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Combined-blowing converter bottom gas supply element blocking-preventing device and method

A gas supply element and converter bottom blowing technology, which is applied in the field of iron and steel metallurgy, can solve the problems of poor operability of the oxygen blowing and plugging system, difficulty in mastering the operating process, and missing the best time for blowing and plugging, so as to reduce the design difficulty and Project cost, prolong life, remarkable effect of economic benefit

Active Publication Date: 2006-03-08
CENT IRON & STEEL RES INST
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  • Abstract
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AI Technical Summary

Problems solved by technology

The cost of equipment and construction of the whole system will be greatly increased
[0006] (2) During the oxygen blowing operation, the operation process is difficult to master, and the capacity causes excessive burning loss at the bottom of the furnace, resulting in steel leakage accidents
[0007] (3) Due to the poor operability and practicability of the oxygen plugging system, steel plants generally do not use it easily after installing the oxygen plugging system, and often miss the best time for blowing plugging

Method used

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  • Combined-blowing converter bottom gas supply element blocking-preventing device and method

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Embodiment

[0027] By adopting the device and method for blowing, plugging and re-opening of the bottom-blowing air supply element of the complex-blowing converter of the present invention, the application of blowing, blocking and re-opening of the bottom-blowing gas supply element has been carried out on three complex-blowing converters. Usually, the bottoms of large and medium-sized complex-blowing converters are equipped with 4 Up to 8 ring-slit bottom-blowing gas supply components, one of the 3 compound-blown converters tested has been blocked successively. Although it is not completely blocked, the gas supply flow rate has been greatly reduced, which has affected the entire For the re-blowing effect of the converter, it is necessary to implement blowing and re-blowing. The tonnage of the combined blowing converter in the test, the service life of the bottom blowing gas supply components before blowing and plugging, and the parameters of the bottom blowing gas supply are listed in Tabl...

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Abstract

This invention blow-stop ventilation device of a bottom blow gas supply element of a multi-blow converter is composed of an air dehydrator, a pneumatic fast cut valve, a pneumatic regulation valve, a gas flowmeter, a pressure tester, a computer control system, a blow-step gas source and gas transportation pipe lines interconnected by the gas transportation pipe lines. Said method takes air as the gas supply element and utilizes 20% oxygen in the air to oxidize the blockage-slag-metal mushroom head continuously to keep it at reasonable state to ensure the life time of the supply element the same with the converter lining.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and relates to a converter double blowing steelmaking device. Background technique [0002] Combined blowing converter technology is a major technical progress in converter steelmaking. After the converter steelmaking adopts the double blowing process, the metallurgical reaction is closer to equilibrium, the converter splash is reduced, the residual manganese at the end is increased, and the smelting steel is more extensive. Keeping the bottom blowing gas supply element with good air permeability throughout the furnace service period is a necessary guarantee for the use of reblowing technology. At present, the service life of the reblowing converter lining in my country has reached more than 35,000 furnaces. Scientific maintenance of the bottom blowing gas supply components of the reblowing converter, so that its life is synchronized with the age of the furnace, is the best way to obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/34
Inventor 刘浏佟溥翘布焕存郑丛杰李文平杨利彬
Owner CENT IRON & STEEL RES INST
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