Bottom blowing method for KR method desulfurizing tank

A desulfurization tank and front slag technology, applied in the field of bottom blowing of KR method desulfurization tank, can solve the problems of not adapting to the production mode and fast-paced production situation, difficult to meet the requirements of low sulfurization of varieties, and not enough time to calm and remove slag. The effect of KR desulfurization production technology upgrading, promoting substantial improvement, and improving the purity of molten iron

Inactive Publication Date: 2007-04-11
WUHAN IRON & STEEL (GROUP) CORP
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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 0 3 -The built-in overall structure of SiC-C material, the outer shape is a special-shaped structure, the size is designed to be 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 ventilating brick is made of east, west and south three protection bricks, and the material is the same as that of ventilating bricks.

[0025] (3) High pressure nitrogen: reduce pressure to low pressure 0.3~0.9Mpa, use metal hose to connect with desulfurization fume; bottom blowing N 2 The pressure is 0.3~0.8Mpa, the flow reference range is 12~23Nm 3 / h.

[002...

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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 does not adapt to the current production mode and fast-paced production situation; at the same time; 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 use...

Claims

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Application Information

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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 WUHAN IRON & STEEL (GROUP) CORP
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