Steelmaking method through medium-frequency electric furnaces

Abstract

The invention provides a steelmaking method through medium-frequency electric furnaces. According to the steelmaking method, the electric furnace A and the electric furnace B both controlled by a medium-frequency cabinet are involved, raw material is proportioned according to the requirement, the proportioned steel material is equally distributed to the electric furnace A and the electric furnace B, the steel material in the electric furnace A is smelted at 100% power, after the set time is up, molten iron in the electric furnace A is covered with thermal insulation agents for thermal preservation, a power source of the electric furnace A is cut off through a control cabinet, then the steel material in the electric furnace B is smelted at 100% power, and tapping is carried out after the temperature in the electric furnace A and the temperature in the electric furnace B reach the set tapping temperature. When the temperature in the electric furnace A reaches the set tapping temperature earlier than the temperature in the electric furnace B, tapping is firstly carried out for the electric furnace A, and the electric furnace B is covered with the thermal insulation agents for thermal preservation. The steelmaking method is simple and convenient, the quality of produced products is stable, the electric furnaces do not need to be transformed, the utilization rate of the electric energy is high, the electricity is obviously saved, the production efficiency is improved, and the input-outputratio is high.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a method for making steel in an intermediate frequency electric furnace. Background technique [0002] The iron and steel industry is an important basic industry of the national economy and an important symbol of the country's economic level and comprehensive national strength. In the past ten years, my country's steel industry has made great progress. Since 1996, the annual output of steel has ranked first in the world, and its consumption has also ranked first in the world. The iron and steel industry has become one of my country's pillar industries, and its contribution to the country's economic growth has continued to increase. [0003] With the rapid growth of my country's economy, the constraints on resource and energy consumption have become apparent, the contradiction between energy supply and demand has become increasingly prominent, and th...

AI Technical Summary

Problems solved by technology

For a long time, defects such as long electric furnace steelmaking smelting cycle, high comprehensive energy consumption, and low recovery rate of metal materials (usually only 89%) have always existed. Today, when energy conservation and emission reduction are advocated, these high energy consumption steelmaking methods are urgently needed. Improve