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microporous aluminia-carbon brick

product details

microporous aluminia-carbon brick is using special grade bauxite clinker, corundum, graphite as the main raw materials, mixed with many kinds of mirco-powder as additive, resin as binder, forming under high pressure, firing under the reducing atmosphere at high temperature. it has good micro porosity, good alkali resistance, high coefficient of thermal conductivity.
the product cab be used for bosh, belly and cooling wall of blast furnace with different furance capacity.
its main technical performace is as below:
items unit microporous alumina-carbon brick
wlt-1 wlt-2 wlt-3
al2o3                   % ≥65 ≥60 ≥55
fe2o3                  % ≤1.5 ≤1.5 ≤1.5
c                       % ≥11 ≥11 ≥9
bulk density g/cm3 ≥2.85 ≥2.65 ≥2.55
appearance porosity % ≤16 ≤17 ≤18
cold crushing strength mpa ≥70 ≥60 ≥50
air permeability mda ≤0.5 ≤2.0 ≤2.0
average pore size µm ≤0.5 ≤1.0 ≤1
1µm pore volume          % ≥80 ≥70 ≥70
endurance of molten iron erosion, 1100    % ≤2 ≤3 ≤4
alkali resistance
(reduction in strength)
  
% ≤10 ≤10 ≤15
heat conductivity coefficient, 
0-800
   
w/m..k ≥13 ≥13 ≥13
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