Method for reducing smelting cost of converter

Abstract

The invention belongs to the technical field of converter smelting, and particularly relates to a method for reducing converter smelting cost, which comprises the following steps: adding a steel bar cropping bin on a furnace front platform, adding a vibrating screen at the lower end of the steel bar cropping bin, and adding steel bar cropping into the steel bar cropping bin by using a waste steel hopper; picking the cold hopper by using a forklift, putting the cold hopper below a vibrating screen of the steel bar cutting head bin, and starting the vibrating screen to vibrate the steel bar cutting head into the cold hopper; the steel bar cutting head is conveyed to a cold material adding opening of an argon blowing station through a forklift; after molten steel enters an argon station for temperature measurement and sampling, if the steel ladle clearance is larger than 500 mm and the temperature is larger than 1560 DEG C, the number of added steel bar cutting heads is determined according to the temperature condition. The added steel bar cutting head is directly changed into molten steel after being completely melted, materials such as oxygen, lime and dolomite do not need to be consumed, the yield is increased, the temperature of the molten steel is reduced, the refining temperature of the molten steel is stabilized within the range of 1525-1540 DEG C, temperature waste is avoided, and meanwhile stable operation of a refining furnace is facilitated.

Description

technical field [0001] The invention belongs to the technical field of converter smelting, and in particular relates to a method for reducing the cost of converter smelting. Background technique [0002] During the smelting process of the converter, the temperature control at the end point has always been an important link in the production process of the converter. However, there are many factors that affect the end temperature of converter smelting, such as molten iron temperature composition, process feeding control, process gun position control, whether there is backdrying in the process, whether there is splashing, whether scrap steel is sticky, etc. will all affect the end temperature. Due to the unstable temperature control at the end point of converter smelting, the number of furnaces with the temperature above 1560°C in the molten steel entering the argon station accounts for a large proportion. When the tapping temperature is high, the refining temperature is high...

AI Technical Summary

Problems solved by technology

When the tapping temperature is high, the refining temperature is high, and the refining furnace needs to use argon or nitrogen to stir and cool down, resulting in waste of temperature and gas, which will aggravate the secondary oxidation of molten steel and affect the quality of molten steel