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A device and method for rotating and centrifuging to extract tiny particles in solution

A rotating centrifugal, tiny particle technology, applied in the field of metal physics research, can solve the problems of difficulty in obtaining a large number of evenly distributed inclusion particles, difficulty in preserving inclusions, and difficulty in efficiently removing impurity particles.

Active Publication Date: 2021-08-20
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of device and method that utilizes the rotating centrifugation mode to extract the tiny particle in the solution, solves the following technical problem that the existing chemical or electrolytic erosion matrix method extracts the second phase particle in the metal material: (1) it is difficult Obtain a large number of evenly distributed inclusion particles; (2) It is difficult to efficiently remove impurity particles in the liquid; (3) It is difficult to preserve all types of inclusions

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  • A device and method for rotating and centrifuging to extract tiny particles in solution
  • A device and method for rotating and centrifuging to extract tiny particles in solution
  • A device and method for rotating and centrifuging to extract tiny particles in solution

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Embodiment 1

[0045] Such as Figure 1-Figure 2 As shown, a device and method for extracting tiny particles in a solution by rotating and centrifuging in this embodiment extracts non-metallic inclusions in steel. The specific steps are as follows:

[0046] Step 1. Hold the liquid and calibrate the level

[0047] After the steel matrix is ​​eroded by organic liquid electrolysis or acid solution, a solution containing second-phase particles is obtained. The general electrolyte is triethanolamine volume fraction 3-10%, glycerol volume fraction 3-10%, tetramethyl The mass fraction of ammonium chloride is 1~3%, the rest is methanol, the electrolysis time is 6~8h, and the current density is 40~60mA / cm 2 ; The acid used in the acid-soluble method is an aqueous hydrochloric acid solution with a volume ratio of 1:1 diluted with an inorganic solvent, and the dissolution time is about 8 hours. After ultrasonic treatment of the solution in the beaker for 2 to 4 minutes, pour the solution into the wat...

Embodiment 2

[0055] Such as Figure 1-Figure 2As shown, a device and method for extracting tiny particles in a solution by rotating and centrifuging in this embodiment is used to extract carbides in steel. The rotational angular velocity of the dish is 1-2rad / s, and the amplitude is 8mm; in the particle separation process of step 3, the center of rotation is guaranteed to change at a constant speed, and its trajectory is on a circle with the lowest point of the watch dish as the center and a diameter range of 5-7mm. , the movement speed of the rotation center point is 0.25mm / s, and then superimposed the circular movement with a speed of 1~2rad / s, the maximum amplitude is 8mm, and this movement mode lasts for 200s.

Embodiment 3

[0057] Such as Figure 1-Figure 2 As shown, a device and method for extracting tiny particles in a solution by rotating and centrifuging in this embodiment extracts micron-sized and nano-sized pure copper particles. During the process, the mechanical arm 7 is no longer needed to send the electromagnet 6 to the top of the watch glass 5 for magnetic particle adsorption. The watch glass has a rotational angular velocity of 2-3 rad / s and an amplitude of 6 mm. During the particle separation process in Step 3, ensure that the center of rotation changes at a constant speed, and its trajectory is on a circle with the lowest point of the watch glass as the center and a diameter range of 7 to 10 mm. The movement speed of the center of rotation is 0.3 mm / s. Then superimpose the circular motion with the rotational speed of 2-3 rad / s, the maximum amplitude is 6 mm, and this motion mode lasts for 200 s.

[0058] Such as image 3 As shown, from the three-dimensional appearance of non-metal...

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Abstract

The invention relates to the technical field of metal physics research, in particular to a device and method for rotating and centrifuging to extract tiny particles in a solution. The device includes a control panel, a control cabinet, a servo motor electric push rod, a support platform, a watch glass, an electromagnet, a mechanical arm, a pipette, a liquid storage cylinder, a sealing cover, an ultrasonic generator, a level indicator, etc. The control elements and circuits are packaged in the electric control cabinet, which is connected with the control panel and the mechanical part. The movement mode and movement parameters of the mechanical part are adjusted through the program setting of the control panel. The watch glass containing the target solution is fixed on the support platform, and the target movement mode of the solution inside the watch glass is realized by the action of the electric push rod of the servo motor. . The invention combines a digital control system and a mechanical action device together with an automatic solution adding and removing system and an electromagnet automatic adsorption device, which greatly simplifies the operational difficulty of the experimental process and effectively avoids operational errors in the experimental process.

Description

technical field [0001] The invention relates to the technical field of metal physics research, and specifically refers to a device and method for rotating and centrifuging to extract tiny particles in a solution. The metal matrix is ​​eroded by chemical or electrolytic methods, and the second phase particles in the metal are extracted into the solution. The second phase particles (including inclusions, carbides, other particles, etc.) in the metal in the solution are separated and purified by centrifugation. Background technique [0002] The second phase particles in metal materials directly affect the properties of metals. Therefore, the type, quantity, size, shape and distribution of the second phase particles are important indicators for evaluating the quality of metal materials. The second-phase particles in metallic materials are generally small in size, but have a large scale span, often in the nanoscale, micron-scale or even millimeter-scale. For the study of the se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/32G01N1/34C25F3/06C23F1/28
CPCC23F1/28C25F3/06G01N1/28G01N1/286G01N1/32G01N1/34
Inventor 刘洋李殿中王培刘连
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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