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Mounting method of blast furnace hearth bottom temperature thermocouple

A technology of temperature measurement thermocouple and installation method, which is applied in inspection devices and other directions, can solve the problems that the thermocouple cannot truly reflect the temperature of carbon bricks and the measurement error of the thermocouple is large, so as to eliminate air gaps, prevent air gaps, and improve measurement The effect of precision

Active Publication Date: 2016-06-01
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the large measurement error of the thermocouple after the replacement of the blast furnace in the prior art, so that the thermocouple cannot truly reflect the temperature of the carbon brick, and provide a method for installing the thermocouple for measuring the temperature at the hearth bottom of the blast furnace, thereby Reduce the measurement error of the thermocouple and realize the on-line monitoring of the corrosion state of the hearth bottom

Method used

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  • Mounting method of blast furnace hearth bottom temperature thermocouple
  • Mounting method of blast furnace hearth bottom temperature thermocouple
  • Mounting method of blast furnace hearth bottom temperature thermocouple

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Effect test

Embodiment 1

[0058] combine figure 1 , 2 , 3, 4, 5 and 7, a thermocouple online installation device for blast furnace temperature measurement of the present invention, including a grouting mechanism and a sealing mechanism, a grouting outlet is provided on the grouting mechanism, and the grouting outlet is used for grouting After the gap is filled, the excess slurry is discharged, and the slurry outlet is located at the end far away from the sealing mechanism; since the slurry outlet is located at the end far away from the sealing mechanism, the gas in the installation hole can be completely discharged during the process of filling the gap. , only when the slurry fills the entire gap, the slurry will flow out from the slurry outlet, preventing air gaps during the slurry filling process, thereby improving the accuracy of the thermocouple.

[0059] The grouting mechanism includes a grout inlet pipe 51 and a grout outlet pipe 31. The grout outlet pipe 31 is provided with a grout outlet pipe ...

Embodiment 2

[0123] The basic content of this embodiment is the same as that of Embodiment 1, and the difference is that: during the compaction process, close the slurry outlet valve 33, increase the grouting pressure to 0.08MPa, and keep it for 20 minutes; the outer casing 4 and the slurry inlet pipe 51 are provided with With matching internal and external threads, the outer casing 4 and the slurry inlet pipe 51 are threadedly connected, and the airtightness of the outer casing 4 and the slurry inlet pipe 51 is tested.

[0124] The horizontal distance between the first thermocouple 21 temperature measuring end face and the furnace skin 8 surface is 515mm, and the second thermocouple 22 is 565mm apart from the horizontal distance on the furnace skin 8 surface; the first thermocouple 21 temperature measuring end face and the second thermocouple 22 The horizontal distance between the end face of the temperature measuring end is 50mm. The horizontal distance between the first temperature meas...

Embodiment 3

[0129] The basic content of this embodiment is the same as that of Embodiment 1, except that: during the compaction process, the grouting valve 33 is closed, the grouting pressure is increased to 0.1 MPa, and maintained for 15 minutes. The horizontal distance between the first thermocouple 21 temperature measuring end face and the furnace skin 8 surface is 415mm, and the horizontal distance between the second thermocouple 22 and the furnace skin 8 surface is 565mm; the first thermocouple 21 temperature measuring end face and the second thermocouple 22 The horizontal distance between the end face of the temperature measuring end is 150mm. During installation, the horizontal distance between the first temperature measuring point and the surface of the furnace skin 8 is 415mm, the first temperature measuring point and the temperature measuring end face of the first thermocouple 21 are located at the same vertical position, and the second temperature measuring point is at the same ...

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Abstract

The invention discloses a mounting method of a blast furnace hearth bottom temperature thermocouple, belonging to the field of blast furnace temperature detection in metallurgical industry. The method comprises the following steps: 1. drilling: drilling from a furnace casing surface by a drill, thereby obtaining a mounting hole; 2. mounting of thermocouple: putting the thermocouple into the mounting hole, filling the gap in the mounting hole by using a slurry, and finishing the mounting after the slurry solidifies. In the fixed part pretreatment process, a slurry coating is applied to the coating end of the fixed part provided with the thermocouple, and the slurry is previously injected into the carbon brick at the tail end of the mounting hole by using an injection tube; when the fixed part contacts the tail end of the mounting hole, the air gap is avoided, so that the slurry sufficiently fills the mounting hole, thereby effectively eliminating the air gap generated in the slurry filling process; and thus, the temperature measured by the thermocouple truly reflects the temperature of the carbon brick.

Description

technical field [0001] The invention relates to the field of blast furnace temperature detection in the metallurgical industry, and more specifically relates to an installation method of a thermocouple for measuring the temperature of the furnace bottom of a blast furnace hearth. Background technique [0002] The blast furnace is an important part of the iron and steel complex. The blast furnace has good technical and economic indicators, simple process, large production capacity, high labor productivity and low energy consumption. The pig iron it produces accounts for more than 95% of the world's total iron production. Today, blast furnace longevity is the goal pursued by modern blast furnaces, and blast furnace longevity means the improvement of economic benefits. Among them, blast furnace hearth and bottom are the top priority of blast furnace production safety and longevity. According to the current statistics, blast furnace hearth burn-through at home and abroad mostly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/24
CPCC21B7/24
Inventor 王平龙红明狄瞻霞孟庆民春铁军李家新
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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