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Fused cast AZS block
Fused cast AZS block description
Fused cast AZS block is one kind of fused cast block, AZS means alumina、zircon、silica, it is the major raw materials of the fused cast AZS block.Fused cast AZS blocks usually named fused cast zircon corundum block ,according to the ZrO2 content difference ,can be named AZS 5.5 ,AZS 12 .AZS 36, AZS 33, AZS 41 and so on. Also according to the brick if have shrinkage cavities, we call them PT, QX, ZWS, WS.Fused cast azs refractory materials is widely used in glass smelting furnace, the field of steel & iron manufacture, nonferrous metals smelt, building material industry and other industrial furnace .
Compared with sintered refractories, fused cast AZS block are characterized by compact structure, low porosity,high volume density, high mechanical strength and high temperature structural strength, and strong resistance to liquid glass erosion.
At present huachen company's fused cast AZS block mainly include fused cast AZS 33 block, fused cast AZS 36 blocks, fused cast AZS 41 blocks and so on.
The technical process flow of making fused cast AZS block:
Material--Batch mixing--Melting--Casting--Insulation-- Taking out after annealing--Sample inspection--Finishing--Final inspection--Assembling, inspection--Package and shipment
Huachen refractory has passed through ISO. From the raw material to final products, our company has strict index on every step of process flow to product the best blocks for our customers.
Fused cast AZS block chemical and physical
Chemical Composition( % ) | AZS #33 | AZS #36 | AZS #41 | |
ZrO2 | ≥ 32.5 | ≥ 36 | ≥ 40.5 | |
SiO2 | ≤ 15.5 | ≤ 14.0 | ≤ 12.5 | |
Al2O3 | Remains | Remains | Remains | |
Na2O | ≤ 1.4 | ≤ 1.6 | ≤ 1.2 | |
Fe2O3 + TiO2 | ≤ 0.25 | ≤ 0.25 | ≤ 0.25 | |
Physical characters | ||||
Volume density (hardest part) | ≥ 3.80 | ≥ 3.85 | ≥ 4.05 | |
Cold crushing strength (MPa) | ≥ 300 | ≥ 300 | ≥ 300 | |
Exudation Temp. of glass phase (℃) | ≥ 1400 | ≥ 1410 | ≥ 1420 | |
Refractorinessunder load of beginning (0.2MPa) | 1700 | 1700 | 1700 | |
Corrosion Resistance to glass melt 1300℃x10h(mm/24h) | 1.5 | 1.0 | 0.7 | |
Bulk density (g/cm3 ) | PT | 3.42 | ≥ 3.55 | |
QX | 3.45 | ≥ 3.55 | ||
ZWS | 3.65 | ≥3.65 | ≥3.85 | |
WS | 3.70 | ≥ 3.75 | ≥ 3.95 | |
Crystalline phase composition ( % ) | ||||
Baddeleyite monocrystal | 32 | 35.5 | 40 | |
Glass phase | 20 | 19 | 17 | |
Corundum | 47 | 44 | 42 | |
Note: Apply to the products of weight more than 50 kg | ||||