CN103990418B - The explosive method of powder unloading temperature can be reduced - Google Patents
The explosive method of powder unloading temperature can be reduced Download PDFInfo
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- CN103990418B CN103990418B CN201410176274.6A CN201410176274A CN103990418B CN 103990418 B CN103990418 B CN 103990418B CN 201410176274 A CN201410176274 A CN 201410176274A CN 103990418 B CN103990418 B CN 103990418B
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Abstract
The present invention discloses a kind of simple to operate, with low cost, explosive method that can reduce powder unloading temperature, it is characterized in that following steps: powder is placed in mould and makes powder pressing body; Mould built with powder pressing body is placed in the below of the film flying of destructor, above mould, has metal cover board, below powder pressing body, be connected to metal level, below metal level, be connected to nonmetal gripper shoe; The cell body of built-in water is provided with immediately below powder pressing body, the cross section of powder pressing body is less than the notch of cell body, the horizontal plane spacing of nonmetal gripper shoe and water is 2 ~ 100mm, and the mass ratio of described water and powder pressing body is at least 2:1 and water depth is at least 100mm; Ignite the explosive column in destructor; Recovery powder ash, to the post processing of powder ash.
Description
Technical field
The present invention relates to a kind of explosive compaction method, especially a kind of simple to operate, with low cost, explosive method that can reduce powder unloading temperature.
Background technology
Explosive compaction or shock compaction promote film flying with explosion energy to hit powder at a high speed, produce shock wave in the powder, shock wave, by producing high temperature, high pressure during powder, makes powder produce phase transformation, or shock wave is by powder pressing, it is made to react and produce new material.As nano-polycrystalline diamond, cubic boron nitride is exactly the product of impact phase transition synthesis, and boron carbide, cerium oxide are then that compacted powder reacts and the novel substance that produces.
The shock wave pressure produced that explodes disappears, and is referred to as discharge degree; Powder temperature corresponding during discharge degree is referred to as unloading temperature.In the phase transformation theory of blast polycrystalline diamond, high temperature, high pressure are that graphite-phase becomes adamantine necessary condition, and when unloading temperature is too high, the diamond that part generates will inversion be graphite, directly affects adamantine conversion ratio.
Explosive compaction method is in the past in mould, load onto powder (mixed powder etc. as graphite powder, graphite and metal mixed powder, graphite and metal, resin), through forcing press precompressed, is depressed into and has the periporate opisthosoma that voidage is 10 ~ 25%; Afterwards, the mould built with body of powder is placed on metallic plate (momentum derivation plate) and goes up and be placed in below the film flying of destructor, the film flying of mould and destructor maintains a certain distance (frame is high); Light the detonator of destructor, explosive column in destructor is exploded, promote film flying and clash into powder pressing body with certain flying speed ... finally, reclaim the powder ash be scattered, and powder ash is screened, rinse and carry out the non-phase transformation powder-processed of remnants with chemicals, namely obtain required product.
Owing to there being the space of 10 ~ 25% in powder, in addition the density of metallic plate is 100% crystal density, after the shock wave that blast produces enters powder, gas molecule in powder voids is all driven into Mach stem, air finally in all spaces is all intercepted by metallic plate (momentum derivation plate) and is trapped on the inner surface of metallic plate, form a gas thin layer, gas thin layer will produce adiabatic compression under the effect of shock wave, thus seriously adds the additional temp of powder.The excessively additional temperature rise superposition of powder is on the impact temperature calculated with Debye theory, the actual temperature rise of powder is made to reach a high level, thus unloading temperature when improving discharge degree significantly, as reached more than 900 DEG C, finally increase the inversion of the products such as such as diamond, reduce the conversion ratio of product.
China Patent No. is 200710012257.9 is patent of invention, and disclose one " the explosive compaction method of capable eliminating additional temperature impact ", concrete grammar powder is placed in mould to make powder pressing body; Mould built with powder pressing body is placed in the below of the film flying of destructor, below powder pressing body, is connected to metal level, below metal level, have nonmetal gripper shoe; Ignite the explosive column in destructor; Recovery powder ash, to the post processing of powder ash.Metal level can be copper or iron or cobalt etc., and nonmetal gripper shoe is plastic plate or plank or cardboard etc.Set metal level can be derived plate with momentum in the past and equally be made reflection hit intensity of wave to be equal to or slightly greater than into shooting ripple, also can the gas thin layer produced because of powder voids be dissipated in metal level simultaneously, do not produce serious gas adiabatic compression, thus do not produce additional temp.
Although above-mentioned patented method eliminates the direct impact of additional temp on powder phase transformation conversion ratio, and unloading temperature can be made relatively to reduce, but unloading temperature still can reach 800 ~ 900 DEG C, or the phase transformation of diamond generating portion can be made, its diamond conversion ratio can only reach 36%, fundamentally eliminate the adverse effect that produces of unloading temperature, this problem becomes people and thirsts for solving always but fail the technical barrier that succeeds all the time.
Summary of the invention
The present invention is the above-mentioned technical problem in order to solve existing for prior art, provides a kind of simple to operate, with low cost, explosive method that can reduce powder unloading temperature.
Technical solution of the present invention is: a kind of explosive method reducing powder unloading temperature, is characterized in that following steps:
A. powder is placed in mould and makes powder pressing body;
B. the mould built with powder pressing body is placed in the below of the film flying of destructor, above mould, has metal cover board, below powder pressing body, be connected to metal level, below metal level, be connected to nonmetal gripper shoe;
C. immediately below powder pressing body, be provided with the cell body of built-in water, the cross section of powder pressing body is less than the notch of cell body, the horizontal plane spacing of nonmetal gripper shoe and water is 2 ~ 100mm, and the mass ratio of described water and powder pressing body is at least 2:1 and water depth is at least 100mm;
D. the explosive column in destructor is ignited;
E. powder ash is reclaimed, to the post processing of powder ash.
The present invention can make powder enter in water when shock wave pressure just unloads (pressure is zero), under the prerequisite not affecting the product production rates such as diamond, effectively reduce unloading temperature, avoid the products such as diamond because of too high the occurred inversion problem of unloading temperature, improve adamantine conversion ratio and there is the advantages such as simple to operate, with low cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention.
Detailed description of the invention
Embodiment 1:
As shown in Figure 1, carry out in accordance with the following steps:
A. as the prior art, the powder such as the mixed powder of graphite powder, graphite and metal mixed powder, graphite and metal, resin are placed in below have the mould 1 of cover plate 4 to make powder pressing body 2;
B. as the prior art, one deck copper powder or the metal level such as iron powder or cobalt powder 5 is filled above powder pressing body 2 in mould 1, the density of metal level 5 is 40 ~ 65% of this metallic crystal density, the height of metal level 5 can set as required, preferably layer thickness 1/20 ~ 1/4, plastic plate or the nonmetal gripper shoe 6 such as plank or cardboard is had on metal level 5, afterwards, mould is upside down in the below of destructor film flying 3 together with cover plate 4, namely mould 1 has metal cover board 4 above, metal level 5 is connected to below powder pressing body 2, metal level 5 is connected to nonmetal gripper shoe 6 below,
C. mould 1 is placed in the top of cell body 8 below, and the level cross-sectionn of powder pressing body 2 is less than cell body 8
Notch, the powder ash that powder pressing body 2 is formed because film flying clashes into enters in cell body 8, be equipped with water 7 at cell body 8, nonmetal gripper shoe 6 is 2mm with the horizontal plane spacing of water 7, and described water 7 and the mass ratio of powder pressing body 2 are at least 2:1 and water 7 degree of depth is at least 100mm;
D. the explosive column in destructor is ignited;
E. powder ash is reclaimed, to the post processing of powder ash.
Take gained diamond, calculating adamantine conversion ratio is 37%.
Embodiment 2:
Embodiment 2 is substantially the same manner as Example 1, and difference is non-metal profile 6 is 45mm with the horizontal plane spacing of water 7.
Take gained diamond, calculating adamantine conversion ratio is 44%.
Embodiment 3:
Embodiment 3 is substantially the same manner as Example 1, and difference is non-metal profile 6 is 100mm with the horizontal plane spacing of water 7.
Take gained diamond, calculating adamantine conversion ratio is 38%.
Claims (1)
1. can reduce an explosive method for powder unloading temperature, it is characterized in that following steps:
A. the mixed powder of graphite powder, graphite and metal mixed powder or graphite and metal, resin is placed in mould (1) and makes powder pressing body (2);
B. the mould (1) built with powder pressing body (2) is placed in the below of the film flying (3) of destructor, mould (1) has metal cover board (4) above, below powder pressing body (2), be connected to metal level (5), metal level (5) is connected to nonmetal gripper shoe (6) below;
C. immediately below powder pressing body (2), the cell body (8) of built-in water (7) is provided with, powder pressing body
(2) cross section is less than the notch of cell body (8), and nonmetal gripper shoe (6) is 2 ~ 100mm with the horizontal plane spacing of water (7), and described water (7) and the mass ratio of powder pressing body (2) are at least 2:1 and water (7) degree of depth is at least 100mm;
D. the explosive column in destructor is ignited;
E. powder ash is reclaimed, to the post processing of powder ash.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410176274.6A CN103990418B (en) | 2014-04-29 | 2014-04-29 | The explosive method of powder unloading temperature can be reduced |
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| CN201410176274.6A CN103990418B (en) | 2014-04-29 | 2014-04-29 | The explosive method of powder unloading temperature can be reduced |
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| CN103990418A CN103990418A (en) | 2014-08-20 |
| CN103990418B true CN103990418B (en) | 2016-03-09 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065811A (en) * | 1991-04-19 | 1992-11-04 | 中国矿业大学 | Method and apparatus for explosive manufacture of diamond |
| RU2051093C1 (en) * | 1992-07-14 | 1995-12-27 | Александр Михайлович Каунов | Method of diamond producing from diamond-like substances |
| CN2331413Y (en) * | 1998-06-03 | 1999-08-04 | 浣石 | Device for synthesising diamond micropowder by explosion method |
| CN101147851A (en) * | 2007-07-25 | 2008-03-26 | 张凯 | Explosive compacting method capable eliminating additional temperature affection |
| JP2010254529A (en) * | 2009-04-27 | 2010-11-11 | Nof Corp | Method for producing diamond and shock compression apparatus |
| CN102600769A (en) * | 2012-04-06 | 2012-07-25 | 北京理工大学 | High-quenching-rate material impact synthesis and recovery device |
| CN202447043U (en) * | 2011-12-20 | 2012-09-26 | 河南省豫星华晶微钻有限公司 | Device for detonating trans-crystallization nanometer diamond |
| CN202700466U (en) * | 2012-07-19 | 2013-01-30 | 张路青 | Explosion tank with vertical openings and with tank body and bottom to be separable |
-
2014
- 2014-04-29 CN CN201410176274.6A patent/CN103990418B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065811A (en) * | 1991-04-19 | 1992-11-04 | 中国矿业大学 | Method and apparatus for explosive manufacture of diamond |
| RU2051093C1 (en) * | 1992-07-14 | 1995-12-27 | Александр Михайлович Каунов | Method of diamond producing from diamond-like substances |
| CN2331413Y (en) * | 1998-06-03 | 1999-08-04 | 浣石 | Device for synthesising diamond micropowder by explosion method |
| CN101147851A (en) * | 2007-07-25 | 2008-03-26 | 张凯 | Explosive compacting method capable eliminating additional temperature affection |
| JP2010254529A (en) * | 2009-04-27 | 2010-11-11 | Nof Corp | Method for producing diamond and shock compression apparatus |
| CN202447043U (en) * | 2011-12-20 | 2012-09-26 | 河南省豫星华晶微钻有限公司 | Device for detonating trans-crystallization nanometer diamond |
| CN102600769A (en) * | 2012-04-06 | 2012-07-25 | 北京理工大学 | High-quenching-rate material impact synthesis and recovery device |
| CN202700466U (en) * | 2012-07-19 | 2013-01-30 | 张路青 | Explosion tank with vertical openings and with tank body and bottom to be separable |
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| CN103990418A (en) | 2014-08-20 |
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Effective date of registration: 20220609 Address after: 116000 19-11, No. 1, Chongshan street, Xigang District, Dalian City, Liaoning Province Patentee after: Zhang Luqing Address before: Room 302, block a, No. 1, Huoju Road, hi tech park, Dalian, Liaoning 116000 Patentee before: DALIAN KAIFENG SUPERHARD MATERIAL Co.,Ltd. |
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Effective date of registration: 20220628 Address after: 116000 Industrial Park, shagangzi village, Yingchengzi street, Ganjingzi District, Dalian City, Liaoning Province Patentee after: Dalian Xinkai polycrystalline diamond Technology Co.,Ltd. Address before: 116000 19-11, No. 1, Chongshan street, Xigang District, Dalian City, Liaoning Province Patentee before: Zhang Luqing |
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