Refractory bricks are mainly made from chamotte, flint clay and combining clay powder, being high pressure pressed and sintered in high temperature.
Low porosity bricks are made from low mullite stones, the main mineral composition of the low mullite stones are pressed and sintered mullite phases. The bricks have very good physical and chemical properties in high temperature conditions.
Fire Clay Brick | Lower Porosity clay brick | |||
DK-32 | DK-34 | DK-15 | DK-12 | |
Al2O3 | ≥40 | ≥42 | ≥42 | ≥45 |
Refractoriness °C | ≥1710 | ≥1750 | ||
0.2MPa Refractoriness under load °C | ≥1320 | ≥1400 | ≥1470 | ≥1500 |
Permanent liner change% | 1350°C×3h +0.2~-0.5 | 1400°C×2h +0.1~-0.4 | -0.2~+0.4 | +0.05~-0.1 |
Apparent Porosity % | ≤24 | ≤22 | ≤15 | ≤12 |
Cold crushing strength Mpa | ≥19.6 | ≥29.4 | 58.8 | 68 |
Bulk Density g/cm3 | 2.1 | 2.15 | 2.3 | 2.37 |
ron & steel making industry | Blast furnace,hot blast furnace(stove),pellet shaft furnace,hot metal ladle,steel ladle,tundish,eating furnace,soaking pit furnace,heat treatment furnace,refining furnace,reheating furnace,metal mixter furnace,cupola furnace etc thermal technology equipment |
Non-ferrous Metal industry | Smelting furnace, reverberatory furnace etc |
Building materials industry | Cement kiln,glass kiln,ceramic kiln,lime kilns,kiln car,tunnel kiln,rotary kiln |
Energy&Incineration | Coke oven,general boiler,power generation boiler,circulating fluidized bed boiler,electric furnace,carbon roasting furnace,waste incinerators |
Others | Petrochemical industry furnace,Pizza oven |