The main raw material for smelting ferrosilicon is silica, which contains about 98﹪ silicon dioxide. Silicon dioxide is very stable, and the affinity between silicon and oxygen is very strong, and not easy to separate. Production to remove the oxygen from the separation of silica, the use of high-temperature conditions in the mineral heat furnace to coke in the carbon capture of carbon dioxide in the oxygen, and the higher the temperature, the ability of carbon capture of oxygen is enhanced. This is because under high-temperature conditions, carbon-to-oxygen binding capacity than silicon-to-oxygen binding force.
Can be seen at high temperatures with carbon, silicon dioxide is unstable, then the oxygen in the silicon dioxide and carbon react, generating gaseous carbon monoxide, through the material layer from the mouth of the furnace to escape. After the oxygen in the silicon dioxide is taken away by carbon, the remaining silicon and iron form ferrosilicon. Which has a certain amount of silicon and iron to generate compounds, to accelerate the reaction, the electrode should be inserted deeper into the charge to increase the furnace temperature, expanding the crucible area, and at the same time should increase the permeability of the material surface, so that carbon monoxide gas escapes as soon as possible. If you take Zha breathable eye, pounding furnace and other measures, are conducive to carbon dioxide and silicon reaction accelerated, so that ferrosilicon faster generation.
Because of the smelting of ferrosilicon and steel chips and iron elements, the reduction of silica reaction is very easy to carry out, so the reduction of silicon and iron out of the formation of ferrosilicon also improves the conditions of the reduction process.
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