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Low porosity clay octagonal tube brick
Low porosity clay octagonal tube brick
Numbering
Affiliate classification Clay brick
Weight 0
Product Description

  Product Overview:

     Clay brick is made by hard clay, calcined clay and bonding agent through pelletizing and milling, mixing as per certain ratio, pressing molding and burning under high-temperature. Fire-resistant clay bricks can be divided into special clay bricks (including clay bricks for blast furnaces, clay bricks for glass kilns and clay bricks for hot-blast furnaces) and general clay bricks.
     General clay bricks can be divided into such three grades as PN-1, PN-2 and PN-3 as per physical and chemical indexes.
     Special clay bricks can be divided into such three grades as ZN-45, ZN-40 and ZN-36 as per physical and chemical indexes.


  Physical and chemical indexes of general clay bricks:

Item Indexes
PN-1 PN-2 PN-3
0.2MPa load softening starting temperature  ℃    ≥ 1300 1250 1200
Changes in heating permanent line (1350°C×2h)    % -0.2~+0.1 -0.3~+0.1 -0.4~+0.1
Apparent porosity      %               ≤ 24 26 28
Ambient compression strength    Mpa          ≥ 30 25 20


  Physical and chemical indexes of special clay bricks:

Item Indexes
ZN-45 ZN-40 ZN-36
Al2O3        %        ≥ 45 40 36
0.2MPa load softening starting temperature  ℃   ≥ 1430 1380 1350
Changes in heating permanent line (1350°C×2h)   % -0.2~+0.1 -0.3~+0.1 -0.4~+0.1
Volume density           g/cm³       2.0~2.3
Apparent porosity      %                 ≤ 16 19(22) 22(24)
Ambient compression strength    Mpa          ≥ 60 40(35) 35(30)