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A Blast Furnace Lining Monitoring Method Based on Shock Echo Method

A technology of shock echo and blast furnace lining, which is applied in the field of metallurgy, can solve problems such as difficult lining, erosion, and reflection signal influence, and achieve the effects of avoiding monitoring dead angles and blind areas, accurate and fast monitoring, and improving accuracy

Active Publication Date: 2022-05-20
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the blast furnace wall has multiple layers of materials such as furnace shell, stave, ramming material, and carbon bricks, the signal propagation speeds in various materials are different, and affected by temperature, the stress wave propagating through different materials will produce complex interface reflections , in addition, the blast furnace production site vibration, the surface waves generated by the facilities around the measuring point, etc., all have a greater impact on the reflected signal, and it is difficult to obtain an accurate signal propagation speed, which makes it difficult to accurately judge the furnace lining erosion and other conditions. Its application and promotion It is also very limited

Method used

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  • A Blast Furnace Lining Monitoring Method Based on Shock Echo Method
  • A Blast Furnace Lining Monitoring Method Based on Shock Echo Method
  • A Blast Furnace Lining Monitoring Method Based on Shock Echo Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A certain 450m 3 The blast furnace was originally equipped with a thermocouple monitoring system. There are two layers of staves in a certain height range in the second section of the hearth, and two thermocouples at 4 points in the circumferential direction of each layer are respectively arranged at about 30° on both sides of the second iron hole. The interval is about 500mm, and the depth of inserting the brick lining is 50mm and 170mm respectively. Under normal and accurate temperature measurement by galvanic couple, the remaining thickness of the furnace lining at 8 points in two layers can be obtained according to the temperature data. The diameter of the blast furnace hearth is about 8m, and there are two The distance between the temperature measurement points is more than 4m and 8m respectively, and there is a large monitoring blind area.

[0050] On the basis of the original galvanic couple monitoring system, the measuring points of the shock echo system are det...

Embodiment 2

[0056] A certain 1000m 3 A resistance element is embedded in the lower part of the blast furnace body, and the resistance element and the furnace lining are worn out synchronously. The remaining length of the resistance element is judged according to the change of the resistance signal, and the remaining thickness of the furnace lining is obtained. There are 10 sets of components buried in the circumferential direction at a certain height, and 2 sets of components are damaged and cannot be read.

[0057] On the basis of the original monitoring system, the measuring points of the shock-echo system are determined equidistantly between the implanted points of the resistance elements along the circumferential direction, and a total of 60 points are determined, and the scanning shock-echo instrument is used for detection at each determined measuring point position , each measuring point collects echo signals 6 times, and the signal acquisition conditions of each measuring point rem...

Embodiment 3

[0060] A certain 1800m 3 There are 16 ultrasonic measuring rods installed in the height range of staves in the 10-13 section of blast furnace shaft, and 4 measuring points are evenly arranged on each floor. Changes in the length of the measuring rod can be obtained.

[0061] On the basis of the original monitoring system, the measuring points of the shock echo system are determined every 15° between the installation points of the measuring rods along the circumferential direction. The position of each measuring point is detected by the shock echo instrument. Each measuring point collects echo signals 5 times. The signal acquisition conditions of each measuring point remain the same. The signals collected at each point are selected for effective signals and fast Fourier analysis and maximum entropy analysis. Method analysis to obtain the corresponding spectrum analysis parameters.

[0062] According to the remaining length of the ultrasonic measuring rod obtained by the origi...

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Abstract

The invention provides a blast furnace lining monitoring method based on the shock echo method, which is realized by using the first system and the second system. The first system is a lining monitoring system that needs to implant fixed intrusive sensors in the blast furnace body. The fixed invasive sensor is a thermocouple or a sensor capable of equivalent loss to the furnace lining, and the second system is a single-point or scanning movable monitoring system based on the shock-echo method. Make full use of and combine the existing conventional fixed intrusive furnace lining monitoring system, and combine the high accuracy of the conventional monitoring system with the high flexibility of the shock echo method to effectively improve the blast furnace monitoring performance of the shock echo system. Accuracy, while effectively increasing the scope of blast furnace lining monitoring area, reducing or avoiding monitoring dead angles and blind areas, providing a basis for more comprehensive, accurate and fast monitoring of blast furnace lining erosion conditions.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a blast furnace lining monitoring method based on a shock echo method. Background technique [0002] With the large-scale development of blast furnaces and the improvement of equipment level, blast furnace longevity technology has been fully developed, and some large blast furnaces in the world have a first-generation service life of more than 20 years. In recent years, advanced technologies such as blast furnace body cooling, copper cooling stave, high-quality refractory materials, blast furnace monitoring, and soft water closed circulation cooling system have been widely used in my country in recent years. Significant progress has also been made in longevity. Some blast furnaces have a life span of more than 15 years. But on the other hand, the development of blast furnace longevity in my country is very uneven. The average life of blast furnaces is only 5 to 10 years. In pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/06C21B7/24C21B5/00
CPCC21B7/06C21B7/24C21B5/006Y02P10/20
Inventor 张伟张立国李金莲朱建伟李仲谢明辉任伟王亮宫作岩韩子文
Owner ANGANG STEEL CO LTD