Steelmaking method for increasing ratio for scrap steel to enter furnace

Abstract

The invention discloses a steelmaking method for increasing ratio for scrap steel to enter a furnace. The steelmaking method for increasing the ratio for the scrap steel to enter the furnace includesthe steps of material adding, blowing and tapping, wherein before material adding, a device is transformed, the volume of a scrap steel bucket is increased by 4-6 cubic meters; a crown block for adding the scrap steel works in a speed decreasing manner, and a magnetic disk of the crown block is in an oval shape; the scrap steel and iron blocks are adopted as raw materials, the scrap steel comprises scrap steel pressed blocks and scrap steel spray rim charge, the scrap steel pressed blocks are placed on the inner side of the scrap steel bucket, and are sequentially arranged, and the scrap steelspray rim charge is used for gap filling; before tapping of a mixed iron furnace, firstly the scrap steel pressed blocks and the scrap steel spray rim charge are added into ladle; the scrap steel pressed blocks in the ladle are baked, and it is guaranteed that the tapping temperature is in balance; and the adding amount of the iron blocks is 45-65 kg / t, and the adding amount of the scrap steel is45-55 kg / t. According to the steelmaking method for increasing the ratio for the scrap steel to enter the furnace, the adding proportion of self-produced scrap steel and scrap steel purchased from the outside is increased in a multi-means and multi-method manner. According to the steelmaking method for increasing the ratio for the scrap steel to enter the furnace, on the premise that the steelmaking quality is guaranteed, the scrap steel charging proportion is increased, and therefore the scrap steel ratio is increased, consumption is reduced, cost is reduced, and benefits are increased.

Description

technical field [0001] The invention relates to the field of steelmaking technology, in particular to a steelmaking method for increasing the ratio of steel scrap into furnace. Background technique [0002] With the increasing shortage of energy and resources in the world, the metallurgical industry pays more and more attention to the recycling of non-renewable resources such as coal and ore. Metallurgical enterprises are high-energy-consuming enterprises, and their energy consumption accounts for about 10% of the national energy consumption and 15.25% of the industrial sector's energy consumption. Among them, converter steelmaking (converter steelmaking) is a common steelmaking method in metallurgical enterprises. It uses molten iron, scrap steel, and ferroalloy as the main raw materials. The steelmaking process is done in a converter. According to the refractory material, the converter is divided into acidic and alkaline; according to the position where the gas is blown ...

AI Technical Summary

Problems solved by technology

At present, the converter usually cannot achieve the scrap steel capacity it should have. Considering the improvement of economic effect and the reduction of energy consumption, it is necessary for the converter to achieve and greatly increase the scrap steel ratio.