Raw material pretreatment

Coarse - grained, containing silicate minerals, the filter bags should have abrasive resistance.

Smelting

During the smelting process, the dust temperature can reach a high level of 300 - 800°C and contains sulfides.

Converting and refining

The dust has a small particle size and is prone to secondary dust - raising. Fluorine - containing dust is easy to absorb moisture and form acidic gases.

Electrolysis

In the aluminum electrolysis process, anode carbon blocks use asphalt as an adhesive. During this process, a large amount of asphalt fumes will be emitted, which are mixed with high-concentration carbon powder and water vapor. This is likely to cause equipment blockage due to its high viscosity.