Method for melting heterogeneous cast iron in same intermediate frequency electric furnace

Abstract

The invention discloses a method for melting heterogeneous cast iron in the same intermediate frequency electric furnace, and belongs to the field of cast iron smelting. The method comprises the following steps of preparing furnace burden, equipment and technical documents; determining melting operation sequences of different material types or different brands of molten iron; determining melting process procedures of first molten iron and other molten iron; preparing materials, charging and heating for melting according to process burdening list requirements; sampling for molten iron chemicalcomposition analysis and adjustment before discharging; determining a burdening process of second molten iron according to specific conditions after discharging and pouring; supplementing the requiredmetal furnace burden into the furnace and heating for melting; performing sampling analysis and component adjustment of the second molten iron, molten iron treatment, discharging and pouring; and repeatedly performing the above steps for melting production and molten iron treatment of next molten iron. According to the method, different material types or different grades of iron castings can be obtained by smelting the molten iron in the same furnace, so that the quality of the castings is effectively stabilized, the qualified rate of the castings is guaranteed, the flow control of productionis conveniently carried out, and the smelting cost of cast iron is reduced.

Description

technical field [0001] The invention belongs to the field of cast iron smelting, in particular to a method for smelting heterogeneous cast iron in an intermediate frequency electric furnace in the same furnace, which is used for melting iron castings of different material types or brands in the same furnace in an intermediate frequency electric furnace. Background technique [0002] In terms of existing intermediate frequency electric furnace cast iron smelting technology, each molten iron can only be smelted to produce castings of the same material grade. It is relatively small, and there is often a problem that the batch of castings of the same grade and the amount of molten iron are not enough to melt a whole furnace of molten iron, which wastes the melting space in the furnace; using the same furnace of molten iron to smelt at the same time to produce castings of different materials or different grades Smelting technology is relatively rare and lacks systematic and compr...

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Problems solved by technology

[0002] In terms of existing intermediate frequency electric furnace cast iron smelting technology, each molten iron can only be smelted to produce castings of the same material grade. It is relatively small, and there is often a problem that the batch of castings of the same grade and the amount of molten iron are not enough to melt a whole furnace of molten iron, which wastes the melting space in the furnace; using the same furnace of molten iron to smelt at the same time to produce castings of different materials or different grades Smelting technology is relatively rare and lacks systematic and comprehensive research. Cast iron smelting practitioners generally only rely on production practice experience to explore and control, and cannot guarantee accurate, fast, and low-cost control of the cast iron smelting production process and the inherent quality of castings

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