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— CEO of MERC. Professor Wang.

Silica Brick for Hot Blast Furnace

SiO2:≧ 95%
Fe2O3:≦1%
A12O3:≦1%
True Density:≦2.33g/cm3
Apparent Porosity:≦22%
Introduction
Silica brick is mainly used for hot-blast stove, tunnel kiln, coke oven, glass kiln, acidic furnace non-ferrous metal smelting and some other thermo technical equipment in good furnace building materials.
Features
High purity, good thermal conductivity;
High refractoriness under load and high tridymite content;
Low true density, low expansion, low creep and low residual quartz content;
Good dimension and appearance.
Application
Widely used in hot blast stoves.
Used in high temperature sections of the checker chamber in hot blast stoves.
Used as low-cost alternative to andalusite and mullite checker bricks in hot blast stoves.
High refractoriness, average thermal shock resistance makes it suitable in consistent temperature environment.
Specification
ITEM 
 
Wall bricks
Dome Bricks
Checker Brick
SiO2    % ≥95 ≥95
A12O3    % ≤1.0 ≤1.0
Fe2O3  % ≤1.0 ≤1.0
Apparent Porosity   % ≤22 ≤24
True Density   g/cm3 ≤2.33 ≤2.33
Cold Crushing Strength  MPa ≥40 ≥35
Refractoriness Under Load  (0.2MPa)  ℃ ≥1650 ≥1650
Residual Quartz  % ≤1.0 ≤1.0
Creep Rate  0.2MPa (1550℃*50h) % ≤0.6 ≤0.6
Permanent Linear Change ( 1450℃*2h)  % ≤0.2 ≤0.2
Thermal Expansion Coefficient  (1000℃  )  % ≤1.26 ≤1.26


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