layer, also available Al2O3 content greater than 55% of high alumina refractory brick masonry.
Resistance heating pool furnace non-working layer with clay insulation refractory bricks, drifting bead brick or insulation plate masonry. Also available in the bulk density of 0.8g/cm3 light refractory castable overall pouring; molten pool working layer using Al2O3 content of about 80% of high alumina refractory brick masonry, but also available in the bulk density of 2.4g/cm3 high alumina refractory fire castable pouring. The working layer above the melting pool is generally masoned with clay bricks or refractory castable prefabricated blocks, and can also be pounded with high alumina refractory plastic.
The bottom, wall and roof of the gas chamber furnace are composed. It can also be used jointly with alumina reflection furnace. Its furnace lining material is clay brick and high alumina refractory brick.
Aluminum refining furnace trough wall with magnesium brick masonry, the rest of the parts with clay bricks and high alumina refractory bricks, electrolysis, the trough temperature is generally 720-800 ℃, the operating temperature is low, so the service life is longer.
Post time: Dec-29-2022