Manufacturing method of heat increasing and component controlling briquette used in steel manufacturing process

Abstract

There is provided a method of producing a briquette for increasing the amount of heat and the control component in the process of producing molten steel for the steel making process by purifying the silicon-containing waste slurry. The method comprises a main separation step: mixing water into an initial waste slurry comprising silicon (Si), silicon carbide (SiC), water-soluble oil and iron (Fe) at a first mixing ratio, and separating water-soluble oil and water from the initial waste slurry; a briquetting ste: adding adhesive to the Si-containing SiC slurry obtained by separating the water-soluble oil and water from the initial scrap in the main separation step, containing Si-SiC pulp, and then containing Si-SiC slurry molded into billet. The pellet constituting the initial waste slurry has a volume median diameter (Dv50) of 1 micron or more.

Description

technical field [0001] The present invention relates to a method of manufacturing heat-increasing and composition-controlled briquettes for use in the production of molten steel in iron and steel manufacturing processes, comprising purifying and briquetting spent slurry containing silicon (Si) and silicon carbide (SiC). More specifically, the present invention relates to a method of manufacturing a heat-increasing and composition-controlled briquette used in the steel manufacturing process, which is capable of purifying silicon-containing waste slurry generated during the manufacture of semiconductor or solar cell wafers, preventing fires, Oxidation of silicon is effectively suppressed, and a briquette in block form is easily molded, and the present invention relates to a method of manufacturing a heat-increased and composition-controlled briquette as a briquette raw material for producing steel. Background technique [0002] During steel manufacturing, impurities including ...

AI Technical Summary

Problems solved by technology

In order to produce the added ferrosilicon, a large amount of silicon is required, which mainly depends on imports, resulting in higher prices

Due to this, there is a problem that the overall steel manufacturing cost increases

However, since the price of silicon used as a heating agent is high, there is a problem that the overall steel manufacturing cost increases

[0013] First of all, during the drying process of recycling silicon-containing waste slurry, there is a possibility of causing a fire due to the reaction of silicon sawdust components and moisture

[0014] Second, because the overall surface area of ​​silicon increases and the area in contact with oxygen increases, the amount of oxide of silicon increases

[0015] Third, the strength of the briquette molded in the shape of a block is reduced, and the molded briquette is easily broken

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