Ultra-pure diamond micro-powder

Abstract

The invention belongs to the technical field of diamond micro-powder, and particularly relates to ultra-pure diamond micro-powder, which is prepared by the following steps: (1) material selection and cleaning, (2) crushing and shaping, (3) coarse purification, (4) grading, (5) fine purification, (6) drying, and (7) filling and inspection, through material selection, the purity of the obtained diamond micro-powder can be conveniently purified, through cleaning, the diamond raw material can be conveniently washed and cleaned, and the quality of the diamond micro-powder is improved. Diamond raw materials are prevented from carrying miscellaneous scraps and influencing the purity of the diamond micro-powder during crushing, the diamond micro-powder is conveniently treated through coarse purification, the diamond micro-powder is conveniently selected according to requirements through grading, the diamond micro-powder is conveniently purified again through fine purification, the diamond micro-powder with higher purity is obtained, and the diamond micro-powder with higher purity is obtained through drying. The purified diamond micro-powder is prevented from being condensed.

Description

Technical Field

[0001] The invention belongs to the technical field of diamond micropowder, and in particular relates to ultrapure diamond micropowder. Background Art

[0002] Diamond powder refers to diamond particles with a particle size of finer than 54 microns, including single crystal diamond powder and polycrystalline diamond powder. Due to the large output of single crystal diamond powder and its wide application field, the industry generally refers to single crystal diamond powder. Single crystal diamond powder is produced by static pressure method artificial diamond single crystal abrasive, which is crushed and shaped by special process of superhard materials.

[0003] In order to obtain diamond micropowder with higher purity during the production of diamond micropowder, a method for preparing ultrapure diamond micropowder is proposed. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides an ultra-pure diamond powder, which has the characteristic of convenient operation.

[0005] To achieve the above object, the present invention provides the following technical solution: an ultrapure diamond powder, comprising the following steps:

[0006] (1) Material selection and cleaning: Select diamond raw materials with uniform size, regular shape and no obvious defects for use, stir and rinse the selected diamond raw materials, and clean the debris adhered to the diamond raw materials;

[0007] (2) Crushing and shaping: The cleaned diamond raw material is crushed and placed in a ball mill for shaping to obtain diamond particles that meet the requirements and have uniform particle size;

[0008] (3) Rough purification: Weigh a certain weight of diamond powder, put it into an acid-resistant and high-temperature resistant container, add an appropriate amount of acid solution (concentrated sulfuric acid, industrial pure nitric acid and the strongest inorganic acid perchloric acid), place the container on an industrial electric furnace and heat it. As the temperature rises, the reaction becomes increasingly intense. After the reaction stops completely, stop heating and remove the container from the heat source. After the material cools to room temperature, pour out the waste acid solution on the upper layer;

[0009] (4) Classification: Place the coarsely purified diamond powder in an overflow classification container. Water enters the lower cone of the container from the bottom. As the cross-section of the classification container gradually expands, the rising speed of the fluid gradually slows down and finally stabilizes in the upper cylindrical cylinder. The particles settle against the rising water flow. When the flow rate is stable, the particles of a certain size will be in a suspended state neither rising nor sinking due to the combined effect of gravity and the reverse push of the water flow. When the two forces reach equilibrium, the particles will be in a suspended state with neither rising nor sinking. Too fine particles will overflow the classification container with the water flow. When too coarse particles sink into the lower cone, due to the increase in fluid speed, they will also be suspended at different heights according to the particle size. By adjusting the flow rate, products of corresponding particle sizes can be obtained, thereby completing the classification operation of diamond powder;

[0010] (5) Fine purification: The classified diamond powder is placed in a bag made of silk, chemical fiber or other corrosion-resistant materials, and an anode plate is inserted into the bag. The bag is then hung and inserted into an electrolytic cell. Then, an electrolytic aqueous solution is added to the electrolytic cell. The liquid level should be higher than the bag opening of the diamond powder. A cathode plate is then hung in the electrolytic cell and electricity is turned on for electrolysis. After 72-144 hours of electrolysis, the metal contained in the diamond powder enters the electrolyte through the action of the current and precipitates on the cathode plate. After the metal in the diamond block is completely precipitated, the cathode plate with the precipitated metal is taken out to obtain the electrolyzed diamond powder;

[0011] (6) Drying: Place the purified diamond powder in an industrial electric furnace for drying to avoid condensation;

[0012] (7) Filling and inspection: The processed diamond powder is placed in the bottle and inspected by staff.

[0013] Preferably, in step (1), water is pumped by a high-pressure water pump to rinse and clean the selected diamond raw material, and then the diamond raw material is crushed by a crusher to obtain diamond particles of different sizes.

[0014] Preferably, in step (6), the purified diamond micropowder is placed in an industrial electric furnace for heating and drying, and the processed and dried diamond micropowder is stirred by a stirring assembly to make the drying more uniform.

[0015] Preferably, in step (7), the processed diamond micropowder is bottled and labeled, and staff distinguishes and performs sampling inspection on the bottled diamond micropowder.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention facilitates the purification of the obtained diamond micropowder through material selection, facilitates the purification of the diamond micropowder to be more portable, facilitates the flushing and cleaning of the diamond raw material through cleaning, avoids debris carried by the diamond raw material when it is crushed, and affects the purity of the diamond micropowder, facilitates the processing of the diamond micropowder through rough purification, facilitates the selection of diamond micropowder according to needs through classification, facilitates the re-purification of the diamond micropowder through fine purification to obtain diamond micropowder with higher purity, and avoids the coagulation of the purified diamond micropowder through drying. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1

[0020] The present invention provides the following technical solution: an ultrapure diamond powder, comprising the following steps:

[0021] (1) Material selection and cleaning: Select diamond raw materials with uniform size, regular shape and no obvious defects for use, stir and rinse the selected diamond raw materials, and clean the debris adhered to the diamond raw materials;

[0022] (2) Crushing and shaping: The cleaned diamond raw material is crushed and placed in a ball mill for shaping to obtain diamond particles that meet the requirements and have uniform particle size;

[0023] (3) Rough purification: Weigh a certain weight of diamond powder, put it into an acid-resistant and high-temperature resistant container, add an appropriate amount of acid solution (concentrated sulfuric acid, industrial pure nitric acid and the strongest inorganic acid perchloric acid), place the container on an industrial electric furnace and heat it. As the temperature rises, the reaction becomes increasingly intense. After the reaction stops completely, stop heating and remove the container from the heat source. After the material cools to room temperature, pour out the waste acid solution on the upper layer;

[0024] (4) Classification: Place the coarsely purified diamond powder in an overflow classification container. Water enters the lower cone of the container from the bottom. As the cross-section of the classification container gradually expands, the rising speed of the fluid gradually slows down and finally stabilizes in the upper cylindrical cylinder. The particles settle against the rising water flow. When the flow rate is stable, the particles of a certain size will be in a suspended state neither rising nor sinking due to the combined effect of gravity and the reverse push of the water flow. When the two forces reach equilibrium, the particles will be in a suspended state with neither rising nor sinking. Too fine particles will overflow the classification container with the water flow. When too coarse particles sink into the lower cone, due to the increase in fluid speed, they will also be suspended at different heights according to the particle size. By adjusting the flow rate, products of corresponding particle sizes can be obtained, thereby completing the classification operation of diamond powder;

[0025] (5) Fine purification: The classified diamond powder is placed in a bag made of silk, chemical fiber or other corrosion-resistant materials, and an anode plate is inserted into the bag. The bag is then hung and inserted into an electrolytic cell. Then, an electrolytic aqueous solution is added to the electrolytic cell. The liquid level should be higher than the bag opening of the diamond powder. A cathode plate is then hung in the electrolytic cell and electricity is turned on for electrolysis. After 72-144 hours of electrolysis, the metal contained in the diamond powder enters the electrolyte through the action of the current and precipitates on the cathode plate. After the metal in the diamond block is completely precipitated, the cathode plate with the precipitated metal is taken out to obtain the electrolyzed diamond powder;

[0026] (6) Drying: Place the purified diamond powder in an industrial electric furnace for drying to avoid condensation;

[0027] (7) Filling and inspection: The processed diamond powder is placed in the bottle and inspected by staff.

[0028] Specifically, in step (1), water is pumped by a high-pressure water pump to rinse and clean the selected diamond raw material, and then the diamond raw material is crushed by a crusher to obtain diamond particles of different sizes.

[0029] Specifically, in step (6), the purified diamond micropowder is placed in an industrial electric furnace for heating and drying, and the processed and dried diamond micropowder is stirred by a stirring component to make the drying more uniform.

[0030] Specifically, in step (7), the processed diamond micropowder is bottled and labeled, and the staff distinguishes and performs sampling inspection on the bottled diamond micropowder.

[0031] The working principle and use process of the present invention are as follows: the present invention selects raw materials, then rinses and cleans the selected diamond raw materials to facilitate crushing operations and avoid carrying debris to affect purity, and then puts the raw materials into a crusher for crushing operations. After crushing, the diamond micropowder is placed in an acid-resistant and high-temperature resistant container, and the diamond micropowder is roughly purified by a chemical method. The roughly purified diamond micropowder is placed in an overflow classification container, and the classification operation is performed by the overflow method. The classified diamond micropowder is then loaded into bags made of silk, chemical fiber materials or other corrosion-resistant materials, and the diamond micropowder is finely purified by an electrolytic method to obtain diamond micropowder with higher purity. The purified diamond micropowder is placed in an industrial electric furnace for drying to avoid condensation, and is easily distinguished by filling marks.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultrapure diamond powder, comprising the following steps: Features: (1) Material selection and cleaning: Select diamond raw materials with uniform size, regular shape and no obvious defects for use, stir and rinse the selected diamond raw materials, and clean the debris adhered to the diamond raw materials; (2) Crushing and shaping: The cleaned diamond raw material is crushed and placed in a ball mill for shaping to obtain diamond particles that meet the requirements and have uniform particle size; (3) Rough purification: Weigh a certain weight of diamond powder, put it into an acid-resistant and high-temperature resistant container, add an appropriate amount of acid solution (concentrated sulfuric acid, industrial pure nitric acid and the strongest inorganic acid perchloric acid), place the container on an industrial electric furnace and heat it. As the temperature rises, the reaction becomes increasingly intense. After the reaction stops completely, stop heating and remove the container from the heat source. After the material cools to room temperature, pour out the waste acid solution on the upper layer; (4) Classification: Place the coarsely purified diamond powder in an overflow classification container. Water enters the lower cone of the container from the bottom. As the cross-section of the classification container gradually expands, the rising speed of the fluid gradually slows down and finally stabilizes in the upper cylindrical cylinder. The particles settle against the rising water flow. When the flow rate is stable, the particles of a certain size will be in a suspended state neither rising nor sinking due to the combined effect of gravity and the reverse push of the water flow. When the two forces reach equilibrium, the particles will be in a suspended state with neither rising nor sinking. Too fine particles will overflow the classification container with the water flow. When too coarse particles sink into the lower cone, due to the increase in fluid speed, they will also be suspended at different heights according to the particle size. By adjusting the flow rate, products of corresponding particle sizes can be obtained, thereby completing the classification operation of diamond powder; (5) Fine purification: The classified diamond powder is placed in a bag made of silk, chemical fiber or other corrosion-resistant materials, and an anode plate is inserted into the bag. The bag is then hung and inserted into an electrolytic cell. Then, an electrolytic aqueous solution is added to the electrolytic cell. The liquid level should be higher than the bag opening of the diamond powder. A cathode plate is then hung in the electrolytic cell and electricity is turned on for electrolysis. After 72-144 hours of electrolysis, the metal contained in the diamond powder enters the electrolyte through the action of the current and precipitates on the cathode plate. After the metal in the diamond block is completely precipitated, the cathode plate with the precipitated metal is taken out to obtain the electrolyzed diamond powder. (6) Drying: Place the purified diamond powder in an industrial electric furnace for drying to avoid condensation; (7) Filling and inspection: The processed diamond powder is placed in the bottle and inspected by staff.

2. The ultrapure diamond powder according to claim 1, Features: In the step (1), water is pumped by a high-pressure water pump to rinse and clean the selected diamond raw material, and then the diamond raw material is crushed by a crusher to obtain diamond particles of different sizes.

3. The ultrapure diamond powder according to claim 1, Features: In the step (6), the purified diamond micropowder is placed in an industrial electric furnace for heating and drying, and the processed and dried diamond micropowder is stirred by a stirring assembly to make the drying more uniform.

4. The ultrapure diamond powder according to claim 1, Features: In the step (7), the processed diamond micropowder is bottled and labeled, and the staff distinguishes and performs sampling inspection on the bottled diamond micropowder.