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Bottom blowing method for KR method desulfurizing tank

A pressure and front slag technology, applied in the field of KR method desulfurization tank bottom blowing, can solve the problems of not adapting to the production mode and fast-paced production situation, difficult to meet the low-sulfurization requirements of varieties, and not having enough time to calm down and remove slag, and achieve the goal of promoting the essence The effect of sexual improvement, promotion of technical level, and low investment

Inactive Publication Date: 2009-06-03
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current pure KR desulfurization method, also known as mechanical agitation desulfurization, is not suitable for the current production mode and fast-paced production situation due to its long desulfurization cycle (more than 35 minutes) and lagging behind the operation cycle of the converter and casting machine; Insufficient time for sedation and slag removal due to cycle mismatch, making it difficult to meet the low-sulfurization requirements of the variety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] (1) Breathable brick: use Al 2 O 3 —SiC-C material built-in overall structure, the appearance is a special-shaped structure, the size is designed as 269 / 303×(250 / 290~318 / 367)×220mm, the air supply pipe size ￠16×20 adopts a narrow breathable Distributed in the shape of two rings of the sun, the number of slits is (24+12), the width is 15mm, the thickness is 0.13~0.15mm, and the designed air flow rate is 7~30Nm 3 / h.

[0024] (2) Installation location: 54 degrees west of the bottom of the desulphurization molten iron tank (the fourth to sixth ring of the tank working layer brick), one at a time; the overall ventilation brick is made of east, west and south protection bricks, and the material is the same as that of the ventilation brick.

[0025] (3) High-pressure nitrogen: reduce pressure to a low pressure of 0.3~0.9MPa, and use metal hoses to connect with the desulfurization furnace; bottom blowing N 2 The pressure is 0.3~08MPa, the flow reference range is 12~23Nm 3 / h.

[0...

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PUM

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Abstract

The bottom blowing desulfurizing tank KR method includes blowing with high pressure nitrogen before skimming and regulating minimum permeating state to result in molten iron turning over in one tenth of tank volume, bottom blowing nitrogen while stirring in the flow rate of 12-23 Nm3 / hr and pressure of 0.3-0.8 MPa and sampling to measuring molten iron temperature, bottom blowing nitrogen after skimming by 3-8 min in the pressure 0.5- 0.8 MPa. The method has shortened desulfurizing period, low desulfurizing cost and high desulfurizing efficiency.

Description

Technical field [0001] The invention relates to a KR method desulfurization tank bottom blowing method. Background technique [0002] The pure KR method currently adopted for desulfurization, also known as mechanical agitation desulfurization, has the defect that it has a long desulfurization cycle (more than 35 minutes) and lags behind the converter and caster operation cycle, so it is not suitable for the current production mode and fast-paced production situation; Due to the cycle mismatch, there is not enough time to calm down and remove the slag, which makes it difficult to meet the requirements of low vulcanization. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a KR method desulfurization tank bottom blowing method to achieve high-efficiency, rapid and precise desulfurization, and meet the requirements of fast-paced production and low-sulfurization of varieties. [0004] The present invention uses the following ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/072B22D11/117
Inventor 王雪冬李具中陈清泉邓品团陶胜心童祥辉刘守堂王滨文涛周永丽
Owner 武钢集团有限公司
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