Method for quickly low-consumption producing low-phosphorous special steel through converter

Abstract

The invention relates to a method for quickly low-consumption producing low-phosphorous special steel through a converter. Through applying remaining slag operation in a converter double-slag method to a single slag operation mode, slag charge and steel consumption and energy medium consumption of single slag operation are further reduced, and meanwhile, the waste gas and waste slag discharge amount in the whole smelting process is further reduced; based on the specialty of a simple and short operation flow and convenience in production organization of a single slag process, the specific low-phosphorous-grade steel smelting period is greatly shortened, and the production process controllability is remarkably improved; in addition, the operation further provides a foundation on increasing the steel scrap proportion in a raw material structure and improving the applicability of a smelting method for raw materials; and in addition, in the smelting process, through adjusting a slag ingredient structure, the reduction of furnace lining erosion and the stability of a furnace profile are favorably realized, and positive and favorable conditions are created for the stable operation of allsteel grade production process.

Description

technical field [0001] The invention relates to a method for producing low-phosphorus special steel with a converter at high speed and low consumption, and belongs to the technical field of metallurgy. Background technique [0002] How to achieve the economical effectiveness of dephosphorization in converter smelting of specific steel grades is a typical problem that has always been particularly prominent in converter smelting; on the other hand, the entire iron and steel industry is limited by resources and energy consumption and increasingly demanding on the environment. In the case of higher and higher conditions, how to realize the smelting of low-phosphorus special steel in the converter with the lowest consumption has obviously become a focus of industry attention and research. In addition to positive effects, it is more time-sensitive. [0003] At present, the mature technology that has been realized in this field and the related research that is being explored mainl...

AI Technical Summary

Problems solved by technology

However, due to the traditional understanding of its lack of dephosphorization ability and low dephosphorization efficiency, it is usually not considered as a smelting method for low-phosphorus special steel. Even if there is an attempt to smelt low-phosphorus special steel with single slag, slag A significant increase in volume consumption, a significant increase in end-point supplementary blowing rate, poor smelting stability, etc.