Our induction melting furnace uses scrap steel to make steel castings. The materials are messy scrap steel and paint, Heavy rust. Everything. Now the problem that bothers me is too much alloy. It's mainly MnSi, which is a 2T induction furnace. The actual molten steel is usually about 2.4t. The average consumption of Mn alloy per furnace is more than 40kg. Our workpiece requires Mn content of 0.9 ~ 1.3. At present, the chemical composition after the furnace is in a reasonable range. Due to the raw material (scrap), the consumption of Mn alloy is different It's very large. The good scrap is about 30kg, and the poor one needs 50-70kg. Especially, the first furnace uses a lot of scrap. (we only start the furnace at night). I don't know what you think about the process

When the burden is the same, the first furnace takes a long time, and Mn is oxidized by SiO2, FeO and other acidic oxides. It is suggested that neutral lining be used to reduce SiO2 and rust of burden. Our two workshops, one for cast iron, use acid furnace building materials. The cast steel uses basic materials (magnesia). Acid high temperature resistance is not very good. What I want to know is whether there are operation methods for reference in the process, such as the time of adding alloy. As for raw materials, affected by the market, there is not much room for improvement

Maybe your induction furnace smelting process has great shortcomings, ferrosilicon and ferromanganese alloy can not be added in this way, ferrosilicon should also be added after deoxidation, which can reduce the amount of addition. The yield of ferrosilicon can reach 75-80% 8 minutes before tapping. If the casting requirements are high, it is best to add rare earth ferrosilicon 16 minutes before tapping.

Yiphee Electric Furnace Co.,Ltd specializes in producing induction furnace.Tel(WhatsApp):+86-13450756789, yiphee@yiphee.cn