Short-process steelmaking method based on converter

Abstract

A short-process steelmaking method based on a converter is carried out according to the following steps of a, preparation of primary smelting molten steel, b, preparation of a temperature increasing agent, c, converter operation, d, operation after the converter, and e, treatment outside the converter. According to the short-process steelmaking method based on the converter, aiming at the characteristics of existing converter steelmaking, the advantages of long-process steelmaking of the converter and short-process steelmaking of an electric-arc furnace are taken into account simultaneously, another way is found, the primary smelting molten steel is produced by adopting an electromagnetic induction heating furnace, the converter is utilized to conduct secondary smelting operation on the primary smelting molten steel, meanwhile, a certain amount of the temperature increasing agent is added into the converter bottom according to the temperature of the primary smelting molten steel put into the converter and the adding amount of steel scrap into the converter, in the premise of ensuring heat balance of a converter system, and the molten steel yield and quality, the converter omits steelmaking through blast furnace molten steel, and whole scrap steel smelting through the converter is achieved. By adopting the short-process steelmaking method based on the converter, the molten steelyield and quality can be ensured in the premise of normal production, and meanwhile, the purposes of reducing pollution and reducing emission are achieved.

Description

technical field [0001] The invention relates to a method for iron and steel smelting, in particular to a short-process steelmaking method based on a converter, which belongs to the technical field of iron and steel smelting. Background technique [0002] The iron and steel industry is one of the basic industries of industrialized countries and the material basis for the development of the national economy and national defense construction, and its position is very important. There are two different processes in the current steelmaking method, namely, the long-process steelmaking process of the converter and the short-process steelmaking process of the electric arc furnace. The difference between the two processes is that the former uses molten iron produced from ore and coal coke as raw material, which has a short smelting cycle, high production efficiency, and low manufacturing cost per ton of steel. The disadvantage is that the production of molten iron involves sintering,...

AI Technical Summary

Problems solved by technology

The difference between the two processes is that the former uses molten iron produced from ore and coal coke as raw material, which has a short smelting cycle, high production efficiency, and low manufacturing cost per ton of steel. The disadvantage is that the production of molten iron involves sintering, pelletizing, and blast furnace processes. High emissions and environmental pollution; the latter uses scrap steel that has been recycled and reused after crushing, sorting and processing as raw materials, does not involve other processes, and has less carbon emissions and less environmental pollution. The disadvantage is that the smelting cycle is long and the production Low efficiency and high manufacturing cost per ton of steel