First of all, lightweight high-aluminum bricks and heavy high-aluminum bricks are both refractory bricks, but the use of the two is very different. First, the introduction of light high aluminum bricks and heavy high aluminum bricks

Lightweight high aluminum brick is also known as high aluminum heat insulation brick. Lightweight refractory with alumina content of more than 48%, mainly composed of mullite and glass phase or corundum. Bulk density 0.4 ~ 1.35g/cm3. Porosity 66% ~ 73%, compressive strength 1 ~ 8MPa. Good thermal shock resistance.

Heavy high alumina bricks are usually made of high bauxite clinker and a small amount of clay, which is poured and formed in the form of mud by gas generation or foam method after grinding, and is fired at 1300 ~ 1500℃. Sometimes industrial alumina can be used to replace part of the alumina clinker. It is used for lining and insulating layer of masonry kiln, as well as parts without erosion and scouring of strong high-temperature molten material. When directly in contact with the flame, the surface contact temperature shall not be higher than 1350℃.

Second, what is the difference between lightweight high-aluminum bricks and heavy high-aluminum bricks

Lightweight high-aluminum bricks are usually called thermal insulation firebricks, also known as thermal insulation firebricks. First of all, literally, the weight of lightweight high-aluminum bricks and heavy high-aluminum bricks is a completely different product. Lightweight high-aluminum brick, also known as heat-insulating high-aluminum brick, its essential purpose is thermal insulation and thermal insulation function. In normal use, it is not in direct contact with the temperature of the furnace, and it is a firebrick product that is close to the furnace wall and has the effect of heat insulation and heat preservation.

Heavy high aluminum brick, also known as high aluminum brick, its own weight is many times heavier than light high aluminum brick, in the process of use is not for heat insulation, more importantly, for fire temperature, usually in the process of use with the furnace flame in direct contact, so heavy high aluminum brick usually has a high temperature resistance.

Selection of high bauxite clinker combined with refractory clay, according to the multi-stage ingredients, press forming, high temperature firing.