Converter-strengthened slagging agent and preparation method and using method thereof

Abstract

The invention provides a converter-strengthened slagging agent, which is characterized in that: the converter-strengthened slagging agent comprises the following components in percentage by weight: 55 to 70 percent of poor manganese mineral powder, 15 to 20 percent of iron oxide, 2 to 5 percent of high temperature dispersant, 10 to 15 percent of lime, and 2 to 5 percent of binder. The content of MnO in the poor manganese mineral powder is 15 to 35 percent; the content of FeO in the iron oxide is 55 to 65 percent; the content of Na2CO3 in the high temperature dispersant is 80 to 90 percent; and the content of CaO in the lime is 70 to 80 percent. Due to the use of the converter-strengthened slagging agent, the slagging effect is obviously improved; the slagging time is shortened by 1 to 2 minutes; the blowing process of the converter is stable and has no re-drying and splashing phenomena; the slagging material consumption is reduced; and the service life of the converter lining is prolonged; the content of P at the terminal point of the converter is reduced by 10 to 20 percent; the blowing time of the converter is shortened by 1 to 2 minutes; the smelting cycle is shortened; the converter has no re-drying and splashing phenomena; and the consumption of iron and steel is greatly reduced by 10 kg per ton.

Description

technical field [0001] The invention belongs to the field of converter smelting, and in particular relates to a converter strengthening slag agent used in a converter blowing process and a preparation method and an application method thereof. Background technique [0002] Slag plays an extremely important role in the converter blowing process. In order to obtain molten steel that conforms to the steel composition and temperature, slag with a good slag system must be produced during the converter blowing process, and the reaction between molten steel and slag must be fully carried out to fully remove S and P. The slagging materials in the blowing process mainly include active lime and lightly burned dolomite. In addition, some slagging agents need to be added in the steelmaking process to lower the melting point of slag, increase the activity of slag, and promote the full reaction of steel slag. Fluorite (CaF2) is a good slag agent, but the erosion of fluorite to the furnac...

AI Technical Summary

Problems solved by technology

However, in the process of converter steelmaking without adding slagging agent blowing, the time for slag melting is long, and the slag will dry out in the middle period, resulting in frequent occurrence of gun sticking and splashing, and it is difficult to dephosphorize, and the phosphorus content at the end point often exceeds the standard

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