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Maintenance method for blast furnace hearth

A blast furnace furnace and grouting hole technology, which is applied to blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems such as the impact of blast furnace life, and achieve the effects of low cost, improved service life, and fast opening speed

Active Publication Date: 2010-11-17
WUHAN WINNING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In fact, this view is incorrect. How to maintain the hearth will have a crucial impact on the life of the blast furnace

Method used

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  • Maintenance method for blast furnace hearth
  • Maintenance method for blast furnace hearth

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0014] A maintenance method for a blast furnace hearth. The specific maintenance steps are as follows:

[0015] Step 1: Collect and summarize data. Monitor and measure the temperature difference between the temperature measured by each thermocouple installed in the hearth area of ​​the blast furnace and the water temperature difference of the stave 2, collect the monitored and measured data and organize and summarize; when the summarized data shows that the thermocouple somewhere When the measured temperature rises sharply and the change value of the water temperature difference of the corresponding stave 2 is less than 1°, it indicates that there is a gap in the carbon ramming material between the carbon brick and the stave 2, forming a heat insulation layer;

[0016] Step 2: Determine the location of the grouting hole 1. Such as figure 1 ...

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Abstract

The invention relates to a maintenance method for a blast furnace hearth. The method adopts the technical scheme that: when the temperature measured by a thermocouple at a position rises sharply and the variation value of the water temperature difference of a corresponding cooling wall 2 is less than 1 DEG C, the position of the thermocouple is taken as a datum hole 3, and the positions of the six vertical slits of the corresponding cooling wall 2 are determined as grout holes 1 respectively; after drilling and cleaning, grouting is started from the datum hole 3, and the grouting is performed on the grout holes 1 from bottom to top successively; and the temperature measured by the thermocouple and the water temperature difference of the cooling wall 2 are monitored and recorded, and if the variation value of the water temperature difference of the cooling wall 2 is more than 1 DEG C, a heat insulating layer is filled sufficiently, and the maintenance is finished; otherwise, the grouting is repeated until the variation value of the water temperature difference of the cooling wall 2 is more than 1 DEG C. The method is simple in determining positions with problems, can find the problem in a hearth zone correctly, has simple construction process and low cost, and avoids the influence on normal production of a blast furnace and improves the service life of the blast furnace during the maintenance.

Description

technical field [0001] The invention belongs to the technical field of blast furnace maintenance. Specifically relates to a method for maintaining a hearth of a blast furnace. technical background [0002] At present, the masonry of most blast furnace hearths is in the form of ceramic cups, and the temperature of the hearth thermocouples will usually rise when the blast furnace with this furnace body structure is produced for 2 to 3 years. This situation occurs because the ceramic cups are eroded and damaged, and the high-temperature molten iron in the dead iron layer is directly in contact with the carbon brick brick lining, resulting in a gradual increase in the temperature of the thermocouple at the damaged position of the hearth ceramic cup. At this time, if the water temperature difference of the cooling wall also rises accordingly, and the temperature of the thermocouple has been in a relatively stable range for a period of time, it means that the carbon ramming mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/00
Inventor 李新健唐坤李波苏伯平
Owner WUHAN WINNING TECH
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