CN110317946A - A kind of apparatus and method of microwave fluosolids roasting zincblende - Google Patents
A kind of apparatus and method of microwave fluosolids roasting zincblende Download PDFInfo
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- CN110317946A CN110317946A CN201910307101.6A CN201910307101A CN110317946A CN 110317946 A CN110317946 A CN 110317946A CN 201910307101 A CN201910307101 A CN 201910307101A CN 110317946 A CN110317946 A CN 110317946A
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- 229910052984 zinc sulfide Inorganic materials 0.000 title claims abstract description 93
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 230000008016 vaporization Effects 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 238000001354 calcination Methods 0.000 claims abstract description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 21
- 229910052725 zinc Inorganic materials 0.000 claims description 21
- 239000011701 zinc Substances 0.000 claims description 21
- 238000005243 fluidization Methods 0.000 claims description 13
- 230000001590 oxidative effect Effects 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 210000003205 muscle Anatomy 0.000 claims 1
- 230000035484 reaction time Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- 239000011819 refractory material Substances 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 14
- 239000011707 mineral Substances 0.000 abstract description 14
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000010494 dissociation reaction Methods 0.000 abstract description 2
- 230000005593 dissociations Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 239000003708 ampul Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000009854 hydrometallurgy Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 238000009853 pyrometallurgy Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 238000009858 zinc metallurgy Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/10—Roasting processes in fluidised form
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/02—Preliminary treatment of ores; Preliminary refining of zinc oxide
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The present invention relates to a kind of apparatus and method of microwave fluosolids roasting zincblende, belong to non-ferrous metal smelting technology.The device includes screw-feeder, microwave heating power controller, magnetron, heat insulation wall, flow controller, protective gas storage tank, oxygen-enriched air storage tank, gas distribution grid, material collector, discharge port valve, Vaporizing cooling heat exhausting pipe, microwave oven cavity, exhaust outlet, device for recovering powder, thermocouple, temperature measurer, microwave catheter, feed hopper.A kind of method of microwave fluosolids roasting zincblende, steps are as follows: (1) continuously feeding zincblende in microwave oven cavity；(2) it is passed through gas into cavity, zincblende is made to be in fluidized state；(3) microwave is opened, microwave power size is adjusted；(4) after zincblende temperature reaches reaction temperature, calcination is carried out；(5) it is down to room temperature after reaction, obtains calcining.Apparatus of the present invention are easy to operate, and degree of dissociation of mineral monomer is high, and material is not sintered.
Description
Technical field
The present invention relates to a kind of apparatus and method of microwave fluosolids roasting zincblende, belong to non-ferrous metal metallurgy technology neck
Domain.
Background technique
The smelting process of modern zinc can be divided into two major classes, i.e. pyrometallurgy of zinc and zinc hydrometallurgy.Pyrometallurgy of zinc and zinc hydrometallurgy
First zincblende will be roasted.Conventional oxidation roasts experimental facilities maintenance and expends big and maintenance of equipment duration；Roasted ore
Article position is low；SO in flue gas2Concentration it is low.The roaster that domestic zinc metallurgy enterprise uses is based on Lu Qishi fluidized bed furnace, boiling roasting
The problems such as burning is there are dust rate high (up to 80-90%), energy consumption is high, pollution environment.The heat utilization of reverberatory furnace roasting technique reverberatory furnace
Rate is not high, large labor intensity, working condition is poor, energy consumption is high.Conventional fluosolids roasting is needed in the low ore of roasting sulfur-bearing
The fuel such as addition coal are not easy low-temperature bake.Traditional roasting technique is since material is opposing stationary motionless, external material and ambient enviroment
While carrying out heat exchange, material internal energy is excessively high cannot to be transferred out in time, therefore, frequently result in materials inside sintering and
The complete phenomenon of periphery material unreacted.The present invention uses microwave fluosolids roasting, solves the existing roasting of traditional roasting technique
Burn non-uniform problem.In addition, microwave fluosolids roasting is easy to operate, low energy consumption, high production efficiency, environmental-friendly, product product
Position is high.
Zincblende dielectric constant with higher, therefore use microwave heating heating rate is fast, heating efficiency is high.By micro-
Energy dissipation of the wave inside material directly heats material.Since microwave is capable of the heating valuable mineral of selectivity without heating
Gangue mineral, therefore the higher valuable mineral of material medium dielectric constant microwave medium such as sulphide ore and oxide ore can be heated within a short period of time
To high temperature.There is very big difference in the microwave absorbing property of valuable mineral and gangue mineral, so that in the generation of mineral faying face
Stress forms gap extension between crackle and crack or crystal and broadens, and promotes mineral monomer dissociation, is conducive to subsequent wet leaching
Liquid-solid reaction is reinforced in the infiltration of leaching agent in the process, so that extraction time greatly shortens, leaching rate is high.Fluidized reaction is a kind of
Solid particle is set to be in suspended motion state by solid particle using gas or liquid, promoting the circulation of qi solid phase reaction of going forward side by side or liquid are solid
The process of phase reaction.Fluosolids roasting has that energy saving, reaction speed is fast, pollution level is low, equipment is simple, easy to operate etc.
Advantage.
Patent publication No. is that CN201463542U discloses a kind of discontinuous microwave fluidized-bed roasting device, and microwave cavity is solid
Fixed quartz ampoule is located in microwave cavity, quartz ampoule top and bottom fixing seal on the support frame, and roof of the furnace is equipped with charging
Mouth, smoke outlet, thermocouple, burner hearth bottom are connected to microwave cavity, and air compartment is connected to hot-blast stove and connect with brackets with height-adjustable,
And can synchronize and move up and down with the interconnecting piece of bracket, gas distribution grid is between quartz ampoule pedestal and air compartment.The equipment uses
Microwave fluidized-bed roasting, the auxiliary fuels such as additive-free, combustion adjuvant are applied widely, energy saving.But the equipment is not set out
Therefore material mouth after the completion of roasting, closes the connection of microwave Hou Yaoxianxie lower air chamber and fixed feet, then adjusts height adjustable supporting
Frame releases burned material, cumbersome.
Microwave fluosolids roasting has the following characteristics that (1) selectively heating, heating efficiency compared with traditional baking modes
Height, heating rate are fast, globality heats；(2) cleanliness without any pollution, efficient low-consume；(3) simple process, it is easy to operate, with open with
Stop；(4) fluosolids roasting solves the problems, such as that roasting present in roasting process is non-uniform；(5) microwave heating is used, solves to pass
When the system roasting low ore of sulfur-bearing, needs to add the fuel such as coal, is not easy the problem of low-temperature bake.
The zincblende that the present invention uses is black powder solid, and wherein sulfur content is higher, and it is more difficult to be subsequently generated product,
Have great importance so removing sulfur content therein while generating zinc oxide to subsequent zinc series of products.
Summary of the invention
The device of microwave fluosolids roasting zincblende of the present invention includes screw-feeder (1), microwave heating power controller
(2), magnetron (3), heat insulation wall (4), flow controller (5), protective gas storage tank (6), oxygen-enriched air storage tank (7),
Flow controller (8), gas distribution grid (9), material collector (10), discharge port valve (11), Vaporizing cooling heat exhausting pipe (12),
Microwave oven cavity (13), exhaust outlet (14), device for recovering powder (15), thermocouple (16), temperature measurer (17), microwave catheter
(18), feed hopper (19).Wherein, the microwave frequency for fluidizing state microwave calcining device is 2450MHz, and feed hopper (19) connects spiral
Feeder (1), screw-feeder (1) is interior auger leaf, can continuously feed material in microwave oven cavity (13).Micro-wave oven
Cavity (13) is externally provided with insulating brick (4), and for maintaining cavity inner temperature, gas storage tanks pass through the through-hole of pipeline and bottom of device
Connection, gas pass through gas distribution grid (9) and enter microwave fluidisation cavity (13), and device side connects Vaporizing cooling heat exhausting pipe
(12), for waste heat to be discharged, magnetron (3) is connected by conducting wire with microwave heating power controller (2), for adjusting in real time
Save microwave power, thermocouple (16) is connect by conducting wire with digital display temperature measurer (17), can real-time display zincblende temperature, microwave
Conduit (18) imports microwave in reaction cavity, is equipped with exhaust outlet (14) at the top of microwave cavity, and flue gas passes through through exhaust outlet (14)
Pipeline enters device for recovering powder (15), and microwave fluidizes cavity (13) bottom connecting valve and discharge port (11), and control valve is opened
Close controllable material discharging speed and time.
The device of the microwave fluosolids roasting zincblende, it is characterised in that: the material of fluidized reaction cavity is can be complete
The material of microwave reflection, such as stainless steel.
The device of the microwave fluosolids roasting zincblende, it is characterised in that: the microwave oven cavity two sides are equipped with equal
Even magnetron (can set 1 ~ 8), the power of every magnetron are 1.5 kW, and totally 12 kW, the microwave that magnetron issues pass through micro-
Waveguide imports reaction cavity.
The device of the microwave fluosolids roasting zincblende, it is characterised in that: heat insulation wall is the guarantor made of alumina silicate
Adiabator, heat insulation wall inner surface are poured with wave transparent castable refractory.
Microwave fluosolids roasting zincblende device of the present invention can lead to similar to protective gas such as nitrogen, argon gas.
The device of the microwave fluosolids roasting zincblende, it is characterised in that: gas distribution grid is by mica sheet or high-purity
Quartz is made.
The device of the microwave fluosolids roasting zincblende, it is characterised in that: the effective heat-resistant and wear-resistant material of cooling thermal discharge
Manufacture.
The device of the microwave fluosolids roasting zincblende, it is characterised in that: the temperature-measuring range of thermocouple is 0 ~ 1400
℃。
A kind of method of microwave fluosolids roasting zincblende sequentially includes the following steps:
1, by low-grade zincblende it is broken and it is levigate zinc ore powder is made, then by feed hopper addition screw-feeder, in spiral
It is continuously fed in microwave oven cavity under the action of paddle；
2, the valve of oxidizing gas storage tank is opened, adjusting gas flow controller is passed through oxidisability gas into reaction cavity
Body is discharged through exhaust outlet, and zincblende is made to be in fluidized state；
3, power supply is opened, magnetron issues microwave, adjusts microwave power size by microwave heating power controller, microwave passes through
Waveguide is passed to microwave and fluidizes cavity, heats zincblende, passes through thermocouple real-time monitoring zincblende temperature；
4, after zincblende temperature rises to reaction temperature, the temperature and time of setting is kept in resonant cavity, carries out fluidisation roasting
Burn reaction；
5, stop being passed through oxidizing gas after reaction, close microwave, be down to room temperature to zincblende, open discharge gate valve,
Material discharge, obtains zinc calcine.
The method of the microwave fluosolids roasting zincblende, it is characterised in that: in above-mentioned steps 1, grind broken
It is 80 ~ 200 mesh is by weight 90% or more that zincblende, which takes particle size range, and the grade of zincblende is 20 ~ 60%.
The method of the microwave fluosolids roasting zincblende, it is characterised in that: in above-mentioned steps 2, oxidizing gas is
The oxygen-enriched air that oxygen content is 25% ~ 28%.
The method of the microwave fluosolids roasting zincblende, it is characterised in that: in above-mentioned steps 2, control gas flow
For 1 ~ 1.5m3/h。
The method of the microwave fluosolids roasting zincblende, it is characterised in that: in above-mentioned steps 2, be discharged through exhaust outlet
Gas can be recycled the relieving haperacidity of Hou Song sulfuric acid plant.
The method of the microwave fluosolids roasting zincblende, it is characterised in that: in above-mentioned steps 3, microwave power be 0 ~
12 kW, microwave frequency are 915 MHz or 2450MHz.
The method of the microwave fluosolids roasting zincblende, it is characterised in that: in above-mentioned steps 4, heating rate be 30 ~
100℃/min。
The method of the microwave fluosolids roasting zincblende, it is characterised in that: in above-mentioned steps 4, microwave fluidization roasting
The temperature for burning zincblende is 800 ~ 1100 DEG C, and soaking time is 3 ~ 20min.
The present invention is described next in more detail.
In the present invention, if material size is less than 80 mesh, material particles are bigger than normal, and excessive particle, which is added, to be sunk to the bottom
Phenomenon blocks blast cap, is unfavorable for zincblende fluosolids roasting, keeps roasting uneven；If material size is greater than 200 mesh, material
Particle is less than normal, and fluidisation acutely, can be such that zincblende is diffused into instrument device, damages instrument.Therefore zincblende granularity is in 80 ~ 200 mesh
It is reasonable.
The zincblende is from the top of microwave fluidized reaction cavity into lower part goes out, and passes through quilt when microwave fluidized reaction cavity
Microwave heating oxidation roasting.
The air mass flow of the microwave fluosolids roasting zincblende is 1.0 ~ 1.5 m3/h.Increase air velocity, air-flow
Turbulence level increases, and is conducive to gas diffusion.Air velocity is too low, and zincblende cannot become fluidisation state well.Gas velocity is spent
Height can then make zincblende fluidisation acutely, be unfavorable for zincblende roasting.
The fluosolids roasting zincblende increases the concentration of oxygen in air-flow, is conducive to O2It spreads, adds to ZnS particle surface
Fast oxidation reaction.
The soaking time of the fluosolids roasting zincblende will lead to material not if soaking time is less than 3min
Fully reacting.If soaking time is greater than 20min, material fully reacting already, the excessive time will cause unnecessary energy
Amount loss.Therefore, the Best Times of microwave fluosolids roasting zincblende are 3 ~ 20min.
The beneficial effects of the present invention are:
1, this method prepares zinc oxide using microwave roasting direct zincblende, and process flow is short, easy to operate, occupation area of equipment
Poisonous and harmful substance pollution environment will not be generated in small, heating process；
2, microwave has unique " body heating " property, heats heat transfer not instead of not from outward appearance to inner essence, with according to microwave in mineral
Internal energy dissipation directly heats mineral, makes material entirety thermally equivalent, does not generate temperature gradient；
3, selective heated material, heating efficiency is high, and heating rate is fast.When with microwave irradiation mineral because ore composition at
Point not identical, chemical property is also just different, so the also just different therefore different mineral of the heating rate in microwave field
Different temperature can be heated to.Most valuable minerals are heated to the microwave property of can choose, do not heat gangue mineral, thus
Energy consumption save the cost can be reduced.
Detailed description of the invention
Figure one is the apparatus structure schematic diagram of microwave fluosolids roasting zincblende of the present invention.
In Fig. 1: 1, screw-feeder, 2, microwave heating power controller, 3, magnetron, 4, heat insulation wall, 5, flow control
Device processed, 6, protective gas storage tank, 7, oxygen-enriched air storage tank, 8, flow controller, 9, gas distribution grid, 10, material receipts
Storage, 11, discharge port valve, 12, Vaporizing cooling heat exhausting pipe, 13, microwave oven cavity, 14, exhaust outlet, 15, device for recovering powder,
16, thermocouple, 17, temperature measurer, 18, microwave catheter, 19, feed hopper.
Fig. 2 is the partial schematic diagram of the gas distribution grid in the fluidized-bed reactor in Fig. 1.
Specific embodiment
Below with reference to specific embodiment, the invention will be further described.
Embodiment 1
The device of microwave fluosolids roasting zincblende of the present invention is as shown in Figure 1, include screw-feeder (1), microwave heating power
Controller (2), magnetron (3), heat insulation wall (4), flow controller (5), protective gas storage tank (6), oxygen-enriched air storage
Tank (7), flow controller (8), gas distribution grid (9), material collector (10), discharge port valve (11), Vaporizing cooling heat extraction
Manage (12), microwave oven cavity (13), exhaust outlet (14), device for recovering powder (15), thermocouple (16), temperature measurer (17), microwave
Conduit (18), feed hopper (19).Wherein, the microwave frequency for fluidizing state microwave calcining device is 2450MHz, feed hopper (19) connection
Screw-feeder (1), screw-feeder (1) is interior auger leaf, can continuously feed material in microwave oven cavity (13).It is micro-
Wave furnace cavity (13) is externally provided with insulating brick (4), and for maintaining cavity inner temperature, gas storage tanks pass through pipeline and bottom of device
Through-hole connection, gas pass through gas distribution grid (9) and enter microwave fluidisation cavity (13), and device side connects Vaporizing cooling heat exhausting pipe
(12), for waste heat to be discharged, magnetron (3) is connected by conducting wire with microwave heating power controller (2), for adjusting in real time
Save microwave power, thermocouple (16) is connect by conducting wire with digital display temperature measurer (17), can real-time display zincblende temperature, microwave
Conduit (18) imports microwave in reaction cavity, is equipped with exhaust outlet (14) at the top of microwave cavity, and flue gas passes through through exhaust outlet (14)
Pipeline enters device for recovering powder (15), and microwave fluidizes cavity (13) bottom connecting valve and discharge port (11), and control valve is opened
Close controllable material discharging speed and time.
The device of the microwave fluosolids roasting zincblende, it is characterised in that: the reaction unit upper end offers
It is connected to the feed inlet of screw-feeder, has auger leaf in screw-feeder, material can continuously be fed in microwave oven cavity.
The device of the microwave fluosolids roasting zincblende, it is characterised in that: the reactor is equipped with and protrudes into reaction chamber
Thermocouple, thermocouple by conducting wire connect digital display temperature measurer, can real-time monitoring zincblende temperature.
The device of the microwave fluosolids roasting zincblende, it is characterised in that: the microwave oven cavity is externally provided with uniformly
Magnetron, microwave power be 0 ~ 12 kW, be continuously adjusted.
Complicated low-grade zincblende is crushed to the part that partial size is 100 mesh and accounts for the 80% of gross mass, zinc ore powder is made, it will
Zinc ore powder is continuously fed in microwave fluidization cavity by feed inlet by screw-feeder.
The valve for opening oxidizing gas storage tank, 26% oxygen-enriched air, adjusting gas flow are passed through into reaction cavity
Controller, by air flow control in 1m3/ h, is discharged through exhaust outlet, and zincblende is made to be in fluidized state.
Power supply is opened, magnetron issues microwave, and adjusting microwave power by microwave heating power controller is 6 kW, microwave
Frequency is 2450MHz, and microwave is passed to microwave by waveguide and fluidizes cavity, heats zincblende, dodges zinc by thermocouple real-time monitoring
Mine temperature.
Control heating rate is 60 DEG C/min, after zincblende temperature rises to 900 DEG C, the fluosolids roasting in resonant cavity
3min。
Stop being passed through oxidizing gas after reaction, close microwave, is down to room temperature to zincblende, opens discharge gate valve
Door, material discharge obtain zinc calcine, and the desulfurization degree of zincblende roasting is up to 85% or more.
Embodiment 2
Apparatus structure is the same as embodiment 1.
Complicated low-grade zincblende is crushed to the part that partial size is 150 mesh and accounts for the 80% of gross mass, zinc ore powder is made, it will
Zinc ore powder is continuously fed in microwave fluidization cavity by feed inlet by screw-feeder.
The valve for opening oxidizing gas storage tank, 27% oxygen-enriched air, adjusting gas flow are passed through into reaction cavity
Controller, by air flow control in 1.2m3/ h, is discharged through exhaust outlet, and zincblende is made to be in fluidized state.
Power supply is opened, magnetron issues microwave, and adjusting microwave power by microwave heating power controller is 9kW, microwave
Frequency is 2450MHz, and microwave is passed to microwave by waveguide and fluidizes cavity, heats zincblende, dodges zinc by thermocouple real-time monitoring
Mine temperature.
Control heating rate is 80 DEG C/min, after zincblende temperature rises to 1000 DEG C, the fluosolids roasting in resonant cavity
10min。
Stop being passed through oxidizing gas after reaction, close microwave, is down to room temperature to zincblende, opens discharge gate valve
Door, material discharge obtain zinc calcine, and the desulfurization degree of zincblende roasting is up to 90% or more.
Embodiment 3
Apparatus structure is the same as embodiment 1.
Complicated low-grade zincblende is crushed to the part that partial size is 200 mesh and accounts for the 80% of gross mass, zinc ore powder is made, it will
Zinc ore powder is continuously fed in microwave fluidization cavity by feed inlet by screw-feeder.
The valve for opening oxidizing gas storage tank, 28% oxygen-enriched air, adjusting gas flow are passed through into reaction cavity
Controller, by air flow control in 1.5m3/ h, is discharged through exhaust outlet, and zincblende is made to be in fluidized state.
Power supply is opened, magnetron issues microwave, and adjusting microwave power by microwave heating power controller is 9 kW, microwave
Frequency is 2450MHz, and microwave is passed to microwave by waveguide and fluidizes cavity, heats zincblende, dodges zinc by thermocouple real-time monitoring
Mine temperature.
It is rapidly heated from room temperature with 60 DEG C/min rate to 1100 DEG C, after reaching microwave heating temperature, keeps the temperature 20min.
Stop being passed through oxidizing gas after reaction, close microwave, is down to room temperature to zincblende, opens discharge gate valve
Door, material discharge obtain zinc calcine, and the desulfurization degree of zincblende roasting is up to 90% or more.
Claims (13)
1. a kind of apparatus and method of microwave fluosolids roasting zincblende, it is characterised in that specific step is as follows:
The device of the microwave fluosolids roasting zincblende include screw-feeder (1), microwave heating power controller (2),
Magnetron (3), heat insulation wall (4), flow controller (5), protective gas storage tank (6), oxygen-enriched air storage tank (7), flow
Controller (8), gas distribution grid (9), material collector (10), discharge port valve (11), Vaporizing cooling heat exhausting pipe (12), microwave
Furnace cavity (13), exhaust outlet (14), device for recovering powder (15), thermocouple (16), temperature measurer (17), microwave catheter (18), into
Hopper (19).Wherein, the microwave frequency for fluidizing state microwave calcining device is 2450MHz, and feed hopper (19) connects screw-feeder
(1), there is auger leaf in screw-feeder (1), material can continuously be fed in microwave oven cavity (13).Microwave oven cavity
(13) insulating brick (4) are externally provided with, for maintaining cavity inner temperature, gas storage tanks are connected by pipeline and the through-hole of bottom of device
It connecing, gas passes through gas distribution grid (9) and enters microwave fluidisation cavity (13), and device side connects Vaporizing cooling heat exhausting pipe (12),
For waste heat to be discharged, magnetron (3) is connected by conducting wire with microwave heating power controller (2), micro- for adjusting in real time
Wave power, thermocouple (16) are connect by conducting wire with digital display temperature measurer (17), can real-time display zincblende temperature, microwave catheter
(18) microwave is imported in reaction cavity, is equipped with exhaust outlet (14) at the top of microwave cavity, flue gas passes through pipeline through exhaust outlet (14)
Into device for recovering powder (15), microwave fluidizes cavity (13) bottom connecting valve and discharge port (11), and control valve switch can
Control material discharging speed and time.
2. the device of microwave fluosolids roasting zincblende according to claim 1, it is characterised in that: the reaction unit
Upper end offers the feed inlet of connection screw-feeder, has auger leaf in screw-feeder, can continuously give material in a subtle way
In wave furnace cavity.
3. the device of microwave fluosolids roasting zincblende according to claim 1, it is characterised in that: the reactor is equipped with
The thermocouple of reaction chamber is protruded into, thermocouple connects digital display temperature measurer by conducting wire, can real-time monitoring zincblende temperature.
4. the device of microwave fluosolids roasting zincblende according to claim 1, it is characterised in that: the microwave oven cavity
It is externally provided with evenly arranged magnetron, microwave power is 0 ~ 12 kW, and microwave frequency is 915 or 2450MHz.
5. the device of microwave fluosolids roasting zincblende according to claim 1, it is characterised in that: gas distribution grid is by wind
Cap, card and fire resisting liner are constituted.Distribution grid uses grating type dispersion plate structure, and 1 ~ 2m is made2Bulk, for spell
Dress.
6. the device of microwave fluosolids roasting zincblende according to claim 1, it is characterised in that: gas distribution grid upper berth
There is one layer of refractory material.Air-flow makes material be in fluidized state by the eyelet on gas distribution grid, into microwave fluidisation cavity.
7. microwave fluosolids roasting zincblende fluidization furnace wall of the present invention is equipped with 4 ~ 8 groups of Vaporizing cooling rows in insertion fluidized-bed
Heat pipe, which has drained heat, and recovery waste heat as a vapor.
8. a kind of method of microwave fluosolids roasting zincblende sequentially includes the following steps: (1) first for the sudden strain of a muscle zinc after crushing grinding
Screw-feeder is added by feed hopper in mine, continuously feeds in microwave oven cavity under the action of auger leaf；(2) Xiang Fanying
It is passed through oxidizing gas in cavity, zincblende is made to be in fluidized state；(3) microwave is opened, microwave heating power controller is passed through
Adjust microwave power size；(4) after zincblende temperature rises to reaction temperature, the temperature (800 of setting is kept in resonant cavity
~ 1100 DEG C) and the time (3min-20min), carry out fluosolids roasting reaction；(5) it is down to room temperature after reaction, opens discharge gate
Valve, material discharge, obtains zinc calcine.
9. the method for microwave fluosolids roasting zincblende according to claim 8, it is characterised in that: in the step (1)
The granularity of zincblende after grinding is 80 ~ 200 mesh.
10. the method for microwave fluosolids roasting zincblende according to claim 8, it is characterised in that: in the step (2)
Oxygen-enriched air uses 25% ~ 28%O2。
11. the method for microwave fluosolids roasting zincblende according to claim 8, it is characterised in that: in the step (2)
The air mass flow of fluosolids roasting is 1.0 ~ 1.5m3/h。
12. the method for microwave fluosolids roasting zincblende according to claim 8, it is characterised in that: in the step (3)
Microwave frequency is 915 MHz or 2450MHz.
13. the method for microwave fluosolids roasting zincblende according to claim 8, it is characterised in that: in the step (4)
The temperature of microwave fluosolids roasting is 800 ~ 1100 DEG C, and the reaction time is 3 ~ 20min.
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| CN111855902A (en) * | 2020-06-28 | 2020-10-30 | 北京科技大学 | Experimental device and method for simulating in-situ fluidized mining of deep metal ore |
| CN113699372A (en) * | 2021-08-13 | 2021-11-26 | 长江师范学院 | Microwave ultrasonic fluidization collaborative leaching device and operation method thereof |
| CN113908789A (en) * | 2020-07-09 | 2022-01-11 | 国家能源投资集团有限责任公司 | Pyrolysis reactor |
| CN115747488A (en) * | 2022-11-22 | 2023-03-07 | 东北大学 | Vanadium shale microwave suspension roasting-alkali mixing curing vanadium extraction system and vanadium extraction method thereof |
| CN115821067A (en) * | 2022-11-30 | 2023-03-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for producing vanadium slag by refining vanadium-removing slurry and ore pulp evaporation furnace |
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| CN111855902A (en) * | 2020-06-28 | 2020-10-30 | 北京科技大学 | Experimental device and method for simulating in-situ fluidized mining of deep metal ore |
| CN111855902B (en) * | 2020-06-28 | 2021-05-14 | 北京科技大学 | Experimental device and method for simulating in-situ fluidized mining of deep metal ore |
| CN113908789A (en) * | 2020-07-09 | 2022-01-11 | 国家能源投资集团有限责任公司 | Pyrolysis reactor |
| CN113908789B (en) * | 2020-07-09 | 2023-06-30 | 国家能源投资集团有限责任公司 | Pyrolysis reactor |
| CN113699372A (en) * | 2021-08-13 | 2021-11-26 | 长江师范学院 | Microwave ultrasonic fluidization collaborative leaching device and operation method thereof |
| CN115747488A (en) * | 2022-11-22 | 2023-03-07 | 东北大学 | Vanadium shale microwave suspension roasting-alkali mixing curing vanadium extraction system and vanadium extraction method thereof |
| CN115821067A (en) * | 2022-11-30 | 2023-03-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for producing vanadium slag by refining vanadium-removing slurry and ore pulp evaporation furnace |
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