CN104894401B - A kind of method and apparatus of microwave calcination uranium chemical concentrate - Google Patents
A kind of method and apparatus of microwave calcination uranium chemical concentrate Download PDFInfo
- Publication number
- CN104894401B CN104894401B CN201510258359.3A CN201510258359A CN104894401B CN 104894401 B CN104894401 B CN 104894401B CN 201510258359 A CN201510258359 A CN 201510258359A CN 104894401 B CN104894401 B CN 104894401B
- Authority
- CN
- China
- Prior art keywords
- microwave
- flue gas
- chemical concentrate
- temperature
- calcination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to a kind of method and apparatus of microwave calcination uranium chemical concentrate, belong to microwave metallurgical technical field.Uranium chemical concentrate is passed through high-temperature residual heat flue gas and cold uranium chemical concentrate is preheated by the method, then carries out three section calcinings.The device is made up of microwave generating apparatus, spiral agitator, microwave control device, temperature measuring equipment and flue gas recirculation cleaning system.High-temperature residual heat flue gas is made full use of while the method achieve industrial continuous production, realize that repeats itself is processed, uranium chemical concentrate is directly quickly heated, reduce the loss of material heat, energy utilization rate is improved, the uniformity for improving product avoids the outer row of objectionable impurities and gas simultaneously, realizes clean manufacturing, the appliance arrangement high degree of automation, controllability is strong.
Description
Technical field
The present invention relates to a kind of method and apparatus of microwave calcination uranium chemical concentrate, belong to microwave metallurgical technical field.
Background technology
Uranium be nuclear power industry development material base, to safeguarding national security, energy security, Environmental security have it is great
Strategic importance.Uranium nuclear fuel mainly passes through ore grinding-acid system or alkaline Leaching-mother liquor separation-ion-exchange（Also known as absorption method）
Solution purification removal of impurities-precipitation operation is carried out with solvent extraction, then by sediment washing, press filtration, drying, that is, hydrometallurgy product is obtained
Product uranium chemical concentrate, uranium chemical concentrate obtains core net product U through calcining3O8。
U3O8It is the mete-wand of uranium product yield, with very important status.At present, U3O8Industrially pass through
Calcining uranium chemical concentrate-ammonium diuranate（ADU）Or ammonium uranyl tricarbonate（AUC）Obtain, and traditional electric heating rotary kiln calcining exists
Temperature distributing disproportionation is even on same section, causes production method high energy consumption, and product homogeneity is poor, is also easy to produce underburnt, burning etc. existing
As bringing difficulty to subsequent handling.As patent CN1319848A and patent CN101633521A points out conventional calcining thricarbonate
Prepared by uranyl amine, U3O8Technical process, need to rise to 700-900 DEG C with 300-500 DEG C/h by room temperature, while soaking time is up to
2-6 hours.
Microwave can selectively be heated as a kind of heating means of green high-efficient by the energy dissipation inside material
Material, has the advantages that homogeneous heating, the thermal efficiency are high, it is incomparable to shorten the conventional heatings such as reaction time, and patent（Application number
200910094840.8）The method of a kind of producing triuranium octoxide by microwave calcination of ammonium diuranate for providing, although it realizes thing
The quick heating of material, heat time are short（Calcination time）And certain energy-saving effect is played, but the method is limited only to small material
Amount（15g）Pilot plant test, its treatment inventory is few, and industry continuous feeding and discharging, large-scale production is not implemented；Secondly, calcination process
Material is not stirred causes product homogeneity poor, while not processed to the high-temperature flue gas that calcination process is produced, there is energy
Source heat utilization efficiency is low and the problems such as production cost high, and the discharge of harmful smoke can have a certain impact to environment.Therefore, such as
What it is cost-effective to uranium chemical concentrate carry out calcining production prepare U3O8, while realize high-temperature flue gas heat recovery with
Further reducing energy consumption, improves heat utilization efficiency, realizes being realized while industrial continuous large-scale production that clean manufacturing is at present urgently
The problem that need to be solved.
The content of the invention
For problem and deficiency that above-mentioned prior art is present, the present invention provides a kind of microwave calcination uranium chemical concentrate
Method and apparatus.The method uses three section calcinings, and high-temperature residual heat flue gas is made full use of while realizing industrial continuous production,
Realize that repeats itself is processed, uranium chemical concentrate is directly quickly heated, reduce the loss of material heat, improve using energy source
Rate, the uniformity for improving product avoids the outer row of objectionable impurities and gas simultaneously, realizes clean manufacturing, and the appliance arrangement is automatic
Change degree is high, and controllability is strong, and the present invention is achieved through the following technical solutions.
A kind of method of microwave calcination uranium chemical concentrate, it is comprised the following steps that：
（1）During uranium chemical concentrate added into microwave calcination cavity with the inlet amount of 100 ~ 400kg/h first, microwave is controlled
Speed of agitator is 10 ~ 30r/min in calcining cavity, then passes to high-temperature residual heat flue gas and is preheated to temperature to cold uranium chemical concentrate
It is 300 ~ 500 DEG C；
（2）Uranium chemical concentrate after preheating is carried out into three section calcinings：First in first paragraph calcination process：Control microwave is defeated
Go out power for 20 ~ 35kW, calcining heat is 800 ~ 850 DEG C, calcination time is 3 ~ 6min；Then second segment microwave calcination process
In：Regulation microwave output power is 25 ~ 55kW, and calcining heat is 850 ~ 870 DEG C, and calcination time is 3 ~ 6min；Finally carry out
Three sections of microwave calcinations：Regulation microwave output power is 35 ~ 60kW, and calcining heat is 870 ~ 900 DEG C, and calcination time is 4 ~ 8min,
Room temperature being cooled to through the material after calcining and obtaining triuranium octoxide product, the high-temperature residual heat flue gas for producing in the process is through net
Preheating uranium chemical concentrate is re-used after change, heat exchange.
The step（1）Middle uranium chemical concentrate is ammonium diuranate（ADU）Or ammonium uranyl tricarbonate（AUC）.
The step（1）High temperature waste heat flue-gas temperature is 600 ~ 800 DEG C, and intake is 1 ~ 15m3/ h, operation section
Implementation can make using energy source save 10% ~ 30%.
A kind of device of microwave calcination uranium chemical concentrate, the device is by microwave generating apparatus, spiral agitator, microwave
Control device, temperature measuring equipment and flue gas recirculation cleaning system composition；
The microwave generating apparatus include bearing 17, the heating using microwave cavity 5 being fixed on bearing 17 and are evenly distributed on
Magnetron 6 on heating using microwave cavity 5；
The spiral agitator include reductor 1, helical axis shaft coupling 2, bearing 3, charge door 4, spiral conveying tube 8,
Helical axis 9, helical blade 11, flue gas volatilization mouth 13, discharging opening 16, motor 28, little gear 29, chain 30, gear wheel 31, spiral shell
Rotation transport tube 8 crosses heating using microwave cavity 5, and the side roof part of part one outside spiral conveying tube 8 and heating using microwave cavity 5 is provided with and adds
Material mouth 4, opposite side is provided with flue gas volatilization mouth 13, and the bottom of 13 underface spiral conveying tube of flue gas volatilization mouth 8 is provided with discharging opening 16, spiral shell
Helical axis 9 is crossed in rotation transport tube 8 bosom position, is uniformly distributed on helical axis 9, helical blade 11, and helical axis 9 is near charging
4 sides of mouth are sequentially connected bearing 3, helical axis shaft coupling 2, reductor 1, gear wheel 31, chain 30, little gear 29 and motor
28；
The microwave control device includes temperature indicator 19, microwave power controller 20, microwave unit power source button 21
With microwave controller 22, microwave controller 22 is provided with temperature indicator 19, microwave power controller 20, microwave unit power source button
21, temperature indicator 19 is connected with temperature measuring equipment, and microwave power controller 20 is connected with magnetron 6；
The temperature measuring equipment is inserted from the top surface of spiral conveying tube 8 inside heating using microwave cavity 5；
The flue gas recirculation cleaning system includes pipeline reducing diameter valve 14, flue 15, flue gas cleaner 23, wet wind case
24th, the heat-exchange system 27 and dry-air blast case 26 being made up of heat exchanger 25, flue gas volatilization mouth 13 pass through pipeline reducing diameter valve 14 successively
Connect with flue 15, flue gas cleaner 23, wet wind case 24, the heat-exchange system 27 and dry-air blast case 26 that are made up of heat exchanger 25
Connect, the outlet of dry-air blast case 26 is connected with the bottom of spiral conveying tube 8.
The temperature measuring equipment includes thermocouple temperature measurement instrument, and thermocouple temperature measurement instrument a7, thermocouple temperature measurement instrument c12 add positioned at microwave
The both sides of hot cavity 5, thermocouple temperature measurement instrument b10 is located at the centre position of heating using microwave cavity 5.
The application method of the device is：Microwave unit power source button 21 is first turned on, is adjusted by microwave power controller 20
Whole good microwave power and microwave temperature, then open charge door 4, to material is added in the device, treat after the completion of material calcining from
Discharged in discharging opening 16, the flue gas produced during this is discharged from flue gas volatilization mouth 13, and flue gas is purified through flue gas cleaner 23
Afterwards, through the heat exchange again defeated time bottom of spiral conveying tube 8.
The beneficial effects of the invention are as follows：
（1）Continuous feeding and discharging is the method achieve, is suitable for industrial mass large-scale production, it is with short production cycle；
（2）Calcination process is by two stages realizations, first stage：Warm-up phase --- using high-temperature residual heat flue gas to cold
Material is preheated；Second stage：Calcination stage --- three gradient laser heatings are carried out to material using microwave and is calcined, realize industry
High-temperature residual heat flue gas is made full use of while continuous prodution, uranium chemical concentrate is directly quickly heated, reduce material heat
Loss, improve energy utilization rate, while avoiding the outer row of objectionable impurities and gas, realize clean manufacturing；
（3）Calcination process stirs and pushes material using double helix, strengthens the calcination process of uranium chemical concentrate, while should
Method more fully can completely be calcined using the method for three gradients calcining to uranium chemical concentrate, improve the homogeneity of product；
（4）The present apparatus is easy to operate, the different calcining section temperature of charge of real-time monitoring, digitizes and high degree of automation.
Brief description of the drawings
Fig. 1 is apparatus of the present invention structural representation.
In figure：1- reductors, 2- helical axis shaft couplings, 3- bearings, 4- charge doors, 5- heating using microwave cavitys, 6- magnetrons,
7- thermocouple temperature measurement instrument a, 8- spiral conveying tubes, 9- helical axis, 10- thermocouple temperature measurement instrument b, 11- helical blades, 12- thermocouples
Temperature measurer c, 13- flue gas volatilization mouth, 14- pipeline reducing diameter valves, 15- flues, 16- discharging openings, 17- bearings, 18- trucks, 19-
Temperature indicator, 20- microwave power controllers, 21- microwave unit power source buttons, 22- microwave controllers, 23- flue gas cleaners,
24- wet wind casees, 25- heat exchangers, 26- dry-air blast casees, 27- heat-exchange systems, 28- motor, 29- little gears, 30- chains, 31-
Gear wheel.
Specific embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
The method of the microwave calcination uranium chemical concentrate, it is comprised the following steps that：
（1）During uranium chemical concentrate added into microwave calcination cavity with the inlet amount of 300kg/h first, microwave calcination is controlled
Speed of agitator is 20r/min in cavity, and it is 400 to then pass to high-temperature residual heat flue gas and temperature is preheated to cold uranium chemical concentrate
℃；Uranium chemical concentrate is ammonium diuranate（ADU）；High-temperature residual heat flue-gas temperature is 700 DEG C, and intake is 10m3/h；
（2）Uranium chemical concentrate after preheating is carried out into three section calcinings：First in first paragraph calcination process：With 80 DEG C/min
The rate of heat addition control microwave output power for 20kW, calcining heat is 840 DEG C, and calcination time is 5min；Then second segment is micro-
In ripple calcination process：Regulation microwave output power is 55kW, and calcining heat is 870 DEG C, and calcination time is 5min；Finally carry out
Three sections of microwave calcinations：Regulation microwave output power is 60kW, and calcining heat is 870 DEG C, and calcination time is 8min, after calcining
Material is cooled to room temperature and obtains triuranium octoxide product, and the high-temperature residual heat flue gas for producing in the process is purified, heat exchange
Preheating uranium chemical concentrate is re-used afterwards.
Uranium content reaches GB10268-88 standards in determining triuranium octoxide product through analysis, and to triuranium octoxide product
Middle uranium content is analyzed detection, wherein total uranium content is 84.76wt.%, U4+Content is 28.25wt.%.High-temperature residual heat flue gas is pre-
Heat makes using energy source save 20%.
As shown in figure 1, the device of the microwave calcination uranium chemical concentrate, the device is by microwave generating apparatus, auger
Device, microwave control device, temperature measuring equipment and flue gas recirculation cleaning system composition；
The microwave generating apparatus include bearing 17, the heating using microwave cavity 5 being fixed on bearing 17 and are evenly distributed on
Magnetron 6 on heating using microwave cavity 5；
The spiral agitator include reductor 1, helical axis shaft coupling 2, bearing 3, charge door 4, spiral conveying tube 8,
Helical axis 9, helical blade 11, flue gas volatilization mouth 13, discharging opening 16, motor 28, little gear 29, chain 30, gear wheel 31, spiral shell
Rotation transport tube 8 crosses heating using microwave cavity 5, and the side roof part of part one outside spiral conveying tube 8 and heating using microwave cavity 5 is provided with and adds
Material mouth 4, opposite side is provided with flue gas volatilization mouth 13, and the bottom of 13 underface spiral conveying tube of flue gas volatilization mouth 8 is provided with discharging opening 16, spiral shell
Helical axis 9 is crossed in rotation transport tube 8 bosom position, is uniformly distributed on helical axis 9, helical blade 11, and helical axis 9 is near charging
4 sides of mouth are sequentially connected bearing 3, helical axis shaft coupling 2, reductor 1, gear wheel 31, chain 30, little gear 29 and motor
28；
The microwave control device includes temperature indicator 19, microwave power controller 20, microwave unit power source button 21
With microwave controller 22, microwave controller 22 is provided with temperature indicator 19, microwave power controller 20, microwave unit power source button
21, temperature indicator 19 is connected with temperature measuring equipment, and microwave power controller 20 is connected with magnetron 6；
The temperature measuring equipment is inserted from the top surface of spiral conveying tube 8 inside heating using microwave cavity 5；
The flue gas recirculation cleaning system includes pipeline reducing diameter valve 14, flue 15, flue gas cleaner 23, wet wind case
24th, the heat-exchange system 27 and dry-air blast case 26 being made up of heat exchanger 25, flue gas volatilization mouth 13 pass through pipeline reducing diameter valve 14 successively
Connect with flue 15, flue gas cleaner 23, wet wind case 24, the heat-exchange system 27 and dry-air blast case 26 that are made up of heat exchanger 25
Connect, the outlet of dry-air blast case 26 is connected with the bottom of spiral conveying tube 8；Wherein temperature measuring equipment includes thermocouple temperature measurement instrument, thermocouple temperature measurement
Instrument a7, thermocouple temperature measurement instrument c12 are located at the both sides of heating using microwave cavity 5, and thermocouple temperature measurement instrument b10 is located at heating using microwave cavity 5
Centre position.
Embodiment 2
The method of the microwave calcination uranium chemical concentrate, it is comprised the following steps that：
（1）During uranium chemical concentrate added into microwave calcination cavity with the inlet amount of 100kg/h first, microwave calcination is controlled
Speed of agitator is 10r/min in cavity, and it is 300 to then pass to high-temperature residual heat flue gas and temperature is preheated to cold uranium chemical concentrate
℃；Uranium chemical concentrate is ammonium uranyl tricarbonate（AUC）；High-temperature residual heat flue-gas temperature is 600 DEG C, intake 1m3/h；
（2）Uranium chemical concentrate after preheating is carried out into three section calcinings：First in first paragraph calcination process：With 60 DEG C/min
The rate of heat addition control microwave output power for 25kW, calcining heat is 800 DEG C, and calcination time is 6min；Then second segment is micro-
In ripple calcination process：Regulation microwave output power is 25kW, and calcining heat is 850 DEG C, and calcination time is 3min；Finally carry out
Three sections of microwave calcinations：Regulation microwave output power is 35kW, and calcining heat is 900 DEG C, and calcination time is 6min, after calcining
Material is cooled to room temperature and obtains triuranium octoxide product, and the high-temperature residual heat flue gas for producing in the process is purified, heat exchange
Preheating uranium chemical concentrate is re-used afterwards.
Uranium content reaches GB10268-88 standards in determining triuranium octoxide product through analysis, and to triuranium octoxide product
Middle uranium content is analyzed detection, wherein total uranium content is 84.72wt.%, U4+Content is 28.21wt.%.High-temperature residual heat flue gas is pre-
Heat makes using energy source save 10%.
As shown in figure 1, the device of the microwave calcination uranium chemical concentrate, the device is by microwave generating apparatus, auger
Device, microwave control device, temperature measuring equipment and flue gas recirculation cleaning system composition；
The microwave generating apparatus include bearing 17, the heating using microwave cavity 5 being fixed on bearing 17 and are evenly distributed on
Magnetron 6 on heating using microwave cavity 5；
The spiral agitator include reductor 1, helical axis shaft coupling 2, bearing 3, charge door 4, spiral conveying tube 8,
Helical axis 9, helical blade 11, flue gas volatilization mouth 13, discharging opening 16, motor 28, little gear 29, chain 30, gear wheel 31, spiral shell
Rotation transport tube 8 crosses heating using microwave cavity 5, and the side roof part of part one outside spiral conveying tube 8 and heating using microwave cavity 5 is provided with and adds
Material mouth 4, opposite side is provided with flue gas volatilization mouth 13, and the bottom of 13 underface spiral conveying tube of flue gas volatilization mouth 8 is provided with discharging opening 16, spiral shell
Helical axis 9 is crossed in rotation transport tube 8 bosom position, is uniformly distributed on helical axis 9, helical blade 11, and helical axis 9 is near charging
4 sides of mouth are sequentially connected bearing 3, helical axis shaft coupling 2, reductor 1, gear wheel 31, chain 30, little gear 29 and motor
28；
The microwave control device includes temperature indicator 19, microwave power controller 20, microwave unit power source button 21
With microwave controller 22, microwave controller 22 is provided with temperature indicator 19, microwave power controller 20, microwave unit power source button
21, temperature indicator 19 is connected with temperature measuring equipment, and microwave power controller 20 is connected with magnetron 6；
The temperature measuring equipment is inserted from the top surface of spiral conveying tube 8 inside heating using microwave cavity 5；
The flue gas recirculation cleaning system includes pipeline reducing diameter valve 14, flue 15, flue gas cleaner 23, wet wind case
24th, the heat-exchange system 27 and dry-air blast case 26 being made up of heat exchanger 25, flue gas volatilization mouth 13 pass through pipeline reducing diameter valve 14 successively
Connect with flue 15, flue gas cleaner 23, wet wind case 24, the heat-exchange system 27 and dry-air blast case 26 that are made up of heat exchanger 25
Connect, the outlet of dry-air blast case 26 is connected with the bottom of spiral conveying tube 8；Wherein temperature measuring equipment includes thermocouple temperature measurement instrument, thermocouple temperature measurement
Instrument a7, thermocouple temperature measurement instrument c12 are located at the both sides of heating using microwave cavity 5, and thermocouple temperature measurement instrument b10 is located at heating using microwave cavity 5
Centre position.
Embodiment 3
The method of the microwave calcination uranium chemical concentrate, it is comprised the following steps that：
（1）During uranium chemical concentrate added into microwave calcination cavity with the inlet amount of 400kg/h first, microwave calcination is controlled
Speed of agitator is 30r/min in cavity, and it is 500 to then pass to high-temperature residual heat flue gas and temperature is preheated to cold uranium chemical concentrate
℃；Uranium chemical concentrate is ammonium uranyl tricarbonate（AUC）；High-temperature residual heat flue-gas temperature is 800 DEG C, intake 15m3/h；
（2）Uranium chemical concentrate after preheating is carried out into three section calcinings：First in first paragraph calcination process：With 100 DEG C/
The rate of heat addition of min controls microwave output power for 35kW, and calcining heat is 850 DEG C, and calcination time is 3min；Then second segment
During microwave calcination：Regulation microwave output power is 30kW, and calcining heat is 860 DEG C, and calcination time is 3min；Finally carry out
3rd section of microwave calcination：Regulation microwave output power is 50kW, and calcining heat is 890 DEG C, and calcination time is 4min, after calcining
Material be cooled to room temperature and obtain triuranium octoxide product, the high-temperature residual heat flue gas for producing in the process is purified, hot friendship
Preheating uranium chemical concentrate is re-used after changing.
Uranium content reaches GB10268-88 standards in determining triuranium octoxide product through analysis, and to triuranium octoxide product
Middle uranium content is analyzed detection, wherein total uranium content is 84.80wt.%, U4+Content is 28.27wt.%.High-temperature residual heat flue gas is pre-
Heat makes using energy source save 30%.
As shown in figure 1, the device of the microwave calcination uranium chemical concentrate, the device is by microwave generating apparatus, auger
Device, microwave control device, temperature measuring equipment and flue gas recirculation cleaning system composition；
The microwave generating apparatus include bearing 17, the heating using microwave cavity 5 being fixed on bearing 17 and are evenly distributed on
Magnetron 6 on heating using microwave cavity 5；
The spiral agitator include reductor 1, helical axis shaft coupling 2, bearing 3, charge door 4, spiral conveying tube 8,
Helical axis 9, helical blade 11, flue gas volatilization mouth 13, discharging opening 16, motor 28, little gear 29, chain 30, gear wheel 31, spiral shell
Rotation transport tube 8 crosses heating using microwave cavity 5, and the side roof part of part one outside spiral conveying tube 8 and heating using microwave cavity 5 is provided with and adds
Material mouth 4, opposite side is provided with flue gas volatilization mouth 13, and the bottom of 13 underface spiral conveying tube of flue gas volatilization mouth 8 is provided with discharging opening 16, spiral shell
Helical axis 9 is crossed in rotation transport tube 8 bosom position, is uniformly distributed on helical axis 9, helical blade 11, and helical axis 9 is near charging
4 sides of mouth are sequentially connected bearing 3, helical axis shaft coupling 2, reductor 1, gear wheel 31, chain 30, little gear 29 and motor
28；
The microwave control device includes temperature indicator 19, microwave power controller 20, microwave unit power source button 21
With microwave controller 22, microwave controller 22 is provided with temperature indicator 19, microwave power controller 20, microwave unit power source button
21, temperature indicator 19 is connected with temperature measuring equipment, and microwave power controller 20 is connected with magnetron 6；
The temperature measuring equipment is inserted from the top surface of spiral conveying tube 8 inside heating using microwave cavity 5；
The flue gas recirculation cleaning system includes pipeline reducing diameter valve 14, flue 15, flue gas cleaner 23, wet wind case
24th, the heat-exchange system 27 and dry-air blast case 26 being made up of heat exchanger 25, flue gas volatilization mouth 13 pass through pipeline reducing diameter valve 14 successively
Connect with flue 15, flue gas cleaner 23, wet wind case 24, the heat-exchange system 27 and dry-air blast case 26 that are made up of heat exchanger 25
Connect, the outlet of dry-air blast case 26 is connected with the bottom of spiral conveying tube 8；Wherein temperature measuring equipment includes thermocouple temperature measurement instrument, thermocouple temperature measurement
Instrument a7, thermocouple temperature measurement instrument c12 are located at the both sides of heating using microwave cavity 5, and thermocouple temperature measurement instrument b10 is located at heating using microwave cavity 5
Centre position.
Specific embodiment of the invention is explained in detail above in association with accompanying drawing, but the present invention be not limited to it is above-mentioned
Implementation method, in the ken that those of ordinary skill in the art possess, can also be before present inventive concept not be departed from
Put that various changes can be made.
Claims (4)
1. a kind of method of microwave calcination uranium chemical concentrate, it is characterised in that comprise the following steps that：
（1）During uranium chemical concentrate added into microwave calcination cavity with the inlet amount of 100 ~ 400kg/h first, microwave calcination is controlled
Speed of agitator is 10 ~ 30r/min in cavity, then pass to high-temperature residual heat flue gas temperature be preheated to cold uranium chemical concentrate be
300~500℃；
（2）Uranium chemical concentrate after preheating is carried out into three section calcinings：First in first paragraph calcination process：Control microwave output work
Rate is 20 ~ 35kW, and calcining heat is 800 ~ 850 DEG C, and calcination time is 3 ~ 6min；Then during second segment microwave calcination：Adjust
Section microwave output power is 25 ~ 55kW, and calcining heat is 850 ~ 870 DEG C, and calcination time is 3 ~ 6min；Finally carry out the 3rd section it is micro-
Ripple is calcined：Regulation microwave output power is 35 ~ 60kW, and calcining heat is 870 ~ 900 DEG C, and calcination time is 4 ~ 8min, through calcining
Material afterwards is cooled to room temperature and obtains triuranium octoxide product, and the high-temperature residual heat flue gas for producing in the process is purified, heat
Preheating uranium chemical concentrate is re-used after exchange；
The step（1）Middle uranium chemical concentrate is ammonium diuranate or ammonium uranyl tricarbonate.
2. the method for microwave calcination uranium chemical concentrate according to claim 1, it is characterised in that：The step（1）In
High-temperature residual heat flue-gas temperature is 600 ~ 800 DEG C, and intake is 1 ~ 15m3/h。
3. it is a kind of complete claim 1 described in microwave calcination uranium chemical concentrate method device, it is characterised in that：The device
It is made up of microwave generating apparatus, spiral agitator, microwave control device, temperature measuring equipment and flue gas recirculation cleaning system；
The microwave generating apparatus include bearing（17）, be fixed on bearing（17）On heating using microwave cavity（5）Be uniformly distributed
In heating using microwave cavity（5）On magnetron（6）；
The spiral agitator includes reductor（1）, helical axis shaft coupling（2）, bearing（3）, charge door（4）, helical feed
Cylinder（8）, helical axis（9）, helical blade（11）, flue gas volatilization mouth（13）, discharging opening（16）, motor（28）, little gear（29）、
Chain（30）, gear wheel（31）, spiral conveying tube（8）Cross heating using microwave cavity（5）, spiral conveying tube（8）With heating using microwave
Cavity（5）The outer side roof part of part one is provided with charge door（4）, opposite side be provided with flue gas volatilization mouth（13）, flue gas volatilization mouth
（13）Underface spiral conveying tube（8）Bottom is provided with discharging opening（16）, spiral conveying tube（8）Cross helical axis in bosom position
（9）, helical axis（9）On be uniformly distributed helical blade（11）, helical axis（9）Near charge door（4）Side is sequentially connected bearing
（3）, helical axis shaft coupling（2）, reductor（1）, gear wheel（31）, chain（30）, little gear（29）And motor（28）；
The microwave control device includes temperature indicator（19）, microwave power controller（20）, microwave unit power source button
（21）And microwave controller（22）, microwave controller（22）It is provided with temperature indicator（19）, microwave power controller（20）, microwave
Installation's power source button（21）, temperature indicator（19）It is connected with temperature measuring equipment, microwave power controller（20）With magnetron（6）Even
Connect；
The temperature measuring equipment is from positioned at heating using microwave cavity（5）Internal spiral conveying tube（8）Top surface is inserted；
The flue gas recirculation cleaning system includes pipeline reducing diameter valve（14）, flue（15）, flue gas cleaner（23）, wet wind case
（24）, by heat exchanger（25）The heat-exchange system of composition（27）With dry-air blast case（26）, flue gas volatilization mouth（13）Become by pipeline
Footpath valve（14）Successively with flue（15）, flue gas cleaner（23）, wet wind case（24）, by heat exchanger（25）The heat friendship of composition
Change system（27）With dry-air blast case（26）Connection, dry-air blast case（26）Outlet and spiral conveying tube（8）Bottom connects.
4. the device of microwave calcination uranium chemical concentrate according to claim 3, it is characterised in that：The temperature measuring equipment bag
Include thermocouple temperature measurement instrument, thermocouple temperature measurement instrument a（7）, thermocouple temperature measurement instrument c（12）Positioned at heating using microwave cavity（5）Both sides, heat
Galvanic couple temperature measurer b（10）Positioned at heating using microwave cavity（5）Centre position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258359.3A CN104894401B (en) | 2015-05-20 | 2015-05-20 | A kind of method and apparatus of microwave calcination uranium chemical concentrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258359.3A CN104894401B (en) | 2015-05-20 | 2015-05-20 | A kind of method and apparatus of microwave calcination uranium chemical concentrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104894401A CN104894401A (en) | 2015-09-09 |
| CN104894401B true CN104894401B (en) | 2017-05-31 |
Family
ID=54027351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510258359.3A Active CN104894401B (en) | 2015-05-20 | 2015-05-20 | A kind of method and apparatus of microwave calcination uranium chemical concentrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104894401B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108585015A (en) * | 2018-06-19 | 2018-09-28 | 四川江铜稀土有限责任公司 | A kind of method that microwave calcination prepares lanthana |
| CN112607819A (en) * | 2020-12-18 | 2021-04-06 | 杭州景业智能科技股份有限公司 | Nuclear industry high-level radioactive waste liquid evaporation-calcination system and evaporation-calcination method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628737A (en) * | 2009-08-17 | 2010-01-20 | 昆明理工大学 | Method for producing triuranium octoxide by calcining ammonium uranyl tricarbonate with microwaves |
| CN101633521B (en) * | 2009-08-17 | 2011-10-26 | 昆明理工大学 | Method for producing triuranium octoxide by microwave calcination of ammonium diuranate |
| CN204676136U (en) * | 2015-05-20 | 2015-09-30 | 昆明理工大学 | A kind of device of microwave calcination uranium chemical concentrate |
-
2015
- 2015-05-20 CN CN201510258359.3A patent/CN104894401B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104894401A (en) | 2015-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105331810B (en) | Microwave heating equipment and method for vanadium in sulfuric acid leaching bone coal | |
| CN210486365U (en) | System for drying iron phosphate by using waste heat of roasting furnace | |
| CN104894401B (en) | A kind of method and apparatus of microwave calcination uranium chemical concentrate | |
| CN102778117B (en) | Drying device and design method | |
| CN204676136U (en) | A kind of device of microwave calcination uranium chemical concentrate | |
| CN103011289A (en) | Continuous device for preparing vanadium pentoxide from ammonium metavanadate | |
| CN102534200A (en) | Method using microwave sintering to extract molybdenum in nickel molybdenum ore | |
| CN107146908A (en) | A kind of li-ion electrode materials carbon coating continuous apparatus | |
| CN203173850U (en) | Deaminization furnace for preparing vanadium pentoxide from ammonium vanadate | |
| CN111704345A (en) | Pig manure drying equipment with waste heat recovery device | |
| CN206432342U (en) | A kind of li-ion electrode materials carbon coating continuous apparatus | |
| CN201411379Y (en) | Oxidation roasting furnace for vanadic oxide | |
| CN206325553U (en) | A kind of agitating device of li-ion electrode materials carbon encapsulated material | |
| CN205717385U (en) | A kind of rotary microwave stove | |
| CN103468931B (en) | A kind of microwave calcining equipment | |
| CN204265461U (en) | A kind of device preparing Sodium chromate for chrome ore oxidation | |
| CN202719854U (en) | Drying equipment | |
| CN105347324B (en) | Protection production line for continuous lithium iron phosphate high-temperature calcination atmosphere | |
| CN205061853U (en) | Pipe chain serialization mud fatlute carbonization system | |
| CN209254611U (en) | A kind of heating equipment for Chemical Manufacture | |
| CN112460985A (en) | Carbon rotary kiln and manufacturing process thereof | |
| CN202420127U (en) | Microwave-steam hybrid heated roller drying kiln | |
| CN205448669U (en) | Laterite nickel ore microwave low -temperature smelting device | |
| CN220216637U (en) | Foundry sand roasting device | |
| CN206152777U (en) | Likepowder vanadic anhydride's of oxidation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |