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Molten iron pretreatment slag skimming process

A technology for hot metal pretreatment and slag removal, which is applied in the field of hot metal pretreatment and slag removal in steelmaking plants and ironmaking plants, and can solve problems such as production, use, and environmental impact on workers' health, high labor intensity, and easy occupational diseases. , to shorten the slag removal time, improve the operation efficiency and reduce the loss of molten iron

Inactive Publication Date: 2009-02-25
吴兴伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high cost, poor slag gathering effect, high labor intensity of workers, and environmental pollution, this kind of material is easy to cause occupational diseases and other shortcomings, which has a great impact on production, use, environment and workers' health.

Method used

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Embodiment Construction

[0008] The molten iron pretreatment slag scraping process of the present invention is realized in this way. The molten iron pretreatment slag scraping process is as follows: the compressed air with a pressure of 0.6Mpa is sprayed through the injection device, and when the compressed air enters the molten iron ladle 2 meters below the molten iron surface When the depth is deep, the gas floats and turns the molten iron, causing the molten iron surface to produce a boiling surface. Due to the generation of the molten iron boiling surface, the initial state of the molten iron slag remaining on the surface of the molten iron ladle should be changed. For example, the boiling surface of the molten iron crowds the molten iron slag, causing the molten iron slag to aggregate. .

[0009] The installation of breathable bricks is adopted. The breathable bricks have two parts: seat bricks and breathable bricks. When laying the ladle, the base bricks are laid on the side of the ladle, and a l...

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PUM

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Abstract

The invention relates to a slag-raking technology of pre-treatment for molten iron, belonging to the refining field of pig iron. The invention is characterized in that: the slag-raking technology of pre-treatment for molten iron comprises the following steps: compressed air with the pressure 0.6MPa is blown by a blowing device, when the compressed air reaches 2 meters under the liquid level of the molten iron in the ladle, the air rises up to turn over the molten iron, thus generating boiling surface on the liquid level of the molten iron, due to the generation of the boiling surface of the molten iron, the initial state of the molten iron slag remained on the surface of the ladle is changed, for instance, the boiling surface of the molten iron extrudes the molten iron slag, resulting in polymerization of the molten iron slag. The invention can remove dead space of slag-raking, reduce actions of slag-raking, shorten time of slag-raking, improve work efficiency, reduce loss of the molten iron, and lower the production cost. A ladle with air brick internally mounted or externally mounted is the ideal facility for the pre-treatment of the molten iron.

Description

technical field [0001] The invention belongs to the field of pig iron refining, and relates to a slag removal process suitable for hot metal pretreatment in steel plants and iron plants. Background technique [0002] Currently. Domestic converter steelmaking uses molten iron as raw material, which contains high sulfur. Using this molten iron to directly make steel will cause large consumption of raw materials, long smelting time, and reduce furnace order problems. Therefore, high-sulfur molten iron should be pretreated. , Hot metal pretreatment equipment is an important equipment for reducing the sulfur content of molten iron in the metallurgical industry, and it is a necessary equipment to ensure the production of high value-added products in steel plants and iron plants. At present, the traditional method of slag accumulation in molten iron pretreatment slag removal operation is to use a slag accumulation material containing silicon element. Due to the high cost, poor sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/072
Inventor 吴兴伟
Owner 吴兴伟
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