CN105734272B - A kind of mechanical dynamic suspends with one-step baking beneficiation method and device - Google Patents
A kind of mechanical dynamic suspends with one-step baking beneficiation method and device Download PDFInfo
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- CN105734272B CN105734272B CN201610096242.4A CN201610096242A CN105734272B CN 105734272 B CN105734272 B CN 105734272B CN 201610096242 A CN201610096242 A CN 201610096242A CN 105734272 B CN105734272 B CN 105734272B
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- 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
Abstract
A kind of mechanical dynamic suspends with one-step baking beneficiation method, belongs to technical field of mineral processing.Different based on handled ore properties and roasting purpose, by controlling reactor feed speed, mixing speed, the ore of fired tail gas preliminarily dried completes primary election in centrifugation, broken and resuspension procedure and selects again；Control sintering temperature, calcination atmosphere, furnace zone residence time, complete pyrolysis, reduction or the oxidizing roasting to ore；Regulation aperture of filter screen, air inducing fan delivery and blast, control one-level, two grades, the grade of the mine tailing that three-stage cyclone separator is collected and high and low two-stage product metal target.Ore in the same apparatus, completes drying, primary election, crushes, selects again, being pyrolyzed or reduction roasting or oxidizing roasting, product of roasting classification and sorting flow.Utilization rate of equipment and installations is high, high in machining efficiency, to ore and technological parameter strong adaptability, reduces or oxidizing gas reusable edible, and energy consumption is relatively low, and clean environment firendly is easy to operate, product quality stabilization, good economy performance.
Description
Technical field
The invention belongs to technical field of mineral processing, it is related to a kind of mechanical dynamic to suspend with one-step baking beneficiation method and dress
Put.
Background technology
Roasting technology has that reaction time is short, technology path flexibly, product diversity, cost and operating cost is few, conversion
Rate is high and is easily achieved the remarkable advantages such as industrialization.At present, oneself is calcined through as multi mineral Feedstock treating technical research neck
It is also an essential important step in mineral processing and chemical field where being focused in domain.
The conventional roasting apparatus such as current shaft furnace, rotary kiln, Flash Smelting Furnace are achieved in fields such as chemical industry and are widely applied,
But many problems are there is also in application process.Rotary kiln there are problems that when working, and the corollary equipment of Flash Smelting Furnace is thrown
Money is larger, and economy is not good.
Fluidized-solids roaster refers to the burner hearth being calcined with fluidized state, is that a kind of roasting popular at present sets
It is standby, the burning of coal is mainly used in, with simple structure, the advantage of high combustion efficiency.But during roasting, fine grained in fluid bed
Material is easily taken out of by flue gas, and flying dust is more in flue gas, and the roasting material calcination atmosphere in uneven, stove that is heated is difficult to control.And
Ore is sorted, is pyrolyzed or roasting process need to be carried out respectively when carrying out ore dressing using fluid bed, and technological process is long, energy utilization rate
It is low.
Patent of invention CN103031433A discloses a kind of concentrated ilmenite fluidization oxidizing roasting-fluidized reduction roasting system
System and roasting technique.Oxidizing roasting is carried out to concentrated ilmenite powder using fluid bed oxidation reactor；Powder after oxidation enters
Fluid bed reduction reactor carries out reduction roasting；Powder after reduction is cooled down through fluidized bed cooler；Fluid bed reduction reactor
Discharge tail gas first discharges the latent heat of wherein unreacted reducing gas by burning in a combustion chamber, gas and fluid bed oxygen after burning
After changing reactor discharge tail gas mixing heat is reclaimed into mulitistage cyclone with the heat exchange of concentrated ilmenite powder；The invention has
Reaction efficiency is high, and fully, the advantages of roasting process good economy performance, but roasting flow is complex, roasting condition control for Btu utilization
System is difficult, and ore is not sorted further.
Patent of invention CN104846189A discloses a kind of mixing iron ore fluosolids roasting method for separating containing siderite.Will
The mixing iron ore containing siderite of granularity -0.5mm carries out multistage fluidized preheating in oxidizing atmosphere, is preheating to mixing iron ore temperature
Spend is 600-800 DEG C；Under the conditions of state is fluidized, preheating resulting material is calcined in reducing atmosphere, be further arranged in air
Carry out fluidization and be cooled to room temperature, then mill ore magnetic selection is both obtained.The method of the invention is applied to various composite ores containing siderite
Sorting, reaction is very fast, is unfavorable for that the accessory substance for sorting is few in technical process, good separation effect.But multistage fluidized device is accounted for
Ground area is larger, and sintering temperature and gas velocity control etc. are all more difficult, and energy utilization rate is low.
The content of the invention
Suspended with one-step baking beneficiation method the invention provides a kind of mechanical dynamic, using the mechanical dynamic same one-step baking of suspension
Device, makes ore particle be contacted with larger relative velocity with rotation thermal current two-phase.In the strong shearing of thermal current, blow floating and turbulence
Under effect, ore particle is dried and crushed in rotation, suspended state.Dried little particle ore enters firing chamber in suspended state,
With suspended state sufficient dwell time in firing chamber, based on different atmosphere, the transformed of pyrolysis, reduction roasting or oxidizing roasting is completed
Journey.After roasting, ore is classified through filter screen and cyclone separator, obtains different stage product.
Specific embodiments of the present invention comprise the following steps：Using the synchronous calciner of mechanical dynamic suspension, ore warp
Preliminarily dried and the heating of the tail gas of discharge are calcined, by the dynamic suspension section of screw feeder feeding reactor, in dynamic suspension
Section is stirred, dries, being centrifuged, crushing；Gas (inertia, oxidisability or reproducibility) sends into hot blast point after being heated to required temperature
Cloth device, reacted device bottom slit enters fluidisation section and is fully contacted with the ore being stirred with larger wind speed, in agitator, tangentially
In the presence of thermal current and ore are mutually collided, centrifugation agitated compared with small particle ore completes primary election, forms suspended state and starts
Furnace zone is ascended into, greater particle size ore is crushed in suspension section by agitator, realize target minreal monomer dissociation, completed again
Choosing.Product after roasting is discharged through filter screen under rotation hot blast effect by exhaust duct, then isolated through three-stage cyclone separator
The product of size fractionated.Used as mine tailing, two grades are collected into the product that primary cyclone is collected into three-stage cyclone separator
High and low grade product.The hot gas of discharge introduces feeder through exhaust fan to be continued tentatively to heat ore.Not by filter
The ore of net drops back into furnace zone, then completes above-mentioned working cycles.
The synchronous calciner of mechanical dynamic suspension includes：
Recovery room, filter screen, firing chamber, observation window, floater, cool air hose, motor, deceleration device, power transmission shaft, taper stirring
Device, support meanss, gas heater, screw feeder and feed bin, exhaust pipe, cyclone separator, air-introduced machine.
In the synchronous calciner, floater, firing chamber, recovery room in the vertical direction are sequentially arranged from bottom to top.
Wherein, the connection of floater side wall screw feeder and feed bin, new mixture bar is installed at room center.Firing chamber side wall installs observation
Window, is used to observe particle roasting and suspended state；Filter screen is installed at top, and the product after roasting is tentatively sieved by Particle size requirements
Choosing.New mixture bar is driven by motor.Gas heater one end connects cool air hose, the other end and screw feeder and feed bin phase
Even, it is used to preheat material and dried.Ceiling end is reclaimed in the connection of exhaust pipe one end, and the other end is sequentially connected in series rotation
Wind separator and air-introduced machine are simultaneously finally connected into screw feeder and feed bin to constitute loop.
In the existing beneficiation method such as the beneficiation method and gravity treatment, magnetic separation and flotation, single ore-dressing plant is only capable of realizing spy
Surely sort step to compare, this method makes drying, centrifugation, primary election, crushes, selects again, being pyrolyzed or reduction roasting or oxidizing roasting, is calcined
Product classification and sorting flow is carried out in the same apparatus.The roasting ore dressing that can be applied not only to viscous mineral and high-carbon ore is rich
Collection, and the reduction roasting suitable for oxide ore reducing atmosphere, or oxidizing roasting of the reduced ore under oxidizing atmosphere, to ore deposit
The roasting ore dressing effect of the thinner material of valuable mineral disseminated grain size is preferable in stone.Model is adapted to ore, temperature and process conditions
The factors such as wide property, the particle size distribution characteristics of target mineral according to process object are enclosed, by adjusting charging rate, stirring speed
The plant running parameter such as degree, sintering temperature, calcination atmosphere, reaches the indexs such as grade, the rate of recovery.
It is made up of twi-tier blade on the new mixture bar of the synchronous calciner, vane tip carries small scraper plate, mainly
Play a part of that radial-axial stream is scabbed and formed on broken and removing wall；Bottom is the frame blade with certain gradient,
It is main to play to be scabbed on removing wall and formed axially stream.Mixing speed is adjustable during work.
Cyclone separator in described device can be according to target mineral particle size distribution characteristics in ore and roasting purpose, material
The factors such as grade, pyrolysis removing, reduction and oxidizing roasting degree are adjusted, to obtain different mesh from three-level separator respectively
Mark grade product.
Exhaust pipe in described device is arranged by downstream mode, can run compared with low gas velocity, to save air-flow
Conveying energy consumption.Inertia, oxidation or reducibility gas are passed through gas heater, to complete pyrolysis, reduction roasting or the oxidation of ore
Roasting.Regulation aperture of filter screen, air inducing fan delivery and blast, with control material furnace zone residence time.Cool air hose can be to outstanding
Floating section air quantity and the aspect of gas heater two are adjusted.
The present invention has advantages below compared with prior art：By primary election, again select, be calcined, be classified and enter in the same apparatus
OK, strong to ore and roasting parameter adaptation, pyrolysis, reduction or oxidizing gas reusable edible, energy consumption are relatively low, clean environment firendly,
With short production cycle, controllability is strong, it is easy to accomplish large-scale production, and high degree of automation, product quality stabilization, good economy performance,
Remaining tailings amount is few after extraction.Can be widely applied to the mineral such as magnesite, siderite, clay vanadium mineral, bone coal and vanadium titano-magnetite
Pyrolysis, reduction or oxidizing roasting and the wherein enrichment of valuable metal.
Brief description of the drawings
Fig. 1 is the involved synchronous calciner schematic diagram of mechanical dynamic suspension of the present invention.
1. recovery room, 2. filter screen, 3. firing chamber, 4. observation window, 5. floater, 6. cool air hose, 7. motor, 8. slow down dress
Put, 9. power transmission shaft, 10. new mixture bar, 11. support meanss, 12. gas heaters, 13. screw feeders and feed bin, 14. tails
Letter shoot, 15. cyclone separators, 16. air-introduced machines.
Specific embodiment
Embodiment 1
V will be contained to be sieved for 1.14%, V (III) accounts for the clay vanadium mineral that total V content is 66.02%, each grade V content
It is as follows：+ 0.6mm, 0.51%；- 0.6mm~+0.3mm, 0.57%；- 0.3mm~+0.15mm, 1.72%；- 0.15mm,
2.02%.By ore reduction, simultaneously ore grinding, to below 0.3mm, from screw feeder and the adding apparatus of feed bin 13, adjusts air-flow velocity
Make it in floater in suspended state, and firing chamber stayed in suspended state at 800 DEG C to be calcined.Particle after loss of weight passes through
Screen cloth, is brought into exhaust pipe by air-flow, is reclaimed by 3 grades of cyclone separators.After measured, the product that three-stage cyclone separator is reclaimed
V in product granularity and product2O5Content is respectively：- 0.3mm~+0.15mm, 0.47%；- 0.15mm~+0.074mm, 1.88%；-
0.074mm, 2.41%.Wherein, primary cyclone product is mine tailing, and two grades is low-grade product, and three-level is produced for high-grade
Product.Vanadium overall recovery is 75.26% in two three-level products.The total oxygenation efficiency of vanadium reaches 96.18%.
Embodiment 2
By carbon containing 16.15%, sieved for 0.93%, V (III) accounts for the bone coal that total V content is 83.89% containing V, each grain
Level V content is as follows：+ 0.3mm, 0.32%；- 0.3mm~+0.15mm, 0.69%；- 0.15mm~+0.074mm, 1.46%；-
0.074mm, 1.12%.By the broken simultaneously ore grinding of bone coal to below 0.3mm, from screw feeder and the adding apparatus of feed bin 13, regulation
Air-flow velocity makes it in floater in suspended state, and stays in firing chamber in suspended state at 750 DEG C and be calcined.After loss of weight
Particle is brought into exhaust pipe by screen cloth by air-flow, is reclaimed by 3 grades of cyclone separators.After measured, three-stage cyclone separator
V in the product granularity and product of recovery2O5Content is respectively：- 0.3mm~+0.15mm, 0.41%；- 0.15mm~+0.074mm,
1.96%；- 0.074mm, 1.33%.Wherein, primary cyclone product is mine tailing, and two grades is high grade product, and three-level is
Low-grade product.Vanadium overall recovery is 80.16% in two three-level products.The total oxygenation efficiency of vanadium reaches 82.75%.Carbon removing in ore
Rate reaches 100%.
Embodiment 3
The sparring green ore that full Iron grade is 41.57% is sieved, each grade Fe contents are as follows：+ 0.3mm,
9.84%；- 0.3mm~+0.15mm, 24.91%；- 0.15mm~+0.074mm, 13.22%；- 0.074mm~+0.038mm,
39.18%；- 0.038mm, 50.04%.By ore reduction, simultaneously ore grinding, to below 0.15mm, adds from screw feeder and feed bin 13
Enter device, regulation air-flow velocity makes it in floater in suspended state, and firing chamber stayed in suspended state at 800 DEG C to be roasted
Burn.Particle after loss of weight is brought into exhaust pipe by screen cloth by air-flow, is reclaimed by 3 grades of cyclone separators.After measured, three
Fe contents are respectively in the product granularity and product of level cyclone separator recovery：- 0.15mm~+0.074mm, 26.65%；-
0.074mm~+0.038mm, 59.19%；- 0.038mm, 64.27%.Wherein, primary cyclone product is mine tailing, two grades
It is low-grade product, three-level is high grade product.Full Iron grade reaches 60.12% in two three-level products, and overall recovery is
74.35%, total magnetic susceptibility reaches 3.13.
Embodiment 4
Sieved flotation concentrate is dried containing the magnesite that MgO is 45.80%, each grade content of MgO is as follows：-
0.15mm~+0.074mm, 45.03%；- 0.074mm~+0.038mm, 46.49%；- 0.038mm, 46.53%.By ore certainly
Screw feeder and the adding apparatus of feed bin 13, regulation air-flow velocity make it in floater in suspended state, and in suspension at 800 DEG C
State stays in firing chamber and is calcined.Particle after loss of weight is brought into exhaust pipe by screen cloth by air-flow, by 3 grades of whirlwind
Separator is reclaimed.After measured, the product granularity that three-stage cyclone separator is reclaimed is respectively：- 0.15mm~+0.074mm；-
0.074mm~+0.038mm；-0.038mm.Wherein, primary cyclone product is mine tailing, the discharge of two three-stage cyclone separators
MgO total contents reach 98.6% in product, and overall recovery is 90.70%.
Embodiment 5
By all iron content 52.86%, FeO contents are that 29.28% certain vanadium titano-magnetite is sieved, each grade Fe contents
It is as follows：+ 0.3mm, 28.50%；- 0.3mm~+0.15mm, 44.91%；- 0.15mm~+0.074mm, 56.63%；-
0.074mm~+0.038mm, 38.27%；- 0.038mm, 30.04%.By ore reduction and ore grinding to below 0.3mm, from spiral
Feeder and the adding apparatus of feed bin 13, are passed through by 50% H in the reactor2, 40% CO and 10% N2The gaseous mixture of composition
Body constitutes reducing atmosphere, and regulation air-flow velocity makes ore particle in floater in suspended state, and is stayed in suspended state at 1000 DEG C
Firing chamber is calcined.Particle after loss of weight is brought into exhaust pipe by screen cloth by air-flow, is returned by 3 grades of cyclone separators
Receive.After measured, Fe contents are respectively in the product granularity and product of three-stage cyclone separator recovery：- 0.3mm~+0.15mm,
45.44%；- 0.15mm~+0.074mm, 74.91%；- 0.074mm, 63.02%.Wherein, primary cyclone product is
Mine tailing, two grades is high grade product, and three-level is low-grade product.Overall recovery is in two three-stage cyclone separators discharge product
84.48%, iron percent reduction reaches 90.72%, and degree of metalization reaches 89.05%.
Claims (5)
1. a kind of mechanical dynamic suspends with one-step baking beneficiation method, it is characterised in that technological process is as follows：It is outstanding using mechanical dynamic
Float with one-step baking ore-dressing plant；The ore of fired tail gas preliminarily dried, the dynamic suspension of reactor is sent into by screw feeder
Section；The gas for being heated to specified temp is sent into by distributor, and reacted device bottom slit enters suspension section with larger speed, with
The ore being stirred is fully contacted；In the presence of agitator, tangential hot gas and ore are mutually collided, passed through compared with small particle ore
Stirring, centrifugation complete primary election, and formation suspended state begins to ramp up and enters furnace zone, and greater particle size ore is in suspension section by agitator
It is broken, target minreal monomer dissociation is realized, completion is selected again；Roasted product is separated through filter screen by three-stage cyclone separator, obtains height
Low-grade product and mine tailing；Hot gas introduces feeder and ore is tentatively heated through exhaust fan；Not by the ore deposit of filter screen
Stone drops back into furnace zone, then completes above-mentioned working cycles；
Wherein, the mechanical dynamic suspends and includes with one-step baking ore-dressing plant：Recovery room (1), filter screen (2), firing chamber (3), sight
Examine window (4), floater (5), cool air hose (6), motor (7), deceleration device (8), power transmission shaft (9), new mixture bar (10), support
Device (11), gas heater (12), screw feeder and feed bin (13) exhaust pipe (14), cyclone separator (15), draw
Blower fan (16)；
Wherein, it is made up of twi-tier blade on the new mixture bar of the synchronous calciner of mechanical dynamic suspension, vane tip band
There is small scraper plate, it is main to play a part of that radial-axial stream is scabbed and formed on broken and removing wall；Bottom is with certain inclination
The frame blade of degree, main to play to be scabbed on removing wall and formed axially stream, mixing speed is adjustable during work.
2. mechanical dynamic according to claim 1 suspends with one-step baking beneficiation method, it is characterised in that make to dry, centrifugation,
Primary election, crush, select again, being pyrolyzed or reduction roasting or oxidizing roasting, product of roasting classification and sorting flow is carried out in the same apparatus；
Can be applied not only to the roasting beneficiation enrichment of viscous mineral and high-carbon ore, and the going back reducing atmosphere suitable for oxide ore
Original roasting, or oxidizing roasting of the reduced ore under oxidizing atmosphere, the roasting of the material thinner to valuable mineral disseminated grain size in ore
Burn ore dressing effect preferable；Wide adaptation range is adapted to ore, temperature and process conditions, according to property, the target ore deposit of process object
The particle size distribution characteristics factor of thing, by adjusting charging rate, mixing speed, sintering temperature, calcination atmosphere operational factor reach
Grade, rate of recovery index.
3. mechanical dynamic according to claim 1 suspends with one-step baking beneficiation method, it is characterised in that the same to one-step baking
In ore-dressing plant, floater, firing chamber, recovery room in the vertical direction are sequentially arranged from bottom to top；Wherein, floater side wall connects
Screw feeder and feed bin are connect, new mixture bar is installed at room center；Firing chamber side wall installs observation window, is used to observe particle roasting
And suspended state；Filter screen is installed at top, and preliminary screening is carried out by Particle size requirements to the product after roasting；New mixture bar is by motor
Drive, gas heater one end connection cool air hose, the other end is connected with screw feeder and feed bin, be used to carry out material pre-
Heat；Ceiling end is reclaimed in the connection of exhaust pipe one end, and the other end is sequentially connected in series cyclone separator and air-introduced machine and finally connects
Enter screw feeder and feed bin, form loop, baking tail gases are used to carry out preliminarily dried to ore.
4. mechanical dynamic according to claim 1 suspends with one-step baking beneficiation method, it is characterised in that in described device
Cyclone separator can according to target mineral particle size distribution characteristics in ore and roasting purpose, material grade, pyrolysis removing, reduction and
Oxidizing roasting degree factor is adjusted, to obtain different target grade product from three-level separator respectively.
5. mechanical dynamic according to claim 1 suspends with one-step baking beneficiation method, it is characterised in that in described device
Exhaust pipe is arranged by downstream mode, run compared with low gas velocity, to save air-flow conveying energy consumption；Inertia, oxidation are gone back
Originality gas is passed through gas heater, completes pyrolysis, reduction roasting or the oxidizing roasting of ore；Regulation aperture of filter screen, air-introduced machine
Air quantity and blast, with control material furnace zone residence time；Cool air hose can be to suspension section air quantity and the side of gas heater two
Face is adjusted.
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| CN201610096242.4A CN105734272B (en) | 2016-02-22 | 2016-02-22 | A kind of mechanical dynamic suspends with one-step baking beneficiation method and device |
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| CN105734272B true CN105734272B (en) | 2017-06-23 |
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| CN106591589B (en) * | 2017-01-12 | 2018-07-27 | 绍兴梁潮化纤有限公司 | A kind of rare earths material high-precision purifying plant |
| CN106868292B (en) * | 2017-03-31 | 2018-04-06 | 东北大学 | A kind of refractory iron ore multistage suspension magnetizing roast magnetic separation system device and method |
| CN109128015B (en) * | 2018-10-31 | 2020-10-23 | 共享智能铸造产业创新中心有限公司 | Thermal method regenerated fluidization and roasting furnace for test |
| CN111892832B (en) * | 2020-07-29 | 2021-04-06 | 东北大学 | Method for preparing multistage calcined kaolin by suspension calcination of coal-series kaolin |
| CN114594073B (en) * | 2022-01-25 | 2023-08-11 | 虔东稀土集团股份有限公司 | Rare earth metal production online detection method and system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH622229A5 (en) * | 1975-03-18 | 1981-03-31 | Raoul Borner | Process for burning minerals and equipment for carrying out the process |
| CN85108710B (en) * | 1985-12-02 | 1988-05-25 | 冶金工业部马鞍山矿山研究院 | Process and equipment for light burning magnesite in ebullating calciner |
| DE19750475C1 (en) * | 1997-11-14 | 1999-04-08 | Treibacher Schleifmittel Ag | High temperature treatment of very small particles |
| CN101524667B (en) * | 2009-02-17 | 2011-05-04 | 武汉工程大学 | Process for dressing ore of powder low grade iron oxide ore |
| CN103031433B (en) * | 2011-09-30 | 2014-07-30 | 中国科学院过程工程研究所 | Fluidized oxidation roasting-fluidized reduction roasting system and roasting process for titaniferous iron concentrate |
| CN202420148U (en) * | 2011-11-14 | 2012-09-05 | 山东瑞福锂业有限公司 | Rotary kiln for reaction of extracting lithium from lepidolite |
| CN104846189B (en) * | 2015-06-05 | 2017-07-11 | 中国地质科学院矿产综合利用研究所 | Fluidized roasting separation method for siderite-containing mixed iron ore |
| CN104911336B (en) * | 2015-06-29 | 2017-05-17 | 北京科技大学 | Method and device for pre-enriching vanadium in downstream stone coal |
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