Fused Zirconium Corundum Brick

Zirconium Corundum brick fused by oxidation method has good corrosion resistance to glass liquid and low stone rate、bubble and glass phase exudation rate and does not pollute the glass liquid. It is mainly used in the contact parts of the glass kiln and the glass liquid, and the parts with high corrosion resistance requirements, which are selected according to the use parts.

Introduction to AZS bricks

Fused zirconium corundum bricks are also called AZS bricks. A refers to Al₂o₃, Z refers to zirconia, and S refers to silica. There are three types of AZS bricks, among which 33, 36, and 41 are named according to the different contents of alumina. of. For example, AZS36# refers to fused zirconium corundum bricks with an alumina content of 36%.

Parameter of AZS Bricks

Item		Index
		AZS33#	AZS36#	AZS41#
Al₂O₃ %		Balance
ZrO₂ %		32	34	40
SiO₂ %		16	14	12.5
Fe₂O₃+TiO₂+CaO+MgO+K₂O+Na₂O %		≤2.5	≤2.5	≤2.0
Bulk Density(Dense part) g/cm³		3.7	3.75	4.0
Apparent Porosity %		2.0	1.5	1.3
Glass Phase Initial Precipitation Temperature ℃		1400	1400	1400
Glass Phase Exudation % 1500℃×4h		2.0	3.0	3.0
Static Resistance To Liquid Glass Erosion Depth mm/24h Ordinary Soda Lime Glass 1500℃×36h		1.6	1.5	1.3
Bubble Precipitation Rate % Ordinary Soda Lime Glass 1300℃×36h		2.0	1.5	1.0
Specific Gravity g/cm³	PT/QX	3.5	3.5	3.6
	ZWS	3.6	3.6	3.8
	WS	3.65	3.7	3.9

Application of fused zirconium corundum bricks

Fused zirconium corundum brick is widely used in the hot spots of glass furnaces such as the pool walls, flow holes, kiln sills, feeding port corners, pool bottom bubbling, and other key parts; AZS bricks can also be used in other kilns.

Preparation method of fused zirconium corundum bricks

Fused zirconium corundum bricks are formed by heating and melting pure alumina powder, zirconium oxide, and silica in an electric furnace, then casting them into a heat-set mold, and then cooling them.