CN1108155A - Method for prepn. of micro- or supermicro- powder - Google Patents
Method for prepn. of micro- or supermicro- powder Download PDFInfo
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- CN1108155A CN1108155A CN 94102405 CN94102405A CN1108155A CN 1108155 A CN1108155 A CN 1108155A CN 94102405 CN94102405 CN 94102405 CN 94102405 A CN94102405 A CN 94102405A CN 1108155 A CN1108155 A CN 1108155A
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- explosive
- crushed material
- micro mist
- bullet
- detonation
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Abstract
The primary crushed substance mixed with explosive with blend ration of (30-60) to (70-40) are charged into bomb by uniformly mixing or split charging, then detonated in the exploding chamber. The shock ware produced when explosive detonating act on the substance to be crushed and make it smash up. The smashed substance is collected to obtain the purified micro fine powder or super micro fine powder through epuration and classifying. Said invention features simple, convenient and capable of preparing the micro fine powder of specially hard stock which is unable or difficult to prepare by the traditional methods.
Description
The present invention relates to a kind of preparation method of powder, especially a kind of under the explosive effect, the material micro mist that chemical property is stable and thing is mutually stable, the preparation method of super fine.
Dusty material occupies critical role at material science, for example makes high frequency width piezoelectric ceramics and need use Pb
2O
4, La
20
3, MnO
2, TiO
2Deng micro mist, make the iron oxysome and need use Fe
2O
3, NiO, ZnO, Co
2O
3Deng micro mist, also needing average grain diameter in many aspects is 10
-6The super fine of M magnitude.The traditional preparation process method of micro mist, super fine has mechanical milling method and chemical preparation method, adopt mechanical milling method to need equipment such as a series of supporting pulverizers, ball mill, for improving high efficiency, sometimes need to control the glass point temperature by crushed material, it is micro mist and super fine that some special hard material is difficult to pulverize with mechanical means; Adopt chemical preparation method, for example the metal dust continuous burning prepares the metal oxide micro mist, and the strict process condition need be arranged, and product is of equal value high, and the micro mist of some material can't make with chemical method.
The pulverizing of solid material, from the body stress theory analysis as long as external force just can achieve the goal during greater than himself tension, compression strength; Explosive detonation moment produce up to 10
4-10
5The existing compression of powerful destructive power that atmospheric detonation wave of magnitude and shock wave produce surrounding medium, there be drawing of sparse reaction ripple to stretch stress again, comminuted solids material very effectively, when the objective of the invention is to utilize explosive detonation surrounding medium is produced the characteristic of powerful destructive power, find out explosive with by the assembly method of crushed material, with the detonation energy that effectively utilizes explosive pulverizing by crushed material, thereby the preparation method of a kind of micro mist, super fine is provided.
Purpose of the present invention can realize by following measure:
The ratio by crushed material and explosive 30~60/70~30 after preliminary grinding is evenly loaded in mixture, and the pulverizing bullet of making is ignited in explosion chamber, produce during explosive detonation 10
4-10
5Atmospheric detonation wave of magnitude and shock wave act on the pulverizing of crushed material, collect crushed material and get purifying micro mist or super fine product through purification, classification.
The present invention can also with after preliminary grinding by the independent packing of crushed material, to be that 30~60/70~40 ratio is filled explosive by crushed material/explosive around aliquot, make the pulverizing bullet; Produce when utilizing explosive detonation 10
4-10
5The atmospheric shock wave of magnitude is pulverized by crushed material, and the crushed material of collection gets purifying micro mist or super fine product through purification, classification.
Purify for ease of crushed material, the used explosive of the present invention comprises that product should be gas when initiator charge and pulverizing played packaging material, aliquot packaging material, the detonation of initiator material, or the solid product that detonation produces can become the gaseous products effusion under the logical oxygen condition of heating.
The alternative explosive example of the present invention has: ladder is because of ladder, hexogen (RDX), Tai Anaosuojin, ammonpulver, 2# rock explosive etc.; Can provide pulverizing bullet packaging material, aliquot packaging material, the initiator material example of selection that vinyon, igelite, papery product etc. are arranged.
For strengthening the detonation crushing effect, according to mechanism of detonation, will being divided separately in the straight tube of vertically arranging of packing into after preliminary grinding by crushed material, straight tube can be made by vinyon, papery product, and filling explosive makes the pulverizing bullet on every side at straight tube; Detonation is delivered to the process of the other end from pulverizing bullet one end, the pressure wave stepless action of generation in straight tube by crushed material, to improve the uniformity of crushing effect and crushed material particle diameter.
For the product that improves super stupefied micro mist becomes rate, making can be with the industrial goods that are chosen to be by crushed material below 40 orders when pulverizing bullet.
The present invention has the following advantages:
1, compare with the traditional preparation process method of micro mist, super fine, need not use complete set of equipments, technical process is simple, and it is simple in structure, easily manufactured to pulverize bullet.
2, utilize explosive detonation to pulverize by crushed material and prepare micro mist, super fine, the efficient height, and can prepare conventional method, the micro mist of the special hard material that can not or be difficult to prepare, super fine.
The present invention pulverizes the interior explosive payload of bullet when detonation when implementing, should reach the purpose of pulverizing, again explosion chamber is not produced destruction.
The embodiment of the invention is as follows:
Embodiment one:
1-1 is the quartz sand of φ 0.5-0.8 millimeter by crushed material for average grain diameter after preliminary grinding.
The 1-2 explosive is the 2# rock explosive.
1-3 with by crushed material/explosive be 30/70 ratio will by crushed material with make the pulverizing bullet in explosive evenly mixes the papery packing tube of packing into.
It is trigger that 1-4 adopts 8# paper detonator, ignites in explosion chamber and pulverizes bullet.
1-5 collects crushed material under 700 ℃ of blowing air conditions, through purifying more than 4 hours.
The classified processing of 1-6 purified product gets average grain diameter 10
-6The micro mist (productive rate is about 80%) of rice magnitude.
Embodiment two:
2-1 is the following Fe of 40 orders more than 50 orders by crushed material
2O
3Industrial goods.
The 2-2 explosive is an industrial goods RDX explosive.
2-3 is packed into by crushed material in the vinyl tube, and hard then straight cutting is gone into the polyethylene packaging tube, being that 50/50 ratio is filled explosive by crushed material/explosive around vinyl tube.
It is dinitrodiazophenol that 2-4 adopts elementary powder charge, and secondary powder charge is RDX, and shell draws remarkable pulverizing bullet for poly-second plastics detonator is an initiator in explosion chamber.
2-5 collects crushed material at 400-450 ℃, under the blowing air condition, through purifying more than 8 hours.
The classified processing of 2-6 purified product, getting average grain diameter is 10
-6The super fine of M magnitude (productive rate is about 80%).
Embodiment three:
3-1 is the following α type of 40 orders Al more than 80 orders by crushed material
2O
3Industrial goods.
The 3-2 explosive is a rope explosive difficult to understand.
3-3 pulverizes and plays the same 2-3 of structure, and the powder charge ratio: by crushed material/explosive is 60/40.
It is dinitrodiazophenol that 3-4 adopts elementary powder charge, and secondary powder charge is RDX, and shell is that the detonator of vinyon is an initiator, ignites in explosion chamber and pulverizes bullet.
3-5 collects and minces at 800 ℃, under the blowing air condition, through purifying below 8 hours.
The classification of 3-6 purified product is handled, and getting average grain diameter is 10
-6The super fine of M magnitude (productive rate is about 70-80%).
Embodiment four:
4-1 is the following SiO of 40 orders more than 50 orders by crushed material
2Industrial goods.
The 4-2 explosive is an industrial goods RDX explosive.
4-3 pulverizes and plays the same 2-3 of structure, and the powder charge ratio: by crushed material/explosive is 35/65.
The 4-4 initiator is ignited in explosion chamber with 2-4 and is pulverized bullet.
4-5 collects crushed material at 700 ℃, under the blowing air condition, through purifying more than 8 hours.
The classification of 4-6 purified product is handled, and getting average grain diameter is 10
-6The super fine of M magnitude (productive rate is about 70-90%).
Claims (5)
1, the preparation method of a kind of micro mist, super fine is that evenly being loaded in mixture with 30~60/70~40 ratio by crushed material and explosive after preliminary grinding made the pulverizing bullet; Ignite in explosion chamber and pulverize bullet, detonation wave that produces during explosive detonation and shock wave act on by crushed material and make it to pulverize; Collect crushed material and get purifying micro mist or super fine product through purification, classification.
2, the preparation method of a kind of micro mist, super fine, be with after preliminary grinding by the crushed material packing; To be to fill explosive around 30~60/70~40 ratio is divided in thing by crushed material/explosive, make the pulverizing bullet; Ignite in explosion chamber and pulverize bullet, the shock wave that produces during explosive detonation acts on by the pulverizing of crushed material; Collect crushed material and get purifying micro mist or super fine product through purification, classification.
3, a kind of micro mist according to claim 2, super micropowder preparing process, its special sheet are that described pulverizing bullet is with in the straight tube of vertically arranging of being packed into by the crushed material branch behind vent in the sides of a garment mill, at straight tube] fill explosive on every side and make.
4,, it is characterized in that used explosive comprises the initiator explosive and pulverizes that to play packaging material, aliquot packaging material, initiator material detonation product be that the solid product that gas or detonation produce can become gaseous products under the logical oxygen condition of heating according to claim 1,2 or the preparation method of described a kind of micro mist, super fine.
5, the preparation method of a kind of micro mist according to claim 4, super fine is characterized in that described pulverizing bullet is by being assembled by crushed material and explosive below 40 orders.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 94102405 CN1108155A (en) | 1994-03-05 | 1994-03-05 | Method for prepn. of micro- or supermicro- powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 94102405 CN1108155A (en) | 1994-03-05 | 1994-03-05 | Method for prepn. of micro- or supermicro- powder |
Publications (1)
Publication Number | Publication Date |
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CN1108155A true CN1108155A (en) | 1995-09-13 |
Family
ID=5030630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 94102405 Pending CN1108155A (en) | 1994-03-05 | 1994-03-05 | Method for prepn. of micro- or supermicro- powder |
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CN (1) | CN1108155A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115155761A (en) * | 2022-07-13 | 2022-10-11 | 佛山市兆冠科技咨询服务有限公司 | Preparation process, preparation device and application of large-specific-surface-area ultrafine powder |
-
1994
- 1994-03-05 CN CN 94102405 patent/CN1108155A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115155761A (en) * | 2022-07-13 | 2022-10-11 | 佛山市兆冠科技咨询服务有限公司 | Preparation process, preparation device and application of large-specific-surface-area ultrafine powder |
CN115155761B (en) * | 2022-07-13 | 2024-04-23 | 佛山市兆冠科技咨询服务有限公司 | Preparation process, preparation device and application of ultrafine powder with large specific surface area |
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