High Chrome Brick

High chromium brick products are made of corundum and fused chromium oxide as the main raw materials, mixed with additives such as micro powder, after mixing, molding, drying, and burning paper at high temperatures in a kiln.

What is high chrome brick？

Using chromium oxide and zirconia as the main raw materials, or introducing a small amount of zirconia through high-temperature firing to obtain qualitative refractory products with a chromium oxide content of not less than 75%, and a qualitative refractory product with a chromium, alumina and zirconia content of not less than 98% become high chromium brick.

Raw materials for high chrome bricks

High chrome bricks are generally chromium oxide products produced with industrial pure chrome green as the main raw material.

High chrome brick parameters

Item	Index
Item	GGZ-75	GGZ-85	GGZ-90	GGZ-95
Cr₂O₃ %	≥75	≥85	≥90	≥95
Cr₂O₃+Al₂O₃+ZrO₂ %	≥98	≥98	≥98	≥98
SiO₂ %	≤0.2	≤0.2	≤0.2	≤0.2
Fe₂O₃ %	≤0.3	≤0.3	≤0.3	≤0.3
K₂O+Na₂O %	≤0.2	≤0.2	≤0.2	≤0.2
Apparent porosity %	≤18	≤18	≤16	≤16
Bulk density g/cm³	≥3.90	≥4.2	≥4.22	≥4.25
Cold Crush Strength MPa	≥120	≥120	≥120	≥120

High chrome brick application

High chromium bricks are mainly used in key parts of kilns such as coal chemical industry, chemical industry kilns, alkali-free glass fiber kilns, and waste incinerators.