Foundry Industry
SINO-FOUNDRY—professional refractory manufacturer
Foundry Industry
Refractory for cif melting and holding copper
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
◆ 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
| 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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E-mail : sales@sfr168.com
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