1. Description:
The silicon carbide brick used in electrolytic aluminum cell is improved on the basis of the traditional production process of silicon carbide brick. It specially produces silicon carbide brick suitable for the application of electrolytic aluminum cell, adding silicon oxide powder, silicon nitride powder or fused mullite powder. In the process of high-temperature sintering, silicon nitride and silicon carbide polymer are formed, with denser organizational structure, higher strength and better thermal conductivity. The important thing is that the product does not react with cryolite, Excellent liquid aluminum penetration resistance and corrosion resistance.
The refractory used for the side lining of electrolytic aluminum cell must have the following characteristics: high resistivity, good thermal conductivity, no chemical reaction with molten cryolite, small porosity, no electrolyte penetration, and no oxidation by air.
Due to the structural characteristics of silicon carbide brick, it has a series of excellent characteristics, such as high hardness, high temperature resistance, oxidation resistance, high thermal conductivity, low expansion rate, excellent thermal shock performance, good chemical stability and non-ferrous metal wetting. Therefore, silicon carbide brick is particularly suitable for use as a refractory for the lining of electrolytic aluminum cells.
2. Main performance indexes of Silicon Carbide Brick for Electrolytic Aluminuim Furnace
ITEM | UNIT | JCS-1 | JCA-2 |
SIC | % | ≥87 | ≥85 |
SIO2 | % | 8 | 3 |
Al2O3 | % | --- | ≥10 |
Fe2O3 | % | ≤1.0 | ≤1.0 |
Porosity | % | ≤18 | ≤18 |
Dneisty | g/cm3 | ≥2.65 | ≥2.55 |
Compressive strength | Mpa | ≥80 | ≥85 |
Refractoriness under load | ℃ | ≥1600 | ≥1550 |
Thermal shock stability,950℃,air cooling | times | ≥40 | ≥35 |
Coefficient of heat conductivity | w/m.k | ≥8 | ≥6 |
3. Characteristics:
1) Good wear resistance
2) Strong corrosion resistance, non-stick aluminum, no slag
3) High strength, strong thermal conductivity
4) Good thermal shock stability
4. Application: aluminum melting furnace, incinerator, heating furnace
The side lining of aluminum reduction cell is an important part of the structure. It is required that the side wall material should have the following properties at high temperature: high resistivity, good thermal conductivity, no chemical reaction with molten cryolite, small porosity, no penetration of electrolyte and aluminum, and no oxidation by air. As silicon carbide brick has excellent properties, such as high strength, high hardness, high temperature resistance, oxidation resistance, high thermal conductivity, low thermal expansion rate, excellent thermal shock resistance, good chemical stability, not being wetted by non-ferrous metals, and good high temperature chemical corrosion resistance, it is especially suitable for being used as lining refractory of aluminum reduction cell. Nowadays, silicon carbide combined with silicon nitride material is often used. The product has the best electrolyte resistance. Although the product is wetted by the melt, the penetration is very shallow and there is no decomposition
5.Our company promises to customers: to provide free technical exchanges and services with customers, and to provide samples to customers free of charge without any sample fees.
6.Achievements generated: Our company has previously shipped 70 tons to Japan.
Do you want to find a professional supplier of refractory products?
Do you want to find a stable and credible supplier?
Then please contact with us
Contact me:
Email:wp@cnjingganrefractory.com/sdwenping@163.com
TEL: 86-0533-4188518 / FAX: 86-0533-4188518
Rose:+86-13275332819(wechat/whatsapp number)
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