Exchange technology of hot air furnace hot air short pipe

A technology of hot blast stove and short pipe is applied in the field of replacement technology of hot blast short pipe to achieve the effects of ensuring quality, reducing the difficulty of hoisting and shortening the construction time.

Inactive Publication Date: 2005-05-25
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to invent a process for replacing short hot blast tubes of blast furnace hot blast stoves, so as to solve the technical problem of replacing short hot blast tubes in blast furnaces without stopping the wind

Method used

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  • Exchange technology of hot air furnace hot air short pipe

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Embodiment Construction

[0022] combine figure 1 , the hot blast short tube of the hot blast stove is replaced under the condition of continuous wind, it is mainly heat-insulated by the repaired hot blast stove, the hot blast valve 1 is closed, and the flue valve is opened small so that the hot blast stove is under negative pressure relative to the short hot blast tube 2. Build a fire-retaining wall 4 in the short pipe on the side of the furnace, remove the damaged short hot air pipe, install a new short hot air pipe 2 and a detachable short pipe 3, remove the detachable short pipe 3, build the inner lining of the short hot air pipe 2, remove the baffle The firewall 4 is composed of processes such as installing the detachable short pipe 3. The heat preservation treatment of the repaired hot blast stove should be done two hours before construction, on the one hand to ensure the safety of the construction, on the other hand to ensure that the repaired hot blast stove can be put into production as soon a...

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Abstract

A technology for exchanging the short hot air tube of blast heater includes holding the temp of the blast heater, closing hot air valve, slightly opening flue valve to generate negative pressure, masoning firewall at the side of blast heater, detaching the damaged shot hot air tube, installing new one consisting of fixed short tube and detachable short tube, detaching the detachable short tube, masoning the linear, detaching firewall, and installing the detachable short tube.

Description

technical field [0001] The invention relates to the maintenance of the blast furnace hot blast stove, in particular to the replacement process of the hot blast short pipe. Background technique [0002] Taking China's Ma'anshan Iron and Steel Co., Ltd. No. 4 Iron Works as an example, the 2500m 3 The blast furnace is equipped with four Nippon Steel external-combustion hot blast stoves. When each hot blast stove is working, the heated high-temperature air is sent to the hot blast main pipe through the hot blast short pipe and then sent to the blast furnace. Therefore, the hot blast short pipe is connected to the hot blast stove. And the important channel of the hot blast main pipe; structurally, the hot blast stove and the hot blast main pipe are separated by a hot blast valve. When the hot blast stove is in the normal air supply state, the short hot blast pipe needs to withstand the scour of high temperature and high pressure gas at about 1300°C and 0.38MPa; when the hot blas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B9/10
Inventor 黄发元徐剑峰黄足兵施浩
Owner MAANSHAN IRON & STEEL CO LTD
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