CN101434829A - Novel corundum abrasive and preparation thereof - Google Patents
Novel corundum abrasive and preparation thereof Download PDFInfo
- Publication number
- CN101434829A CN101434829A CNA2008101542933A CN200810154293A CN101434829A CN 101434829 A CN101434829 A CN 101434829A CN A2008101542933 A CNA2008101542933 A CN A2008101542933A CN 200810154293 A CN200810154293 A CN 200810154293A CN 101434829 A CN101434829 A CN 101434829A
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- abrasive
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- corundum abrasive
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Abstract
The invention discloses a novel corundum abrasive, the main crystal phase of which is Al2O3; according to the weight percentage, the raw material of the abrasive comprises 99.15-99.85 percent of Al2(SO4)3 question mark 18H2O or AlNO3 question mark 9H2O, and 0.15-0.85 percent of additive, wherein, according to the weight percentage, the additive comprises 0-25 percent of Ca(NO3)2, 0-15 percent of Fe(NO3)3, 0-10 percent of (CH3CH2O)4Ti, 0-30 percent of Mg(NO3)2, 40-90 percent of C8H20O4Si and 0-8 percent of Sb(CH3COO)3. Ammonia is used as precipitator and wet-chemical method is used for preparing Al(OH)3 solid which is subsequently screen, granulated and sintered at the temperature of 1250-1400 DEG C, thus obtaining the novel corundum abrasive. The shape of the abrasive grain is controllable and the microscopic diameter thereof is ranging from 50nm to 3Mu meters. The novel corundum abrasive reduces the loss of the energy resource, improves the tenacity of the traditional capacitance corundum, improves the grinding application effect and prolongs the service life.
Description
Technical field
The invention relates to abrasive material and preparation method thereof, relate in particular to a kind of corundum abrasive and preparation method thereof.
Background technology
Abrasive material is human used thousands of years that had. in the mankind's period in time immemorial, the primitive man just uses natural abrasive to come the wooden instrument of sharpening. and bone and flint etc.When using natural abrasive, people recognize that gradually nearly all natural abrasive all contains crystalline aluminum oxide, and what can play ablation is exactly crystalline aluminum oxide.Based on this understanding, people begin to manage salic material melting making is become abrasive material, and its ground effect is better than natural abrasive.Frenchman in 1893, fritzs in 1894 obtain the patent right of fusion emery respectively, have started the industrial application of aloxite since then.
Along with the raising of science and technology development and manufacturing technology level, the range of application and the market demand of corundum abrasive are increasing, and variation has also appearred in the kind of corundum, to satisfy different application, as white fused alumina, brown corundum, chromium corundum etc.But over 100 years surplus, though the kind of corundum develops to some extent, performance is difference slightly also, does not fundamentally change the electrically smelting Preparation Method of corundum and the internal crystal structure of corundum, therefore the obvious change that does not also just bring its performance and use properties.But raising along with the modern science and technology level, especially the raising of modern manufacturing industry level, precision, processing quality, working (machining) efficiency to converted products require more and more higher, simultaneously, the appearance of novel material, new processing problems also constantly occurs, and difficulty of processing also continues to increase, and this must propose higher requirement to abrasive material, the grinding tool of carrying processing mission.
Corundum (chemical constitution Al
2O
3) abrasive material is because physical strength height, hardness are big, resistance to chemical attack, lower-price characteristic, is a kind of abrasive material of widespread use in the world at present, is used for the mechanical workouts such as grinding, grinding, polishing in many fields, about 150～1,600,000 tons of annual production.The tradition corundum abrasive adopts the preparation of electric smelting method, and not only power consumption is high, and grain-size is big, and grain-size is generally about 50 μ m.And the grinding effect of aluminum oxide is subjected to the influence of its inner grain size obvious, the fine crystalline structure of abrasive material, can make that its toughness improves, self-sharpening is good, abrasive particle is sharp, wearing and tearing less, cutting power is strong, grinding efficiency is high, improves the result of use and the work-ing life of corundum abrasive and goods thereof.
Along with day being becoming tight of world energy sources, energy-saving and cost-reducingly to be not only enterprise and to reduce cost, the effective way of increasing economic efficiency also is whole society's common responsibility and target.In addition, more and more higher to the requirement of the quality of product, precision along with development of modern science and technology, also nature proposes higher requirement to the processing quality of machining tool, working (machining) efficiency, tooling cost etc.Therefore, performance energy-saving and cost-reducing and the raising corundum abrasive is imperative.
Summary of the invention
The objective of the invention is to reduce the energy consumption that corundum abrasive is produced, the corundum abrasive in a kind of high product performance and higher work-ing life and preparation method thereof is provided.
Novel corundum abrasive of the present invention, its feed composition and weight percent content thereof are Al
2(SO
4)
318H
2O or AlNO
39H
2O 99.15%～99.85%, additive 0.15%～0.85%; Described additive is Ca (NO
3)
2, Fe (NO
3)
3, (CH
3CH
2O)
4Ti, Mg (NO
3)
2, C
8H
20O
4Si, Sb (CH
3COO)
3, its weight percent content that respectively accounts for additive is 0%～25%Ca (NO
3)
2, 0%～15Fe (NO
3)
3, 0%～10% (CH
3CH
2O)
4Ti, 0%～30%Mg (NO
3)
2, 40%～90%C
8H
20O
4Si, 0～8%Sb (CH
3COO)
3
The preparation method of novel corundum abrasive is to adopt wet chemical method and high-temperature calcination, and concrete implementation step is:
(1) with Al
2(SO
4)
318H
2O or AlNO
39H
2O is at first water-soluble, and water-soluble after-filtration is removed impurity, is made into the Al that contains of 0.1 mol～0.2 mol
3+The aqueous solution;
(2) in the aqueous solution of step (1), add ammoniacal liquor and stir and make its complete gelation or precipitation, again through filter, washing, drying process obtain Al (OH)
3Solid;
(3) additive with respective amount joins Al (OH)
3Mixing in the solid; The Al (OH) that will contain additive
3Solid process waits the static pressure granulation, again through ball milling, shake mill, to roll, extrusion process is shaped as the equivalance type, sheet, splinter shape or long column shape, and sieve in advance and classification;
(4) step (3) is sieved in advance with the fractionated abrasive material 1250 ℃～1400 ℃ calcinings, further sieve again, classification, make the novel corundum abrasive of different grain size and particle shape.The micro-grain-size of corundum abrasive granule interior is between 50nm～3 μ m.
The invention has the beneficial effects as follows, reduce the preparation energy that corundum abrasive consumed, changed the microstructure of corundum in granules inside, greatly reduced the grain-size of corundum crystal, improved the toughness of traditional capacitance corundum, improved its grinding effect and processed work-ing life.
The hardness of the hardness of novel corundum abrasive and traditional capacitance corundum is suitable, and toughness reaches 1.3～2 times of the traditional capacitance corundum, grinding efficiency improves more than 25% than fused corundom emery wheel, prolong work-ing life more than 1 times, total ground finish production cost can be reduced to 1/4 of common electric smelting corundum products.
Embodiment
Below in conjunction with embodiment the present invention is further described.
The grinding effect of aluminum oxide is subjected to the influence of its inner grain size obvious, the fine crystalline structure of abrasive material, its toughness is improved, grinding accuracy improves, and what come off in the grinding use is nano level little crystal grain, can improve greatly the work-ing life of grinding tool, exposes countless sharp new swords along with coming off of little crystal grain simultaneously, and grinding efficiency also can improve greatly.Reach the purpose of save energy in view of the foregoing, the present invention adopts wet chemical method to synthesize aluminium-containing substance, prepares novel corundum abrasive through high-temperature calcination again.
Embodiment 1
Adopt 99.85% AlNO
39H
2O and 0.15% additive are raw material, and ammoniacal liquor is that precipitation agent prepares novel corundum abrasive.
At first with AlNO
39H
2The water-soluble after-filtration of O is removed impurity, is made into the Al that contains of 0.1 mol
3+The aqueous solution;
Dropping ammonia and stirring make and contain this Al in above-mentioned solution
3+The complete gelation of the aqueous solution, again through filter, washing, drying process obtain Al (OH)
3Solid;
Additive is joined Al (OH)
3Mixing in the solid; The feed composition of described 0.1% additive and weight percent content thereof are 20%Ca (NO
3)
2, 13%Fe (NO
3)
3, 7% (CH
3CH
2O)
4Ti, 20%Mg (NO
3)
2, 40%C
8H
20O
4Si.
The Al (OH) that will contain additive
3The solid process waits the static pressure granulation, carries out shaping through ball-milling technology again, and sieves in advance and classification;
To carry out the Al (OH) of pre-screening and classification shaping
3Solid is 1400 ℃ of down calcinings, further sieves, classification again, makes varigrained novel corundum abrasive.
Embodiment 2
Adopt 99.6% Al
2(SO
4)
318H
2O and 0.4% additive are raw material, and ammoniacal liquor is that precipitation agent prepares novel corundum abrasive.
At first with Al
2(SO
4)
318H
2The water-soluble after-filtration of O is removed impurity, is made into the Al that contains of 0.15 mol
3+The aqueous solution;
Dropping ammonia and stirring make and contain this Al in above-mentioned solution
3+The complete gelation of the aqueous solution, again through filter, washing, drying process obtain Al (OH)
3Solid;
Additive is joined Al (OH)
3Mixing in the solid; The feed composition of described 0.4% additive and weight percent content thereof are 5%Ca (NO
3)
2, 3%Mg (NO
3)
2, 90%C
8H
20O
4Si, 2%Sb (CH
3COO)
3
The Al (OH) that will contain additive
3The solid process waits the static pressure granulation, carries out shaping through ball-milling technology again, and sieves in advance and classification;
To carry out the Al (OH) of pre-screening and classification shaping
3Solid is 1350 ℃ of down calcinings, further sieves, classification again, makes varigrained novel corundum abrasive.
Embodiment 3
Adopt 99.15% AlNO
39H
2O and 0.85% additive are raw material, and ammoniacal liquor is that precipitation agent prepares novel corundum abrasive.
At first with AlNO
39H
2The water-soluble after-filtration of O is removed impurity, is made into the Al that contains of 0.2 mol
3+The aqueous solution;
Dropping ammonia and stirring make and contain this Al in above-mentioned solution
3+The complete gelation of the aqueous solution, again through filter, washing, drying process obtain Al (OH)
3Solid;
Additive is joined Al (OH)
3Mixing in the solid; The feed composition of described 0.85% additive and weight percent content thereof are 14%Ca (NO
3)
2, 4%Fe (NO
3)
3, 2% (CH
3CH
2O)
4Ti, 12%Mg (NO
3)
2, 60%C
8H
20O
4Si, 8%Sb (CH
3COO)
3
The Al (OH) that will contain additive
3The solid process waits the static pressure granulation, and process is carried out shaping to rolling technology again, and sieves in advance and classification;
To carry out the Al (OH) of pre-screening and classification shaping
3Solid is 1250 ℃ of down calcinings, further sieves, classification again, makes varigrained novel corundum abrasive.
Embodiment 4
Adopt 99.3% Al
2(SO
4)
318H
2O and 0.7% additive are raw material, and ammoniacal liquor is that precipitation agent prepares novel corundum abrasive.
At first with Al
2(SO
4)
318H
2The water-soluble after-filtration of O is removed impurity, is made into the Al that contains of 0.1 mol
3+The aqueous solution;
Dropping ammonia and stirring make and contain this Al in above-mentioned solution
3+The complete gelation of the aqueous solution, again through filter, washing, drying process obtain Al (OH)
3Solid;
Additive is joined Al (OH)
3Mixing in the solid; The feed composition of described 0.7% additive and weight percent content thereof are 6.7%Ca (NO
3)
2, 2.6%Fe (NO
3)
3, 1.7% (CH
3CH
2O)
4Ti, 18.1%Mg (NO
3)
2, 69.7%C
8H
20O
4Si, 1.2%Sb (CH
3COO)
3The Al (OH) that will contain additive
3The solid process waits the static pressure granulation, carries out shaping through ball-milling technology again, and sieves in advance and classification;
To carry out the Al (OH) of pre-screening and classification shaping
3Solid is 1300 ℃ of down calcinings, further sieves, classification again, makes varigrained novel corundum abrasive.
The present invention is not limited to above-mentioned implementation process, and the variation of a lot of details is possible, but therefore this do not run counter to scope and spirit of the present invention.
Claims (4)
1. novel corundum abrasive, its feed composition and weight percent content thereof are Al
2(SO
4)
318H
2O or AlNO
39H
2O 99.15%～99.85%, additive 0.15%～0.85%; Described additive is Ca (NO
3)
2, Fe (NO
3)
3, (CH
3CH
2O)
4Ti, Mg (NO
3)
2, C
8H
20O
4Si, Sb (CH
3COO)
3, its weight percent content that respectively accounts for additive is 0%～25%Ca (NO
3)
2, 0%～15Fe (NO
3)
3, 0%～10% (CH
3CH
2O)
4Ti, 0%～30%Mg (NO
3)
2, 40%～90%C
8H
20O
4Si, 0～8%Sb (CH
3COO)
3
2. the preparation method of the novel corundum abrasive of claim 1 is to adopt wet chemical method and high-temperature calcination, has following steps:
(1) adopts Al
2(SO
4)
318H
2O or AlNO
39H
2O is a raw material, and water-soluble after-filtration is removed impurity, is made into the Al that contains of 0.1 mol～0.2 mol
3+The aqueous solution;
(2) in the aqueous solution of step (1), add ammoniacal liquor and stir and make its complete gelation or precipitation, again through filter, washing, drying process obtain Al (OH)
3Solid;
(3) additive with respective amount joins Al (OH)
3Mixing in the solid; The Al (OH) that will contain additive
3Solid is through waiting static pressure granulation, again through ball milling, shake mill, to roll, extrusion process carries out shaping, and sieve in advance and classification;
(4) step (3) is sieved in advance with the fractionated abrasive material 1250 ℃～1400 ℃ calcinings, further sieve again, classification, make varigrained novel corundum abrasive.
3. according to the preparation method of the novel corundum abrasive of claim 2, it is characterized in that the Al (OH) of described step (3)
3Solid particulate is shaped as equivalance type, sheet, splinter shape or long column shape, final abrasive grain controllable shapes.
4. according to the preparation method of the novel corundum abrasive of claim 2, it is characterized in that the micro-grain-size of the corundum abrasive granule interior of described step (4) is between 50nm～3 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101542933A CN101434829A (en) | 2008-12-19 | 2008-12-19 | Novel corundum abrasive and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101542933A CN101434829A (en) | 2008-12-19 | 2008-12-19 | Novel corundum abrasive and preparation thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101434829A true CN101434829A (en) | 2009-05-20 |
Family
ID=40709469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101542933A Pending CN101434829A (en) | 2008-12-19 | 2008-12-19 | Novel corundum abrasive and preparation thereof |
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|---|---|
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492394A (en) * | 2011-11-18 | 2012-06-13 | 天津大学 | Preparation method of hexagonal tabular nano-crystal corundum abrasive |
| CN102732214A (en) * | 2012-06-20 | 2012-10-17 | 天津大学 | Ceramic corundum abrasive containing multiphase additive |
| CN102775135A (en) * | 2012-07-11 | 2012-11-14 | 天津大学 | Novel ceramic corundum abrasive |
| CN103242033A (en) * | 2013-04-27 | 2013-08-14 | 天津大学 | Ceramic corundum grinding material and preparation method thereof |
| CN103496727A (en) * | 2012-08-10 | 2014-01-08 | 山东大学 | Preparation method for microcrystal alpha-Al2O3 aggregation |
| CN106083001A (en) * | 2016-06-17 | 2016-11-09 | 天津大学 | Nanocrystalline blue ceramic corundum abrasive and preparation method thereof |
| CN107674646A (en) * | 2017-09-12 | 2018-02-09 | 天津大学 | Controllable nanocrystalline ceramics corundum abrasive of a kind of macro morphology and preparation method thereof |
| CN109956741A (en) * | 2019-03-11 | 2019-07-02 | 山东天汇研磨耐磨技术开发有限公司 | A kind of micro-crystalline ceramic corundum abrasive and its manufacturing method |
-
2008
- 2008-12-19 CN CNA2008101542933A patent/CN101434829A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102492394A (en) * | 2011-11-18 | 2012-06-13 | 天津大学 | Preparation method of hexagonal tabular nano-crystal corundum abrasive |
| CN102732214A (en) * | 2012-06-20 | 2012-10-17 | 天津大学 | Ceramic corundum abrasive containing multiphase additive |
| CN102732214B (en) * | 2012-06-20 | 2014-04-02 | 天津大学 | Ceramic corundum abrasive containing multiphase additive |
| CN102775135A (en) * | 2012-07-11 | 2012-11-14 | 天津大学 | Novel ceramic corundum abrasive |
| CN103496727A (en) * | 2012-08-10 | 2014-01-08 | 山东大学 | Preparation method for microcrystal alpha-Al2O3 aggregation |
| CN103496727B (en) * | 2012-08-10 | 2015-03-04 | 山东大学 | Preparation method for microcrystal alpha-Al2O3 aggregation |
| CN103242033A (en) * | 2013-04-27 | 2013-08-14 | 天津大学 | Ceramic corundum grinding material and preparation method thereof |
| CN106083001A (en) * | 2016-06-17 | 2016-11-09 | 天津大学 | Nanocrystalline blue ceramic corundum abrasive and preparation method thereof |
| CN106083001B (en) * | 2016-06-17 | 2019-07-23 | 天津大学 | Nanocrystalline blue ceramic corundum abrasive and preparation method thereof |
| CN107674646A (en) * | 2017-09-12 | 2018-02-09 | 天津大学 | Controllable nanocrystalline ceramics corundum abrasive of a kind of macro morphology and preparation method thereof |
| CN109956741A (en) * | 2019-03-11 | 2019-07-02 | 山东天汇研磨耐磨技术开发有限公司 | A kind of micro-crystalline ceramic corundum abrasive and its manufacturing method |
| CN109956741B (en) * | 2019-03-11 | 2021-06-08 | 山东天汇研磨耐磨技术开发有限公司 | Microcrystalline ceramic corundum abrasive and manufacturing method thereof |
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Open date: 20090520 |