Introduction Silicon Carbide Crucible Melting Aluminum
In 1820, it developed one type crucible, adopted natural graphite and fire-resistant clay material,due to graphite has good thermal conductivity and stable chemical properties, it has strong fire resistance, so its life is greatly improved.From the early heat-resistant graphite crucible to later super strong crucible,until today’s advanced silicon carbide/graphite crucibles,for melting aluminum,,mankind has gone through a long historical process.At the same time, with the development of the heat-resistant and corrosion-resistant cast iron materials and the surface coating to prevent osmosis technology,alloy cast iron crucibles have also been widely used in recent decades.Especially in the non-ferrous metal smelting field,Furnaces with melting aluminum silicon carbide crucibles occupy a large proportion. This is mainly due to a series of advantages of crucible smelting.
Characteristics Silicon Carbide Crucible Melting Aluminum
- Less damage
Because the molten metal is isolated from the flame and heated from the bottom of the silicon carbide ceramic crucible, the heat convection function is fully utilized, which is beneficial to the uniformity of charge composition and temperature, avoiding local high temperatures, and reducing oxidation loss and high-temperature volatilization of the precious alloy elements. In general, the metal loss of the crucible furnace is only 1% to 2%, while the furnace without crucible is up to 5% to 25%.
- High metallurgy quality
Since the silicon carbide ceramic crucible for melting aluminum separates the flame and the combustion products from the metal, It greatly reduces the invasion of oxidizing gas to molten metal. In addition, it is convenient to purify all metal liquid in the crucible to ensure the stability of metallurgical quality.
- Flexible production organization
When producing different types and grades of alloys，only need to replace the crucible,needn’t to worry that metal fluid may be polluted.
- Low cost,save land occupation
Compared with the same furnace with the same melting capacity, it has low investment costs ,small space occupation and easy to move.
- Easy to install and debug
Can be placed directly on the ground, it can start operation once connected the energy.
- Low maintenance costs, short downtime
The lining has a long service life because the lining is not in contact with the molten metal, it is not easy to corrode,but easy to replace the silicon carbide ceramic crucible for melting aluminum and has little impact on the job operation.
Technical Data Sheet of Silicon Carbide Crucible Melting Aluminum
| Item | Unit | Data |
| Max Working temperature | ℃ | 1380 |
| Density | g/cm³ | ≥3.02 |
| Porosity | % | <0.1% |
| Bending Strength | Mpa | 250(20℃) |
| Mpa | 280(1200℃) | |
| Modulus of elasticity | Gpa | 330(20℃) |
| Gpa | 300(1200℃) | |
| Thermal conductivity | W/m.k | 45(1200℃) |
| Coefficient of thermal expansion | K-1×10-6 | 4.5 |
| Rigidity | 13 | |
| Acid alkaline-proof | Excellent |
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