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Non-destructive testing method for blast furnace lining

A non-destructive testing and blast furnace technology, applied in the field of metallurgy, to avoid errors, reduce errors and improve detection accuracy

Active Publication Date: 2016-04-20
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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  • Non-destructive testing method for blast furnace lining
  • Non-destructive testing method for blast furnace lining
  • Non-destructive testing method for blast furnace lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The non-destructive testing method of blast furnace lining includes the following steps:

[0042] Such as figure 1 As shown, Step 1: Determine a tested point O1 on the inner wall of the blast furnace;

[0043] Step 2: Use the first acceleration sensor as the trigger sensor and the second acceleration sensor as the trusted 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, and set an excitation source next to the first acceleration sensor. 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, and subtract the trigger time from the receiving time to obtain the elastic wave propagation time T 0 .

[0045] Step 4: Taking the measur...

Embodiment 2

[0066] Repeat steps four to five three times to get multiple sets of x i And T i , And then fit it to get the optimal D and V p .

[0067] As shown in Table 1:

[0068] Table 1

[0069]

[0070] Compared with the actual furnace wall thickness (1.01 m), 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 non-destructive detection method for blast furnace lining. In the invention, elastic waves are used to detect the blast furnace lining. Reflection will occur after the inner surface is measured, and the thickness of the lining can be calculated by receiving the reflected elastic wave signal and according to the time required for the elastic wave signal to return. The invention overcomes the problem of detection blind area in the prior art, and at the same time, the method will not damage the lining of the blast furnace. The invention can simultaneously obtain the lining thickness of the blast furnace and the wave velocity of the elastic wave, and has high detection accuracy.

Description

Technical field [0001] The invention relates to the field of metallurgy, in particular to a detection method of blast furnace lining. Background technique [0002] Blast furnace is an important equipment in steel production. Although many countries in the world have developed many new steel smelting methods, because blast furnace ironmaking has the advantages of good technical and economic indicators, simple technology, large production, high labor productivity, and low energy consumption, the steel produced by this method still accounts for the world’s steel More than 95% of the total output. [0003] However, due to various reasons, the blast furnace wall was burned through frequently, leading to many major safety accidents. [0004] The thickness change of blast furnace lining is closely related to the safety of blast furnace production. Therefore, accurately grasping the changes of the blast furnace lining, timely adjusting the operation strategy and taking effective protectiv...

Claims

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Application Information

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Patent Type & Authority Patents(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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