Diamond micro-powder aggregate preparation method using magnesia as binder

A technology of diamond micropowder and magnesite, which is applied to chemical instruments and methods, and other chemical processes, can solve problems such as limited service life, reduce binder volume, and large specific surface area, so as to improve service life and efficiency, improve The effect of environmental protection level and simple operation

Active Publication Date: 2016-12-21
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual use process, it is found that because the abrasive is silicon carbide, its hardness is limited higher than that of stone, which cannot meet the ever-increasing efficiency requirements. Due to the limited service life, the discharge of a large number of non-degradable grinding block residues also causes Serious environmental pollution; it is undoubtedly a good choice to replace silicon carbide with diamond, but there is a serious problem: tiny particles are difficult to be firmly bonded by the relatively low-strength magnesite binder, and they are easy to fall off and difficult to play. Advantages of diamond superhardness
In addition, another important reason is that micron-sized diamond single crystal particles have a larger specific surface area. If a higher volume ratio is required in the abrasive tool, the volume of the binder will be reduced, which will also cause stickiness. One of the reasons for the decrease in knot strength
In addition, resin bonded polishing tools also face the same problem

Method used

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  • Diamond micro-powder aggregate preparation method using magnesia as binder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A 0.8 mm pellet was prepared. Its preparation method is as follows:

[0024] step 1):

[0025] a According to the formula of MgCl2: 30 grams, phosphoric acid 3ml, deionized water 100ml, add MgCl2 and phosphoric acid into deionized water in turn, stir until there are no particles, and then make curing agent A.

[0026] b According to the ratio of MgCl2: 40g, phosphoric acid 5ml, and deionized water 100ml, add MgCl2 and phosphoric acid into deionized water in turn, stir until there are no particles, and then make curing agent B.

[0027] c Select 50 grams of diamond single crystal with an average particle size of 0.1 μm, add it to curing agent A and soak for 12 hours (based on the diamond submerged in curing agent A), remove and control to dry for later use.

[0028] Step (2):

[0029] The calcined magnesite and the soaked diamond powder are mixed according to the mass ratio of calcined magnesite:diamond powder=1:1 to form a mixed powder for later use, wherein the part...

Embodiment 2

[0039] A 1.0 mm pellet was prepared. The method for preparing curing agent A and B is the same as in Example 1; wherein the primary aggregates are crushed by natural drying and slightly dry wet material blocks and pass through 14 mesh sieves and remain on 16 mesh sieves, and the average aggregate particle diameter is about 1.0mm; basic aggregates are also sieved in the same way; the rest are the same as in Example 1.

Embodiment 3

[0041] A 1.6 mm pellet was prepared. The method for preparing curing agent A and B is the same as in Example 1; wherein in step (2), calcined magnesite and soaked diamond micropowder are mixed according to mass ratio=1:2 to become mixed powder, and the others are the same; the primary aggregate is Crushed by natural drying and micro-drying wet mass and passed through a 10 mesh sieve and remaining on a 12 mesh sieve, the average particle size of the aggregate is about 1.6mm; the basic aggregate is also sieved in the same way;

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Abstract

The present invention relates to a diamond micro-powder aggregate preparation method using magnesia as a binder. According to the present invention, calcined magnesia is adopted as a main binder component, diamond micro-powder, a curing agent A and a curing agent B are added, and a water chestnut type sugar coating machine is used to complete the diamond micro-powder aggregate preparation, wherein the aggregate has a particle size of 0.8-3.0 mm and contains 25-75% (Wt.) of diamond micro-particles, and the particle size of the diamond micro-particles is 0.1-55 [mu]m; the problems of non-uniform mixing and easy shedding of the diamond micro-powder abrasive material in the magnesia grinding device, the resin fine grinding, super fine grinding and polishing grinding device due to the small particle size and the large specific surface area are solved, the service life and the efficiency of the grinding device are improved, the emission of the non-degradable grinding waste is reduced, the environmental protection level is increased, and the currently-used SiC abrasive material grinding block is replaced; and the method has characteristics of simple operation and low cost, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of diamond tool manufacturing, in particular to a method for agglomerating micron-sized diamond powder, which is mainly used in the manufacture of diamond polishing tools. Background technique [0002] Lingite abrasive tools are mainly used for fine grinding and polishing of hard and brittle materials such as stone. In the traditional manufacturing process, magnesite is mainly used as the binder. Calcined magnesia is mixed with magnesium chloride aqueous solution, and different silicon carbide abrasive grains and dosages are added according to needs, and they are evenly distributed in the working layer of the grinding block. After pressing, hand pounding or pouring, they are formed into abrasive tools of various specifications, called diamond Bitter soil grinder. The use efficiency of magnesite abrasives is mainly reflected in its sharpness and wear resistance. In the actual use process, it is found that because th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
CPCC09K3/1436
Inventor 赵玉成邹芹唐虎赵仕帆李晓普武迪彭冲焦晓晨王明智
Owner YANSHAN UNIV
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