Powder spraying desulfuration mechanism for performing RH (Ruhrstahl and Heraeus) on molten steel

Abstract

The invention provides a powder spraying desulfuration mechanism for performing RH (Ruhrstahl and Heraeus) on molten steel. The powder spraying desulfuration mechanism is composed of a desulfurizing agent delivery system and a spraying system, wherein the desulfurizing agent delivery system comprises a desulfurizing agent storage bin, a first rotary feeder, a physical strength sending tank, a receiving bin, a blowing assisting device, a spraying tank, a weighing device, an impulse type fluidifying device, a nitrogen module and an argon module, and the spraying system comprises a spray gun lifting mechanism, a spray gun and a vacuum groove. By virtue of calculating the resistance in the delivery process, the desulfuration device is specifically and additionally provided with the blowing assisting device, the stable transportation of a desulfurizing agent is guaranteed, a pipeline is easy to plug; and meanwhile, the position of the powder spraying of the spray gun is adjusted, the position of the spray gun is adjusted according to the pressure in the vacuum groove, the powder spraying penetrating power is enhanced, and the deep desulfuration purpose is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a high-efficiency deep desulfurization device used for RH refining low-sulfur steel, that is, a powder spraying desulfurization mechanism for RH molten steel refining. Background technique [0002] Normally, sulfur is a harmful element in steel, which seriously affects the performance of steel. In recent years, users’ demand for ultra-low sulfur steel ([S]≤0.0030%) is increasing. Some high-grade pipeline steels even require sulfur The content is less than 0.0015%. For acid-resistant pipeline steel, the sulfur content will affect the impact toughness of the steel, and will seriously deteriorate the HIC (Hydrogen Induced-Cracking) and SSCC (Sulfide Stress Corrosion Cracking) performance of the pipeline steel. [0003] In order to achieve better desulfurization, people have developed the RH powder injection technology, which can be divided into RH-PBJ method, RH-PB(OB) method and ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a stable, efficient, low-consumption, highly automated powder-spraying desulfurization mechanism for RH molten steel refining to solve the problems of unstable spraying speed and desulfurization in the existing powder-spraying technology described in the background technology. It is difficult to control the amount of agent used, the injection speed is difficult to control, and the desulfurization efficiency is low.

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