Method for melting high-alumina weakly magnetic metal material by medium frequency induction furnace

Abstract

The invention relates to a method for melting high-aluminum weak magnetic metal raw materials in an intermediate frequency induction furnace. When the intermediate frequency induction furnace continuously melts high aluminum weak magnetic metal raw materials, after all the high aluminum weak magnetic metal raw materials in the furnace are melted into liquid molten steel, When the temperature reaches 1530°C-1540°C, add silicon-calcium alloy (Ca31Si60) to the liquid surface, and the weight Q of silicon-calcium alloy added to each furnace is: Q=T×(M-G)×1000×0.617, where M is a certain furnace The content of the Al element in the melted high-aluminum weak magnetic metal raw material, G is the average value of the aluminum content obtained by melting the same high-aluminum weak magnetic metal raw material in the previous furnace through sampling analysis before being released from the furnace, and T is the aluminum content melted by the furnace The weight of this kind of high aluminum weak magnetic metal raw material. The method for melting high-aluminum and weak-magnetic metal raw materials in the medium-frequency induction furnace of the invention is easy to operate, and can significantly improve the service life of the furnace lining of the medium-frequency induction furnace when melting high-aluminum and weakly magnetic raw materials.

Description

Technical field [0001] The invention relates to a method for melting high-aluminum weak magnetic metal raw materials in an intermediate frequency induction furnace. Background technique [0002] When the medium frequency induction furnace is melting high-aluminum weak-magnetic metal raw materials, the melting capacity of different parts is different. At the furnace mouth, on the one hand, because the molten steel surface is in contact with the atmosphere, on the other hand, the heating capacity of the coil is weakened, resulting in a low temperature at the furnace mouth. Area. Therefore, when the intermediate frequency induction furnace continuously melts the weak magnetic metal raw materials with high aluminum content, it is more difficult to melt. At the same time, due to the continuous oxidation of the Al element during the melting process, a large amount of Al is formed. 2 O 3 Inclusions, Al in the high temperature zone 2 O 3 Basically it can be melted into the molten pool, a...

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Problems solved by technology

Therefore, when the intermediate frequency induction furnace continuously melts the weak magnetic metal raw material with high aluminum content, it is difficult to melt. At the same time, due to the continuous oxidation of Al element during the melting process, a large amount of Al is formed. 2 o 3 Inclusions, Al in the high temperature region 2 o 3 Basically, it can be melted into the molten pool, and in the low temperature area of ​​the furnace mouth, due to Al 2 o 3 The melting point is high, and it is continuously precipitated and adhered to the wall of the intermediate frequency induction furnace. If one furnace after another is continuously melted, the inner diameter of the furnace wall will gradually become smaller, and at the same time, due to Al 2 o 3 The melting point is high, the material is hard, it is difficult to remove by mechanical means, and the furnace lining may be damaged. In the end, because the furnace mouth becomes smaller, the furnace is forced to stop and replace the furnace lining, which shortens the life of the furnace lining

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