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Nondestructive testing method for blast furnace lining

A non-destructive testing and blast furnace technology, applied in the field of metallurgy, to achieve the effect of improving detection accuracy, avoiding errors, and reducing errors

Active Publication Date: 2014-02-05
四川升拓检测技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method uses elastic waves to detect the thickness of the blast furnace lining, which overcomes the problem of detection blind spots in the prior art and the problem of determining the propagation speed of elastic waves in the furnace lining under thermal conditions, thereby greatly improving the test accuracy

Method used

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  • Nondestructive testing method for blast furnace lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for non-destructive testing of blast furnace linings, comprising the following steps:

[0042] Such as figure 1 As shown, step 1: determine a measured point O1 on the inner wall of the blast furnace;

[0043] Step 2: use the first acceleration sensor as a trigger sensor, and use the second acceleration sensor as a receiving sensor;

[0044] Step 3: Place the first acceleration sensor and the second acceleration sensor on the vertical projection point O3 of the measured point on the outer wall of the blast furnace, set an excitation source next to the first acceleration sensor, and the excitation source hits the outer surface of the blast furnace to generate elastic waves , record the trigger time when the first acceleration sensor detects the elastic wave, record the receiving time when the second acceleration sensor detects the elastic wave, subtract the triggering time from the receiving time to get the elastic wave propagation time .

[0045] Step 4: Tak...

Embodiment 2

[0066] Repeat step 4~step 5 three times to get multiple groups and , and then fit it to get the optimal and .

[0067] As shown in Table 1:

[0068] Table 1

[0069]

[0070] Compared with the actual furnace wall thickness (1.01m), the test error of this embodiment is about -1%. It can be seen that the test accuracy has been greatly improved.

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Abstract

The invention discloses a nondestructive testing method for a blast furnace lining. According to the method, an elastic wave is adopted for testing the blast furnace lining. The basic principle is as follows: the outer wall of a blast furnace is hit by a shock excitation source, and the elastic wave signal can be reflected after encountering the inner side surface; the thickness of the lining can be reckoned through receiving a signal of the reflected elastic wave according to the required returning time of the elastic wave signal. According to the method, the problem of blind zones in testing in the prior art is overcome; meanwhile, according to the method, the lining of the blast furnace cannot be damaged. The lining thickness value of the blast furnace and the wave speed value of the elastic wave can be obtained at the same time, and the testing accuracy is high.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a detection method for blast furnace lining. Background technique [0002] Blast furnace is an important equipment in steel production. Although countries around the world have developed many new iron and steel smelting methods, due to the advantages of blast furnace ironmaking with good technical and economic indicators, simple process, large production volume, high labor productivity, and low energy consumption, the iron and steel produced by this method still accounts for the largest share of the world's iron and steel production. More than 95% of the total output. [0003] However, due to various reasons, accidents of blast furnace walls being burnt through occur frequently, resulting in many major safety accidents. [0004] The thickness variation of blast furnace lining is closely related to the safe production of blast furnace. Therefore, it is of great significance to accurat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N22/02
Inventor 吴佳晔吴曾炜
Owner 四川升拓检测技术股份有限公司
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