1. The thickness of the silicon ferro ingot should not be too thick to reduce the degree of segregation of the silicon content in the fe silicon. Strictly control the silicon content of ferrosilicon, not too low.
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2. Control the aluminum, phosphorus and calcium content of high carbon ferro silicon. For this purpose, better raw materials must be used, especially high-ash coke cannot be used to reduce the aluminum and phosphorus content. In order to reduce the calcium content of ferrosilicon, it should be minimized during smelting. Add lime.
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3. Accelerate the cooling of fe si liquid, prevent iron ingot segregation, and reduce the accumulation of harmful elements
4. Reduce the content of harmful impurities P, ca, etc.
