Introduction to the smelting knowledge of calcium silicon alloy of ferroalloy

Ferroalloy is a large category in our industry, which brings great convenience to our industrial development. There are many medium and medium-sized products in our ferroalloy industry, which play a great role in the development of our ferroalloy industry. Calcium silicon alloy is one of the products, here we would like to share the production knowledge of silicon-calcium alloy for you.

Calcium silicon is a good deoxidizer and desulfurizer, mainly used for deoxidation. Silicon-calcium alloy is a binary alloy of silicon and calcium with very little iron. With the development of continuous casting and ladle refining outside the furnace, the consumption of silicon-calcium alloys has increased rapidly. There are two production methods of silicon-calcium alloy: one-step method and two-step method.

The one-step method is to use carbon to reduce silica and lime to produce silicon-calcium alloy in an electric furnace; the two-step method is to first produce calcium carbide (or high-carbon ferrosilicon) in an electric furnace, and then add silica and coke to calcium carbide (or high-carbon ferrosilicon plus lime) produces silicon-calcium alloy in another electric furnace. One-step method is further divided into mixed feeding method and layered feeding method. The mixed feeding method is to add silica, lime and coke into the reduction electric furnace together. Simultaneously reduce CaO and SiO2 with carbon to silicon-calcium alloy. The purpose is to reduce the contact between calcium oxide and silicon dioxide to reduce the generation reaction of Cao-SiO2. The layered feeding method is to add lime and coke (the addition amount is calculated according to the reaction of calcium carbide) near the electrode, let CaO generate CaC2 as much as possible after melting, then mix silica and the remaining carbon and add it to the furnace to produce Calcium silicon alloy. There are two two-step methods, one is to produce lime and calcium carbide in one electric furnace first, and then crush the calcium carbide together with coke and silica to produce calcium-silicon alloy in another electric furnace. The first is to produce high-silicon ferrosilicon in an electric furnace, and then use high-silicon ferrosilicon as a reducing agent to reduce calcium oxide in an electric furnace to obtain a silicon-calcium alloy.

There are many products in ferroalloy. In our usual use, only by summarizing their relevant knowledge can we bring some help to the future use of our products. The above is the production knowledge of calcium-silicon alloy shared by Anyang Lishi Indurytrial. For more knowledge about calcium-silicon alloy, please pay more attention to our official website in the future.


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