Medium Frequency Smelting Furnace Melting Process Requirements

Medium Frequency Smelting Furnace Melting Process Requirements 

According to the characteristics of the crucible materials used, the melting process of the medium-frequency induction furnace can be divided into two types: the partial alkali crucible smelting method and the acid crucible smelting method. Meta-alkali crucible smelting method can be divided into the melting method and the oxidation method. The acid crucible smelting method is only limited to the melting method. 

Due to the low refractoriness of the crucible material, the oxidation process can not be carried out. The alkaline crucible smelting method is the most commonly used smelting method. It can be used for smelting high alloy steel, stainless steel plate, wear-resistant steel, tool and mold steel, electric heating aluminum alloy, precision alloy, corrosion-resistant aluminum alloy, high-temperature alloy, and other types. The application scope of the acid crucible smelting method is small, and it is only limited to smelting medium carbon steel, chromium manganese nitrogen wear-resistant steel, high-speed tool steel, high carbon steel mold steel, wear-resistant steel, etc. Smelting steel must have high silicon content, without partial alkali crucibles such as Al, Ti, B, Zr, and other oxidizable elements. The smelting method is the way to conduct smelting in crucibles built with basic refractory insulation materials or tied. 

According to the difference of applied raw materials, it is further divided into three smelting methods: the new upgraded material melting method, the partial return material melting method, and the oxidation method.

(1) The new upgraded material melting method applies the new material configuration to smelting all the returned waste. This type of smelting method is applicable to the production and manufacture of key commodities with high-quality standards. Because all new materials are used and cannot be matched with returned materials, the cost of raw materials is high and the corresponding cost is high.

(2) A part of the seasoning for smelting with the return material melting method consists of the new material and the return material. Among them, the structural characteristics and blending amount of the returned materials have certain harm to the smelting quality of the products. The total number of returned materials shall be effectively allocated according to the use of the equipment. The aluminum alloy raw material can be recycled by using the returned material, which can save energy and control costs.

(3) The raw materials of the oxidation smelting process are mainly carbon waste steel and alloy structural steel waste steel. Smelting shall be carried out according to blowing oxygen to help melt during the melting period and blowing oxygen to reduce carbon and restore deammonia after cleaning. The feature of this method is that carbon waste steel and alloy structural steel waste steel can be recycled. Suitable for smelting carbon steel castings, high alloy steel, etc. In addition, the use of oxidation can complete the dephosphorization and carburization of molten steel and reduce the phosphorus and carbon components in steel.