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A Control Method for Improving the Life of Bottom Blowing of Converter with Top and Bottom Combined Blowing

A technology of top-bottom double-blowing and control method, applied in the direction of manufacturing converters, etc., can solve the problem of short bottom-blowing life of top-bottom double-blowing converters, increasing the effective erosion length of bottom-blowing components, and prolonging the bottom-blowing life of top-bottom double-blowing converters and other problems, to avoid the reduction of furnace capacity ratio, increase the effective erosion length, and solve the effect of short bottom blowing life.

Active Publication Date: 2018-01-23
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a control method for improving the life of the bottom blowing converter with top and bottom combined blowing, which solves or partially solves the technical problem of short life of the bottom blowing converter in the prior art, and realizes the increase of the bottom blowing components. Effective erosion length, the technical effect of prolonging the life of bottom blowing converter with combined top and bottom blowing

Method used

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  • A Control Method for Improving the Life of Bottom Blowing of Converter with Top and Bottom Combined Blowing
  • A Control Method for Improving the Life of Bottom Blowing of Converter with Top and Bottom Combined Blowing
  • A Control Method for Improving the Life of Bottom Blowing of Converter with Top and Bottom Combined Blowing

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Embodiment 1

[0041] For converter 1, the life of the converter is 6000 furnaces, and according to engineering practice, the life of the bottom blowing furnace is 4000 furnaces. After the furnace is built, the spherical radius R of the inner surface of the furnace bottom brick 2 is 6000m, and the total thickness of the permanent layer and the working layer of the furnace bottom is 1200mm. The distance d1=120mm, the diameter d0 of the bottom blowing element 3 is 22mm.

[0042] After the bottom blowing element 3 is installed, install the protective brick 4 on the bottom blowing element 3. The thickness H of the protective brick 4 is 140mm, the diameter of the middle hole is d=23mm, and the outer diameter D1 of the upper surface of the protective brick 4 is 40mm. The outer diameter of the surface D2=100mm, the radius of the lower surface of the protective brick 4 is 6000m, the spherical radius R1 of the upper surface of the protective brick 4 is 5860mm, and the material of the protective brick...

Embodiment 2

[0046] For the second converter, the life of the converter is 7000 furnaces, and according to engineering practice, the life of the bottom blowing furnace is 4500 furnaces. After the furnace is built, the spherical radius R of the inner surface of the furnace bottom brick 2 is 12000m, and the total thickness of the permanent layer and the working layer of the furnace bottom is 1300mm. The distance d1=180mm, the diameter d0 of the bottom blowing element 3 is 28mm.

[0047] After the bottom blowing element 3 is installed, install the protective brick 4 on the bottom blowing element 3. The thickness H of the protective brick 4 is 220mm, the diameter of the middle hole is d=30mm, and the outer diameter D1 of the upper surface of the protective brick 4 is 70mm. The outer diameter D2 of the surface is 400mm, the spherical radius of the lower surface of the protective brick 4 is 12000m, the radius R1 of the upper surface of the protective brick 4 is 11780mm, and the material of the p...

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Abstract

The invention relates to a control method for prolonging the bottom blowing service life of a top-bottom combined blowing converter. The control method comprises the steps that after walling up of the top-bottom combined blowing converter is over, bottom blowing elements are arranged in converter bottom bricks; the distance d1 by which the bottom blowing elements stretch out of the converter bottom bricks ranges from 100 mm to 200 mm; the bottom blowing elements are covered with protection bricks; converter baking is conducted on the top-bottom combined blowing converter; in the converter baking process, the bottom blowing elements conduct bottom blowing ventilation with the set protection flow; in first five converters before smelting of the top-bottom combined blowing converter, the thickness of the converter bottom is increased through a splashed slag converter protection manner; and in first ten converters before smelting of the top-bottom combined blowing converter, the converter rocking angle of the top-bottom combined blowing converter is controlled to range from -100 degrees to 100 degrees. According to the control method, the effective erosion length of the bottom blowing elements is increased, and the bottom blowing service life of the top-bottom combined blowing converter is prolonged.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a control method for improving the bottom blowing life of a top-bottom combined blowing converter. Background technique [0002] The life of the converter refractory directly affects the life of the converter, and for the top-bottom double-blown converter, the furnace bottom is often the most serious erosion of the converter refractory, therefore, in the later stage of converter smelting, it is generally used to close the bottom blowing or increase the thickness of the furnace bottom The method is used to ensure the safety of the converter, which leads to a short life of the bottom blowing, and the synchronization of the life of the bottom blowing of the converter with the age of the furnace cannot be realized. At the same time, in order to prolong the service life of the bottom blowing furnace, the furnace bottom needs to be repaired frequently, and the fluctuation of the fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/35
CPCC21C5/35
Inventor 高攀王新华李海波张立国孙亮孙彦辉尹娜刘风刚彭开玉王东赵晓东陈建光罗衍昭庞在刚赵东伟马文俊
Owner SHOUGANG CORPORATION
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