Magnesia-alumina spinel brick

Magnesia-alumina spinel bricks are made from magnesia-alumina spinel ((MgAl2O4, abbreviated MA)) as a matrix using high quality high purity magnesia and ore, containing Al2O3, by dosing, mixing, blank manufacturing, drying, roasting and other processes. Alkali refractory products are known for their superior thermal shock resistance compared to magnesia bricks and are widely used in cement rotary kilns, rotary lime kilns, open hearth furnaces, roofs of electric furnaces, etc..

Parameters of magnesium aluminum spinel brick

Subject	Index
Subject	MLJ-90	MLJ-85	MLJ-80	MLJ-75
MgO %	≥90	≥85	≥80	≥75
Al₂O₃ %	3~8	5~12	8~17	≥8~12
Apparent porosity %	≤17	≤17	≤16	≤19
Bulk density g/cm³	≥2.95	≥2.95	≥2.90	≥2.85
Cold crush strength MPa	≥45	≥45	≥55	≥40
0.2MPa Fire resistance under load ℃	≥1700			≥1650
Thermal shock resistance cycle water cooling at 1100℃	≥3	≥8	≥12	≥8

Application of magnesia alumina spinel brick

Magnesia-aluminum spinel bricks are often used in the transition zone of the rotary kiln, furnace mouth, internal lining of the cooler and other important parts.

Introduction to Rongsheng Company

Rongsheng Company is a professional fireproof material supplier with 10 years of export experience to more than 80 countries. Rongsheng's main products are various fire bricks, shaped refractory materials, metallurgical materials, thermal insulation materials and so on.