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Blast furnace hearth and bottom erosion discrimination method based on combination of newly installed and old thermocouples

A discrimination method and thermocouple technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of thermocouple failure, failure to monitor the residual thickness of blast furnace hearth bottom refractory materials in time, etc., and achieve the effect of improving longevity

Pending Publication Date: 2022-02-18
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical solution: In order to solve the problem that the remaining thickness of refractory material at the hearth bottom of the blast furnace cannot be monitored in time due to the failure of some thermocouples during the service period of the blast furnace, the present invention provides a method for the hearth bottom erosion of the blast furnace based on the combination of new installations and old thermocouples. The discrimination method comprises the following steps: (1) constructing grid nodes according to blast furnace structural parameters; (2) identifying damaged thermocouples on the grid nodes, and laying new thermocouples in corresponding areas; (3) measuring newly added thermocouples The temperature data of each temperature monitoring node of the thermocouple and the old thermocouple, and use the temperature data of the newly added thermocouple to calculate the temperature data of the temperature monitoring node corresponding to the damaged thermocouple; (4) according to the temperature in step (3) The temperature data of the monitoring nodes is used to establish a regional grid, and the hearth bottom erosion model can be obtained

Method used

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  • Blast furnace hearth and bottom erosion discrimination method based on combination of newly installed and old thermocouples
  • Blast furnace hearth and bottom erosion discrimination method based on combination of newly installed and old thermocouples
  • Blast furnace hearth and bottom erosion discrimination method based on combination of newly installed and old thermocouples

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Embodiment 1

[0025] This embodiment provides a method for discriminating corrosion of the blast furnace hearth bottom based on the combination of newly installed and old thermocouples. The blast furnace body 1 is provided with an old thermocouple 4 (or the original thermocouple), and the old thermocouple 4 is connected to the data processing unit. 3 Sending signals, using the data processing unit 3 to directly record and process the internal temperature of the blast furnace. The data processing unit 3 is an intelligent terminal, such as a computer, and has a data display module such as an LED display. During the entire production process of the blast furnace, some thermocouples will fail due to various emergencies. Even if a new thermocouple 2 is installed in the damaged area, both the new thermocouple 2 and the old thermocouple 4 will send monitoring documents to the data processing unit 3, It can solve the problem of failure of some thermocouples. Preferably, the newly installed thermoco...

Embodiment 2

[0028] On the basis of Example 1, this example provides a method for discriminating corrosion of the hearth bottom of a blast furnace based on the combination of newly installed and old thermocouples. The blast furnace body 1 is 5800m 3 For blast furnaces, considering the two-dimensional heat transfer on the side wall of the hearth, the layout of newly installed thermocouples 2 should be reasonably arranged at the same elevation and different depths and at the same depth and different elevations, and the furnace bottom part should be replaced reasonably according to the specific damaged parts of the thermocouples. The operation method is as follows:

[0029] Step 1: Select key four-layer thermocouples covering areas with severe hearth erosion, such as the elephant foot area and the area near the iron mouth, for key investigations, respectively at elevations of 8.59m, 9.79m, 10.99m, and 12.19m.

[0030] The second step: Through comprehensive analysis and statistics of the damag...

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Abstract

The invention provides a blast furnace hearth and bottom erosion discrimination method based on combination of newly installed and old thermocouples, which comprises the following steps: (1) constructing grid nodes according to blast furnace structure parameters; (2) discriminating damaged thermocouples on the grid nodes, and arranging newly added thermocouples in corresponding areas; (3) measuring the temperature data of each temperature monitoring node of the newly added thermocouple and the old thermocouple, and calculating the temperature data of the temperature monitoring node corresponding to the damaged thermocouple by using the temperature data of the newly added thermocouple; and (4) establishing a regional grid according to the temperature data of the temperature monitoring nodes in the step (3), so as to obtain a hearth bottom erosion condition model. According to the method, the existing thermocouple distribution and damage conditions of the hearth are comprehensively considered, the distribution points of the newly added thermocouples are reasonably arranged, and an effective shortcut is provided for improving the long-life level of the blast furnace and guiding safety production.

Description

technical field [0001] The invention relates to the technical field of blast furnace hearth bottom erosion detection, in particular to a blast furnace hearth bottom erosion discrimination method based on the combination of new installations and old thermocouples. Background technique [0002] In recent years, under the background of the increasing type of blast furnace, the working conditions of the hearth and bottom of the blast furnace have become more severe, and the requirements have become more stringent, and the high-temperature molten iron in the furnace is directly in contact with the refractory. With the increase of time, the erosion of the refractory lining of the hearth bottom is also becoming more and more serious. Generally, thermocouples are embedded in the construction of the blast furnace to detect the corrosion of the hearth bottom in time, but in the whole production process of the blast furnace, some thermocouples will fail due to various emergencies, resu...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06F17/10C21B7/24C21B5/00G06F119/08
CPCG06F30/27G06F17/10C21B7/24C21B5/006G06F2119/08C21B2300/04
Inventor 杜屏雷鸣周夏芝王振阳杜申李瑞雨张建良杨天钧
Owner ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD
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