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Diamond abrasive and preparation method thereof

A diamond and diamond micropowder technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem that graphite and metal impurities cannot be effectively removed

Pending Publication Date: 2022-04-15
HENAN UNION ABRASIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing diamond abrasives, which is used to solve the problem that graphite and metal impurities in diamond micropowder cannot be effectively removed in the acid treatment purification process used in the current diamond abrasive production process

Method used

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  • Diamond abrasive and preparation method thereof
  • Diamond abrasive and preparation method thereof
  • Diamond abrasive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of the diamond abrasive of the present embodiment may further comprise the steps:

[0037] (1) Put 5000g of ball-milled diamond micropowder into the roasting furnace tray (the charging thickness of the diamond micropowder after shaping is 1.5cm), put the tray into the roasting furnace, and roast under the condition that the roasting temperature is 380°C 1h, after the roasting is finished, cool down to room temperature through the air blowing system of the roasting furnace.

[0038] (2) Add 6000mL sulfuric acid solution in the 10L glass reactor (the sulfuric acid solution is obtained by mixing concentrated sulfuric acid and water with a volume ratio of 1:1, and the mass fraction of concentrated sulfuric acid is 98%), 50g sodium chloride, 4000g roasted Diamond micropowder, then energized and heated, so that the system in the glass reactor is pickled under the condition of stirring and temperature at 180°C. The pickling time is 1h. After the pickling...

Embodiment 2

[0041] The preparation method of the diamond abrasive of the present embodiment may further comprise the steps:

[0042] (1) Put 5000g of ball-milled diamond micropowder into the roasting furnace tray (the charging thickness of the diamond micropowder after shaping is 1.5cm), put the tray into the roasting furnace, and roast under the condition that the roasting temperature is 420°C 2h, after the roasting is finished, cool down to room temperature through the air blowing system of the roasting furnace.

[0043] (2) Add 6000mL hydrochloric acid solution (hydrochloric acid solution is obtained by mixing concentrated hydrochloric acid and water with a volume ratio of 1:1, the mass fraction of concentrated hydrochloric acid is 38%), 4000g of calcined diamond micropowder, and then plastic Put the bucket in a water bath at 100°C and heat and stir for 1 hour to carry out pickling. After the pickling, stop stirring until the pickled diamond powder is completely precipitated, pour out ...

Embodiment 3

[0046] The preparation method of the diamond abrasive of the present embodiment may further comprise the steps:

[0047] (1) Put 5000g of ball-milled diamond micropowder into the roasting furnace tray (the charging thickness of the diamond micropowder after shaping is 1.5cm), put the tray into the roasting furnace, and roast under the condition of 400°C at the roasting temperature 2h, after the roasting is finished, cool down to room temperature through the air blowing system of the roasting furnace.

[0048] (2) Add 5000mL sulfuric acid solution (the sulfuric acid solution is obtained by mixing concentrated sulfuric acid and water with a volume ratio of 3:7 in a 10L plastic barrel, the mass fraction of concentrated sulfuric acid is 98%), 50g sodium chloride, diamond after 4000g roasting Then put the plastic bucket in a water bath at 100°C and heat and stir for 1 hour for pickling. After the pickling, stop stirring until the pickled diamond powder is completely precipitated. P...

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Abstract

The invention relates to a diamond abrasive and a preparation method thereof, and belongs to the technical field of superhard materials. The preparation method of the diamond abrasive material comprises the following steps: carrying out oxidation treatment on shaped diamond micro-powder to oxidize impurities on the surface of the diamond micro-powder, and then carrying out acid pickling. According to the preparation method of the diamond abrasive, graphite and metal impurities on the surface of the diamond micro-powder are oxidized, then acid pickling is conducted, metal impurity oxide is dissolved into soluble salt, the content of superfine particles and impurities attached to the surface of the diamond micro-powder can be reduced, and the influence on subsequent machining and using is reduced; and the thermal stability and the application performance of the prepared diamond abrasive can be improved. In addition, according to the preparation method of the diamond abrasive, the use of a large amount of strong acid is reduced, the process period is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a diamond abrasive and a preparation method thereof, belonging to the technical field of superhard materials. Background technique [0002] As the material with the highest hardness known in the world, diamond products have important applications in the fields of cutting, grinding and polishing. As an extension of diamond fine-grained products, diamond micropowder is a powder with a particle size of 1-70 microns obtained by crushing, shaping, purifying and classifying coarse-grained single-crystal diamonds. [0003] During the crushing process, the crushed material enters the crushing chamber controlled by the electromagnetic valve of the airflow crusher, and the nozzles around the lower part of the chamber spray high-speed airflow to make the material particles collide, shear and grind violently. Fragmentation occurs when the force acting on the particle is greater than its destructive force. The raw materials used in the hi...

Claims

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Application Information

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IPC IPC(8): C09K3/14
CPCC09K3/1409C09K3/1454
Inventor 丁亚男魏广辉胡帅龙汪静
Owner HENAN UNION ABRASIVES
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