CN103408388A - Powdery emulsion ammonium nitrate explosive - Google Patents
Powdery emulsion ammonium nitrate explosive Download PDFInfo
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- CN103408388A CN103408388A CN2013103751065A CN201310375106A CN103408388A CN 103408388 A CN103408388 A CN 103408388A CN 2013103751065 A CN2013103751065 A CN 2013103751065A CN 201310375106 A CN201310375106 A CN 201310375106A CN 103408388 A CN103408388 A CN 103408388A
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Abstract
The invention discloses a powdery emulsion ammonium nitrate explosive. The powdery emulsion ammonium nitrate explosive is a mixture of the following components in percentage by weight: 89-95% of ammonium nitrate, 0-5.5% of sodium nitrate, 3-5% of oil phase material, 1.5-2.5% of alkylimidazoline emulsifying agent, and 0.1-0.3% of water, wherein an oxidant is composed of ammonium nitrate or the mixture of ammonium nitrate and sodium nitrate; a combustible agent is composed of the oil phase material and the alkylimidazoline emulsifying agent; and the process steps of emulsifying, liquid-phase mixing, and spray drying are carried out on the raw materials to form a uniform crystal/oil explosive mixture. The explosive disclosed by the invention is simple in prescription; the alkylimidazoline emulsifying agent is adopted to facilitate the flowing and the conveying of the materials; the subsequent process steps of the spray-powder formation and air flow drying are conveniently implemented; the explosive has excellent explosion performance and is stable to store and water-proof to some extent; a venturi tube is applied to mist spray to form powder, the material flow is pumped out by means of negative pressure under the action of the vacuum attraction generated by the compressed air in the venturi tube, and a liquid pump or a screw pump does not need to be additionally arranged; the production process is small in energy consumption; and the production technology is essentially high in safety, large in yield and low in cost.
Description
Technical field
The present invention relates to a kind of powder emulsified ammoniumnitrate explosives, belong to the preparing technical field of industrial explosive.
Background technology
Powdery emulsifying explosive is that oxygenant and combustible agent are carried out to the emulsification mixing under liquid state, and the contact area of its oxygenant and combustible agent is near emulsion explosive.Therefore, powdery emulsifying explosive shows higher blast performance (as explosion velocity 3500 ms
-1～4500ms
-1, induced detonation 8 cm～20cm, quick-fried power 300ml～350ml).The foreign patent document discloses powdery emulsifying explosive earlier, relatively typical as: EP0238210, US4525225, US4548659, US4685124 etc., its technical characteristics is that oxygenant and combustible agent are prepared into to water, oily two phase liquid, under agitation Jiang Shui, oily two phase liquid emulsion dispersion become uniform mixture, then in mixture, add nucleator or use dystectic oil phase material to make at normal temperatures mixture solidified, pulverizing, making the insensitive explosive composition of detonator sensitivity or detonator.But as can be known from foreign information, foreign patent may be limited to the security of actual process operation, rests on laboratory stage always, does not drop into industrial production.Afterwards, Chinese patent CN1061213A has proposed a kind of powdery emulsifying explosive and manufacture method thereof, at first the method adopts emulsifying manner that oxygenant water-phase material and combustible agent oil phase material are made to latex, then adopts the method for air flow type jet nozzle powder by atomization that latex is made to the powder type explosive mixture.This explosive has blast performance preferably, and has formed suitability for industrialized production, at home the larger proportion of industrial explosive market share.
But from powdery emulsifying explosive actual industrial production situation, also there is certain defect in this product.For example, high molecular polymer emulsifying agent and the emulsifying process of this formula for a product use adopt higher shearing resistance (emulsification mixing equipment rotating speed 2500rmin
-1～2900rmin
-1), make very thickness of emulsifying base, cause and be atomized into the too much energy of powder process consumption; In addition, the high pressure draft equipment dynamic consumption that the drying process with atomizing of powdery emulsifying explosive adopts is large, and intrinsic safety is poor.Although having proposed innovative approach to CN1061213A, (mainly formula is simplified Chinese patent CN101045662A, in order to improve blast performance, in mixture after spraying into powder, added high-energy solid), but the technology pattern of the original high-shear emulsifying-high-pressure fog of this technology-tower powder process does not change.
In actual production, need a kind of fill a prescription simple, blast performance is good, the product shelf-stable, have certain water repelling property, the production technique intrinsic safety is high, production capacity is large, energy consumption is little and with low cost powdery emulsifying explosive.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, provide a kind of fill a prescription simple, blast performance is good, the product shelf-stable, have certain water repelling property, the production technique intrinsic safety is high, production capacity is large, energy consumption is little and with low cost powder emulsified ammoniumnitrate explosives.
For achieving the above object, the technology used in the present invention means are: a kind of powder emulsified ammoniumnitrate explosives comprises the following composition mixed with mass percent: ammonium nitrate 89～95, SODIUMNITRATE 0～5.5, oil phase material 3～5, alkyl imidazoline emulsifying salt agent 1.5～2.5, water 0.1～0.3; Wherein, the compositions of mixtures oxygenant of ammonium nitrate or ammonium nitrate and SODIUMNITRATE, oil phase material and the agent of alkyl imidazoline emulsifying salt form combustible agent, and by emulsification, liquid-phase mixing, spraying drying form a kind of uniform oily peritectic explosive composition.
Further, described oil phase material adopts saturated branched alkane derivative.
Further, described saturated branched alkane derivative refers to one or more mixing of SEMI-REFINED PARAFFIN WAX, ceresine, compound wax, machine oil.
Further, described alkyl imidazoline salt emulsifying agent refers to: dodecenylsuccinic acid 17 alkenyl imidazoline salt T-703 or alkylphosphonic acid carboxylic acid imidazoline salt T-708.
Further, described by emulsification, liquid-phase mixing, spraying drying form a kind of uniform oily peritectic explosive composition, and concrete operation step is as follows:
The first step: add vessel in heating to dissolve in ammonium nitrate, SODIUMNITRATE and water, when temperature is heated to 135 ℃, dissolve complete, 135 ℃～138 ℃ lower heat preservation for standby use;
Second step: oil phase material and alkyl imidazoline salt emulsifying agent are joined to container together, be heated to 100 ℃ and melt fully to it, form uniform oil phase, 100 ℃～120 ℃ lower heat preservation for standby use;
The 3rd step: the container that will contain oil phase fixes, and loads onto stirring rake, at rotating speed 850rmin
-1～1100rmin
-1Under whipped state, the water material is joined in oil phase material, after feeding in raw material, continue to stir 1min, obtain the finely dispersed pasty mixture of two-phase;
The 4th step: pasty mixture prepared by the 3rd step joins in the insulation hold tank of spraying plant, when compressor reaches pressure 0.2MPa～0.3MPa, open compressed-air actuated stopping valve and hold tank baiting valve, make pasty mixture spray into loading head by Venturi tube, feed rate is 10kgmin
-1～15kgmin
-1
The 5th step: the pulverulent mixture that will collect from loading head is loft drier, and 60 ℃～70 ℃ dry 1h, then dress up powder stick with the filling powdery explosives machine, powder-charge temperature<40 ℃.
Further, in step 3, liquid-phase mixing is discontinuous, semi continuous or continous way production.
Further, the spraying plant in step 4 comprises air compressor, gas connection pipe, Venturi tube and the loading head connected successively, and is arranged on the stopping valve on gas connection pipe and is arranged on the hold tank on Venturi tube.
Compared with prior art, beneficial effect of the present invention embodies in the following areas: formula is simple, adopt the agent of alkyl imidazoline emulsifying salt, do not need very high shearing resistance, just can make oxygenant and combustible agent reach a kind of oil-in-water-type or weak Water in Oil emulsion dispersion system, because its viscosity is little, be convenient to flowing and carrying of material, moisture is easy to remove, facilitate follow-up spraying to become the smooth enforcement of powder, air stream drying, blast performance is good, the product shelf-stable, have certain water repelling property; Adopt Venturi tube to spray into powder, compressed air stream produces in Venturi tube vacuum gravitation makes streams be drawn out of by negative pressure, mixture does not need to increase the handling equipment of liquid pump or spiral pump and so on, and the energy consumption in production process is little, and the production technique intrinsic safety is high, production capacity is large, with low cost.
The accompanying drawing explanation
The present invention is further elaborated below in conjunction with drawings and Examples.
Fig. 1 is spraying plant structural representation of the present invention.
In figure: 1, air compressor, 2, gas connection pipe, 3, Venturi tube, 4, loading head, 5, stopping valve, 6, hold tank.
Embodiment
A kind of powder emulsified ammoniumnitrate explosives, comprise the following composition mixed with mass percent: ammonium nitrate 89～95, SODIUMNITRATE 0～5.5, oil phase material 3～5, alkyl imidazoline emulsifying salt agent 1.5～2.5, water 0.1～0.3; Wherein, the compositions of mixtures oxygenant of ammonium nitrate or ammonium nitrate and SODIUMNITRATE, oil phase material and the agent of alkyl imidazoline emulsifying salt form combustible agent, and by emulsification, liquid-phase mixing, spraying drying form a kind of uniform oily peritectic explosive composition.
Further, described oil phase material adopts saturated branched alkane derivative.
Further, described saturated branched alkane derivative refers to one or more mixing of SEMI-REFINED PARAFFIN WAX, ceresine, compound wax, machine oil.
Further, described alkyl imidazoline salt emulsifying agent refers to: dodecenylsuccinic acid 17 alkenyl imidazoline salt T-703 or alkylphosphonic acid carboxylic acid imidazoline salt T-708.
Further, described by emulsification, liquid-phase mixing, spraying drying form a kind of uniform oily peritectic explosive composition, and concrete operation step is as follows:
The first step: add vessel in heating to dissolve in ammonium nitrate, SODIUMNITRATE and water, when temperature is heated to 135 ℃, dissolve complete, 135 ℃～138 ℃ lower heat preservation for standby use;
Second step: oil phase material and alkyl imidazoline salt emulsifying agent are joined to container together, be heated to 100 ℃ and melt fully to it, form uniform oil phase, 100 ℃～120 ℃ lower heat preservation for standby use;
The 3rd step: the container that will contain oil phase fixes, and loads onto stirring rake, at rotating speed 850rmin
-1～1100rmin
-1Under whipped state, the water material is joined in oil phase material, after feeding in raw material, continue to stir 1min, obtain the finely dispersed pasty mixture of two-phase;
The 4th step: pasty mixture prepared by the 3rd step joins in the insulation hold tank of spraying plant, when compressor reaches pressure 0.2MPa～0.3MPa, open compressed-air actuated stopping valve and hold tank baiting valve, make pasty mixture spray into loading head by Venturi tube, feed rate is 10kgmin
-1～15kgmin
-1
The 5th step: the pulverulent mixture that will collect from loading head is loft drier, and 60 ℃～70 ℃ dry 1h, then dress up powder stick with the filling powdery explosives machine, powder-charge temperature<40 ℃.
Further, in step 3, liquid-phase mixing is discontinuous, semi continuous or continous way production.
As shown in Figure 1, the spraying plant in step 4 comprises air compressor 1, gas connection pipe 2, Venturi tube 3 and the loading head 4 connected successively, and is arranged on the stopping valve 5 on gas connection pipe 2 and is arranged on the hold tank 6 on Venturi tube 3.
Employing liquid-phase mixing technique prepares oxygenant and the combustible agent mixture can reach the high dispersing state, adopts Venturi tube spraying drying powder-forming Technology can reduce power consumption, improves the intrinsic safety of production process.
The emulsified powdered nitramon the present invention relates to refers to by emulsifying process oxygenant and combustible agent is formed to a kind of milk sap dispersion system (a kind of oil-in-water-type or weak water-in-oil-type), then by drying process with atomizing, make it slough moisture, and be dispersed into tiny micro powder granule, finally by powder charge, reach the explosive composition of certain density.This dispersion system adopts the Venturi tube spraying, and formed milk sap dispersion system is easy to into powder in spray process, and moisture is easy to remove.In spray process, compressed air stream forms vacuum gravitation at the Venturi tube venturi, makes material easily and the air-flow mixing, and streams is drawn out of by negative pressure, does not need the handling equipments such as liquid pump or spiral pump.The power that spray art consumes is less, and intrinsic safety is higher.
Embodiment 1:
Produce 10kg emulsified powdered nitramon raw material used as follows:
Ammonium nitrate 8.4kg(84.0%)
SODIUMNITRATE 0.5kg(5.0%)
Water 0.6kg(6.0%)
SEMI-REFINED PARAFFIN WAX (No. 58) 0.2kg(2.0%)
Ceresine (No. 75) 0.1kg(1.0%)
T-703 0.2kg（2.0%）
Produce the emulsified powdered nitramon concrete operation step as follows:
The first step: add vessel in heating to dissolve in ammonium nitrate, SODIUMNITRATE and water, and be warmed up to 135 ℃;
Second step: by SEMI-REFINED PARAFFIN WAX, ceresine and T-703 heat fused, and be warmed up to 100 ℃;
The 3rd step: (850rmin under whipped state
-1) the water material is joined in oil phase material and mixes, then stir 1min, form uniform pasty mixture;
The 4th step: pasty mixture prepared by the 3rd step forms powder type explosive mixture (feed rate 10kgmin through spraying plant shown in Figure 1
-1, stream pressure 0.2MPa);
The 5th step: powder type explosive mixture (60 ℃～70 ℃) the dry 1h in loft drier by the 4th step makes, then dress up powder stick with the filling powdery explosives machine.
When charge diameter is 35mm, charge density is 0.92gcm
-3The time, the moisture content of explosive composition is 0.20%, records the product blast performance to be: explosion velocity 3580ms
-1, induced detonation 12cm, capacity for work 336ml.
Embodiment 2:
Produce 10kg emulsified powdered nitramon raw material used as follows:
Ammonium nitrate 8.70kg(87.0%)
SODIUMNITRATE 0.2kg (2.0%)
Water 0.60kg(6.0%)
SEMI-REFINED PARAFFIN WAX (No. 58) 0.20kg(2.0%)
Ceresine (No. 75) 0.05kg(0.5%)
Machine oil (No. 20) 0.10kg(1.0%)
T-703 0.15kg（1.5%）
Produce emulsified powdered nitramon concrete operation step and experiment condition with embodiment 1.
When charge diameter is 35mm, charge density is 0.95gcm
-3, when the moisture content of explosive composition is 0.20%, records the product blast performance and be: explosion velocity 3960ms
-1, induced detonation 13cm, capacity for work 341ml.
Embodiment 3:
Produce 10kg emulsified powdered nitramon raw material used as follows:
Ammonium nitrate 8.90kg(89.0%)
Water 0.60kg(6.0%)
Compound wax (MF-1) 0.35kg(3.5%)
T-708 0.15kg（1.5%）
Produce emulsified powdered nitramon concrete operation step and experiment condition with embodiment 1.
When charge diameter is 35mm, charge density is 0.95gcm
-3, when the moisture content of explosive composition is 0.20%, records the product blast performance and be: explosion velocity 4050ms
-1, induced detonation 12cm, capacity for work 345ml.
Embodiment 4:
Produce 10kg emulsified powdered nitramon raw material used as follows:
Ammonium nitrate 8.4kg(84.0%)
SODIUMNITRATE 0.5kg(5.0%)
Water 0.6kg(6.0%)
Compound wax (MF-1) 0.3kg(3.0%)
T-703 0.2kg（2.0%）
Produce the emulsified powdered nitramon concrete operation step as follows:
The first step: add vessel in heating to dissolve in ammonium nitrate, SODIUMNITRATE and water, and be warmed up to 135 ℃;
Second step: by compound wax (MF-1) and T-703 heat fused, and be warmed up to 100 ℃;
The 3rd step: (1100rmin under whipped state
-1) the water material is joined in oil phase material and mixes, then stir 1min, form uniform pasty mixture;
The 4th step: pasty mixture prepared by the 3rd step forms powder type explosive mixture (feed rate 15kgmin through spraying plant shown in Figure 1
-1, stream pressure 0.3MPa);
The 5th step: powder type explosive mixture (60 ℃～70 ℃) the dry 1h in loft drier by the 4th step makes, then dress up powder stick with the filling powdery explosives machine.
When charge diameter is 35mm, charge density is 0.95gcm
-3The time, the moisture content of explosive composition is 0.20%, records the product blast performance to be: explosion velocity 4280ms
-1, induced detonation 12cm, capacity for work 341ml.
Embodiment 5:
Produce 10kg emulsified powdered nitramon raw material used as follows:
Ammonium nitrate 8.4kg(84.0%)
SODIUMNITRATE 0.5kg(5.0%)
Water 0.6kg(6.0%)
Compound wax (MF-1) 0.3kg(3.0%)
T-708 0.2kg（2.0%）
Produce the emulsified powdered nitramon concrete operation step as follows:
The first step: add vessel in heating to dissolve in ammonium nitrate, SODIUMNITRATE and water, and be warmed up to 135 ℃;
Second step: by compound wax (MF-1) and T-708 heat fused, and be warmed up to 100 ℃;
The 3rd step: (1100rmin under whipped state
-1) the water material is joined in oil phase material and mixes, then stir 1min, form uniform pasty mixture;
The 4th step: pasty mixture prepared by the 3rd step forms powder type explosive mixture (feed rate 15kgmin through spraying plant shown in Figure 1
-1, stream pressure 0.3MPa);
The 5th step: powder type explosive mixture (60 ℃～70 ℃) the dry 1h in loft drier by the 4th step makes, then dress up powder stick with the filling powdery explosives machine.
When charge diameter is 35mm, charge density is 0.95gcm
-3The time, the moisture content of explosive composition is 0.20%, records the product blast performance to be: explosion velocity 4350ms
-1, induced detonation 12cm, capacity for work 345ml.
Embodiment 6:
Produce 10kg emulsified powdered nitramon raw material used as follows:
Ammonium nitrate 8.90kg(89.0%)
Water 0.60kg(6.0%)
Compound wax (MF-1) 0.35kg(3.5%)
T-703 0.15kg（1.5%）
Produce the emulsified powdered nitramon concrete operation step as follows:
The first step: add vessel in heating to dissolve in ammonium nitrate and water, and be warmed up to 135 ℃;
Second step: by compound wax (MF-1) and T-703 heat fused, and be warmed up to 100 ℃;
The 3rd step: (1100rmin under whipped state
-1) the water material is joined in oil phase material and mixes, then stir 1min, form uniform pasty mixture;
The 4th step: pasty mixture prepared by the 3rd step forms powder type explosive mixture (feed rate 15kgmin through spraying plant shown in Figure 1
-1, stream pressure 0.3Pa);
The 5th step: powder type explosive mixture (60 ℃～70 ℃) the dry 1h in loft drier by the 4th step makes, then dress up powder stick with the filling powdery explosives machine.
When charge diameter is 35mm, charge density is 0.96gcm
-3The time, the moisture content of explosive composition is 0.20%, records the product blast performance to be: explosion velocity 4560ms
-1, induced detonation 12cm, capacity for work 348ml.
By above-described embodiment, can find out, the present invention fills a prescription simply, adopt the agent of alkyl imidazoline emulsifying salt, do not need very high shearing resistance, just can make oxygenant and combustible agent reach a kind of oil-in-water-type or weak Water in Oil emulsion dispersion system, because its viscosity is little, be convenient to flowing and carrying of material, moisture is easy to remove, and facilitates follow-up spraying to become the smooth enforcement of powder, air stream drying, and blast performance is good, the product shelf-stable, have certain water repelling property; Adopt Venturi tube to spray into powder, compressed air stream produces in Venturi tube vacuum gravitation makes streams be drawn out of by negative pressure, mixture does not need to increase the handling equipment of liquid pump or spiral pump and so on, and the energy consumption in production process is little, and the production technique intrinsic safety is high, production capacity is large, with low cost.
Claims (6)
1. a powder emulsified ammoniumnitrate explosives, is characterized in that, comprises the following composition mixed with mass percent:
Ammonium nitrate 89～95, SODIUMNITRATE 0～5.5, oil phase material 3～5, alkyl imidazoline emulsifying salt agent 1.5～2.5,
Water 0.1～0.3;
Wherein, the compositions of mixtures oxygenant of ammonium nitrate or ammonium nitrate and SODIUMNITRATE, oil phase material and the agent of alkyl imidazoline emulsifying salt form combustible agent, and by emulsification, liquid-phase mixing, spraying drying form a kind of uniform oily peritectic explosive composition.
2. powder emulsified ammoniumnitrate explosives according to claim 1, is characterized in that: the saturated branched alkane derivative of described oil phase material employing.
3. powder emulsified ammoniumnitrate explosives according to claim 2, it is characterized in that: described saturated branched alkane derivative refers to one or more mixing of SEMI-REFINED PARAFFIN WAX, ceresine, compound wax, machine oil.
4. powder emulsified ammoniumnitrate explosives according to claim 1, it is characterized in that: described alkyl imidazoline salt emulsifying agent refers to: dodecenylsuccinic acid 17 alkenyl imidazoline salt T-703 or alkylphosphonic acid carboxylic acid imidazoline salt T-708.
5. powder emulsified ammoniumnitrate explosives according to claim 1, it is characterized in that: described by emulsification, liquid-phase mixing, spraying drying form a kind of uniform oily peritectic explosive composition, and concrete operation step is as follows:
The first step: add vessel in heating to dissolve in ammonium nitrate, SODIUMNITRATE and water, when temperature is heated to 135 ℃, dissolve complete, 135 ℃～138 ℃ lower heat preservation for standby use;
Second step: oil phase material and alkyl imidazoline salt emulsifying agent are joined to container together, be heated to 100 ℃ and melt fully to it, form uniform oil phase, 100 ℃～120 ℃ lower heat preservation for standby use;
The 3rd step: the container that will contain oil phase fixes, and loads onto stirring rake, at rotating speed 850rmin
-1～1100rmin
-1Under whipped state, the water material is joined in oil phase material, after feeding in raw material, continue to stir 1min, obtain the finely dispersed pasty mixture of two-phase;
The 4th step: pasty mixture prepared by the 3rd step joins in the insulation hold tank of spraying plant, when compressor reaches pressure 0.2MPa～0.3MPa, open compressed-air actuated stopping valve and hold tank baiting valve, make pasty mixture spray into loading head by Venturi tube, feed rate is 10kgmin
-1～15kgmin
-1
The 5th step: the pulverulent mixture that will collect from loading head is loft drier, and 60 ℃～70 ℃ dry 1h, then dress up powder stick with the filling powdery explosives machine, powder-charge temperature<40 ℃.
6. powder emulsified ammoniumnitrate explosives according to claim 1, it is characterized in that: the spraying plant in step 4 comprises air compressor, gas connection pipe, Venturi tube and the loading head connected successively, and is arranged on the stopping valve on gas connection pipe and is arranged on the hold tank on Venturi tube.
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|---|---|---|---|
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|---|---|---|---|
| CN201310375106.5A CN103408388B (en) | 2013-08-26 | 2013-08-26 | Powdery emulsion ammonium nitrate explosive |
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| CN103408388B CN103408388B (en) | 2015-12-23 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103922873A (en) * | 2014-03-15 | 2014-07-16 | 南京理工大学 | Swelling agent and application of same in modification of barium nitrate into lightweight barium nitrate |
| CN104212502A (en) * | 2014-08-17 | 2014-12-17 | 青岛蓬勃石油技术服务有限公司 | Petroleum product composite additive and preparation method thereof |
| CN106554241A (en) * | 2016-08-03 | 2017-04-05 | 湖北凯龙化工集团股份有限公司 | High density bulking ammonium oil explosive-source explosive post production line and production method |
| CN111233588A (en) * | 2020-03-19 | 2020-06-05 | 江西宜丰国泰化工有限责任公司 | Pneumatic continuous explosive mixing device for production of expanded explosives |
| CN116903425A (en) * | 2023-08-02 | 2023-10-20 | 北京理工大学 | LLM-105/HNS jet blending crystal preparation device and preparation method |
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| CN103922873B (en) * | 2014-03-15 | 2016-04-20 | 南京理工大学 | A kind of swelling agent and the application in nitrate of baryta lighting modification thereof |
| CN104212502A (en) * | 2014-08-17 | 2014-12-17 | 青岛蓬勃石油技术服务有限公司 | Petroleum product composite additive and preparation method thereof |
| CN106554241A (en) * | 2016-08-03 | 2017-04-05 | 湖北凯龙化工集团股份有限公司 | High density bulking ammonium oil explosive-source explosive post production line and production method |
| CN111233588A (en) * | 2020-03-19 | 2020-06-05 | 江西宜丰国泰化工有限责任公司 | Pneumatic continuous explosive mixing device for production of expanded explosives |
| CN116903425A (en) * | 2023-08-02 | 2023-10-20 | 北京理工大学 | LLM-105/HNS jet blending crystal preparation device and preparation method |
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