Repatching method for top liner of blast furnace hot-wind pipeline

A technology of hot air pipes and pipes, which is applied to blast furnace parts, blast furnaces, and details of blast furnaces to achieve the effects of restoring production, shortening repair time, and improving results

Active Publication Date: 2010-06-30
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation of this spray unit is that it is only suitable for repairing hot air spools, especially if the spray unit cannot access or see the damage.

Method used

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  • Repatching method for top liner of blast furnace hot-wind pipeline
  • Repatching method for top liner of blast furnace hot-wind pipeline
  • Repatching method for top liner of blast furnace hot-wind pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0023] exist figure 1 In the process, first determine the damage of the low-creep andalusite brick 4 of the working layer on the top of the hot air duct and the high-alumina lightweight brick and clay lightweight brick 3 of the insulation layer. For the serious damage of the hot air duct, generally choose to cool the hot air duct first , and then go inside to check for damage.

[0024] The second step is to open a hole in the steel shell 1 of the hot air duct according to the damage of the lining. The size of the hole should be 80mm or 100mm smaller than the size of the intact working layer brick 4 on each side. The clay spray paint 2 around the hole should be cleaned to facilitate welding. Stainless steel hooks; when cleaning the damaged inner lining on the top, it is necessary to determine whether to provide necessary fixed support for the adja...

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Abstract

The invention discloses a repatching method for the top liner of a blast furnace hot-wind pipeline. According to the damage condition of the liner of the pipeline, a pipeline steel housing (1) is provided with a hole, and the periphery of the inner surface of the pipeline steel housing (1) is welded with lifting hooks (6) and a wood mould supporting is supported well (5), and then a working layer pouring material (8) and a warm keeping pouring material (7) are poured, and then the pipeline steel housing (1) is welded well; a pipeline skin is welded with more than two mudjacking holes (9), and mudjacking material is pressed into the gap between the steel housing (1) and the warm-keeping pouring material (7), and the construction pressure is kept between 2 to 3kg/cm2. The invention resolves the emergency gusty repatching problem for the damage of the blast furnace hot-wind pipeline, so that the liner of the blast furnace hot-wind pipeline is repaired fast , thus improving the construction effect of the pipeline repatching.

Description

technical field [0001] The invention provides a method for repairing the top lining of a blast furnace hot blast pipe, which belongs to the technical field of repairing the inner lining of the blast furnace hot blast pipe, and is particularly suitable for rapidly repairing the damaged working lining at the top of the blast furnace hot blast pipe. Background technique [0002] With the increase of blast furnace volume and blast temperature level, the working conditions of the hot blast pipeline are getting worse and worse. During the ironmaking process, the top of the blast furnace hot blast pipeline is prone to problems such as the temperature rise of the tube skin, which threatens the safe use of the steel structure of the hot blast pipeline. The main reason for these problems is that there is a gap between the inner linings on the top of the hot air pipe, which causes air to flow between the refractory materials on the top of the pipe. There are even vicious accidents such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B9/10
Inventor 郑敬先马金芳王建民赵久梁芦文凯常醒民王桂才蔡景春王卫平贾国利
Owner BEIJING SHOUGANG CO LTD
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