CN112961652B - Production method of polymorphic sapphire grinding material - Google Patents
Production method of polymorphic sapphire grinding material Download PDFInfo
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- CN112961652B CN112961652B CN202110176908.8A CN202110176908A CN112961652B CN 112961652 B CN112961652 B CN 112961652B CN 202110176908 A CN202110176908 A CN 202110176908A CN 112961652 B CN112961652 B CN 112961652B
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1436—Composite particles, e.g. coated particles
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Abstract
The invention relates to a production method of a polymorphic sapphire grinding material, belonging to the technical field of grinding materials. The qualified particle size of the crushed materials is selected by magnetic separation, shaping, screening and wind washing to prepare the F sand sapphire grinding material which can be used for processing and producing a bonded abrasive tool; after the materials crushed by the roller are classified into different granularities by a sectional sieve and a number classifying sieve, the materials are washed and cleaned by wind to prepare the common P sand sapphire grinding material; mixing all the rest materials after the operation, forming an isovolumetric body by wind power selection, and preparing a recrystallized sapphire grinding material by secondary calcination and tempering, wherein the recrystallized sapphire grinding material can be used for processing and producing a coated abrasive tool; and (3) performing static electricity removal treatment on the common P sand sapphire grinding material to obtain the static electricity removed P sand sapphire grinding material. The invention can be used for processing sapphire grinding materials with different form granularities and is used for producing grinding tools of different types.
Description
Technical Field
The invention belongs to the technical field of abrasives, and particularly relates to a production method of a polymorphic sapphire grinding material.
Background
The sapphire grinding material has the advantages of high temperature resistance, corrosion resistance, scouring resistance, low porosity, stable thermal state performance and the like, and is widely used for various grinding tools. The processing of workpieces with higher precision along with the technological progress is a problem which needs to be solved urgently by various grinding tool manufacturers at present. The corundum abrasive in the current domestic and foreign markets is mostly ordinary abrasive particles which are preliminarily prepared, the uniformity and the lightness of the particles are not good enough, and the requirement of manufacturing a high-precision grinding tool of a client can not be met.
Disclosure of Invention
In view of the above problems, the present invention is directed to a method for producing a polymorphic sapphire polishing material. Further promote the degree of consistency and the particle strength of sapphire abrasive material granule on original sapphire abrasive material's basis, make its production demand that is applicable to more accurate grinding apparatus.
In order to achieve the purpose, the invention adopts the specific scheme that:
a production method of a polymorphic sapphire grinding material comprises the following steps:
firstly, according to the mass percentage, 97.5 to 99 percent of high-purity alumina, 0.8 to 2.2 percent of titanium oxide, 0.05 to 0.2 percent of yttrium oxide and 0.01 to 0.1 percent of calcium oxide are proportioned and then added into a spiral mixer to be uniformly stirred; calcining the mixture in a rotary furnace at the temperature of 550 ℃ and 750 ℃ to obtain a pretreated raw material;
secondly, paving 1t of the pretreated raw materials obtained in the first step at the bottom of an electric arc furnace, putting an arc starting rod for ignition, starting melting the materials when the temperature is raised to 2100 ℃, and continuously adding the rest of the pretreated raw materials in batches until the materials are completely melted after the current is stabilized to obtain melted materials;
thirdly, after the molten material obtained in the second step is cooled by water and placed for 48 hours, the molten block is lifted out, coarsely broken by a counterattack type breaker, and then broken by a hammer and respectively added into a roller breaker and a jaw breaker for breaking; wherein the jaw crushing material is obtained after crushing by a jaw crusher, and the roller crushing material is obtained after crushing by a roller crusher;
fourthly, dividing the jaw broken material into a material I and a material II; after the material I is subjected to magnetic separation and shaping to flatten the particle surface, further screening, air washing and shape selection are carried out to select the qualified particle size, so as to prepare the F sand sapphire grinding material without acute angles and in the shape of gem particles;
fifthly, dividing the roller-broken material into a material III and a material IV; after the material III is screened by a sectional screen and a number screen in multiple stages, the material III is washed by wind and is screened out by wind power to obtain a multi-acute-angle and needle-shaped particle common P sand sapphire grinding material;
sixthly, mixing the material II in the fourth step and the residual material I which is not prepared into the F sand sapphire grinding material with the material IV in the fifth step and the residual material III which is not prepared into the common P sand sapphire grinding material, selecting the sapphire grinding material with the shape of the isointegrated particles by wind power selection, and tempering for 1 hour in a tunnel kiln at the temperature of 1300 plus materials and 1500 ℃ to obtain the recrystallized sapphire grinding material;
seventhly, mixing magnesium chloride, sodium chloride and water according to the ratio of 1-3: 1-3: 4-8 to obtain static electricity removing mother liquor; and (4) uniformly coating the static removing mother solution on the surface of the common P sand sapphire grinding material obtained in the fifth step, and drying after uniform coating to obtain the static removing P sand sapphire grinding material.
As a further optimization of the above scheme, the uniformly coating refers to spraying and coating the atomized destaticizing mother liquor on the surface of the common P-sand sapphire grinding material by using an atomizer.
And as a further optimization of the scheme, the drying in the seventh step is drying by using hot air at 120 ℃.
Has the advantages that:
1. the method can be used for preparing polymorphic sapphire grinding materials and is suitable for different requirements. Most of the prepared F sand sapphire grinding material particles are isovolumetric, and the particles have high strength and good wear resistance; the particles of the common P sand sapphire abrasive material are all provided with sharp edges, so that the sapphire abrasive material in the form has better cutting capability; the tempered high-strength sapphire grinding material crystal is denser, so that the high-strength sapphire grinding material crystal has the characteristics of wear resistance and sharpness; the sapphire grinding material after static electricity removal has better static electricity jumping performance and is more suitable for a static sand planting process.
2. The polymorphic sapphire grinding material produced by the method has more uniform particle shape; the sapphire grinding material subjected to high-temperature tempering has higher toughness due to the crystal phase recombination, so that the service life of the sapphire grinding material is effectively prolonged; the static electricity removing treatment enables the sapphire grinding material to have better static electricity jumping performance, so that the sapphire grinding material on the manufactured grinding tool is more uniformly distributed and cannot scratch an object.
Detailed Description
A process for preparing the multi-form sapphire grinding material includes such steps as proportionally mixing raw materials, smelting, crushing, shaping and sieving. After the crushed materials are subjected to magnetic separation and shaping to enable the particle surfaces to be smooth, then the materials are further screened and washed by wind to obtain qualified particle sizes, and the F sand sapphire grinding material without acute angles and in the shape of gem particles is prepared and can be used for processing and producing a bonded grinding tool; after the materials crushed by the roller are classified into different granularities by a sectional sieve and a number classifying sieve, the materials are washed and cleaned by wind to prepare the needle-shaped common P sand sapphire grinding material with multiple acute angles; mixing the residual materials after the jaw crushing and crushing, the residual materials after the roller crushing and the residual materials after the F sand and the P sand are prepared, carrying out wind power selection to obtain an isovolumetric body, carrying out secondary calcination and tempering to prepare a recrystallized sapphire grinding material, wherein part of crystal phases are recombined in the tempering process, the particle size is changed, the internal stress of crystals is reduced, the toughness of the product is improved, and the method can be used for processing and producing coated grinding tools; and (3) performing static electricity removal treatment on the common P sand sapphire grinding material to obtain the static electricity removed P sand sapphire grinding material.
The selection is to separate isometric particles from needle flake particles by a wind power particle separator; the static electricity removing treatment is to carry out special liquid medicine treatment on sapphire grinding material particles, wherein the liquid medicine is magnesium chloride, sodium chloride and water according to the weight ratio of 1-3: 1-3: mixing the obtained aqueous solution at a weight ratio of 4-8.
The invention can process sapphire grinding materials with different shape and grain sizes and is used for producing different types of grinding tools.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
Example 1
A production method of a polymorphic sapphire grinding material comprises the following specific steps:
firstly, 97.8 percent of high-purity alumina, 2 percent of titanium oxide, 0.15 percent of yttrium oxide and 0.05 percent of calcium oxide are proportioned according to the proportion, then the mixture is added into a spiral mixer to be uniformly stirred, and is calcined by a rotary furnace at 600 ℃, organic harmful components in the material are completely burnt out, and the pretreated raw material is obtained.
And secondly, paving 1t of the pretreated raw materials at the bottom of the electric arc furnace, putting an arc starting rod for ignition, starting melting the materials when the temperature is raised to 2100 ℃, and continuously adding the rest of the pretreated raw materials in batches after the current is stabilized until the materials are completely melted to obtain the melted materials.
And thirdly, placing the molten material in water for 48 hours, then lifting the fusion cake out, roughly breaking the fusion cake by using a counterattack type crusher, and then breaking the fusion cake by using a roller and a jaw after breaking the fusion cake by using a hammer. Wherein, the jaw broken material is obtained after jaw breaking, and the roller broken material is obtained after roller breaking.
Fourthly, dividing the jaw broken material into a material I and a material II; after the material I is subjected to magnetic separation and shaping to enable the particle surface to be flat, further screening to obtain F8-0, air washing and selecting the qualified particle size, and obtaining an F sand sapphire grinding material without acute angles and in the shape of gem particles;
fifthly, dividing the roller-broken material into a material III and a material IV; after the material III is sieved by a sectional sieve and a number-sieving multi-stage sieve into different particle sizes P8-P240, the material is washed by wind and is selected by wind power to obtain a multi-acute-angle and needle-shaped particle common P sand sapphire grinding material;
sixthly, mixing the material II in the fourth step and the residual material I which is not prepared into the F sand sapphire grinding material with the material IV in the fifth step and the residual material III which is not prepared into the common P sand sapphire grinding material, selecting the sapphire grinding material with the shape of the isointegrated particles by wind power selection, and tempering for 1 hour in a tunnel kiln at the temperature of 1300 plus materials and 1500 ℃ to obtain the recrystallized sapphire grinding material;
seventhly, mixing magnesium chloride, sodium chloride and water according to the weight ratio of 2: 1: 7 to obtain static electricity removing mother liquor, and uniformly coating the static electricity removing mother liquor on the surface of the common P sand sapphire grinding material obtained in the fifth step by an atomizer; and after uniform coating, drying the mixture by hot air at 120 ℃ to obtain the static-free P sand sapphire grinding material.
Example 2
A production method of a polymorphic sapphire grinding material specifically comprises the following operations:
the first to fifth steps are the same as in example 1.
And sixthly, selecting the sapphire grinding material with the shape of the integrated particles by wind power selection, and tempering for 1 hour in a tunnel kiln at 1400 ℃ to obtain the recrystallized sapphire grinding material.
Seventhly, mixing magnesium chloride, sodium chloride and water according to the proportion of 3: 1: 6 to obtain static electricity removing mother liquor, and uniformly coating the static electricity removing mother liquor on the surface of the common P sand sapphire grinding material obtained in the fifth step by an atomizer; and after uniform coating, drying the mixture by hot air at 120 ℃ to obtain the static-free P sand sapphire grinding material.
Example 3
A production method of a polymorphic sapphire grinding material specifically comprises the following operations:
the first to fifth steps are the same as in example 1.
And sixthly, selecting the sapphire grinding material with the shape of the integrated particles by wind power selection, and tempering in a tunnel kiln at 1500 ℃ to obtain the recrystallized sapphire grinding material.
Seventhly, mixing magnesium chloride, sodium chloride and water according to the weight ratio of 2: 2: 6 to obtain static electricity removing mother liquor, and uniformly coating the static electricity removing mother liquor on the surface of the common P sand sapphire grinding material obtained in the fifth step by an atomizer; and after uniform coating, drying the mixture by hot air at 120 ℃ to obtain the static-free P sand sapphire grinding material.
The properties of the sapphire abrasive materials of various forms produced in examples 1 to 3 were evaluated, and the results are shown in the following table.
Experimental comparative values: the existing sapphire grinding material in the market is used as a reference value, the detection result is based on the reference value, and the obtained detection value is not an actual value according to performance improvement.
It should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the invention, which is defined by the appended claims. It will be apparent to those skilled in the art that certain insubstantial modifications and adaptations of the present invention can be made without departing from the spirit and scope of the invention.
Claims (3)
1. A production method of polymorphic sapphire grinding material is characterized in that: the method comprises the following steps:
firstly, according to the mass percentage, 97.5 to 99 percent of high-purity alumina, 0.8 to 2.2 percent of titanium oxide, 0.05 to 0.2 percent of yttrium oxide and 0.01 to 0.1 percent of calcium oxide are proportioned and then added into a spiral mixer to be uniformly stirred; calcining the mixture in a rotary furnace at the temperature of 550 ℃ and 750 ℃ to obtain a pretreated raw material;
secondly, paving 1t of the pretreated raw materials obtained in the first step at the bottom of an electric arc furnace, putting an arc starting rod for ignition, starting melting the materials when the temperature is raised to 2100 ℃, and continuously adding the rest of the pretreated raw materials in batches until the materials are completely melted after the current is stabilized to obtain melted materials;
thirdly, after the molten material obtained in the second step is cooled by water and placed for 48 hours, the molten block is lifted out, coarsely broken by a counterattack type breaker, and then broken by a hammer and respectively added into a roller breaker and a jaw breaker for breaking; wherein the jaw crushing material is obtained after crushing by a jaw crusher, and the roller crushing material is obtained after crushing by a roller crusher;
fourthly, dividing the jaw broken material into a material I and a material II; after the material I is subjected to magnetic separation and shaping to flatten the particle surface, further screening, air washing and shape selection are carried out to select the qualified particle size, so as to prepare the F sand sapphire grinding material without acute angles and in the shape of gem particles;
fifthly, dividing the roller-broken material into a material III and a material IV; after the material III is screened by a sectional screen and a number screen in multiple stages, the material III is washed by wind and is screened out by wind power to obtain a multi-acute-angle and needle-shaped particle common P sand sapphire grinding material;
sixthly, mixing the material II in the fourth step and the residual material I which is not prepared into the F sand sapphire grinding material with the material IV in the fifth step and the residual material III which is not prepared into the common P sand sapphire grinding material, selecting the sapphire grinding material with the shape of the isointegrated particles by wind power selection, and tempering for 1 hour in a tunnel kiln at the temperature of 1300 plus materials and 1500 ℃ to obtain the recrystallized sapphire grinding material;
seventhly, mixing magnesium chloride, sodium chloride and water according to the ratio of 1-3: 1-3: 4-8 to obtain static electricity removing mother liquor; and (4) uniformly coating the static removing mother solution on the surface of the common P sand sapphire grinding material obtained in the fifth step, and drying after uniform coating to obtain the static removing P sand sapphire grinding material.
2. The production method according to claim 1, characterized in that: the uniform coating refers to that the static electricity removing mother liquor is atomized by an atomizer and then sprayed and coated on the surface of the common P sand sapphire grinding material.
3. The production method according to claim 1, characterized in that: and seventhly, drying by adopting hot air at 120 ℃.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108163859A (en) * | 2018-01-02 | 2018-06-15 | 宁夏星辰新材料有限公司 | A kind of production technology of silicon carbide sand |
| CN108751960A (en) * | 2018-07-10 | 2018-11-06 | 哈尔滨工业大学 | A kind of method that high-temperature fusant water fog method prepares alumina base solid solution ceramic powder and micron |
| CN110180662A (en) * | 2019-05-30 | 2019-08-30 | 山东鲁信四砂泰山磨料有限公司 | The preparation process of schmigel |
| CN110436453A (en) * | 2019-07-27 | 2019-11-12 | 河南克拉钻石有限公司 | A kind of production method of diamond shaping material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8481438B2 (en) * | 2008-06-13 | 2013-07-09 | Washington Mills Management, Inc. | Very low packing density ceramic abrasive grits and methods of producing and using the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108163859A (en) * | 2018-01-02 | 2018-06-15 | 宁夏星辰新材料有限公司 | A kind of production technology of silicon carbide sand |
| CN108751960A (en) * | 2018-07-10 | 2018-11-06 | 哈尔滨工业大学 | A kind of method that high-temperature fusant water fog method prepares alumina base solid solution ceramic powder and micron |
| CN110180662A (en) * | 2019-05-30 | 2019-08-30 | 山东鲁信四砂泰山磨料有限公司 | The preparation process of schmigel |
| CN110436453A (en) * | 2019-07-27 | 2019-11-12 | 河南克拉钻石有限公司 | A kind of production method of diamond shaping material |
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