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Composite grinding medium for grinding machine and preparation method of composite grinding medium

A grinding medium and grinding machine technology, applied in chemical instruments and methods, other chemical processes, cement production, etc., can solve the problems of poor dispersibility of raw material powder, high grinding cost, and poor hardness of ceramic grinding bodies.

Inactive Publication Date: 2022-08-02
安徽致磨新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a kind of composite grinding medium for grinding machine and preparation method thereof: by adding modified silicon carbide, boron carbide, phenolic resin and ball milling accelerator to ball milling in a ball mill jar, obtain Medium slurry, the medium slurry is dried and granulated by a spray dryer to obtain medium powder, and the medium powder is rolled into a ball machine to form a medium ball blank, and then the ball blank is sintered and cooled The medium coarse material is obtained, the medium coarse material is self-grinding and polished, and the size is screened to obtain a composite grinding medium for the grinding machine, which solves the problem of poor dispersion and easy agglomeration of the raw material powder used in the existing ceramic grinding body, which leads to the ceramic grinding obtained by final sintering. The internal density of the body is not uniform enough, resulting in poor hardness and high wear of the ceramic grinding body, resulting in high grinding costs

Method used

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  • Composite grinding medium for grinding machine and preparation method of composite grinding medium

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Embodiment 1

[0046] The present embodiment is a preparation method of modified silicon carbide, comprising the following steps:

[0047] S1: Add 10g of silicon carbide powder, 75mL of anhydrous ethanol and distilled water to a mixed solvent with a volume ratio of 1:5 and 0.15g of ethyl orthosilicate into a three-necked flask equipped with a stirrer and a thermometer, and then add Ammonia water with a mass fraction of 15% was used to adjust the pH of the mixed solvent to 9, and then the reaction was stirred for 3 hours at a temperature of 20 °C and a stirring rate of 300 r / min. After the reaction, the reaction product was washed twice with distilled water, and then placed in a vacuum. In a drying oven, drying to constant weight at a temperature of 70 °C to obtain pretreated silicon carbide;

[0048] S2: Add 10g of pretreated silicon carbide to 75mL of mixed solvent for ultrasonic dispersion for 30min, then add it to a three-necked flask equipped with a stirrer and a thermometer, then add 0....

Embodiment 2

[0050] The present embodiment is a preparation method of modified silicon carbide, comprising the following steps:

[0051] S1: Add 10g of silicon carbide powder, 100mL of anhydrous ethanol and distilled water according to the volume ratio of 1:5 mixed solvent and 0.35g of ethyl orthosilicate into a three-necked flask equipped with a stirrer and a thermometer, and then add Ammonia water with a mass fraction of 20% was used to adjust the pH of the mixed solvent to 10, and then the reaction was stirred for 4 hours at a temperature of 30 °C and a stirring rate of 400 r / min. After the reaction, the reaction product was washed three times with distilled water, and then placed in a vacuum In a drying oven, drying to constant weight at a temperature of 80 °C to obtain pretreated silicon carbide;

[0052] S2: Add 10g of pretreated silicon carbide to 100mL of mixed solvent for ultrasonic dispersion for 50min, then add it to a three-necked flask equipped with a stirrer and a thermometer...

Embodiment 3

[0054] The present embodiment is a preparation method of a ball milling accelerator, comprising the following steps:

[0055] S11: Add 0.1mol 4-nitroacetophenone and 30mL absolute ethanol into a three-necked flask equipped with a stirrer, a thermometer, a constant pressure dropping funnel and a reflux condenser, then at a temperature of 20°C and a stirring rate of 200r 13.5 mL of thionyl chloride was added dropwise with stirring at the condition of At room temperature, 120 mL of saturated ammonium chloride solution was added to continue stirring for 10 min, followed by vacuum filtration, the filter cake was placed in a vacuum drying oven, and dried to a constant weight at a temperature of 50 °C to obtain Intermediate A;

[0056] S12: add 10g of Intermediate A, 0.6g of 10% palladium-carbon and 100mL of absolute ethanol to a three-necked flask equipped with a stirrer, a thermometer, a constant-pressure dropping funnel and a reflux condenser, then at a temperature of 80°C, the st...

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Abstract

The invention relates to the field of grinding media, and aims at solving the problems that raw material powder used by an existing ceramic grinding body is poor in dispersity and easy to agglomerate, so that the internal density of the ceramic grinding body obtained through final sintering is not uniform enough, the hardness of the ceramic grinding body is poor, abrasion is large, and the grinding cost is high. According to the composite grinding medium for the grinding machine and the preparation method of the composite grinding medium, the grinding medium prepared by taking modified silicon carbide as a main raw material is good in mechanical property and high in wear resistance, so that the service life of the grinding medium is prolonged, and the grinding cost can be reduced while the grinding effect can be guaranteed; the modified silicon carbide has better performance and has a forward promotion effect on the performance of the grinding medium, and the dispersity of the silicon carbide can be modified by using the ball milling accelerant, so that the phenomenon that the internal connection of the grinding medium is not tight enough due to agglomeration of the modified silicon carbide is avoided, and the service life of the grinding medium is prolonged. And the mechanical property and wear resistance of the grinding medium are further improved.

Description

technical field [0001] The invention relates to the field of grinding media, in particular to a composite grinding medium for a grinding machine and a preparation method thereof. Background technique [0002] At present, the ultrafine powder industry is developing rapidly, and the indispensable equipment for its development are ball mills and sand mills. Grinding media must be used in these equipments. Because the particle morphology of products ground by ball mills is close to spherical, it conforms to the requirements of powder products. Technical requirements, so ball mill is the most commonly used equipment for powder processing. With the development of science and technology, higher requirements are also put forward for powder processing technology; [0003] At present, most of the grinding bodies used in ball mills in my country are metal (steel, iron) grinding bodies, that is, steel balls and steel segments are usually used. Due to the low useful work of the ball mill...

Claims

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Application Information

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IPC IPC(8): C09K3/14
CPCC09K3/1436Y02P40/10
Inventor 孟超任永国朱振宇魏小威
Owner 安徽致磨新材料科技有限公司
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