CN203403140U - Two-way different-diameter labyrinth type magnetic roasting machine - Google Patents
Two-way different-diameter labyrinth type magnetic roasting machine Download PDFInfo
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- CN203403140U CN203403140U CN201320393165.0U CN201320393165U CN203403140U CN 203403140 U CN203403140 U CN 203403140U CN 201320393165 U CN201320393165 U CN 201320393165U CN 203403140 U CN203403140 U CN 203403140U
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Abstract
The utility model belongs to the technical field of preparation equipment and provides a two-way different-diameter labyrinth type iron ore magnetic roasting machine. The two-way different-diameter labyrinth type iron ore magnetic roasting machine is mainly characterized by comprising a heating device, a material feeding device, a roasting device, a dust removal device, a cooling device and a material conveying device. Compared with a conventional rotary kiln and a conventional shaft kiln, the two-way different-diameter labyrinth type iron ore magnetic roasting machine has the characteristics of low investment, compact structure, reducer conservation, high heat efficiency, small installation occupation area, operability, energy conservation, environment friendliness, stable capacity and the like, and is an ideal choice for preparation of weak magnetic mineral resources. With the development and application of the two-way different-diameter labyrinth type iron ore magnetic roasting machine, a new roasting magnetism recovery way is provided for sorting weak magnetic ores such as hematite, limonite and siderite of China, and social and economic benefits are promising.
Description
Technical field
The utility model belongs to preparation equipment technical field, is specifically related to the two-way reducing labyrinth type of a kind of iron ore magnetizing roasting machine.
Background technology
The resource of magnetite of China is limited, and the iron fine powder being produced by magnetite is at present that the main raw material of ferrous metallurgy industry is originated.Mineral resources has been closed on exhaustion, needs a large amount of Ore Imported, but that the weak magnetic ore ， such as rhombohedral iron ore, limonite, spathic iron ore China distributes is wide, and storage capacity is large.A little less than its magnetic, and restricted the production of ore dressing.Ferrous grade is in the weak magnetic ore deposit below 40%, because of magnetic separation invalid and idle and waste to it.Even if take some gravity separation technology, because yielding poorly, quality is unsecured, and can not form scale.In order to solve this knotty problem, as far back as the forties in last century, a large amount of magnetization experiments have been carried out both at home and abroad, under lab solved magnetization problem, aspect social application popularization, but because magnetization cost is high, facility investment is huge, and is difficult to be accepted by Mineral Processing Enterprises.
For this situation, at present, the roasting apparatus of use has: shaft furnace, belt type roasting machine and rotary kiln, and shaft furnace investment is huge, homogeneous heating difficulty, single stove throughput is restricted, and output is lower, only limits to rhombohedral iron ore, magnetite is baking mixed; And belt type roasting machine roasting, the upper and lower quality in ore deposit is inhomogeneous, the easy scaling loss of equipment, and heat-resisting allay material while needing to be equipped with high temperature, flow process is more complicated; And general rotary kiln baking is as reduction reaction space by longer cylindrical shell.From kiln hood to kiln tail, have tens meters long, manufacture and installation process, because equipment is long, installing and manufacturing has certain difficulty, invests larger.Owing to being heated continuously, cylindrical shell center is difficult to one heart aborning, and this will bring difficulty to production, and maintenance adjustment difficulty is larger.
Summary of the invention
The utility model people is little in line with facility investment, and magnetization cost is low, and the theory of non-environmental-pollution, has carried out long-term development; Finally make a set of gazogene and produce gas heat energy, mechanize cloth, two-way reducing labyrinth type magnetizing roasting machine.
For this reason, the purpose of this utility model is that a kind of facility investment of design is little, and magnetization cost is low, non-environmental-pollution, and baking operation is simple, control is convenient, firing cycle is short, can process various ores, the quality of production is evenly and without the two-way reducing labyrinth type magnetizing roasting machine of heat-resisting allay material.
In order to achieve the above object, two-way reducing labyrinth type magnetizing roasting machine described in the utility model comprises heating unit, feeding device, calciner, cleaning apparatus, refrigerating unit and conveying device, and wherein said heating unit comprises producer gas generator; Described feeding device comprises carries material windlass, hopper and lock wind feed valve; Described calciner comprises roasting solid of revolution, and roasting solid of revolution is divided into upper and lower two, and is roller frame; The front end of lower roasting solid of revolution is provided with labyrinth section; Upper and lower solid of revolution stack is installed and all has two groups of support rollers to be supported on framework, and roasting solid of revolution is driven by variable-frequency motor, and upper and lower roasting solid of revolution is by junctor connections of connect, and upper roasting solid of revolution feed end and feed bin are through locking wind feed valve perforation feed; Producer gas generator is connected with lower roasting solid of revolution; Described cleaning apparatus comprises duplex one-level spiral dust catcher, deuterostrophies fly-ash separator, three grades of spiral dust catchers, level Four spiral dust catcher, conditioning tower, thermal degradation device and chimneys; Described duplex one-level spiral dust catcher is communicated with upper roasting solid of revolution by induced draft fan; Described duplex one-level spiral dust catcher bottom is communicated with thermal degradation device; Described duplex one-level spiral dust catcher is communicated with deuterostrophies fly-ash separator, three grades of spiral dust catchers, level Four spiral dust catcher, conditioning tower successively by pipeline; Described refrigerating unit comprises hardening chamber and worm conveyor, and the end materials outlet of described lower roasting solid of revolution is communicated with hardening chamber; Described thermal degradation device is communicated with hardening chamber by air valve; Described conveying device comprises finished conveying device and finished product bin.
On above-mentioned, in roasting solid of revolution and in the latter half of lower roasting solid of revolution, be provided with material delivering plate, be convenient to material and flow forward.
For in reducing roasting process, improve gas radiation rate, promote heat exchange function, thereby increase production capacity.The first half of lower roasting solid of revolution is set to labyrinth section, that the first half labyrinth section of above-mentioned lower roasting solid of revolution is divided into is interior, in, external gyrorotor, the inwall of inside and outside solid of revolution is horizontally disposed with, also in wall, is provided with material delivering plate within it, is convenient to material and flows forward; End at the interior solid of revolution of the first half labyrinth of lower roasting solid of revolution section arranges material outlet; The middle solid of revolution of the first half labyrinth section of lower roasting solid of revolution is non-being horizontally disposed with, and descends the inwall front end of external gyrorotor of first half labyrinth section of solid of revolution high, rear end is low, be convenient to material and flow downward; Front end at the middle solid of revolution of the first half labyrinth of lower roasting solid of revolution section arranges material outlet; End at the external gyrorotor of the first half labyrinth of lower roasting solid of revolution section arranges material outlet.
The latter half of above-mentioned lower roasting solid of revolution, for strengthening reduction section, more fully reduces material.
Coal gas burner at total thermal source of roasting solid of revolution from lower solid of revolution discharge end; The hot gas flow being sprayed into by burner and material stream carry out incorgruous motion, thereby complete reducing roasting reaction, reach also magnetic effect of ore.
The flue dust producing in reducing roasting, be perikinetic with material stream, hot gas flow and dust enter duplex one-level spiral dust catcher through fan, and the raw ore dust that duplex one-level spiral dust catcher catches is sent into thermal decomposer, by thermal decomposer reduction reaction, thin dirt ore deposit enters secondary ash collector; The thin flue dust that duplex spiral dust catcher is discharged, enters secondary, three grades, level Four spiral dust catcher, after drain into conditioning tower, after conditioning tower reclaims useful mine dust, fine flue gas is communicated with through chimney and atmosphere; Whole flue dust catch rate can reach 85-90%; The ore dust of no reduction is reduced.
Material flow adds after heat abstraction attached water and crystal water at upper roasting solid of revolution, gives lower solid of revolution carry out reduction reaction through roasting solid of revolution junctor.In reduction reaction, first enter the labyrinth section of special making, rerun to strengthening reduction section; After reduction finishes, through air valve, enter hardening chamber, roasting reduction finishes.
The utility model is compared with traditional rotary kiln, shaft furnace, have little, the compact construction of investment, saving reductive agent, thermo-efficiency high, install that floor space is little, easy to operate, the feature such as energy-conserving and environment-protective, production capacity are stable, be the ideal chose of weak magnetic mineral resources ore dressing.The weak magnetic Ores such as Application and Development ，Jiang Dui of the present utility model China rhombohedral iron ore, limonite, spathic iron ore be you can well imagine for new roasting magnetic means also, social benefit promise well.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, feature of the present utility model is described further.
Fig. 1 is general assembly structural representation of the present utility model.
Fig. 2 is lower roasting solid of revolution of the present utility model labyrinth segment structure schematic diagram.
Fig. 3 is thermal degradation device schematic diagram of the present utility model.
Fig. 4 be in accompanying drawing 3 A to structural representation.
Fig. 5 is conditioning tower structural representation of the present utility model.
Fig. 6 be in accompanying drawing 5 A to sectional structure schematic diagram.
Fig. 7 be in accompanying drawing 5 B to sectional structure schematic diagram.
Fig. 8 is used process flow sheet of the present utility model.
In accompanying drawing, 1. chimney, 2. conditioning tower, 3. level Four spiral dust catcher, 4. three grades of spiral dust catchers, 5. deuterostrophies fly-ash separator, 6. descend roasting solid of revolution labyrinth section, 7. go up roasting solid of revolution, 8. feed cover, 9. carry material windlass, 10. lock wind feed valve, 11. hoppers, 12. induced draft fans, 13. duplex one-level spiral dust catchers, 14. fuel gas inlets, 15. air valves, 16. thermal degradation devices, 17. hot blasts, 18. producer gas generators, 19. finished product bins, 20. blower fans, 21. fuel burner nozzles, 22. covers of turning, 23. finished conveying devices, 24. worm conveyors, 25. hardening chambers, 26. strengthening reducing apparatus, 27. times roasting solid of revolution, 28. variable-frequency motors, 29. dirt ore deposit retrieving arrangements, solid of revolution in 30. times roasting solid of revolution labyrinth sections, solid of revolution in 31. times roasting solid of revolution labyrinth sections, 32. times roasting solid of revolution labyrinth section external gyrorotors, 33. material outlets, 34. material outlets, 35. material outlets, 36. remove deuterostrophies fly-ash separator, 37. from duplex one-level spiral dust catcher mine dust, 38. top tapered diffusion shells, 39. hot blast air distribution plates, 40. chimney draught fans, 41. atomizing nozzles.
Embodiment
Referring to accompanying drawing, two-way reducing labyrinth type magnetizing roasting machine described in the utility model comprises heating unit, feeding device, calciner, cleaning apparatus, refrigerating unit and conveying device, and wherein said heating unit comprises producer gas generator 18; Described feeding device comprises carries material windlass 9, hopper 11 and lock wind feed valve 10; Described calciner comprises roasting solid of revolution, and roasting solid of revolution is divided into upper and lower two 7,27, and is roller frame; The front end of lower roasting solid of revolution 27 is provided with labyrinth section 6; Upper and lower solid of revolution stack is installed and all has two groups of support rollers to be supported on framework, and roasting solid of revolution is driven by variable-frequency motor, and upper and lower roasting solid of revolution is connected in series by junctor, and upper roasting solid of revolution 7 feed ends and feed bin connect feed through lock wind feed valve 10; Producer gas generator 18 is communicated with lower roasting solid of revolution 27; Described cleaning apparatus comprises duplex one-level spiral dust catcher 13, deuterostrophies fly-ash separator 5, three grades of spiral dust catchers 4, level Four spiral dust catcher level Four fly-ash separator 3, conditioning tower 2, thermal degradation device 16 and chimneys 1; Described duplex one-level spiral dust catcher 13 is communicated with upper roasting solid of revolution 7 by induced draft fan 12; Described duplex one-level spiral dust catcher 13 bottoms are communicated with thermal degradation device 16; Described duplex one-level spiral dust catcher 13 is communicated with deuterostrophies fly-ash separator 5, three grades of spiral dust catchers 4, level Four spiral dust catcher 3, conditioning tower 2 successively by pipeline; Described refrigerating unit comprises hardening chamber 25 and worm conveyor 24, and the end materials outlet of described lower roasting solid of revolution 27 is communicated with hardening chamber 25; Described thermal degradation device 16 is communicated with hardening chamber 25 by air valve; Described conveying device comprises that finished product send device 23 and finished product bin 19.
On above-mentioned, in roasting solid of revolution 7 and in the latter half of lower roasting solid of revolution 27, be provided with material delivering plate, be convenient to material and flow forward.
For in reducing roasting process, improve gas radiation rate, promote heat exchange function, thereby increase production capacity.Referring to Fig. 2, (in Fig. 2, solid arrow is expressed as streams, dotted arrow is expressed as hot gas flow) first half of lower roasting solid of revolution is set to labyrinth section, that the first half labyrinth section 6 of above-mentioned lower roasting solid of revolution 27 is divided into is interior, in, external gyrorotor 30,31,32, the inwall of inside and outside solid of revolution is horizontally disposed with, also in wall, is provided with material delivering plate within it, is convenient to material and flows forward; End at the interior solid of revolution of the first half labyrinth of lower roasting solid of revolution 27 section arranges material outlet 33; The middle solid of revolution of the first half labyrinth section of lower roasting solid of revolution 27 is non-being horizontally disposed with, and descends the inwall front end of external gyrorotor of first half labyrinth section of solid of revolution 27 high, rear end is low, be convenient to material and flow downward; Front end at the middle solid of revolution of the first half labyrinth of lower roasting solid of revolution 27 section arranges material outlet 34; End at the external gyrorotor of the first half labyrinth of lower roasting solid of revolution 27 section arranges material outlet 35; The reducing roasting length of 3 meters has become 9 meters of length in section cylindrical shell, and thermal emissivity rate improves 200% thus, and heat transfer effect promotes thereupon, has increased production capacity.
The latter half of above-mentioned lower roasting solid of revolution 27, for strengthening reduction section, more fully reduces material.
In order to make equipment cause little pollution to atmosphere, dirt ore deposit after dedusting need be processed through conditioning tower, and conditioning tower structure is a vertical cylindrical shell, and cone-shaped diffuser 38 is arranged at top, be connected with level Four spiral dust catcher 3, cone-shaped diffuser 38 bottoms arrange hot blast air distribution plate 39, and air distribution plate bottom arranges atomizing nozzle 41, come the hot gas of Self-duster and atomized water to carry out two-phase convective heat exchange, form water vapour, with micro-mine dust, drain into bottom, enter and reclaim chamber, gas enters chimney by induced draft fan 40.
In order to realize the reduction of labyrinth type cylindrical shell, taked reducing design, i.e. charging drying section diameter is less, and while being beneficial to material stream and the incorgruous motion of air-flow, space is less, increases Space Thermal response intensity, separated faster with ore crystal water to mineral surface attached water.Charging drying section is above equipment, and labyrinth is designed in the larger roasting reduction section of diameter, and below equipment, magnetization termination is just at the larger reduction section of diameter.Upper and lower reducing cylindrical shell is connected by fixing barrel cover, from being fed to discharging, realizes two-way reducing design.
The utility model is in reducing roasting process, and raw ore does not increase and sneaks into any reductive agent.In conventional reduction roasting process, raw ore will be sneaked into 5%-10% coal dust, although do like this, can promote reducing roasting, correspondingly brings three drawbacks; (1) increase energy cost.(2) to Environmental-protecting dust-removing, bring pressure.(3) after coal dust reaction, remain in mineral aggregate, can reduce the grade of roasted ore.
The utility model is taked level Four dust collecting process, in order to control fine level breeze, enter two to level Four fly-ash separator, the strict discharge dirt ore deposit of controlling, taked duplex one-level spiral dust catcher, mine dust in all reducing roasting process is reclaimed, enter additional heat splitter and process, after magnetization, by conditioning tower, recycled.This design is than general rotary kiln circulating dust-removing better effects if, and environment protecting obviously promotes.
Material flows to after roasting solid of revolution, and with the incorgruous motion of hot gas flow, its temperature is at 250 °-450 °, and the attached water of its mineral aggregate is completely separated with crystal water, and material flows to into lower solid of revolution labyrinth section and carries out reduction reaction afterwards, and this section of reducing atmosphere is at 570 °-750 °.In order to ensure ore reduction magnetization, at reduction section, be provided with strengthening roasting point apparatus, its technique, for collecting burner combustion bundle, to strengthen material stream reduction reaction, is subject to the temperature of focus to reach 1050 ° in strengthening.Mineral aggregate termination reaction, after shrend, head grade promotes 3%-10%, and susceptibility can reach 80%-90%.
During use, by raw ores such as rhombohedral iron ore, limonite, spathic iron ores, carry out composition chemical examination, determine original ore property and feature, be beneficial to determining of sinter process; By raw ore broken, thin broken slightly, require granularity at 0-20 millimeters, rise to high-order hopper standby; Start producer gas generator, enough combustion gas occur, solid of revolution discharge end is for combustion gas downwards, coal gas burner is lighted, and produces hot gas flow, by lower solid of revolution through the unitor solid of revolution supply hot gas flow that makes progress, when feed end temperature reaches 250 °, illustrate down that solid of revolution reducing atmosphere will reach 570 °; Now feed end starts to measure feed, gives and to expect that discharge will go through 60-70 minutes, and reduction reaction can finish, thereby obtains mineral magnetization.
After reduction reaction, obtain the desirable magnetic mineral aggregate of going back, but can not again reduce, then the mineral aggregate under hot has been carried out to shrend, stablized reduction effect.After shrend is cooling, from hardening chamber, be transported to magnetization workshop, carry out ball milling, low intensity magnetic separation system, final concentrate powder output.Grade can reach 61-63%.
After hot gas flow and the incorgruous reaction of material stream, the flue dust in air-flow runs to duplex one-level spiral dust catcher from charging air valve lower channel and carries out separation, and thick dirt is drained in thermal decomposer by fly-ash separator lower cone section; Thin dirt by duplex one-level spiral dust catcher progressively drain into two, three, level Four spiral dust catcher, drain into subsequently conditioning tower and reclaim, last fine wetting vapour is discharged by chimney.The rough dirt being received by thermal decomposer, after reduction reaction, delivers to two, three, level Four spiral dust catcher.Then by conditioning tower, recycle magnetization mine dust, other wetting vapour is discharged by chimney.
Use the performance index of two-way reducing labyrinth type magnetizing roasting machine described in the utility model:
1, upper roasting solid of revolution diameter is 1.5 meters; 1.9 meters of lower roasting solid of revolution diameters
Upper roasting solid of revolution drying and dewatering temperature: 250 °-450 °, 13.5 meters of length;
Lower roasting solid of revolution contains labyrinth reduction section reduction temperature: 570 °-750 °, and 20 meters of length;
Strengthening temperature spot: 1050 °;
Total recovery time: 60-70 minutes.
2, producer gas generator:
Diameter: 1.5 meters,
1000-1500 cubic meters/hour of gas production rate,
350-400 kgs/hr, consumption coal,
56 °-65 ° of saturated air and air themperature,
0.01-0.013 kPa of coal gas air pressure,
Coal is non-caking coal, hard coal, coke.
Take Shanxi limonite as example: head grade is 25%, grade 36% after roasting magnetization, magnetizing roasting rate 80%-85%, dust rate 1%-1.5%, low intensity magnetic separation concentrate product grade 61%-62%, 4-6 tons/hours of output, by 5 tons/hour of output, product per ton is sparing in the use of coal 50 kilograms, 40 kilowatts of electricity consumption installation total volumies.
Claims (3)
1. a two-way reducing labyrinth type magnetizing roasting machine, it is characterized in that described two-way reducing labyrinth type magnetizing roasting machine comprises heating unit, feeding device, calciner, cleaning apparatus, refrigerating unit and conveying device, wherein said heating unit comprises producer gas generator; Described feeding device comprises carries material windlass, hopper and lock wind feed valve; Described calciner comprises roasting solid of revolution, and roasting solid of revolution is divided into upper and lower two, and is roller frame; The front end of lower roasting solid of revolution is provided with labyrinth section; Upper and lower solid of revolution stack is installed and all has two groups of support rollers to be supported on framework, and roasting solid of revolution is driven by variable-frequency motor, and upper and lower roasting solid of revolution is by junctor connections of connect, and upper roasting solid of revolution feed end and feed bin are through locking wind feed valve perforation feed; Producer gas generator is connected with lower roasting solid of revolution; Described cleaning apparatus comprises duplex one-level spiral dust catcher, deuterostrophies fly-ash separator, three grades of spiral dust catchers, level Four spiral dust catcher, conditioning tower, thermal degradation device and chimneys; Described duplex one-level spiral dust catcher is communicated with upper roasting solid of revolution by induced draft fan; Described duplex one-level spiral dust catcher bottom is communicated with thermal degradation device; Described duplex one-level spiral dust catcher is communicated with deuterostrophies fly-ash separator, three grades of spiral dust catchers, level Four spiral dust catcher, conditioning tower successively by pipeline; Described refrigerating unit comprises hardening chamber and worm conveyor, and the end materials outlet of described lower roasting solid of revolution is communicated with hardening chamber; Described thermal degradation device is communicated with hardening chamber by air valve; Described conveying device comprises finished conveying device and finished product bin.
2. two-way reducing labyrinth type magnetizing roasting machine according to claim 1, is characterized in that in roasting solid of revolution and in the latter half of lower roasting solid of revolution, being provided with material delivering plate on above-mentioned.
3. two-way reducing labyrinth type magnetizing roasting machine according to claim 2, the first half that it is characterized in that described roasting solid of revolution is set to labyrinth section, that the first half labyrinth section of above-mentioned lower roasting solid of revolution is divided into is interior, in, external gyrorotor, the inwall of inside and outside solid of revolution is horizontally disposed with, and in wall, be provided with material delivering plate within it; End at the interior solid of revolution of the first half labyrinth of lower roasting solid of revolution section arranges material outlet; The middle solid of revolution of the first half labyrinth section of lower roasting solid of revolution is non-being horizontally disposed with, and descends the inwall front end of external gyrorotor of first half labyrinth section of solid of revolution high, rear end is low; Front end at the middle solid of revolution of the first half labyrinth of lower roasting solid of revolution section arranges material outlet; End at the external gyrorotor of the first half labyrinth of lower roasting solid of revolution section arranges material outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320393165.0U CN203403140U (en) | 2013-07-04 | 2013-07-04 | Two-way different-diameter labyrinth type magnetic roasting machine |
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| CN201320393165.0U CN203403140U (en) | 2013-07-04 | 2013-07-04 | Two-way different-diameter labyrinth type magnetic roasting machine |
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| CN203403140U true CN203403140U (en) | 2014-01-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409614A (en) * | 2013-07-04 | 2013-11-27 | 南召县英利矿山机械有限公司 | Bidirectional reducing labyrinth type roasting machine |
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2013
- 2013-07-04 CN CN201320393165.0U patent/CN203403140U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409614A (en) * | 2013-07-04 | 2013-11-27 | 南召县英利矿山机械有限公司 | Bidirectional reducing labyrinth type roasting machine |
| CN103409614B (en) * | 2013-07-04 | 2015-05-13 | 南召县英利矿山机械有限公司 | Bidirectional reducing labyrinth type roasting machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140122 Effective date of abandoning: 20150513 |
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| RGAV | Abandon patent right to avoid regrant |