Novel knotted reactor (KR) molten iron desulfurization and temperature reduction process

Abstract

The invention relates to a novel knotted reactor (KR) molten iron desulfurization and temperature reduction process, which belongs to a molten iron pretreatment work procedure and aims at solving the problems of sputtering, high consumption and the like caused by difficult converter melting operation when the charged molten iron temperature is high. The process comprises the following steps that: sintering ore with the iron content being 50-57 percent is crushed and is processed into sintering ore powder with the granularity within 3mm; the sintering ore powder is conveyed to a KR desulfurization work procedure, and then, high-pressure nitrogen gas is used for conveying the sintering ore powder into a KR desulfurization material storage tank; desulfurization agents on the molten iron surface are involved into molten iron for mixed desulfurization through the rotary stirring of a stirrer; the temperature is measured after the molten iron desulfurization completion, and when the molten iron temperature exceeds 1300 DEG C, the sintering ore powder is used for temperature reduction operation. Under the stirring effect of the stirrer, the added sintering ore powder is continually sucked into the molten iron through the involving and suction effects and takes reaction with the molten iron, so the effect of reducing the molten iron temperature is reached. The novel KR molten iron desulfurization and temperature reduction process has the advantage that the process is simple, and after the novel KR molten iron desulfurization and temperature reduction process is applied, the KR molten iron desulfurization and temperature reduction functions are smoothly realized.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy and steelmaking, and in particular relates to a molten iron pretreatment process. Background technique [0002] The temperature of molten iron has a great influence on the operation of the converter. First, if the molten iron is too high (≥1300°C), the converter will easily cause splashing, which will affect the consumption of steel materials and other indicators, which will have a great impact on the cost completion. Secondly, if the temperature of molten iron is too high, the amount of cold material added to the converter will be large. According to statistics, it can reach up to 10 tons of sinter. In this case, the converter cannot use automatic steelmaking, which will affect the increase in the proportion of intelligent steelmaking. Since 2011, the temperature of molten iron entering the steelmaking plant of Shandong Iron and Steel Laiwu Iron and Steel Group has fluctuated gr...

AI Technical Summary

Problems solved by technology

[0002] The temperature of molten iron has a great influence on the operation of the converter. First, if the molten iron is too high (≥1300°C), the converter will easily cause splashing, which will affect the consumption of steel materials and other indicators, which will have a great impact on the cost completion

Secondly, if the temperature of molten iron is too high, the amount of cold material added to the converter will be large. According to statistics, it can reach up to 10 tons of sinter. In this case, the converter cannot use automatic steelmaking, which will affect the increase in the proportion of intelligent steelmaking.