A desulfurizing process

A desulfurization process and desulfurization agent technology, applied in the field of desulfurization in steelmaking, can solve the problems of desulfurization agent retention, desulfurization agent bonding, and affecting desulfurization effect, so as to achieve improved desulfurization efficiency, low sulfur after desulfurization, and solve the problem of poor desulfurization effect Effect

Inactive Publication Date: 2009-09-16
CHINA 19TH METALLURGICAL CORP CHENGDU CONSTR +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the desulfurizer is added to the molten iron tank first, it cannot be stirred, so that the desulfurizer stays at the bottom of the tank and cannot react
If all the desulfurizing agent is added during stirring, the desulfurizing agent will easily bond with the molten iron, so that the desulfurizing agent cannot fully react in the molten iron, thus affecting the desulfurization effect

Method used

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  • A desulfurizing process

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Embodiment 1

[0016] Embodiment 1 adopts the inventive method to carry out desulfurization test

[0017] Carbide, lime, fluorite, soda ash and other raw materials are sent to fine crushing by belt conveyor after primary crushing, and the iron impurities of each raw material are removed by iron remover, and the proportion by weight is: calcium carbide 35%, lime 55%, fluorite 5%, soda ash 5%, put into the ball mill from the disc feeder, and the ball mill (mainly steel balls and steel forgings in the ball mill) is ball milled until the particle size is ≤100 mesh ≥90% (that is, the particle size of the desulfurizer is all less than 1mm, Wherein less than 0.154mm greater than 90%) for future use, moisture less than 0.1%, for future use.

[0018] Desulfurization according to the amount of 30kg / t iron added, the specific desulfurization process is as follows:

[0019] 1) Out of molten iron (add 60% desulfurizer in the iron gutter)

[0020] The molten iron flows directly from the blast furnace in...

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Abstract

The invention relates to a desulfurization process, pertaining to the field of steel-smelting desulfurization technology. The technical problems the invention object to resolve is to provide a new desulfurizing agent to overcome the defect of bad desulfurization effects of the prior process. The inventive desulfurizing process includes: in the furnace tapping process, adding 55-65% of desulfurizing agent in the iron melt groove, after the tapping of the iron melt, in the desulfuration platform, mixing in the iron melt tank and adding 35-45% of the desulfurization agent. The inventive desulfurizing process can resolve the problem of ultrahigh sulfur content in the cast iron, wherein, the maximum desulfurization efficiency is 98%.

Description

technical field [0001] The invention relates to a desulfurization process, which belongs to the technical field of steelmaking desulfurization. Background technique [0002] The coal-based direct reduction method is a new process with short process, no pollution and conforms to the circular economy model. It is the latest smelting technology in the world after the blast furnace method and natural gas method. Sichuan Longmang Mining and Metallurgy Co., Ltd. adopts this process to process 70,000 tons of vanadium-titanium iron concentrate annually, with an annual output of 60,000 tons of direct reduced iron from vanadium-titanium iron concentrate, 16,300 tons of titanium-rich slag, 1,500 tons of vanadium slag, by-products 40,000 tons of iron. Because the original sulfur of Hongge vanadium-titanium magnetite is relatively high (the average mass fraction of sulfur before desulfurization is 0.27%), the company adopts injection desulfurization, and uses mixed air as the injection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
Inventor 邱勇
Owner CHINA 19TH METALLURGICAL CORP CHENGDU CONSTR
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