Accurate converter slag splashing method

A technology of slag splashing and converter, applied in the field of metallurgy, can solve the problems of large influence of converter smelting and low precision of slag splashing layer, etc.

Inactive Publication Date: 2019-05-28
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a method for precise slag splashing of converters, which can effectively solve the problem of low precision of slag splashing layer of converter slag splash repair furnace lining, which has a greater impact on converter smelting

Method used

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  • Accurate converter slag splashing method
  • Accurate converter slag splashing method
  • Accurate converter slag splashing method

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Embodiment 1

[0047] The precise slag splashing method for a 120-ton oxygen top-bottom combined blowing converter includes the following steps:

[0048] 1) Observe the furnace body when tapping, and confirm that the slag surface of the converter is seriously eroded at the furnace lining 5-6 meters from the bottom of the furnace, which is 50mm more concave than the normal part;

[0049] 2) Adjust the flow rate of the two bottom blow guns on the slag surface of the converter to 730Nm 3 / h, the flow rate of other bottom blowing guns maintains the standard flow rate (400Nm 3 / h);

[0050] 3) After tapping, shake the converter until the furnace body deviates 2° from the slag surface vertically;

[0051] 4) Lower the lance for slag splashing, the slag splashing base gun position is controlled at 2629mm from the furnace bottom, the slag splashing gun position adjustment range is ±500mm from the slag splashing base gun position, and the slag splashing flow rate of the top lance is controlled at 3...

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Abstract

The invention discloses an accurate converter slag splashing method. The accurate converter slag splashing method comprises the steps that during tapping, a converter body is checked, the erosion situation of various parts of the converter body is determined, and the bottom blow gun flow of corresponding parts is correspondingly adjusted according to the erosion situation of various parts of the converter body; after tapping is finished, a converter is rocked to the assigned position according to the converter body erosion situation; gun lowering is conducted for slag splashing, the slag splashing base gun position and flow are determined according to the erosion situation of various parts of the converter body, the slag splashing gun position is lowered within the optimal slag splashing gun position range along with increasing of the height of the erosion part, and the slag splashing flow is increased within the optimal slag splashing flow range along with increasing of the height ofthe erosion part; and after slag splashing is finished, the converter is rocked to the loading position for loading. By means of the method, the thickness of slag splashing layers of various parts ofthe converter body is accurately controlled, scientific and standard control over the converter profile is achieved, and running safety of the converter body is ensured. Through accurate control overthe slag splashing amount, scientific control over the converter profile is achieved, accordingly, operation stability is improved, the slag overflow amount in the smelting process is reduced, various economic indexes are increased, and the smelting cost is reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and more specifically, to a method for precise slag splashing in a converter. Background technique [0002] During the charging and smelting process of the converter, various parts of the furnace lining are impacted and scoured by scrap steel and molten iron, and the erosion speed of slag and molten steel is different, so some parts are often severely corroded. Currently, slag splashing is often used to repair the furnace lining. However, the amount of slag splashed in each part of the furnace body is basically the same during slag splashing. After slag splashing, the slag splash layer of each part cannot be precisely controlled as required. As a result, when some parts of the furnace lining are severely corroded, they cannot be repaired in time, and the furnace shutdown method is forced to be used. Maintenance has a great impact on production stability and smelting costs. [0003] In additio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/44
Inventor 任科社张昭平乔明林敏谭学样王尖锐郭达王玉春
Owner SHANDONG IRON & STEEL CO LTD
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