Detection method for melting effect between cast copper cooling wall body for blast furnace and cast-in cooling water pipe for blast furnace

A technology of cast copper cooling wall and cooling water pipe, which is applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, etc. It can solve the problems of difficult detection and analysis, coarse grains, etc., and achieve accurate thickness measurement, uniform and fine structure, and stable echo Effect

Active Publication Date: 2016-05-18
武钢集团襄阳重型装备材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the grains of cast copper staves are generally coarse and easy to form local shrinkage porosity, it is difficult to detect and analyze them.
At present, there are no corresponding methods and standards at home and abroad to determine the combination between the cooling water pipe and the stave body in the cast copper stave, which also makes it impossible to identify and detect the product quality of the cast copper stave. Therefore, to explore Research on the method of judging the metallurgical fusion between the cooling water pipe and the stave body in the cast copper stave is of great significance to promote the popularization and use of the cast copper stave

Method used

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  • Detection method for melting effect between cast copper cooling wall body for blast furnace and cast-in cooling water pipe for blast furnace
  • Detection method for melting effect between cast copper cooling wall body for blast furnace and cast-in cooling water pipe for blast furnace
  • Detection method for melting effect between cast copper cooling wall body for blast furnace and cast-in cooling water pipe for blast furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The thickness of the rolled copper stepped block is tested ultrasonically. The measured ladder test block is taken from the rolled copper stave body. The step height of the step test block is set to 8mm, 10mm, 20mm, 30mm, 40mm, 60mm, and the width is 60mm. The physical size of the stepped block taken from the rolled copper stave body is shown in the figure image 3 As shown, the ultrasonic flaw detector used is Youlian PSUT-350B full-digital intelligent ultrasonic flaw detector, which uses a φ14mm straight crystal probe and a transmission frequency of 2.6MHz. Zero point correction and sound velocity determination are required before the actual measurement. In this example, the cubic standard thickness test block processed by sampling and processing the rolled copper stave body of 40mm×40mm×40mm is used for straight probe calibration and sound velocity measurement. After the measurement, the sound velocity of ultrasonic waves in the rolled copper stave is 4678m / s. Aft...

Embodiment 2

[0043] The thickness of the cast copper step block is tested by ultrasonic. The measured ladder test block is taken from the cast copper stave body. The height of the steps is set to 8mm, 10mm, 20mm, 30mm, 40mm, 60mm, and the width is 60mm. The physical size of the stepped block taken from the cast copper stave body is shown in the figure Figure 4 shown. The ultrasonic flaw detector used is Youlian PSUT-350B all-digital intelligent ultrasonic flaw detector, which uses a φ14mm straight crystal probe and a transmission frequency of 2.6MHz. Before the actual measurement, it is necessary to use the 40mm×40mm×40mm cast copper stave body to sample and process the cubic standard thickness test block for zero point correction and sound velocity measurement. The engine oil is used as the coupling agent. The cube is taken from the same cast copper stave as the stepped test block. ontology. After measurement, the sound velocity of ultrasonic waves in the cast copper cooling stave is...

Embodiment 3

[0049] Detection of the interface fusion effect between the cast copper stave body and the cast cooling water pipe. The lower part (including the hot surface) of the solid block of the cast copper stave is intercepted, and its front view, top view and schematic diagram of the test point location are as follows Figure 5a , Figure 5b shown. The positions of the test points selected according to the ultrasonic wave are different (see Figure 5b ), the method provided by the invention can realize preliminary determination and quantitative analysis of the fusion rate of the metallurgical bonding between the embedded copper pipe in the cast copper stave and the cast copper stave body.

[0050] Preliminary judgment of fusion effect: directly detect the thickness of the embedded pipe from the hot surface of the cast copper stave, that is, Figure 5a Middle A direction carries out ultrasonic thickness detection. The advantage of adopting this scheme is that the selected point mea...

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Abstract

The invention discloses a detection method for a melting effect between a cast copper cooling wall body for a blast furnace and a cast-in cooling water pipe for the blast furnace. The detection method comprises the steps that 1, a cast copper cooling wall of the cast-in cooling water pipe is split along the plane where the center line of the cast-in cooling water pipe is located, an ultrasonic straight crystal probe connected with an ultrasonic flaw detector is placed in the flat inner side of the cooling water pipe, and the interface melting condition of the cooling water pipe and the hot face side of the cooling wall body is detected; 2, test points I, II, III, IV,..., N-1 and N are selected on the flat face of the cooling water pipe, and detection on the interface melting condition of the cooling water pipe and the hot face side of the cooling wall body is performed by repeatedly utilizing the ultrasonic straight crystal probe; 3, the interface melting condition in the cast copper cooling wall is determined through a melting rate definition formula Z=Y / N*100%, wherein Y represents the interface metallurgy melting point number in ultrasonic detection, and N represents the total position point number of the selected test points. The detection method has the advantages of being high in feasibility, good in detection effect, simple in test method, low in cost and wide in application.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for the fusion effect between a cast copper stave body and a cast-in cooling water pipe, and belongs to the technical field of blast furnace stave quality detection. Background technique [0002] The longevity of the blast furnace has huge economic benefits for the entire ironmaking industry, and the normal forward movement and service life of the stave are one of the important factors affecting the longevity of the blast furnace. With the increasing load of ironmaking blast furnace, the problem of blast furnace life is becoming more and more prominent. As the most important cooling equipment of the blast furnace, the stave has an important impact on the longevity of the blast furnace. Traditional cast iron staves and cast steel staves can no longer meet the longevity requirements of blast furnaces, while copper staves have stronger cooling capacity and longer life, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
CPCG01N29/04
Inventor 范晓明卢献忠万旭伟杨彦芳钟毅
Owner 武钢集团襄阳重型装备材料有限公司
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