Converter smelting method for high-silicon molten iron generated during new blow-in of blast furnace

Abstract

the invention relates to a converter smelting method for high-silicon molten iron generated during new blow-in of a blast furnace, which comprises the following steps: first, subpackaging molten iron sent by the blast furnace, wherein the qualified low-silicon molten iron is filled in a mix iron furnace for normal smelting by the converter so as to support the production of a casting machine, and the high-silicon molten iron not meeting the standards of pig iron for steel manufacturing is poured into a converter hot metal ladle in a molten iron pouring station, and only the high-silicon molten iron in one of the converters is subjected to desiliconization pretreatment. According to the invention, the problem that the smelting of the high-silicon molten iron generated during new blow-in of the blast furnace is difficult is solved; the smelting process is stable and controllable; the high-silicon molten iron generated during the early period of the new blow-in of the blast furnace is smoothly digested without affecting the normal production of a steel-melting plant, which strongly supports the new blow-in of the blast furnace and normal operation of the blast furnace after long time blowing-down; and accordingly the quick building of large balance of steel production is ensured.

Description

technical field [0001] The invention belongs to the technical field of converter steelmaking production technology in iron and steel metallurgy, and relates to a kind of high-silicon molten iron that is suitable for insufficient iron casting capacity in ironworks and digests the high-silicon molten iron produced in the initial stage of blast furnace opening by the converter smelting method, which does not meet the steelmaking pig iron standard. It is also applicable to the converter smelting method for smelting the high-silicon molten iron produced by the blast furnace shutdown inspection and repairing. Background technique [0002] The hearth temperature of the new ironmaking blast furnace is low, so a large amount of coke must be added to supplement the heat and increase the furnace temperature. During this period, the molten iron produced by the blast furnace has a particularly high silicon content, with an average silicon content of 2%, and the highest can reach more than...

AI Technical Summary

Problems solved by technology

[0009] The non-standard molten iron that does not meet the steelmaking pig iron standard is usually digested by cast iron, but this digestion method is only used under the condition that the amount of non-standard molten iron is small and the process capacity of the cast iron machine is sufficient; and the cast iron method has great environmental pollution and energy efficiency. low disadvantage