A method for increasing the molten iron ratio of converter and reducing smelting cost

Abstract

The invention discloses a method for reducing the smelting cost by improving the molten iron ratio of a converter. The advantages of low price and stable quality of molten iron are used, the total recovery amount of scrap steel self-made in a company is calculated and the steel making molten iron ratio of the converter is improved to reduce the cost of a metal material entering the converter, excess heat brought by the molten iron is used, and the appropriate proportion of the molten iron entering the converter, slag residual and reducing operation, converter heat balance, converter slagging auxiliary material substitution and smelting process dephosphorization control are researched to reduce the converter steel and slag cost and the medium cost in order to realize negative energy steel making, energy saving and emission reduction.

Description

technical field

[0001] The invention belongs to a steelmaking process in the field of metallurgy, and in particular relates to a steelmaking method for reducing smelting costs. Background technique

[0002] At present, the molten steel ratio of converters is about 80-85%. The converters use a large amount of purchased steel scrap. The quality of scrap steel fluctuates greatly, and the price of purchased scrap steel is relatively high. On the contrary, the price of iron ore continues to fall, and the price of molten iron is low and the quality is stable. According to the current market situation, how to make full use of the advantages of molten iron, avoid using a large amount of purchased scrap steel, ensure the stability of the process and reduce the cost of smelting, and become a steel mill. important research topic. Contents of the invention

[0003] The purpose of the present invention is to provide a steelmaking method, fully utilizing the advantages of stable molten...

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