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Magnesia Chrome Brick

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Shape Refractory

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Magnesia Chrome Brick Details

Magnesia Chrome Brick is characterized by a high direct bonding rate and large crystals. It has good resistance to heat flaking. Low alkali neutrality has good slag resistance when repairing low acid feed furnaces. The main raw materials for manufacturing magnesia-chrome bricks are sintered magnesium and chromite. The purity of the magnesium oxide raw material should be as high as possible. The chemical composition requirements of chromite are: Cr 2 O 3: 30-45%, CaO: ≤1.0-1.5%.

Features

Magnesia Chrome Brick has the following characteristics:

Good thermal shock resistance

Excellent slag wear resistance

Good cold compression strength

High temperature resistance and high fire resistance

High-grade chrome ore raw materials

Lower impurity content

Applications
Magnesia Chrome Brick is mainly used in the metallurgical industry, such as the construction of flat-bottom furnace roofs, electric furnace roofs, refining furnaces outside the furnace, and various non-ferrous metal smelting furnaces. The high-temperature part of the wall of the ultra-high power electric furnace is made of fused cast magnesia-chrome bricks, and the high-corrosion area of the external refining furnace is made of synthetic materials. In addition, magnesia-chrome bricks are also used in the cement rotary kiln firing zone and glass kiln regenerators.

Specifications

Brand Properties		RMC-22	RMC-16	RMC-12	DMC-22	DMC-16	DMC-8
Apparent Porosity (%)		15	15	15	16	17	18
Bulk Density (g/cm3)		3.25	3.20	3.20	3.15	3.0	2.95
Cold Crushing Strength (MPa)		50	50	50	40	40	40
@ 1400℃ Thermal Linear Expansion(%)		1.8	1.5	1.2	1.8	1.5	1.2
950℃ （times）Thermal Shock Resistance air cool		60	55	50	40	40	40
@0.2MPa Refractoriness Under Load (℃)		1700	1700	1700	1700	1650	1600
Chemical Composition (%)	MgO	55	65	75	55	65	75
	Cr2O3	22	16	12	22	16	8
	SiO2	1.5	1.5	1.5	2.0	2.0	2.5
Main Applications		Rotary & Shaft Kiln AOD COD RH EAF & Ladle Nonferrous Metal Furnace Hot-blast furnace Glass kiln

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