Model Number

SK34 SHK general fire cay refractory brick

Magnesia brick is a kind of Alkalescency refractory products that made from the sintered magnesium with its content of 87% and that are combined with silicate. Since its combination composition is mainly CMS-M2S system, its Load softening temperature is low and thermal shock resistance is poor that determine its application is few. But it is widely sued in the furnaces and kilns that have alkaline atmosphere. The essential properties of magnesia brick depends on the nature of the raw materials, the mineral composition, microstructure and closely on the density of the products.
According to the physical and chemical index, there are 4 models of Magnesia brick and magnesium silica brick; they are MZ-91, MZ-89, MZ-87 and the MGZ-82.

Index	Item
	MZ-91	MZ-89	MZ-87
MgO/%?	91	89	87
CaO/%?	3	3	3
0.2Mpa refractoriness under load , °C?	1550	1540	1520
Apparent porosity, %?	18	20	20
Compress strength,/MPa?	58.8	49	39.2
Linear change after reheating%   ?             (1650°C , 2h)	0.5	0.6

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