Keywords: control, temperature, molten steel, furnace, furnace lining,

　　1. control the amount of subsequent burden added each time, and adopt the feeding method of adding a small amount and many times each time, so as not to reduce the temperature of molten steel too much and cause crusts of molten steel in the furnace.
　　2, observe frequently and tamper frequently to prevent burden & ldquo; Building shed & rdquo;. The temperature of the metal liquid in the medium frequency induction furnace is too high, the residence time is too long, and the impact during the construction of the shed will damage the furnace and shorten the life of the furnace lining. Some data mention that 3 t induction furnace lining melts gray cast iron containing 3.5 percent carbon. when each furnace is operated at a high temperature of 1500 degrees celsius for 20 min, the furnace age under normal conditions is 400 heats, and when each furnace is operated at a high temperature of 1550 degrees celsius for 20 min, the furnace age under normal conditions will be reduced to 240 heats, with a reduction rate of 6o%. Therefore, in the smelting operation, the use of a short time before pouring to raise the temperature and the rest of the time to keep the iron liquid at a lower temperature can reduce the erosion of high temperature iron liquid on the furnace lining, extend the service life of the furnace lining, reduce power consumption.
　　3, give full play to the role of slag, from the beginning of the melting period to strengthen the slag-making operation, often check whether there is a bare liquid surface, so that it covers well. During smelting, the medium frequency furnace slag can isolate the molten steel from the atmosphere, protect the molten steel and reduce air pollution. Reduce the effect of 0, N and H in the atmosphere on molten steel, reduce the oxidation, nitriding and volatilization of alloy elements and reduce the absorption of hydrogen by molten steel, so that the deoxidation and purification time of molten steel can be reduced. High temperature molten steel can reduce the radiation heat loss under the slag layer coverage and play a role in heat preservation of molten steel.

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