Magnesia chrome brick

Magnesia brick

Model Number:SRMG-8,SRMG-12,SRMG-15,SRMG-18,ERMG-12,ERMG-16,ERMG-20

Certification:ISO 9001-14001

Minimum Order Quantity:5MT

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Magnesia chrome brick descripti

Magnesia chrome brick is an alkaline refractory product, which is made of periclase and magnesia chrome spinel, and is fired at 1600~1800 °C in an oxidizing atmosphere. It can also be made into non-burned brick by chemical bonding agent such as water glass.According to the raw materials and process characteristics of the products, it can be divided into silicate-bonded magnesia-chrome bricks, direct-bonded magnesia-chromium bricks, re-combined magnesia-chrome bricks, semi-recombined magnesia-chrome bricks, pre-reacted magnesia-chrome bricks Casting magnesia chrome bricks.

Directly combined with magnesia chrome bricks is produced by the combination of sintered magnesia and chromite. The raw material is required to have a low SiO2 content and is fired at a high temperature of 1700 ° C or higher to form a direct bond between the periclase and the chromite particles.

The semi-recombined magnesia chrome brick is made of fused magnesia sand and magnesia, chromite or pre-reacted magnesia chrome. The article has some features of recombining magnesia chrome bricks and directly combining magnesia chrome bricks or pre-reacted magnesia chrome bricks. Semi-recombined magnesia chrome brick can be used in vulnerable parts of steelmaking electric furnace, RH, DH vacuum degassing device, secondary refining slag line parts such as VOD, LF, ASEA-SKF, AOD, steelmaking converter, cement rotary kiln and glass melting Kiln regenerators, etc.

The fused cast magnesia chrome brick is a refractory product obtained by electrofusion and casting of magnesia and chrome ore. It is characterized by large pores and isolated, and the product is dense, high in strength, corrosion resistant and sensitive to temperature changes. The chemical properties of magnesia-chrome bricks are alkaline. Compared with magnesia bricks and chrome bricks, the thermal shock resistance is good, the volume is stable at high temperatures, and the load softening temperature is high.

Commom Magnesite chrome brick

Chemical composition and technical performance	Product brand
	SRMG-8	SRMG-12	SRMG-15	SRMG-18
MgO(%)	≥65	≥60	≥55	≥52
Cr₂O₃(%)	≥8	≥12	≥15	≥18
SiO₂(%)	≤1.5	≤1.5	≤1.8	≤1.8
Apparent porosity(%)	≤1.5	≤18	≤18	≤1.8
Cold crushing strength(MPa)	≤1.5	≥40	≥40	≤1.8
0.2MPa refractoriness under load T0.6(^oC)	≥1670	≥1670	≥1670	≤1.8
Thermal shock resistance （1300^oC air cooling) （1100^oC water cooling)	≥30 ≥6	≥30 ≥6	≥30 ≥6

Fused Magnesite chrome Brick

Chemical composition and technical performance	Product brand
	ERMG-12	ERMG-16	ERMG-20
MgO(%)	≥60	≥55	≥50
Cr₂O₃(%)	≥12	≥16	≥20
SiO₂(%)	≤1.5	≤1.8	≥20
Apparent porosity(%)	≤16	≤16	≤16
Cold crushing strength(MPa)	≥40	≥40	≥40
0.2MPa refractoriness under load T0.6(^oC)	≥1700	≥1700	≥1700
Thermal shock resistance （1300^oC air cooling) （1100^oC water cooling)	≥15 ≥4	≥15 ≥4	≥1700