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Refractory for cif melting and holding copper
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Refractory for cif melting and holding copper

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详细描述
Two types of lining materials for copper melting: 
1.SIL-RAM ® 120CU is acid lining based on fused silica, with excellent volume stability and resistance to molten copper penetration. It is recommended as the lining of large coreless induction furnace for melting brass and bronze;
 
2.ALU-RAM ® CU series are alumina-based materials added with silicon carbide, fused silica or magnesium oxide.The addition of silicon carbide improves the resistance to slag and corrosion.The addition of magnesium oxide improves the density and erosion resistance;This series include ALU-RAM ® 122CU, ALU-RAM ® 125CU, ALU-RAM ® 130CU, ALU-RAM ® 135CU etc.
 
Main points of demolding during sintering process:
◆ For large furnaces, use meltable molds. The lining needs to be heated up to the specified temperature before pulling out the mold, and a long-time heat preservation is necessary. If the process control is not strict, the lining will be damaged easily;
◆ The penetration of copper is strong, so the density of the lining during installing must be ensured, and the paper or tape for wrapping the mold is easily be broken during the installation process, so avoid the scraps falling into the lining;
◆ The large furnace must use the split mold, and use gas for sintering as much as possible, if use the electric power for sintering, the joint of the mold is easy to have arc discharge, that will damage the mold, and it is not conducive to demolding later;
◆ It is also a key link of the charging and melting process after demolding. The surface strength of the lining after the first stage sintering is not very high. If the charging material is too big, the lining is easily damaged, especially in the upper part when the charges are sinking, the worst result is to reject the lining
 
耐热材料
 
NO. AREA PRODUCT NAME DESCRIIPTION Al₂O₃
%
SiO₂
%
Cr₂O₃
%
CaO
%
Bulk Density
g/cm³
Max Temp
1 Cover ULTRA-CAST 200 Aluminum silicon
based castable
45.1 49.5   2.0 2.30 1650
2 Spout ALU-PAK® 67 Alumina silicon
based plastic
68.0 26.0     2.65 1700
ALU-PAK® 90H Aluminum silicon
based plastic
89.0 5.0     2.85 1700
3 Upper ring ULTRA-FLO 85 Alumina based low
cement castable
84.0 12.0   2.0 2.85 1750
ULTRA-FLO 60 Mullite based low
cement castable
58.1 35.6   1.3 2.45 1650
4 Coil grout COIL CRETE 390 Coil material(white) 85.0 6.0   5.0 2.60 1760
COIL CRETE 590 Coil material(red) 91.0 2.0   5.0 2.80 1760
5 Repair ALU-SEAL 68 Aluminum silicon
based plaster
68.0 26.0     2.65 1650
ALU-PAK® 90H Alumina based plastic 89.0 5.0     2.85 1750
6 Working
lining
SIL-RAM 120CU Fused silica based
dry ramming mass
0.5 99.2     1.90 1650
ALU-RAM 135CU Corundum based dry
ramming mass
89.0 3.5   3.5(SIC) 3.05 1550
ALU-RAM 122CU Alumina based dry
ramming mass
80.0 13.0   4(SIC) 2.60 1420
ALU-RAM 125CU Alumina based dry
ramming mass
80.0 13.0   4(SIC) 2.60 1450
ALU-RAM 130CU Corundum-spinel based
dry ramming mass
84.0 2.5 11.0(Mgo)   3.20 1550
ALU-RAM 230CU Corundum-spinel based
dry ramming mass
84.0 2.5 11.0(Mgo)   3.20 1600
7 Pushing block ULTRA-FLO 85 Alumina based castable 84.00 12.00   2.0 2.15 1750
8 Sliding layer SFR-MICA 0.3mm Mica Paper           900

 

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