Single-converter double-steel smelting technology for BOF converter

Abstract

The invention discloses a single-converter double-steel smelting technology for a BOF converter. Secondary tapping of the converter is achieved through converter equipment improving and technology innovating. The following technical scheme is adopted and includes that technological parameters of a tilting motor of a converter body are optimized, and the slag discharging amount of the converter is controlled; a converter converting technology is optimized, the slag components are improved, and the rephosphorization rate is reduced; a slag blocking cap is designed, slag blocking in the early period is strengthened, and the slag discharging amount of a steel ladle is reduced; the material and the shape of a slag blocking plug are adjusted, and the problem that the hit rate is not high is solved; a double-ladle-position ladle carrying trolley is designed, and therefore the problem that 100 t molten steel is subjected to tapping to two 50 t small steel ladle carrying trolleys is solved; and after a double-ladle-position ladle carrying trolley steel ladle argon blowing device is completed, double ladles have the argon blowing stirring function. The single-converter double-steel smelting technology for the BOF converter has the beneficial effects that a brand new converter single-converter double-steel steelmaking technological route is achieved and is created for the first time for converter steelmaking in the present world; the average rephosphorization amount of the steel ladles is rigidly controlled to be 0.0017% and reaches the best level in the same domestic industries; and the requirement for small batch contracts of clients is met, and the steelmaking cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of steelmaking technology, and specifically discloses a BOF converter single-furnace double-steel smelting process, that is, a method for producing two different steel types by tapping in a single furnace. Background technique [0002] In the modern iron and steel industry, converter steelmaking is more and more favored by modern steelmaking enterprises due to its many advantages such as energy saving and environmental protection, high quality and low consumption, high efficiency and stability. In the face of complex variety contracts, on the one hand, how to give full play to the advantages and potential of converters in the rapid conversion of high-quality steel to special steel, and break through the production bottleneck of the mismatch between small batch contracts and converter capacity, so that a converter with a tapping capacity of 100t can meet 50t The production demand of the contract quantity is t...

AI Technical Summary

Problems solved by technology

Optimize the process parameters of the furnace body tilting motor to control the amount of slag lowered by the converter; optimize the blowing process of the converter to improve the composition of the slag and reduce the phosphorus return rate; design the slag blocking cap by itself to strengthen the early slag blocking and reduce the amount of slag lowered by the ladle; the slag blocking plug Adjust the material and shape to solve the problem of low hit rate; design a double ladle ladle trolley to solve the problem of tapping 100t molten steel to double ladles (two 50t small ladles) ladle trolley; perfect double ladle After the argon blowing facility for the ladle on the ladle trolley, the double ladle has the function of argon blowing and stirring

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