The invention relates to the
fire resistance material technical field, in particular to a half silica
brick of 7.63m for
coke oven, which solves the problem of unstable volume, weak rusty resistance, easy expansion and easy shrink in high temperature for long time of the prior the half silica
brick which is produced by adopting pyrauxite material. The
raw material formulation comprises crude
bauxite cribble
powder which is ranged from 8 percent to 12 percent, crude
bauxite medium
powder which is ranged from 44 percent to 48 percent,
fire resistance clay
fine powder which is ranged from 22 percent to 26 percent, silex medium
powder which is ranged from 18 percent to 22 percent,
potassium feldspar which is ranged from 1.9 percent to 2.1 percent and pulp which is ranged from 0.45 percent to 0.55 percent. The crude
bauxite cribble powder, crude bauxite medium powder,
fire resistance clay
fine powder and silex medium powder are mixed into a wet roller pro rata, then
potassium feldspar is mixed into and pulp is mixed after grinded for 1 to 2 minutes to get mud material after grinded from 15 to 20 minutes. The mud material is mixed to uniform and even, then gets out of the roller into a mold. The invention has the advantages of more superior rationalize index of half silica
brick than the
national standard, stable volume, strength acidity
erosion resistance, unshrinkable function in high temperature1350 DEG C for long time, higher weight soften temperature. The invention completely coincides the demands for brick of
coke oven and dry
quenching coke oven.