Process for producing aluminum-containing medium carbon steel through CaC2 deoxidization

Abstract

The invention discloses a control method for producing aluminum-containing medium carbon steel through CaC2 deoxidization in the steelmaking process. According to production process, in the smelting process, a deoxidization mode of combining CaC2 diffusion deoxidization and aluminum wire deoxidization is adopted, a converter tapping deoxidization principle in a converter smelting process and a slagging principle in a refining furnace smelting process are optimized, aluminum in the molten steel is regulated by feeding aluminum wires on the furnace rear of the converter, a small amount of aluminum wires is added into CaC2 in the LF converter for deoxidizing and slagging, and the aluminum in the molten steel is finely adjusted y matching with aluminum wire feeding in the LF furnace. According to the process, the converter tapping deoxidization is stable, the slagging and desulfurizing effects of the LF furnace are obvious, the cast slab quality is high, and the effect of reducing the aluminum consumption in tons of steel in the produced aluminum-containing medium carbon steel by 0.80kg is achieved. The aluminum yield is high, namely the content of average arrival aluminum in the LF furnace is 0.029 percent, and the aluminum yield is 59.5 percent. The deoxidization cost is low, namely the aluminum consumption in tons of steel is reduced by 0.8kg, the cost of CaC2 is reduced, and the deoxidization cost is reduced by 12 yuan per ton. The refining slag conditions are improved, namely the average sulfur content in the final molten steel of a refining furnace is 0.0026 percent, the desulfurization efficiency is 92.6 percent, and the cast slab quality is improved.

Description

technical field [0001] The invention relates to a steelmaking process in the field of metallurgy, in particular to a CaC 2 Deoxidation production of aluminum-containing medium carbon steel process. Background technique [0002] The deoxidation system in the smelting process is the key process for producing high-quality steel. As the most common active deoxidizer in the steelmaking process, aluminum is widely used in major steelmaking plants. Especially in the production of aluminum-containing medium-carbon steel, aluminum is used as a deoxidizer and also as one of the alloying elements in molten steel, resulting in a consumption of about 2kg of aluminum per ton of steel in the production process of aluminum-containing medium-carbon steel, making production The cost increases, reducing the economic benefits of steel manufacturers. With the fluctuations in the steel market, reducing production costs has become the main way for various steel companies to increase their profit...

AI Technical Summary

Problems solved by technology

However, there is a contradiction between the need for aluminum and the reduction of the use of aluminum in aluminum-containing medium carbon steel. In order to break through this restrictive link, a CaC that fully combines diffusion deoxidation and precipitation deoxidation in the smelting process is provided. 2 The process of producing aluminum-containing medium-carbon steel through deoxidation and solving the outstanding problem of high aluminum consumption during the production of aluminum-containing medium-carbon steel have become urgent technical problems in this field.

Images