CN1083538A - The preparing zinc-oxide by use of plasma method Processes and apparatus - Google Patents
The preparing zinc-oxide by use of plasma method Processes and apparatus Download PDFInfo
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Abstract
The present invention relates to the Processes and apparatus of producing ultra-fine ultrapure active zinc flower with plasma method.Key of the present invention is to improve the wet process technique of zinc oxide, has replaced muffle furnace or rotary kiln with plasma generator, and roasting pyrolysis, pulverizing, the refinement of zinc subcarbonate are once finished in producer, realizes serialization production and technological process.This technological process relies on special-purpose plasma generator provided by the invention, and the device that controlled level pressure apparatus for feeding starch and product morphology control device are formed is realized.Thereby make the zinc oxide fineness of producing reach 0.02 μ m, purity can reach 99.9%, is needle-like or ball-like structure.And the low pollution of power consumption is little, is the significant improvement of relevant wet process technique.
Description
The invention belongs to method and specific equipment that a kind of metallic zinc compound is produced, specifically to the significant improvement of wet production zinc oxide Processes and apparatus.
Zinc oxide is important basic chemical industry raw material, is widely used in industries such as rubber, chemical fertilizer, paint, medicine, makeup, printing and dyeing, papermaking, enamel, cable, electronics and tackiness agent.Along with modernization of industry process demand is increasing, and also more and more higher to its performance requriements.Zinc oxide production at present mainly contains following three kinds of technologies:
(1) direct method (claiming U.S.'s method again) is to be raw material with the zinc ore concentrate with boiling sintering desulfuration, mixes briquetting again with tackiness agent, coal dust etc. and is put into and steams zinc in the Wei Teli stove, again zinc oxide product is just made in the zinc fume oxidation, and the microtexture of this product is a needle-like.(2) indirect method (claiming the method national law again) is to be raw material with the zinc ingot metal, removes the zinc ingot metal scum silica frost with method of fusion earlier, metallic zinc is put into high-temperature crucibles again and at special oxidizing chamber the zinc fume oxidation is promptly obtained zinc oxide product (spherical) under 1250 °-1300 ℃.More than two kinds of technologies all be called dry production.Because the particle that obtains in the zinc oxidising process is thicker, need pulverize again, operations such as selection by winnowing are finished thinning processing.But its product is difficult to accomplish all even meticulous.Owing to will pass through zinc refine process, energy consumption is bigger, and total cost is also higher, but its purity that generates zinc oxide is higher, can reach more than 99%.(3) comparatively advanced at present technology is wet production zinc oxide.It is with rough zinc oxide or to contain the zinc thing be raw material, purify with sulfuric acid or bicarbonate of ammonia, produce zinc subcarbonate earlier, then zinc subcarbonate is put into muffle furnace or rotary kiln calcining 4 hours, just can make thinner porous spherical zinc oxide, being called active zinc flower, bigger specific surface area is arranged, is the significant improvement to the product structure performance.Yet because combustionmaterial directly contacts with product in calcination process, can't make decomposition course avoid polluting, its product purity is generally at 95-98%, and granularity is also only crossed sieve level on the 200th.In addition, its energy consumption is bigger, and the production cycle is long and can't realize serialization production, thereby the present domestic production amount of wet production is less, and product purity is low, has influence on the popularization and the application of active zinc flower.
The present invention seeks to the technology of wet production zinc oxide is made improvement, roasting decomposition, the dispersion and fining operation of zinc subcarbonate concentrated in the plasma reactor carry out, decompose and thinning process thereby finish under the formation closed environment, avoid polluting, and cutting down the consumption of energy significantly forms the continuous production processes of ultra-fine high-purity active zinc oxide, and designs the plasma reactor and the corollary apparatus thereof of ultra-fine high-purity active zinc oxide by processing requirement.
Basic design of the present invention is based upon on the theoretical basis of plasma chemical industry.The performance index key of active zinc flower is a specific surface area, and this depends on the granularity and the shape of product, and next depends on purity.For obtaining high performance active zinc flower, the key of wet process technique is to control the maturing temperature of zinc subcarbonate.In traditional technology, technological control temperature about 650 ℃, roasting 4 hours.Time is short or temperature is low all can influence finishing of decomposition course, and the high time length of temperature then can cause growing up of zinc oxide grain and lose high-specific surface area.Thereby the speed and the energy that depend primarily on heating from zinc subcarbonate is converted into the chemical process of zinc oxide provide insufficient.Thereby enough decomposition heatly just can control growing up of crystal grain effectively and obtain ultrafine active oxidation zinc product if zinc carbonate is obtained.In plasma reactor, can realize these processing condition.Heat energy is normally by convection current, and radiation and these three kinds of modes of conduction are transmitted.In plasma reactor, also can produce compound heat transfer process.Can form plasma state when gas enters reactor after producing plasma arc under the electromagnetic field effect, a large amount of molecules are cracked into atom, and part of atoms can be ionized into ion, electronic state.This state is unsettled.Fashionable when the zinc carbonate powder with the ion conductance, can produce recombination process at reaction-ure surface, promptly two atoms can be combined into molecule, and ion and electronics can be combined into atom, simultaneously ionization energy are passed to zinc carbonate, finish the heat transmission in the short period of time at the utmost point.In addition, because plasma temperature very high (5000-50000 ℃), thereby radiative transfer is a main heat transfer process, its heat transfer rate also is exceedingly fast.Zinc carbonate is decomposition heat mainly to be obtained by this dual mode.Thereby, in plasma reactor, can finish abundant heating in the short period of time at the utmost point fully to zinc subcarbonate, as long as suitable proportioning is advanced powder density and control plasma arc power, then finishing fast in plasma reactor and fusing decomposition course is feasible scheme.Powder enters behind the plasma arc district because rate of heating is extremely short, and a large amount of gas (H are arranged simultaneously
2O, CO
2) excessive rapidly from particle inside, cause material grain rapid expansion, produce from crushing process.Thereby, when roasting is decomposed, also realized the pulverizing and the refinement of product.Obviously, replace the aborning muffle furnace of conventional wet or rotary kiln with the high frequency plasma reactor and can once finish dispersion and fining zinc subcarbonate roasting decomposition and product, thus form constantly reinforced, the serialization production process of constantly collecting final product.The improvement main points of the present invention just that this technology is made wet production zinc oxide technology.Specific embodiment involved in the present invention following (can with reference to figure 1):
(1) middle product zinc subcarbonate is roughly selected, should be reached chemical pure product standard in principle, can import plasma reactor smoothly, make product can reach the purity of expection to protect powder;
(2) the zinc subcarbonate powder is sent into a controlled level pressure powder feeder, with the constant airshed, with quantitative powder input plasma reactor;
(3) make the gas powder stream that contains powder inject the plasma arc district of plasma reactor, thereby realize the roasting decomposition and the dispersion and fining process of zinc carbonate with constant density and flow.In this procedure, require to realize as far as possible powder homodisperse in the plasma arc district, thereby and stop the regular hour and guarantee to decompose fully and the even quality of refinement;
(4) will be zinc oxide gas powder mixture behind the dispersion and fining cause product morphology control device, form ultrafine spherical or acicular type zinc oxide product by mode and the temperature variation that imports cooling gas;
(5) finished product is introduced settling vessel and bag collector, the gas powder is separated after with the final product collecting packing.
For making above technical process can realize purpose of the present invention in high quality, further explain following key problem in technology:
To enter the technology and the means in plasma arc district be one of key of the present invention to the basic carbonate zinc powder in adding the powder operation.Because have only zinc carbonate is effectively sent into the plasma arc district, could realize the fast pyrogenation process.The key here is that powder enters the characteristic that the plasma arc district must meet plasma body.Otherwise, not that powder can add, exactly plasma arc is put out.So require the zinc carbonate powder evenly to spray into from plasma lamp torch top or surrounding according to the characteristic of high frequency plasma arc, wherein, the plasma (orifice) gas that enters of limit rotates into the plasma arc district under driving with the constant flow.So not only can effectively utilize energy of plasma, and in powder adds plasma body, scatter and to make full use of radiant heat energy.For realizing that above process program should guarantee that at first zinc subcarbonate has ideal powder handling machinery.Zinc subcarbonate frit viscosity large fluidity is poor, wants stably to carry quantitative powder that special powder e Foerderanlage must be arranged.Consider that from processing parameter the static pressure in the designed powder handling machinery should be higher than the reaction pressure 300mmH in the plasma reactor
2More than the O post, the density of dusting of control is 1.0-3.5 kilogram/rice
3In two above key process parameters, previous principal security powder can spray into reactor effectively, and the density of dusting guarantees that then powder might realize the dispersiveness of processing requirement.As for the setting that sprays into speed decision plasma reactor power of gas powder, because speed determines the unit time to enter the powder heavy burder in plasma arc district.In roasting pyrolysis after powder enters reactor, this procedure of dispersion and fining, it is 0.8-2.0KW/KG that the processing parameter of being controlled mainly contains (1) effective heating intensity I, effectively heating intensity I mainly is meant the plasma arc active power that the unit weight powder distributes, and it depends on the output rating and the anode efficiency of high frequency electric source.This processing parameter setting can guarantee have enough heats to supply with after a certain amount of powder enters reaction arc district.Under enough power settings, the control powder can be realized the design objective of this road technology in reaction arc district second fully by (or claiming to stop) 0.08-0.15.In this procedure, two important technical parameters in addition that need provide, one is limit gas feeding amount, one is middle gas feeding amount, so-called limit gas is that plasma reactor enters limit silica tube air by lamp holder, middle gas is the air of silica tube in being introduced by lamp holder, be normal temperature gas (25 ℃), in tangentially importing, limit gas forms eddy flow will make the powder that sprays into through lamp holder fully discrete, and the plasma arc district is introduced in rotation, thereby effectively utilize the energy in arc district, high quality is fully finished chemical reaction process.The data limit gas feeding amount selected according to repetition test is 6-10 rice
3/ hour, middle gas feeding amount is a 1.5-2.5 rice
3/ hour.
What drawn by reactor is high temperature oxidation zinc gas powder mixture behind the dispersion and fining, and it enters carries out cooling process in the morphology control device, form the zinc oxide of different shape crystal grain.Add from top with normal temperature (25 ℃) as cold gas in the morphology control device, the 40-60% that air flow is controlled to be limit gas then can generate the active oxidation zinc product of spherical vesicular structure.Add from morphology control device bottom as cold gas, the aerating temperature is below 350 ℃, and air flow is the 50-70% of limit gas, then can generate the acicular active zinc flower of porous.
Provide three embodiment (power of high frequency electric source is constant) processing parameter below the technical factor of the present invention for further specifying.
Embodiment 1:
Static pressure difference in the apparatus for feeding starch: 400mmH
2The O post
The density of dusting 2.5KG/ cubic meter
The effective heating intensity of plasma body (I) 0.9KW/KG
Powder waits 0.1 second subarc district's residence time (t) in producer
Limit gas feeding amount: 7.6 cubic metres/hour (25 ℃)
Middle gas feeding amount: 2.4 cubic metres/hour (25 ℃)
Top cold gas feeding amount (25 ℃) 4.1 cubic metres/hour (spherical)
Bottom cold gas feeding amount (341 ℃) 5.1 cubic metres/hour (needle-like)
Embodiment 2:
Apparatus for feeding starch static pressure difference: 310mmH
2The O post
The density of dusting: 1.1KG/ cubic meter
The effective heating intensity of plasma body (I) 2.0KW/KG
Powder was 0.15 second plasma arc district residence time
6.5 cubic metres/hour of limit gas feeding amounts (25 ℃)
2.0 cubic metres/hour of middle gas feeding amounts (25 ℃)
Top adds cooling tolerance (25 ℃) 2.6 cubic metres/hour (spherical)
The bottom adds cooling tolerance (345 ℃) 3.25 cubic metres/hour (spherical)
Embodiment 3:
Apparatus for feeding starch static pressure difference 500mmH
2The O post
The density of dusting 3.5KG/ cubic meter
The effective heating intensity of plasma body (I) 0.8KW/KG
Between the plasma arc district stopping time 0.08 second
9.5 cubic metres/hour of limit gas feeding amounts (25 ℃)
1.8 cubic metres/hour of middle gas feeding amounts (25 ℃)
Top cold gas feeding amount (25 ℃) 5.7 cubic metres/hour (spherical)
Bottom cold gas feeding amount (381 ℃) 6.6 cubic metres/hour (needle-like)
As can be seen, for the high frequency electric source of rated output, the zinc carbonate powder that is added all can ordinary production go out high-quality active oxidation zinc product within very big density setting range from given embodiment.In, the injection rate sum of limit gas remain essentially in the 8.5-10.0 cubic meter/hour between.In the air flow adjustment of limit gas be mainly used to realize impedance matching with high frequency electric source, thereby electric conversion efficiency is reached more than 55%.Adopt above technical process and basic technology parameter but can realize producing superfine active zinc oxide with plasma method.
Further specify below to realizing the custom-designed device of operational path of the present invention.
The high frequency plasma reactor is the basic equipment of plasma chemical industry aspect.Comprise a high frequency electric source and a plasma generator in its essentially consist, this cover of the special requirement of the requirement of technical process and processed zinc subcarbonate also comprises a controlled constant-pressure type zinc carbonate feeder in specially putting according to the present invention, feeder mainly is according to the physicals of zinc subcarbonate and particular design, with the input plasma generator that guarantees that powder can be reliable and stable.Because this powder kinetic viscosity is bigger, realize that continuous, constant feeding is not easily.Controlled powder amount and constant static pressure difference are two basic design conditionss.This feeder none dusts and mouthful links to each other with the axial powder inlet of plasma generator lamp torch head.The morphology control device is to add the implantation site and add an additional unit of temperature variation control finished product zinc oxide grain form by cold gas, it be round barrel shape directly and plasma reactor bottom discharge port connect.
The basic structure that further specifies device below in conjunction with accompanying drawing concerns with realizing the object of the invention:
Fig. 1 is a process flow diagram of the present invention.
Fig. 2 is the connection diagram of each chief component in the isolated plant of the present invention.
Fig. 3 is this device ionic medium producer lamp torch structural representation, and Fig. 3 A-A is that middle gas feeds synoptic diagram, and Fig. 3 B-B feeds synoptic diagram for limit gas.
Fig. 4 is the structural representation of feeder.
Wherein on behalf of the zinc subcarbonate in the technology of the present invention, A roughly select front travel, B represents controlled quantitative powder feeding operation, roasting pyrolysis and dispersion and fining operation are finished in the C representative in plasma reactor, D represents zinc oxide grain morphology control operation, E representative products sedimentation collecting packing operation.Gas feeds in a representative, b representative edge gas feeds, cold gas feeds in the c representative, d representative cold gas down feeds, on behalf of powder, e spray into, and f represents metallic lamp holder, and g represents plasma generator, h represents the morphology control device, i represents apparatus for feeding starch, and j representative is led to gas powder separator and gone to finish the product sedimentation and collect, and l represents in the plasma generator gas guider in the structural plasma of lamp torch, 1A, 1B is middle gas ingress pipe, 2 representative edge gas guiders, 2A-2D are limit gas ingress pipe, the middle silica tube that 3 representatives are connected with middle gas guider 1, the limit silica tube that 4 representatives are connected with limit gas guider, M represents zinc carbonate powder powder inlet.6 is the zinc carbonate powder storage bunker (drum shape) in the feeder structure, 7 representatives are provided with the air inlet pressure pipe of storage bunker 6 upper tops, 8 representatives are arranged on the reverse frustoconic feed supplement trunnion of storage bunker 6 bottoms, 9 representatives are arranged on the cylindrical material spray jar below the feed supplement trunnion 8,10 for being arranged on the loosening powder feeder bottom the powder spraying pot, wherein 10A is a rotation axis, 10B is the loosening blade that is symmetrical distribution that is located in the rotating shaft, 10C is a transmission rig, 11 for being arranged on the dischage tube of powder spraying pot bottom sides, its inlet mouth links to each other with pneumatic circuit, dischage tube outlet links to each other with powder inlet M on the lamp torch, pipe 11 is located at the position, edge of powder spraying pot 9, and powder can freely import pipeline and spray with air-flow.
From accompanying drawing as can be seen, device among the present invention is according to technology and particular design, the operating frequency of high frequency electric source can be selected between the 2-10 megahertz, and the size of power depends primarily on the flow that dusts, and is actually according to yield in unit time to set.The technology of this high frequency electric source is to be not described in detail in this than maturing part in the prior art.
One of gordian technique in this device is the structure design of high frequency plasma reactor.Reactor section is divided into an airtight appearance device, thereby forms an isolated reaction environment of ideal, has avoided pollution, makes zinc oxide might reach high purity, fundamentally changes the defective of wet process technique.It wherein mainly is lamp square structure Design, include two belled silica tubes, (center silica tube 3, limit silica tube 4) and in, limit gas guider (1,2), and the zinc carbonate powder inlet M that is arranged on guider (1-2) axial direction due, guider (1,2) is provided with ingress pipe (1A, the 1B that tangentially imports plasma gas, 2A-2D), promptly form inside and outside two-layer rotational gas flow after gas enters like this.(center or periphery) sprays into back homodisperse under the rotational gas flow effect with axial direction due from the top at powder.Suitably in the control, the limit airshed can make powder import the plasma arc district smoothly and arc not put out again, can make full use of radiant heat and plasma Composite heat energy simultaneously, realizes pyrolysis at the utmost point in the short period of time, refinement, obtain ultra-fine, hyperpure active oxidation zinc product.Powder inlet M can design at the center, also can design 2-4 powder inlet on the periphery of limit gas guider 2.
For guaranteeing the quality of product, after plasma power was determined, key was how steady and continuous ground is sent into quantitative powder in the reactor, and controlled constant-pressure type powder feeder then becomes the another key Design in this device.By in the accompanying drawing 4 as can be seen, the zinc carbonate apparatus for feeding starch is made up of following structure: storage bunker he 6, drum-shaped structure.Keep certain material level to keep serialization production by it.The air inlet pressure pipe 7 that is provided with on storage bunker 6 tops is mainly used to replenish air pressure, and the static pressure of adjusting in the feed bin is kept above the interior pressure 300mmH of reactor
2More than the O post, guarantee that powder can spray into reactor smoothly.The effect that is arranged on the platform of falling the garden shape feed supplement trunnion 8 of storage bunker 6 bottoms is to guarantee to form the stable natural angle of rest (repose) of zinc carbonate powder in powder spraying pot 9, thereby forms stable automatic feeding control, makes the amount of dusting control more accurately with stable.According to the result of repetition test, the garden platform bus of feed supplement trunnion 8 and axis angle α are between 30 °-40 °.Be arranged on the cylindrical powder spraying pot 9 that is below the feed supplement trunnion 8, the degree of depth that feed supplement trunnion 8 end faces enter powder spraying pot 9 is a jar high 1/4-1/3, and assurance can form the natural stockpile of 25 ° of-30 ° of cone angles.For making the amount of dusting further controlled and stable, in powder spraying pot 9 bottoms a loosening feed appliance 10 is set, comprise a rotation axis 10A in the concrete structure, be arranged on the loosening blade 10B that is symmetrical distribution on the axle, and make axle produce the transmission rig 10C of rotation.Adjust rotating speed and can realize aeration level stockpile, the position that powder is delivered in time dust mouthful, under the effect of gaseous blast with the powder input reactor.Dischage tube 11 is arranged on the bottom sides of powder spraying pot, its inlet mouth and pneumatic circuit join, stuff-spraying pipe 11 outlet is connected with powder inlet M on the plasma generator, take the apparatus for feeding starch of above structure, the constant pressure difference of maintenance and reactor can be realized automatic feeding in trunnion 8 effects, blade rotational speed adjustment decision aeration level and benefit powder speed, that thereby a powder that makes the ejection of dusting mouthful forms is stable, measure control accurately, this gordian technique measure of being achieved of the object of the invention just.
In isolated plant involved in the present invention, some is called the morphology control device, is expressed as the straight drum shape part h that is connected on below the response controller 8 in accompanying drawing 2.This device is provided with quench gas introducing port (position that ← C refers to) at upper top, is provided with product cold gas introducing port (position that ← d refers to) at lower bottom part, and the lower end of morphology control device is a discharge port, is connected to gas powder separator (being product sedimentation collection device).This part-structure design is mainly used to control the grain form of the finished product.If feed the normal temperature cooling gas from top, the High Temperature Gas powder that comes out from reactor cools off formation superfine spherical crystal grain after flowing to the morphology control device suddenly.If can descend from its refrigerative speed of lower end introducing product cold gas (gas below 350 ℃ of promptly from the product collector, drawing after the blowback), thereby generate ultra-fine acicular type zinc oxide crystal grain.The product of different shape has different ranges of application.
Owing to adopt isolated plant among the present invention, guaranteed the feasibility of technology of the present invention in sum.Adopt the high-frequency plasma generator operational process in this device reliable by the repetition test proof, it is convenient that the powdery zinc carbonate is gone into arc, the in very large range adjustable steady running and the coupling that does not influence plasma body of density of going into powder changes, and electric conversion efficiency can reach more than 55%.The zinc carbonate frit viscosity is big, the weakness of mobile difference and special-purpose feeder has overcome fully, utilize the storage bunker material level, intake pressure difference, loosening feed appliance rotating speed and dust the controlled means of tolerance multiple tracks just dusting speed and powder amount keep stable and accurately quantitatively, thereby for realizing that the high quality serialization produces the condition of having created.Because powder is accurately sent into the plasma arc district quantitatively, in plasma body, realize rapid heating, refinement has possessed the technology operability, the super fine zinc oxide that generates enters the hurried cooling of morphology control device and forms ultra-fine needle-like or ultra-fine spherical active zinc flower, the then feasibility of a furthermore bright technology and advance, the average fineness of the finished product can reach 0.02 μ m in the serialization production process that device and technology form more than adopting, purity can reach 99.92%, form is a needle-like, spherical controlled, so its final effect reaches the set of the best techniques index of three kinds of traditional technologys.Its product is produced on probation through rubber industry, reach the technical requirements of product fully.The specific surface area of zinc oxide can reach more than 45 meters squared per gram.Its energy consumption is 3,400,000 kilocalorie/tons, than present direct method (1,250 ten thousand kilocalorie/ton) and wet method (950-1360 ten thousand kilocalorie/tons) reduction is significantly arranged all.Particularly can realize serialization production, create condition for it forms the commodity production scale.Thereby, adopt device and technology among the present invention, can produce high pure and ultra-fine degree active zinc flower, be that significant improvement and the breakthrough in the present zinc oxide production technology has dissemination.
Claims (9)
1, a kind of with rough zinc oxide or to contain the zinc thing be raw material, through sulfuric acid or ammonium hydrogencarbonate purify, impurity elimination, drying make zinc subcarbonate, again the roasting of zinc subcarbonate is decomposed, dispersion and fining obtains the zinc oxide manufacture craft of the finished product at last, it is characterized in that adopting in this technology the high frequency plasma reactor to replace traditional muffle furnace or rotary kiln, roasting to zinc subcarbonate is decomposed, the pulverizing of product and process for refining concentrate on once to finish in the plasma reactor and form the serialization production process, and the improved technical process of institute is as follows:
A, middle product zinc subcarbonate roughly selected make it enter the reactor standard to reach chemical pure,
B, the zinc carbonate material is sent into controlled level pressure powder feeder powder is imported plasma generator with the constant air-flow,
C, the plasma arc district that the gas powder is flowed with constant density and flow injection plasma generator realize the roasting decomposition of zinc carbonate and the dispersion and fining of zinc oxide,
D, gas powder mixture behind the dispersion and fining is caused product morphology control device feed cooling gas and form ultra-fine spherical or acicular zinc oxide product,
E, finished product is introduced settling vessel and bag filter collecting packing.
2,, it is characterized in that the static pressure in the controlled level pressure powder feeder should be higher than plasma generator internal reaction pressure 300mmH according to the said zinc oxide manufacture craft of claim 1
2More than the O post, controlling the density of dusting is 1.0-3.5 kilogram/rice
3
3,, it is characterized in that the control process parameters in the plasma generator is according to the said zinc oxide manufacture craft of claim 1:
Effective heating intensity (I): 0.8-2.0KW/KG
Powder is in the plasma arc district residence time: 0.08-0.15 second
Limit gas feeding amount (25 ℃): 6-10 rice
3/ hour
Middle gas feeding amount (25 ℃): 1.5-2.5 rice
3/ hour.
4,, it is characterized in that the processing parameter that gas powder mixture enters the morphology control device is according to the said zinc oxide manufacture craft of claim 1:
It is that 25 ℃ of air flows are the 40%-60% of limit gas feeding amount that a, cooling gas add temperature from top,
B or cold gas add from the bottom, and the aerating temperature is lower than 350 ℃, and air flow is the 50-75% of limit gas.
5, plasma method is produced the device of superfine active zinc oxide, by high frequency electric source, plasma generator g forms, it is characterized in that also including in this device a controlled constant-pressure type zinc carbonate feeder i and a super fine zinc oxide morphology control device h, wherein the dischage tube 11 of feeder and the axial powder inlet M on the plasma generator metallic lamp holder join by pipeline, and morphology control device g is round barrel shape bottom discharge port direct and plasma generator and connects.
6, according to the said device of claim 5, it is characterized in that the high frequency electric source frequency setting in this device is the 2-10 megahertz, power is determined according to the flow that dusts.
7,, it is characterized in that the lamp torch structure of this device ionic medium producer consists of the following components according to the said device of claim 5:
Gas guider 1 in a, the plasma has two airway 1A that tangentially are provided with, 1B,
B, plasma limit gas guider 2 have 2-4 airway 2A, 2B, 2C, 2D that tangentially is provided with,
C, the center silica tube 3 that is connected with middle gas guider,
D, the limit silica tube 4 that is communicated with limit gas guider,
E, be arranged in the axial powder inlet M of zinc carbonate powder of gas guider center or limit gas guider periphery.
8, according to the said device of claim 5, its spy is that controlled constant-pressure type zinc carbonate powder feeder i is made up of following structure division:
A, zinc carbonate powder storage bunker 6, columnar structured,
B, be arranged on the air inlet pressure pipe 7 of storage bunker 6 upper tops,
C, be arranged on storage bunker 6 bottom reverse frustoconic feed supplement trunnions 8, the angle α of round platform bus and axis is 30 °-40 °,
D, be arranged on the cylindrical powder spraying pot 9 below the feed supplement trunnion 8, feed supplement trunnion 8 bottoms enter powder spraying pot 9 degree of depth and account for a jar high 1/4-1/3,
E, be arranged on the loosening feed appliance 10 of powder spraying pot 9 bottoms, concrete structure is arranged on the loosening blade 10B and the transmission rig 10C that are symmetrical distribution on the rotation axis and is formed by a rotation axis 10A,
F, be arranged on the dischage tube 11 of powder spraying pot 9 bottom sides, its import and pneumatic circuit join, and the dischage tube outlet is connected with zinc carbonate powder powder inlet M on the plasma generator by pipeline.
9, according to the said device of claim 5, it is characterized in that morphology control device h is straight drum shape in this device, be provided with but conductance inlet of quenching at upper top, be provided with product cold gas introducing port at lower bottom part, the lower end of morphology control device h is a discharge port, is connected to gas powder separator (being product sedimentation collection device).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92109794 CN1083538A (en) | 1992-08-29 | 1992-08-29 | The preparing zinc-oxide by use of plasma method Processes and apparatus |
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|---|---|---|---|
| CN 92109794 CN1083538A (en) | 1992-08-29 | 1992-08-29 | The preparing zinc-oxide by use of plasma method Processes and apparatus |
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| CN110402008A (en) * | 2019-08-26 | 2019-11-01 | 贵州正业龙腾新材料开发有限公司 | A kind of cooling gas distributor suitable for high frequency plasma torch |
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1992
- 1992-08-29 CN CN 92109794 patent/CN1083538A/en active Pending
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| CN1035870C (en) * | 1994-08-11 | 1997-09-17 | 重庆化肥矿山工业公司 | Process for producing high-dispersivity active zinc oxide |
| CN1079080C (en) * | 1999-09-08 | 2002-02-13 | 中国科学院广州化学研究所 | Preparation method of zinc oxide microparticles with specific form |
| CN102126746A (en) * | 2011-05-05 | 2011-07-20 | 贵州正业工程技术投资有限公司 | Method and device for preparing nano tin dioxide by using high-frequency plasmas as heat source |
| CN102126754A (en) * | 2011-05-05 | 2011-07-20 | 贵州正业工程技术投资有限公司 | Method and device for preparing nano bismuth trioxide by adopting high-frequency plasmas as heat source |
| CN102849784B (en) * | 2012-05-10 | 2016-08-31 | 樊囿宇 | Plasma (orifice) gas phase reaction produces the method and apparatus of nano zine oxide |
| CN102849784A (en) * | 2012-05-10 | 2013-01-02 | 樊囿宇 | Method and apparatus used for producing nano-grade zinc oxide through plasma gas-phase reaction |
| CN103014316A (en) * | 2012-12-04 | 2013-04-03 | 宜春银锂新能源有限责任公司 | Novel method for processing lepidolite material |
| CN103014317A (en) * | 2012-12-04 | 2013-04-03 | 宜春银锂新能源有限责任公司 | Method for extracting lithium salt from lepidolite |
| CN103014316B (en) * | 2012-12-04 | 2014-11-26 | 宜春银锂新能源有限责任公司 | Novel method for processing lepidolite material |
| CN103014317B (en) * | 2012-12-04 | 2015-02-11 | 宜春银锂新能源有限责任公司 | Method for extracting lithium salt from lepidolite |
| CN107880639A (en) * | 2016-08-15 | 2018-04-06 | 海宁永欣科技咨询有限公司 | The production method of the nanometer leaded light particle of improvement |
| CN108219573A (en) * | 2016-08-15 | 2018-06-29 | 海宁永欣科技咨询有限公司 | A kind of airflow comminution system |
| CN110402008A (en) * | 2019-08-26 | 2019-11-01 | 贵州正业龙腾新材料开发有限公司 | A kind of cooling gas distributor suitable for high frequency plasma torch |
| CN110402008B (en) * | 2019-08-26 | 2024-02-06 | 贵州正业龙腾新材料开发有限公司 | Cooling gas distribution device suitable for high-frequency plasma torch |
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