Converter smelting method of high-silicon and high-phosphorus molten iron

Abstract

The invention relates to a converter smelting method for high-silicon and high-phosphorus molten iron. The molten iron with the silicon mass content of 0.6%-0.8% and the phosphorus mass content of 0.1%-0.12% is adopted for producing low-carbon steel and medium-high carbon steel. Slag charge and a slagging agent are added in batches, and lime is adopted as the slag charge; smelting of the high-silicon and high-phosphorus molten iron takes high alkalinity as a principle; in the aspects of feeding time and quantity, lance position and oxygen pressure control, slag melting and drying time reduction are taken as principles; endpoint slag is based on the principle of thorough melting and high FeO control in the slag; the converter blowing success rate of the high-silicon and high-phosphorus molten iron is effectively increased, and powerful technical guarantee is provided for stable production of the converter under the unsteady state condition.