AZS Refractory Bricks & Blocks are produced from alumina powder, zirconia sand and additive. Zirconia content defines their corrosion resistance. AZS Fused Cast Refractories are the most widely used materials in glass melting furnaces, frit kilns and occasionally some foundry plants. AZS Refractory Bricks have low potential for stoning, blistering and exudation of the matrix glass. Therefore, most suitable for use in superstructures of melters, side walls of refiners, paving blocks, and forehearth channel blocks. Fused cast AZS bricks are manufactured by fusing raw material and shaped in the mould. Then after further processes of cooling and burning, the fused cast AZS bricks are final produced. Fused cast AZS bricks are the most widely used materials in glass industry furnaces. According to its different ZrO2 content， it can be classified as AZS 33, AZS 36, AZS 41, which basically defines their corrosion resistance and their applications. While according to casting method, they can be classified with regular/normal (PT/RC/NC), oriented (TC/OC/QX), reduced cavity (ZWS/ENC/EC/RC), or without cavity – void free (WS/VF/FC). Characteristics of AZS Refractories 1. High refractoriness under load 2. High-temperature endurable 3. Strong corrosion resistance 4. High thermal shock resistance 5. Good volume stability at high temperature 6. Low pollution 7. High hot crush strength 8. Good spalling resistance 9. Good wear resistance Application of Fused Cast AZS bricks/blocks 1. Important parts of furnaces where chemical erosion is serious and temperature changes frequently 2. Superstructures of melters of glass furnaces 3. Side walls of refiners of glass furnaces 4. Paving blocks for glass furnaces 5. Lining of glass furnaces 6. Forehearth channel blocks for glass furnaces 7. Sodium silicate furnaces 8. Ceramic frit furnaces 9. Foundry plants

Item		AZS33	AZS36	AZS41
Chemical composition	Al2O3	leavings	leavings	leavings
	ZrO₂	32.00~36.00	35.00~40.00	40.00~44.00
	SiO₂	≤16.00	≤14.00	≤13.00
	Na₂O	≤1.45	≤1.45	≤1.30
	Fe2O3+TiO2+CaO+MgO+Na2O+K2O	≤2.00	≤2.00	≤2.00
	Fe2O3+TiO2	≤0.30	≤0.30	≤0.30
Bulk Density		≥3.75g/cm3	≥3.80g/cm3	≥3.95g/cm3
Apparent Porosity		≤1.50%	≤1.00%	≤1.00%
Static anti-corrosion rate of glass liquid (normal soda-lime glass,1500℃x36h)		≤1.50mm/24h	≤1.40mm/24h	≤1.30mm/24h
Exudation temperature of vitreous phase		≥1400℃	≥1400℃	≥1400℃
Bubble precipitation rate (normal soda-lime glass, 1300℃x10h)		≤2.00%	≤1.50%	≤1.00%
Vitreous phase seepage amount（1500℃x4h)		≤2.00%	≤3.00%	≤3.00%
Volume weight	PT、QX	≥3.45g/cm3	≥3.45g/cm3	≥3.55g/cm3
	ZWS	≥3.60g/cm3	≥3.70g/cm3	≥3.85g/cm3
	WS	≥3.70g/cm3	≥3.80g/cm3	≥3.95g/cm3
Typical Application		Mainly used in pool wall ,bottom of kiln etc ..key parts of glass kiln