In the nowadays large type of cement rotary kiln configuration, the fire brick is mainly configured as follows:
1. Front Kiln mouth: Special refractory castable for kiln mouth;
2. Lower transition zone: Special Si-Mullite brick;
3.Sintering zone: MgO-Fe2O3 Spinel brick;
4 Upper transition zone: 1680Si-Mullite brick;
5.Preheating zone: 1650 Si-Mullite Birck;
6.Safety zone: Low thermal conductivity alkali-resisting mullite brick;
7. Back kiln mouth: FA-75 stainless steel strength refractory castable.
MgO brick GB/T2275-2001
MgO-CaO brick YB/T4116-2003
MgO-Al2O3 brick YB/T5010-1993
MgO-Cr2O3 brick YB/T5001-1997
Cement Rotary Kiln use directly bonded MgO-Cr2O3 Brick JC497-1992(96)
Glass furnace use MgO brick (MgO≥95%) JC/T924-2003
MgO and MgO-SiO2 nozzle brick YB416-1980
E-fused magnesia sand is also called E-fused MgO, besides of raw material of refractory high technology products, it is also used in the power industry, aerospace, nuclear industry, etc.
E-fused magnesia sand is made of super purity natural magnesite, light burned magnesite powder, through heating and smelting in the high temperature EAF and natural cooling process. Comparing the sintered magnesite sand, the E-fused one have the high temperature resistance, under the oxidizing atmosphere and 2300℃ states, keep more steady, more strength, higher sag resisting, higher hydration resistance, etc. features.
Calcine natural magnesite or light burned MgO powder in the rotary kiln or shaft kiln during 1500-2300℃, through phase growing bigger and density changes, make Magnesite becomes almost inert sintered magnesia sand, also called dead burned magnesia sand. Sintered magnesia sand is one kind of important raw material producing the MgO quality products.