Corundum bricks are mainly used in iron-making blast furnaces and blast furnace hot blast furnaces, refining furnaces outside steel-making furnaces, sliding water heaters, glass melting furnaces and petrochemical industrial furnaces, etc.
Corundum bricks for glass melting furnace
Sintered corundum bricks refers to a corundum refractory product made of sintered alumina clinker with an alumina content of 70%-90%. Gas-bonded corundum bricks has high melting point, stable performance at high temperature, good mechanical strength and wear resistance at room temperature and high temperature, and excellent resistance to metal corrosion and redox resistance. The production process of sintered corundum bricks is to crush the sintered corundum bricks to 3mm coarse particles and some fine powders less than 0.074mm, some add a small amount of clay and other binders for mixing, and use a high-pressure friction brick press or hydraulic press to form. After drying, it is put into high temperature and fired. Generally, sintered corundum bricks with higher purity have a firing temperature of 1750-1800 °C. If a small amount of clay or additives is added, the firing temperature can be 1600~1700℃.
project |
index |
|
WGZ-80 |
WGZ-80 |
|
Al2O3%≥ |
80 |
83 |
Fe2O3%≤ |
1.0 |
1.0 |
Apparent porosity%≤ |
15 |
13 |
Bulk density%(g/cm3)≥ |
3.1 |
3.2 |
Cold compressive strength/MPa≥ |
130 |
150 |
molten iron erosion index%≤ |
1.5 |
1.0 |
Slag resistance%≤ |
10 |
8 |
Air permeability≤ |
0.5 |
0.5 |
Average pore size um≤ |
0.5 |
0.3 |
Alkaline resistant%≤ |
10 |
10 |
Sintered corundum bricks have been widely used as lining materials in petrochemical thermal devices with high temperature, high pressure, chemical erosion and severe mechanical wear. The equipment achieves the purpose of large load, long cycle, low energy consumption and low cost.
The heavy part of the raw materials for the chrome zirconium corundum composite brick is sintered tabular corundum, high-purity chromium oxide, high-purity zircon, and Guangxi white cement.As the main raw material, the light part of the raw material is made of 47 mullite, kyanite, floating beads and coke gemstones as the main raw materials. During molding, a separator is set in the middle of the mold, and heavy materials and light materials are added at both ends. After high pressure molding , finished products made of high temperature sintering.
The heavy parts of the chrome-zirconium mullite composite bricks are made of high-purity sintered mullite, high-purity chromium oxide, high-purity zirconia, and Guangbai mud as the main raw materials, and the light part of the raw materials are made of 47 mullite, kyanite, Bleaching beads, coke gemstones and Guangxi white mud are the main raw materials
Chrome corundum brick refers to corundum refractory products containing Cr2O3. At high temperature, Cr2O3 and Al2O3 form a continuous solid solution, so the high temperature performance of chromium corundum products is better than that of pure corundum products. Chromium corundum products are widely used, and the content of Cr2O3 is mostly in the range of 9% to 15%.
Brown corundum refractory brick is made of fused corundum as the main raw material. It is formed by high pressure and fired at high temperature. It has high thermal shock stability, low porosity, low expansion, good resistance to melt vapor and gas erosion, and excellent oxidation resistance. Dimensionally accurate advantages.
Refractory castable is a kind of refractory material that does not need to be formed and has good fluidity after being fired and stirred with water.
White corundum is made from industrial alumina powder, which is smelted in an arc at a high temperature above 2000 ℃ and then cooled. After crushing and shaping, magnetic separation to remove iron, it is divided into various particle sizes.
Ceramic wear resistant castable is a special material and is a new type of material developed recently. It not only meets the needs of national defense cutting-edge products and high-tech development, but also meets the requirements of the rapid development of the national economy. Therefore, it is easier for users to accept than other materials, so it develops rapidly.
Brown Fused Alumia powders are fused wIth premium raw materials and 3500 KVA furnace. It is perfect material specifically manufactured to be used for general abrasive applications in bonded abrasive tools, polishing and sandblasting grit. It has lower hardness and abrasive capacity than diamond, boron carbide, and silicon carbide, it is widely used for grinding ferrous materials, finishing tough and hard materials. It is also be used as high-class refractory materials. Brown Fused Alumia is offered in macro and micro powder form, in both F and P grades.