Directly Bonded Magnesia Chrome Bricks

Description

Directly bonded magnesia chrome bricks refer to products that are fired at a temperature above 1700°C from chrome ore with low impurity content and relatively pure magnesia.

Features

Slag resistance.
Good high temperature performance.
Good thermal shock resistance.

Specification

Index
MgO (%)	≥60	≥70	≥70	≥75	≥80
Cr2O3 (%)	≥12	≥9	≥9	≥6	≥4
SiO2 (%)	≤3.2	≤3	≤2.8	≤2.8	≤2.5
Apparent porosit (%)	≤19	≤19	≤19	≤18	≤18
Bulk density,kg/m³	≥3000	≥2980	≥2980	≥2950	≥2930
Normal temperature compressive strength, MPa	≥35	≥40	≥40	≥40	≥40
0.2MPa load softening start temperature ℃	≥1580	≥1580	≥1600	≥1600	≥1600
Thermal shock stability (1100℃~water cooling), second	≤4	≤4	≤4	≤4	≤4

Application

Directly bonded magnesia-chrome bricks are mainly used in cement rotary kiln, steelmaking electric furnace lining, refining furnace (RH upper tank, lower tank permanent lining, VOD furnace cladding), non-ferrous metallurgical furnace, glass kiln regenerator, lime kiln, mixed iron Furnace etc.