At CanSi Global, our production methodology represents the pinnacle of excellence in industrial material manufacturing. We maintain an unwavering commitment to quality, efficiency, and sustainability throughout our process.
Our process excellence is built on three core strengths:
We source high-purity quartzite (SiO₂ content: 98%–99%) and select carbonaceous reducing agents such as petroleum coke, charcoal, and cleaned coal.
Pre-treated raw materials are fed into a submerged arc furnace operating at temperatures between 1800 and 2000℃ in specific proportions. Electrical energy is supplied to the furnace through electrodes, initiating a chemical reaction among the raw materials. The silicon dioxide in the quartzite is reduced by carbon to form crude silicon, represented by the equation SiO₂ + 2C = Si + 2CO↑
The crude silicon is transferred to a refining furnace, where oxygen is used to eliminate the primary impurities: iron, aluminum, and calcium.
Once the refined liquid silicon metal reaches the required purity, it is poured into a mold for cooling. After solidification, it is processed into silicon metal lumps (approximately 10-100mm, 90%min) or according to the customers’ required size.
1 MT per woven bag or tailored to specifications.
High-purity dolomite, ferrosilicon, and fluorite powder are carefully selected and prepared.
Dolomite is fed into the vertical pre-heater of a rotary kiln, where it undergoes calcination, forming calcined dolomite (MgO·CaO) and CO₂ gas.
The cooled fine powder of calcined dolomite is mixed with ferrosilicon and fluorite powder, which acts as a catalyst. The mixture is then pressed into ball shapes for the next reduction stage.
The pressed balls are loaded into heat-resistant stainless-steel reduction tanks. In a reduction furnace (1,200–1,250°C, 1.33 Pa vacuum), ferrosilicon reduces MgO in the calcined dolomite, generating magnesium vapor and calcium silicate by-products via the reaction:
2MgO + Si → 2Mg↑ + SiO₂
Crude magnesium is refined in a furnace with flux to remove impurities such as iron, silicon, and aluminum. The purified liquid magnesium is then poured into molds to form ingots. After cooling, the ingots are packed as 1MT / 1.25MT per magnesium pallet.
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