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A Targeted Slag Splash Gun Position Control Method for Converter Slag Splash Protection Furnace Protection

A technology of slag splashing to protect the furnace and slag splashing, which is applied in the iron and steel manufacturing process, the manufacturing converter, and the improvement of process efficiency. problem effect

Active Publication Date: 2022-03-08
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the irregularity of the furnace type that is easily caused by the existing slag splashing protection process, the present invention intends to provide a method for controlling the target slag splashing gun position of the converter slag splashing protection furnace, by analyzing the actual angle θ of the air flow and the center angle α , the nozzle hole expansion angle β, the oxygen lance position h, and the targeted slag splashing area H, and quantitatively controlled the relationship between the oxygen lance slag splashing gun position h and the targeted slag splashing area H, so as to realize the Targeted and precise slag splash control in the weak area of ​​the furnace lining; it will eliminate the irregularity of the furnace shape caused by the existing slag splash method, ensure the uniformity of the slag splash and the good control of the furnace shape, and protect the furnace by slag splashing Effects and furnace profile control will be improved

Method used

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  • A Targeted Slag Splash Gun Position Control Method for Converter Slag Splash Protection Furnace Protection
  • A Targeted Slag Splash Gun Position Control Method for Converter Slag Splash Protection Furnace Protection
  • A Targeted Slag Splash Gun Position Control Method for Converter Slag Splash Protection Furnace Protection

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Embodiment 1

[0032] A method for controlling the target slag splash gun position of the converter slag splash protection furnace in this embodiment is as follows: when the steel tapping is completed or the furnace is shut down and waiting, the laser thickness gauge can be used to accurately measure the erosion of each part of the furnace lining, and the analysis can be obtained The height of the weak area of ​​the furnace lining, that is, the height H of the area to be targeted for slag splashing, is established through physical simulation, numerical simulation, and a large number of on-site test corrections to establish a specific mathematical calculation model for the control of the targeted slag splashing gun position. The slag gun position, after the slag splashing is completed, proceed to the next furnace smelting. In this way, the targeted and precise slag splashing control of "pointing where to hit" is realized for the weak area of ​​the furnace lining, which enhances the controllabi...

Embodiment 2

[0047] A method of target slag splashing gun position control for converter slag splash protection in this embodiment has been successfully tested in a 300-ton top-bottom combined blowing converter in Maanshan Iron and Steel Co., Ltd. figure 1 As shown, in this embodiment, by establishing a mathematical calculation model for targeted and precise slag splashing gun position control, the targeted and precise slag splashing control of "pointing where to strike" is realized for the weak area of ​​the furnace lining, so that the process of slag splashing and protecting the furnace can be achieved. The controllability and operability are enhanced, and the problem of irregular furnace shape caused by the method of slag splashing is eliminated. The specific process is:

[0048] (1) First, collect and screen the on-site process parameters to understand the operation status of the equipment; the process parameters of the oxygen lance used in the converter blowing are: the number of oxy...

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Abstract

The invention discloses a target slag splashing gun position control method for converter slag splash protection furnace and belongs to the technical field of converter steelmaking. In the present invention, after the steel tapping is completed or when the furnace is shut down and waiting, the laser thickness gauge accurately measures the erosion of each part of the furnace lining; analyzes the height of the weak area of ​​the furnace lining (targeted slag splashing area H); and through physical simulation and numerical simulation As well as a large number of on-site test corrections, a mathematical calculation model for the control of the targeted slag splash gun position was established; the mathematical calculation model was used to carry out scientific and quantitative control of the slag splash gun position; thus realizing "pointing where to hit" the weak area of ​​the furnace lining The targeted and precise slag splashing control of "Where" enhances the controllability and operability of the slag splashing furnace protection process, eliminates the irregularity of the furnace type caused by the current slag splashing method, and improves various economic indicators.

Description

technical field [0001] The invention relates to the technical field of converter steelmaking, and more specifically relates to a method for controlling the target slag splash gun position of the converter for slag splash protection. Background technique [0002] At present, major steel mills generally use slag splashing to protect the furnace body to maintain the furnace body. The high-temperature terminal slag with relatively suitable alkalinity and magnesium oxide is used to make it evenly adhere to the surface of the furnace lining under the blowing and splashing of high-pressure nitrogen. , and well combined with the furnace lining to form a dense slag splash protection layer, thereby reducing the erosion of molten steel, slag and other factors during the blowing process, protecting the furnace lining and improving the life of the converter. During the charging and smelting process of the converter, various parts of the furnace lining often have different erosion degrees...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/44
CPCC21C5/443C21C2300/06C21C2005/448Y02P10/25
Inventor 周小宾范鼎东孙桂林蒲雪峰邓爱军
Owner ANHUI UNIVERSITY OF TECHNOLOGY