Smelting method for retaining hot dreg of converter

Abstract

The invention discloses a smelting method for retaining hot dreg of a converter, which mainly solves the technical problem in the prior art that retained hot dreg of the converter is easy to splash in the early converter converting period and the retaining amount of hot dreg of the converter is hard to control accurately. According to the technical scheme disclosed by the invention, the smelting method for retaining hot dreg of the converter comprises the following steps: a, pouring dreg: after tapping of the converter, pouring dreg, and returning the converter to zero degree after 30-50% of the total weight of dreg is poured; b, splashing dreg to protect the converter: adding a certain amount of caustic calcined magnesite balls and caustic calcined dolomite into dreg of the converter to splash dreg to protect the converter; c, adding raw dolomite or limestone into the converter for mixing dreg, and after mixing the dreg, adding molten iron and waste steel into the converter; and d, adding a converter dreg making material into the converter and then converting the molten iron, the waste steel and the converter dreg making material in the converter. Compared with conventional smelting process without retaining dreg, the converting process is stable and the consumption of the converter dreg making material is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy converter smelting, in particular to a smelting method for retaining converter hot slag. Background technique [0002] Environmental protection, energy saving and consumption reduction and production cost reduction have become the main tasks for the survival and development of iron and steel enterprises. Slagging materials such as lime, light-burned magnesium balls and light-burned dolomite need to be added to the converter smelting process to remove harmful elements in steel and protect the furnace by splashing slag. In the traditional process, all the slag is poured out after the slag splashing to protect the furnace, and then the next furnace operation is carried out. If this part of slag is left and used as slagging material for the next furnace, on the one hand, the physical heat of this part of slag can be utilized; on the other hand, the amount of slag-making material add...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a smelting method for retaining converter hot slag, which mainly solves the technical problems in the prior art that the converter hot slag is easily splashed in the early stage of converter blowing and the amount of converter hot slag is difficult to accurately control.

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