CN103234339B - Device for ilmenite concentrate microwave drying and application method thereof - Google Patents
Device for ilmenite concentrate microwave drying and application method thereof Download PDFInfo
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- CN103234339B CN103234339B CN201310156362.5A CN201310156362A CN103234339B CN 103234339 B CN103234339 B CN 103234339B CN 201310156362 A CN201310156362 A CN 201310156362A CN 103234339 B CN103234339 B CN 103234339B
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- microwave heating
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- ilmenite concentrate
- drying
- heating equipment
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- 239000012141 concentrate Substances 0.000 title claims abstract description 60
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000001035 drying Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 93
- 239000000463 material Substances 0.000 claims abstract description 26
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000007599 discharging Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005188 flotation Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000012716 precipitator Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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- Drying Of Solid Materials (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a device for ilmenite concentrate microwave drying and an application thereof, and belongs to the application field of microwave heating technology. The device for ilmenite concentrate microwave drying structurally comprises three sections of microwave heating devices, and the three sections of the microwave heating devices are arranged in a straight line mode, connected in an end-to-end mode and distributed in a stepped mode; every section of the microwave heating device comprises a belt conveyer and a microwave heating cavity, and the belt conveyer penetrates through the microwave heating cavity; and one end of the microwave heating device on the highest step is provided with a vibratory feeder, and the microwave heating device on the lowest step is provided with a discharging device. The application method of the device for ilmenite concentrate microwave drying comprises firstly adjusting the belt rotating speed, the air exhausting quality of air exhausting air ducts and the different microwave power of the three sections of the microwave heating devices, then laying the ilmenite concentrate on belts through the vibratory feeder and adjusting the thickness of the ilmenite concentrate through a material layer baffle, and finally obtaining dried ilmenite concentrate with a water content less than 1wt% (weight percentage) from the discharging device of the microwave heating device on the lowest stage. According to the device for ilmenite concentrate microwave drying and the application method thereof, an efficient and clean drying method under the conditions of long distance, high load and large flow is obtained.
Description
Technical field
The present invention relates to a kind of equipment and application of microwave drying ilmenite concentrate, belong to microwave heating technique application.
Background technology
Titanium is universally acknowledged scarce resource and important strategic material, is the backing material of carrier rocket, guided missile, satellite, opportunity of combat, nuclear submarine etc.Ilmenite concentrate produces the primary raw material of titanium dioxide, high titanium slag and synthetic rutile, it mainly from ilmenite or titanomagnetite selecting and purchasing obtain.Usually FeTiO in raw ore
3grade lower, generally need to carry out enrichment through methods such as gravity treatment, magnetic separation and FLOTATION SEPARATION.Due to through ore dressing process ilmenite concentrate containing have an appointment 10% moisture, if do not carry out dehydration pretreatment in advance, then can cause the problems such as subsequent handling capacity usage ratio is low, financial cost is high, discharge amount of exhaust gas is large, bring very large pressure to subsequent technique.Therefore, need flotation ilmenite concentrate to carry out dehydrating process.
At present, the drying mode of known flotation ilmenite concentrate mainly contains rotary kiln drying and microwave drying.Rotary kiln drying is contacted with high-temperature flue gas by aqueous titanium concentrate and carries out drying.This drying mode flotation ilmenite concentrate enters in kiln by rotary kiln one end, in kiln in motion process by heat drying, finally discharged by kiln body other end bottom discharging opening.Although rotary kiln drying has that output is large, device structure is simple and the advantage such as easy to operate, there is operating cost high, the problems such as environmental pollution is serious.As in the flotation ilmenite concentrate drying that patent CA102445057A provides because material turning and blasting of hot blast cause rotary kiln drying process to produce a large amount of dust, these dust enter bag collection system with water vapour often to be caused condensing in pipeline and dust-precipitator, sticking with paste bag, need the cloth bag that gathers dust be regularly replaced, cause drying cost greatly to increase.In addition, ilmenite concentrate remains a large amount of organic floating agents through flotation rear surface, and these floating agents are highly volatile Sum decomposition under the high temperature conditions, thus produces strong impulse gas, causes severe contamination to environment.Microwave drying is as a kind of novel, green drying mode, and the plan of its effective heating target mainly minute quantity removes moisture, decreases and heats the entirety of material, significantly reduce energy consumption, effectively prevent the discharge of greenhouse gases and pollutant.Meanwhile, due to material surface water evaporates, surface temperature is caused to reduce; Thus cause a low inside and high outside thermograde, the direction of this gradient is just in time consistent with the direction of water evaporates, so ultrahigh in efficiency.As in the ilmenite concentrate research that Li Yu etc. carries out, the ilmenite concentrate of moisture 10% can be dried to 2% after 150 seconds by heating using microwave.Although the microwave drying of ilmenite concentrate shows, speed is fast, drying efficiency advantages of higher, but the microwave drying of ilmenite concentrate is only limitted to laboratory stage at present, not yet has the technological process control being suitable for large-scale production.Therefore, novel, efficient low temperature, clean new drying technique and new technology under the long distance of exploitation, high load capacity, large discharge condition have great importance.
Summary of the invention
For overcoming the deficiencies in the prior art, the present invention proposes a kind of equipment and application of microwave drying ilmenite concentrate, is a kind of efficient, clean drying means grown under distance, high load capacity, large discharge condition.
The structure of the equipment of a kind of microwave drying ilmenite concentrate related to of the present invention comprises three sections of microwave heating equipments, and three sections of microwave heating equipment word orders join end to end and to distribute in staged; Every section of microwave heating equipment comprises belt conveyer and heating using microwave cavity 3, and belt conveyer is through heating using microwave cavity 3; There is vibra feeder 12 one end of the microwave heating equipment of the highest ladder, and the microwave heating equipment of minimum ladder has drawing mechanism 2.
The microwave heating equipment of the highest described ladder has 12 one end of vibra feeder to be provided with bed of material baffle plate 11, and bed of material baffle plate 11 is arranged on the front of the vibra feeder 12 of belt conveyer direction of rotation.
The material inlet of described vibra feeder 12 and the discharging opening of drawing mechanism 2 are all provided with moisture teller 1.
Splice housing 4 is had to connect between described each connected microwave heating equipment.
Heating using microwave cavity 3 on described each microwave heating equipment is provided with magnetron 9 and exhausting airduct 5.Exhausting
Airduct 5 is arranged on and does not distribute in the cavity body 8 of magnetron 9.
The equipment of described whole microwave drying ilmenite concentrate is fixed on mill floor by support 13.
Described belt conveyer is made up of two roller bearings 7 and multiple carrying roller 10, and roller bearing 7 provides power, carrying roller 10
For back-up belt 6.
The application of the equipment of microwave drying ilmenite concentrate of the present invention comprises as follows: belt 6 rotating speed first adjusting three sections of microwave heating equipments is 5 ~ 10m/min, the power 550 ~ 1000KW of first paragraph microwave heating equipment, the exhausting amount of exhausting airduct 5 is 400 ~ 750 m
3/ h, the power 450 ~ 800KW of second segment microwave heating equipment, the exhausting amount of exhausting airduct 5 are 500 ~ 950 m
3/ h, the power 350 ~ 600KW of the 3rd section of microwave heating equipment, the exhausting amount of exhausting airduct 5 are 350 ~ 550 m
3/ h, then by moisture content be 8 ~ 12wt% ilmenite concentrate by vibra feeder 12 paving send on belt 6, the thickness being adjusted ilmenite concentrate by bed of material baffle plate 11 is 1 ~ 5cm, finally obtains from the drawing mechanism 2 of the microwave heating equipment of minimum ladder the dry ilmenite concentrate that moisture content is less than 1wt%.
Described ilmenite concentrate be floatation obtain containing TiO
2the mineral aggregate of 35 ~ 63wt%.
Described ilmenite concentrate deviates from 30 ~ 55wt% water of water content ilmenite concentrate after the drying of first paragraph microwave heating equipment,
Deviate from the water of 70 ~ 90wt% of water content in ilmenite concentrate after the drying of second segment microwave heating equipment, after the 3rd section of microwave heating equipment drying, deviate from the water of 90 ~ 100wt% of water content in ilmenite concentrate.
Technological principle of the present invention is that the dielectric constant of water is 78, and the dielectric constant of ilmenite concentrate is relatively little, water absorbs the microwave energy of certainly large number and takes the lead in being removed by selective heating evaporation in microwave field, decreases and heats the entirety of material, significantly reduce energy consumption.In addition lower than under 80 DEG C of baking temperatures, ilmenite concentrate adsorption floating agent there is not the Sum decomposition that volatilizees, efficiently solve the pollution problem of the environment that rotary kiln drying ilmenite concentrate brings.In addition, by the rational three sections of staggers of microwave equipment and ladder section dynamic stirring secondary material distributing mode, thus not only realize the scale continuous seepage under long distance, high load capacity, large discharge condition, and improve drying efficiency, reduce energy consumption.
The present invention has the following advantages:
(1) this method controls microwave power, and exhausting amount, makes flotation ilmenite concentrate complete drying at a lower temperature, avoids floating agent volatilization Sum decomposition under the high temperature conditions, environmental friendliness;
(2) eliminate rotary kiln drying dust with water vapour enter bag collection system cause in pipeline and dust-precipitator condense, stick with paste bag, drying cost increases attenuating greatly;
(3) adopt three sections of staged dryings to arrange, achieve the scale continuous seepage under long distance, high load capacity, large discharge condition;
(4) magnetron adopts cooling by water, improves service life, ensures the stability that microwave power exports to avoid the decay of microwave power.
Accompanying drawing explanation
Fig. 1 is microwave dryer schematic diagram of the present invention.
In figure, each label is: 1-moisture teller, 2-drawing mechanism, 3-heating using microwave cavity, 4-splice housing, 5-exhausting airduct, 6-belt, 7-roller bearing, 8-cavity body, 9-magnetron, 10-carrying roller, 11-bed of material baffle plate, 12 vibra feeders, 13-support.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment one: as shown in Figure 1, the device structure of the microwave drying ilmenite concentrate of present embodiment comprises three sections of microwave heating equipments, and three sections of microwave heating equipment word orders join end to end and to distribute in staged; Every section of microwave heating equipment comprises belt conveyer and heating using microwave cavity 3, and belt conveyer is through heating using microwave cavity 3; There is vibra feeder 12 one end of the microwave heating equipment of the highest ladder, and the microwave heating equipment of minimum ladder has drawing mechanism 2.The microwave heating equipment of the highest ladder has 12 one end of vibra feeder to be provided with bed of material baffle plate 11, and bed of material baffle plate 11 is arranged on the front of the vibra feeder 12 of belt conveyer direction of rotation.The material inlet of vibra feeder 12 and the discharging opening of drawing mechanism 2 are all provided with moisture teller 1.Splice housing 4 is had to connect between each connected microwave heating equipment.Heating using microwave cavity 3 on each microwave heating equipment is provided with magnetron 9 and exhausting airduct 5.
Being applied as of the microwave drying ilmenite concentrate equipment of present embodiment: the belt speed first adjusting three sections of microwave heating equipments is 5m/min, the power 550KW of first paragraph microwave heating equipment, the exhausting amount of exhausting airduct 5 is 500 m
3/ h, the power 800KW of second segment microwave heating equipment, the exhausting amount of exhausting airduct 5 are 500 m
3/ h, the power 500KW of the 3rd section of microwave heating equipment, the exhausting amount of exhausting airduct 5 are 350 m
3/ h, then by moisture content be 10wt% ilmenite concentrate (for floatation obtain containing TiO
2the mineral aggregate of 35wt%) send on belt 6 by vibra feeder 12 paving, the thickness being adjusted ilmenite concentrate by bed of material baffle plate 11 is 1cm, finally obtains the dry ilmenite concentrate of moisture content 0.9wt% from the drawing mechanism 2 of the microwave heating equipment of minimum ladder.
Embodiment two: as shown in Figure 1, the device structure of the microwave drying ilmenite concentrate of present embodiment comprises three sections of microwave heating equipments, and three sections of microwave heating equipment word orders join end to end and to distribute in staged; Every section of microwave heating equipment comprises belt conveyer and heating using microwave cavity 3, and belt conveyer is through heating using microwave cavity 3; There is vibra feeder 12 one end of the microwave heating equipment of the highest ladder, and the microwave heating equipment of minimum ladder has drawing mechanism 2.The microwave heating equipment of the highest ladder has 12 one end of vibra feeder to be provided with bed of material baffle plate 11, and bed of material baffle plate 11 is arranged on the front of the vibra feeder 12 of belt conveyer direction of rotation.The material inlet of vibra feeder 12 and the discharging opening of drawing mechanism 2 are all provided with moisture teller 1.Heating using microwave cavity 3 on each microwave heating equipment is provided with magnetron 9 and exhausting airduct 5.
Being applied as of the microwave drying ilmenite concentrate equipment of present embodiment: the belt speed first adjusting three sections of microwave heating equipments is 8m/min, the power 1000KW of first paragraph microwave heating equipment, the exhausting amount of exhausting airduct 5 is 750 m
3/ h, the power 600KW of second segment microwave heating equipment, the exhausting amount of exhausting airduct 5 are 950 m
3/ h, the power 350KW of the 3rd section of microwave heating equipment, the exhausting amount of exhausting airduct 5 are 550 m
3/ h, then by moisture content be 12wt% ilmenite concentrate (for floatation obtain containing TiO
2the mineral aggregate of 50wt%) send on belt 6 by vibra feeder 12 paving, the thickness being adjusted ilmenite concentrate by bed of material baffle plate 11 is 3cm, finally obtains the dry ilmenite concentrate of moisture content 0.6wt% from the drawing mechanism 2 of the microwave heating equipment of minimum ladder.
Embodiment three: as shown in Figure 1, the device structure of the microwave drying ilmenite concentrate of present embodiment comprises three sections of microwave heating equipments, and three sections of microwave heating equipment word orders join end to end and to distribute in staged; Every section of microwave heating equipment comprises belt conveyer and heating using microwave cavity 3, and belt conveyer is through heating using microwave cavity 3; There is vibra feeder 12 one end of the microwave heating equipment of the highest ladder, and the microwave heating equipment of minimum ladder has drawing mechanism 2.The microwave heating equipment of the highest ladder has 12 one end of vibra feeder to be provided with bed of material baffle plate 11, and bed of material baffle plate 11 is arranged on the front of the vibra feeder 12 of belt conveyer direction of rotation.The material inlet of vibra feeder 12 and the discharging opening of drawing mechanism 2 are all provided with moisture teller 1.Splice housing 4 is had to connect between each connected microwave heating equipment.Heating using microwave cavity 3 on each microwave heating equipment is provided with magnetron 9 and exhausting airduct 5.
Being applied as of the microwave drying ilmenite concentrate equipment of present embodiment: the belt speed first adjusting three sections of microwave heating equipments is 10m/min, the power 800KW of first paragraph microwave heating equipment, the exhausting amount of exhausting airduct 5 is 400 m
3/ h, the power 450KW of second segment microwave heating equipment, the exhausting amount of exhausting airduct 5 are 700 m
3/ h, the power 600KW of the 3rd section of microwave heating equipment, the exhausting amount of exhausting airduct 5 are 450 m
3/ h, then by moisture content be 8wt% ilmenite concentrate (for floatation obtain containing TiO
2the mineral aggregate of 63wt%) send on belt 6 by vibra feeder 12 paving, the thickness being adjusted ilmenite concentrate by bed of material baffle plate 11 is 1 ~ 5cm, finally obtains the dry ilmenite concentrate of moisture content 0.8wt% from the drawing mechanism 2 of the microwave heating equipment of minimum ladder.
Below by reference to the accompanying drawings the specific embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (2)
1. an application for microwave drying ilmenite concentrate equipment, is characterized in that: the device structure of this microwave drying ilmenite concentrate comprises three sections of microwave heating equipments, and three sections of microwave heating equipment word orders join end to end and to distribute in staged; Every section of microwave heating equipment comprises belt conveyer and heating using microwave cavity (3), and belt conveyer is through heating using microwave cavity (3); There is vibra feeder (12) one end of the microwave heating equipment of the highest ladder, and the microwave heating equipment of minimum ladder has drawing mechanism (2), and application concrete steps comprise as follows:
First belt (6) rotating speed adjusting three sections of microwave heating equipments is 5 ~ 10m/min, the power 550 ~ 1000KW of first paragraph microwave heating equipment, the exhausting amount of exhausting airduct (5) is 400 ~ 750 m
3/ h, the power 450 ~ 800KW of second segment microwave heating equipment, the exhausting amount of exhausting airduct (5) are 500 ~ 950m
3/ h, the power 350 ~ 600KW of the 3rd section of microwave heating equipment, the exhausting amount of exhausting airduct (5) are 350 ~ 550m
3/ h, then by moisture content be 8 ~ 12wt% ilmenite concentrate by vibra feeder (12) paving send on belt (6), be 1 ~ 5cm by the thickness of bed of material baffle plate (11) adjustment ilmenite concentrate, finally obtain from the drawing mechanism (2) of the microwave heating equipment of minimum ladder the dry ilmenite concentrate that moisture content is less than 1wt%.
2. the application of microwave drying ilmenite concentrate equipment according to claim 1, is characterized in that: described ilmenite concentrate be floatation obtain containing TiO
2the mineral aggregate of 35 ~ 63wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310156362.5A CN103234339B (en) | 2013-05-02 | 2013-05-02 | Device for ilmenite concentrate microwave drying and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310156362.5A CN103234339B (en) | 2013-05-02 | 2013-05-02 | Device for ilmenite concentrate microwave drying and application method thereof |
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| CN103234339A CN103234339A (en) | 2013-08-07 |
| CN103234339B true CN103234339B (en) | 2015-06-03 |
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| CN106643091B (en) * | 2016-11-30 | 2019-02-12 | 尹国祥 | A kind of magnetic mine infared dryer of low energy consumption |
| CN108311290B (en) * | 2018-03-16 | 2019-08-09 | 东北大学 | A kind of method that Microwave Pretreatment improves ilmenite flotation efficiency |
| CN110887343A (en) * | 2019-11-07 | 2020-03-17 | 湖南工业大学 | High-frequency-based wood powder drying device and process thereof |
| CN111337753B (en) * | 2020-03-16 | 2021-07-30 | 昆明理工大学 | Method for adjusting dielectric constant of high-calcium magnesium titanium concentrate under microwave heating condition |
| CN113804000A (en) * | 2020-06-17 | 2021-12-17 | 宝山钢铁股份有限公司 | Microwave and hot waste gas combined heating and drying system and method for blast furnace lump ore |
| CN112484472B (en) * | 2020-11-05 | 2022-05-03 | 合肥三伍机械有限公司 | Infrared drying mechanism |
| CN112683008A (en) * | 2020-12-24 | 2021-04-20 | 天津包钢稀土研究院有限责任公司 | Method for preparing anhydrous rare earth halide by vacuum microwave dehydration |
| TWI754529B (en) * | 2021-01-27 | 2022-02-01 | 永虹先進材料股份有限公司 | Mineral water removal equipment and process |
| CN115265155A (en) * | 2022-06-14 | 2022-11-01 | 金华市农业科学研究院(浙江省农业机械研究院) | Microwave uniform heating tempering equipment for tea seeds |
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