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Casting Technology
PT Casting
Some shrinkage voids are formed under the casting scar in the annealing process . The blocks(PT)having such voids ,while installed and used in glass furnaces in a proper manner ,present no serious in furnace performance and life.
QX Casting
A special casting technique which causes shrinkage voids to be concentrated toward one end of the blocks , allowing the other end to become compact for maximum use.
ZWS Casting
ZWS is called Reinforced Casting , which reserves only few small voids under the casting scar and is widely used for the sidewall blocks since it has compact structure.
WS Casting
WS Casting is performed with a large header in which most the voids are concentrated . The header is subsequently cut off after cooling . The resultant block is compact and substantially viod-free.
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Item
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Unit
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Index
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AZS33-Y
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AZS36-Y
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AZS41-Y
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Chemical Composition
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Al2O3
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%
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(Margin)
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|
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ZrO2
|
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32.0～36.0
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35.0～40.0
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40.0～44.0
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|
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SiO2
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≤
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|
16.0
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14.0
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13.0
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|
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Na2O
|
|
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1.50
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1.60
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1.30
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|
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Fe2O3+TiO2+CaO+MgO+Na2O+K2O+B2O3
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|
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2.50
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2.50
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2.50
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Fe2O3+TiO2
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|
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0.30
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0.30
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0.30
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B.D.
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≥
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g/cm3
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3.70
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3.75
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3.90
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A.P.
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≤
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%
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2.0
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1.5
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1.3
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Stactic Corrosion of Melting Glass(soda lime glass)
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≤
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Mn/24h
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1.60
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1.50
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1.30
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Exudating Temp.
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≥
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℃
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1400
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1400
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1400
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Blistering rata
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≤
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%
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2.0
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1.5
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1.0
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Glass exudation
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%
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Providing actual tested date
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Thermal Expansion
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%
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Providing actual tested date
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Unin Volume>
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PT、QX
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g/cm3
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3.40
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3.45
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3.55
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ZWS
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3.55
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3.65
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3.80
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WS
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3.60
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3.7
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3.85
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Ps. The above date is subject to blocks with weight over 50 Kgs
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