CN101716439A - Method for dehydrating micro-particle slurry - Google Patents
Method for dehydrating micro-particle slurry Download PDFInfo
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- CN101716439A CN101716439A CN200910243371A CN200910243371A CN101716439A CN 101716439 A CN101716439 A CN 101716439A CN 200910243371 A CN200910243371 A CN 200910243371A CN 200910243371 A CN200910243371 A CN 200910243371A CN 101716439 A CN101716439 A CN 101716439A
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- 239000002002 slurry Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000011859 microparticle Substances 0.000 title claims abstract description 41
- 230000018044 dehydration Effects 0.000 claims abstract description 32
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 32
- 238000001914 filtration Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 11
- 230000008719 thickening Effects 0.000 claims abstract description 4
- 238000004062 sedimentation Methods 0.000 claims description 22
- 239000008187 granular material Substances 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 8
- 238000004886 process control Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 3
- 239000011707 mineral Substances 0.000 abstract description 3
- 239000010419 fine particle Substances 0.000 abstract 2
- 239000011362 coarse particle Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 14
- 239000012065 filter cake Substances 0.000 description 12
- 239000002562 thickening agent Substances 0.000 description 7
- 239000004503 fine granule Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000010148 water-pollination Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention relates to a method for dehydrating micro- particle slurry, in particular to a method for dehydrating the micro-particle products, which is suitable for ore-dressing practice. The method comprises the processes of grading, sedimentating and filtering. The method is characterized in that the micro-particle slurry is graded firstly in the dehydration process to obtain the particle slurry and fine particle slurry, wherein the coarse particle slurry is sedimentated via a thickening machine, and then is filtered by using a micropore material or device. After the fine particle slurry is sedimentated, a membrane chamber-type filter press or a centrifugal hydroextractor is used to dehydrate and filter. The method is easy and simple, solves the problems of low productive capacity of filtering the micro-sized particle slurry and enhances the sedimentating and filtering performance of the micro-sized particle slurry and the moisture of a filter mass so as to greatly reduce the energy consumption of metallurgy and the mineral separation cost.
Description
Technical field
The present invention relates to a kind of dewatering of micro-particle slurry, relate in particular to a kind of dewatering of suitable ore-dressing practice microfine product.
Background technology
Fine granule material typically refers to the particle of particle diameter below 38 μ m, because its fine size, specific area is big, has very strong hydrophily, and dewatering and filtering is very difficult.The dewatering and filtering of fine granule material, in ore dressing, chemical industry, building materials, hydrometallurgy and sewage disposal process, be the process procedure of wanting very much, in ore dressing field, along with continually developing of mineral resources, a large amount of rich ores gradually reduce, and utilizing of lean ore and some difficult ores is extremely urgent.Because the embedding cloth complexity of these ores will fully utilize and must carry out fine grinding, thereby reach effective monomer dissociation, along with the mog of ore improves gradually, microfine content increases sharply.Because its fine size, specific area is big, has very strong hydrophily, and dewatering and filtering is very difficult.How to solve effectively that the dehydration problem of microfine product seems very outstanding after the sorting.
The dewatering process of micro-particle slurry is mainly finished by sedimentation and filtration twice dehydration.Prior art is for effective sedimentation, normally adopt and add flocculant, in Hhigh-efficient thickener, carry out flocculating setting, pulp density is brought up to 40%-60%, adopt ceramic filter, filter press, filter plants such as upright disk filter, centrifugal dehydrator or microporous filter that it is filtered then.Yet still there are many problems in single filter plant when handling micro-particle slurry:
1. ceramic filter has higher requirement to concentration, granularmetric composition, viscosity and the pH value of material.The ceramic filter speculative investment is big, and filter plate stops up easily, causes production capacity to decay rapidly, needs often to clean, and labor strength is excessive.
2. filter press specific energy consumption and operating cost are higher, can not produce continuously.
3. it is unclean that the filter of upright disk filter fan easily stops up, filter efficiency is low, filter cake comes off, and needs the workman to shovel the filter cake that does not come off with scraper, and damage filter cloth easily.
4. microporous filter washings consumption is big, and filter cake moisture is higher.
Single dehydration equipment is because relatively poor to adaptability to raw material, and still there is certain problem in the dehydration of fine granule material widely for size distribution, needs more to take all factors into consideration from technology and equipment two aspects.The dewatering and filtering operation of fine granule material is the important step of processing operation of contact mineral and metallurgical production, and the moisture content of filter cake directly has influence on the energy consumption of metallurgical production, and then influences production cost, and its output directly has influence on the production of metallurgical industry.The filter material moisture content height of micro-particle slurry, the low bottleneck problem that has become restriction metallurgical industry development of production capacity.Therefore, select to be fit to the dewatering process and the equipment of fine granule material, reduction filter cake moisture, raising are filtered production capacity and are seemed extremely important.
Summary of the invention
The objective of the invention is the deficiency that causes aspects such as strainability is not good owing to subparticle is meticulous that exists at above-mentioned prior art, provide a kind of and can effectively improve the filtration production capacity, reduce production costs and the dewatering of energy consumption, simple, workable suitable micro-particle slurry.
The objective of the invention is to be achieved through the following technical solutions.
A kind of micro-particle slurry dehydration method comprises classification, sedimentation and filter process; It is characterized in that its dehydration at first carries out classification with micro-particle slurry, obtain coarse granule slurries and fine grained slurries respectively, coarse granule slurries wherein adopt micropore material or equipment to filter after adopting the concentrator sedimentation again; The fine grained slurries adopt diaphragm filter press or centrifugal dehydrator to carry out dewatering and filtering after adopting the subsider sedimentation again.
A kind of micro-particle slurry dehydration method of the present invention is characterized in that described micro-particle slurry being carried out classification process, obtains respectively in the coarse granule slurries accounting for more than 60% greater than the content of 10 microns particle; Content less than 10 microns particle in the fine grained slurries accounts for more than 50%.
A kind of micro-particle slurry dehydration method of the present invention is characterized in that described micro-particle slurry is carried out classification process is one section or two sections grading technologies, and classifying equipoment is hydrocyclone, base cone grader, incline board concentrating box or high frequency shale shaker recklessly.
A kind of micro-particle slurry dehydration method of the present invention, it is characterized in that described micro-particle slurry is carried out the coarse granule slurries that the classification process classification goes out is to adopt the thickening equipment sedimentation to dewater in advance earlier, adopt ceramic filter, upright disk filter or microporous filter filtering means dehydration again; The fine grained slurries are to adopt the high rate settling sedimentation earlier, adopt diaphragm filter press or centrifugal dehydrator filtering means dehydration again.
The dewatering of a kind of micro-particle slurry of the present invention, it is characterized in that the fine grained slurries adopt the diaphragm filter press filter process, the control feed pressure is 0.5-1MPa, expressing process control squeeze pressure is 0.8-1.6MPa, squeezing 5-30min, pressure-air blowback process control blowback pressure is 0.3-0.8MPa, blowback 2-36min.
The dewatering of a kind of micro-particle slurry of the present invention is particularly useful for the dewatering of micro-particle slurry product in the ore dressing process.Because the micro-particle slurry product is carried out classification, to avoid owing to the obstruction of subparticle filter, cause the production capacity of filter to reduce, need frequent cleaning and filtering medium, increase treatment process, shorten the defectives such as life cycle of filter medium, thereby the sedimentation of micro-particle slurry product and strainability and filter cake moisture are significantly improved, thereby reduce metallurgical production energy consumption and beneficiation cost greatly.
Description of drawings
Fig. 1 is the process chart of the inventive method.
The specific embodiment
A kind of micro-particle slurry dehydration method, its dehydration is at first carried out classification with micro-particle slurry, obtains coarse granule slurries and fine grained slurries respectively, and coarse granule slurries wherein adopt micropore material or equipment to filter after adopting the concentrator sedimentation again; The fine grained slurries adopt diaphragm filter press or centrifugal dehydrator to carry out dewatering and filtering after adopting the subsider sedimentation again.
A kind of micro-particle slurry dehydration method of the present invention, its micro-particle slurry carries out classification process, obtains respectively in the coarse granule slurries accounting for more than 60% greater than the content of 10 microns particle; Content less than 10 microns particle in the fine grained slurries accounts for more than 50%.
A kind of micro-particle slurry dehydration method of the present invention, it carries out classification process with micro-particle slurry is one section or two sections grading technologies, classifying equipoment is hydrocyclone, Hu base cone grader, incline board concentrating box or high frequency shale shaker.
It is to adopt the thickening equipment sedimentation to dewater in advance earlier that a kind of micro-particle slurry dehydration method of the present invention, micro-particle slurry are carried out the coarse granule slurries that the classification process classification goes out, and adopts ceramic filter, upright disk filter or microporous filter filtering means dehydration again; The fine grained slurries are to adopt the high rate settling sedimentation earlier, adopt diaphragm filter press or centrifugal dehydrator filtering means dehydration again.
The dewatering of a kind of micro-particle slurry of the present invention, the fine grained slurries adopt the diaphragm filter press filter process, the control feed pressure is 0.5-1MPa, expressing process control squeeze pressure is 0.8-1.6MPa, squeezing 5-30min, pressure-air blowback process control blowback pressure is 0.3-0.8MPa, blowback 2-36min.
Embodiment 1
Certain bauxite concentrate selection of concentration 10% adopts the incline board concentrating box classification of band agitating device.+ 10 μ m content are that 82% coarse granule concentrate adopts the ceramic filter filtering means dehydration after Hhigh-efficient thickener brings up to 65% with concentration, ceramic filter disc rotation speed 0.375r/min, filter pressure-0.9MPa, lautertuns liquid level 300mm, 22 ℃ of slurry temperatures filter production capacity by original 210kg/m
2H brings up to 442kg/m
2H, filter cake moisture 11.2%.-10 μ m content are that 86% fine grained concentrate is under the condition of pH=5.6, concentrate through the Hhigh-efficient thickener sedimentation, concentration is brought up to 44% back and is adopted the diaphragm filter press filtering means dehydration, feed pressure is 0.85MPa, squeeze pressure is 1.5MPa, and press filtration 8min, high-pressure air pressure are 0.4-0.6MPa, blowback 3min, filter cake moisture content 18.3%.
Embodiment 2
Certain iron ore concentrate of concentration 12% adopts the secondary hydroclone classification.+ 10 μ m content are that 85% coarse granule concentrate concentrates through the Hhigh-efficient thickener sedimentation, concentration is brought up to 72% back and is adopted the microporous filter filtering means dehydration, filtration time 7-12min, filter pressure 0.05-0.12MPa, dry up air pressure 0.1-0.15MPa, dry up time 15min, filter production capacity and bring up to 590kg/m by original 300kg/m2h
2H, filter cake moisture 8.6%.-10 μ m content are that 90% fine grained concentrate concentrates through the Hhigh-efficient thickener sedimentation, concentration is brought up to 48% back and is adopted the diaphragm filter press filtering means dehydration, feed pressure is 0.75MPa, feed 1.5min, squeeze pressure is 1.2MPa, and press filtration 6.5min, high-pressure air pressure are 0.4-0.6MPa, blowback 5min, filter cake moisture content 11.6%.
Embodiment 3
Certain bauxite concentrate selection of concentration 15%, classification under the hydrocyclone effect.+ 10 μ m content be 76% coarse granule concentrate under the condition of pH=7.4, concentrate through the Hhigh-efficient thickener sedimentation, concentration is brought up to 67% back and is adopted the vertical-disk filter filtering means dehydration, vacuum 0.38MPa filters production capacity by original 210kg/m
2H brings up to 480kg/m
2H, filter cake moisture 11.6%.The fine grained concentrate that-10 μ m content 81% are is under the condition of pH=5.4, concentrate through the Hhigh-efficient thickener sedimentation, concentration is brought up to 53% back and is adopted horizontal spiral centrifugal dehydrator filtering means dehydration, and the rotary drum rotating speed is 1200r/min, the pusher differential of spiral is at 15r/min, filter cake moisture content 17.8%.
Claims (5)
1. a micro-particle slurry dehydration method comprises classification, sedimentation and filter process; It is characterized in that its dehydration at first carries out classification with micro-particle slurry, obtain coarse granule slurries and fine grained slurries respectively, coarse granule slurries wherein adopt micropore material or equipment to filter after adopting the concentrator sedimentation again; The fine grained slurries adopt diaphragm filter press or centrifugal dehydrator to carry out dewatering and filtering after adopting the subsider sedimentation again.
2. a kind of micro-particle slurry dehydration method according to claim 1 is characterized in that described micro-particle slurry being carried out classification process, obtains respectively in the coarse granule slurries accounting for more than 60% greater than the content of 10 microns particle; Content less than 10 microns particle in the fine grained slurries accounts for more than 50%.
3. a kind of micro-particle slurry dehydration method according to claim 1, it is characterized in that described micro-particle slurry is carried out classification process is one section or two sections grading technologies, classifying equipoment is hydrocyclone, base cone grader, incline board concentrating box or high frequency shale shaker recklessly.
4. a kind of micro-particle slurry dehydration method according to claim 1, it is characterized in that described micro-particle slurry is carried out the coarse granule slurries that the classification process classification goes out is to adopt the thickening equipment sedimentation to dewater in advance earlier, adopt ceramic filter, upright disk filter or microporous filter filtering means dehydration again; The fine grained slurries are to adopt the high rate settling sedimentation earlier, adopt diaphragm filter press or centrifugal dehydrator filtering means dehydration again.
5. the dewatering of a kind of micro-particle slurry according to claim 1, it is characterized in that the fine grained slurries adopt the diaphragm filter press filter process, the control feed pressure is 0.5-1MPa, expressing process control squeeze pressure is 0.8-1.6MPa, squeezing 5-30min, pressure-air blowback process control blowback pressure is 0.3-0.8MPa, blowback 2-36min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910243371A CN101716439A (en) | 2009-12-18 | 2009-12-18 | Method for dehydrating micro-particle slurry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910243371A CN101716439A (en) | 2009-12-18 | 2009-12-18 | Method for dehydrating micro-particle slurry |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879384A (en) * | 2010-07-15 | 2010-11-10 | 云南大红山管道有限公司 | Process method for high-floater and small-granularity demineralization in iron concentrate transportation |
| CN102407049A (en) * | 2011-09-14 | 2012-04-11 | 鞍钢集团矿业公司 | Multistage-combined filtering method for hematite concentrate |
| CN102515217A (en) * | 2011-11-18 | 2012-06-27 | 中国铝业股份有限公司 | Method for adding lime to alumina produced by adopting ore-dressing Bayer process |
| CN102614710A (en) * | 2012-04-26 | 2012-08-01 | 鞍钢集团矿业公司 | Filtering process of concentrate in stage concentration flow |
| CN102671492A (en) * | 2012-04-12 | 2012-09-19 | 吕庆淮 | Method for completely recycling compound fertilizer granulation tail gas |
| CN102758077A (en) * | 2012-07-13 | 2012-10-31 | 河南东大矿业股份有限公司 | Equipment capable of reducing bauxite ore dressing concentrate moisture and well forming concentrate filter cake |
| CN103816700A (en) * | 2014-02-18 | 2014-05-28 | 连云港海蓝研磨材料有限公司 | Fast energy-saving dewatering and dehumidifying method of overflow micro powder |
| CN104028041A (en) * | 2014-07-04 | 2014-09-10 | 中国海诚工程科技股份有限公司 | Micro-fine particle liquid and solid separation device |
| CN105363275A (en) * | 2014-08-08 | 2016-03-02 | 范思远 | A thickening and dewatering method for tailings and applications thereof |
| CN107596765A (en) * | 2017-11-15 | 2018-01-19 | 中冶北方（大连）工程技术有限公司 | A kind of batch vacuum disk filter and filter method |
| CN107617254A (en) * | 2017-11-15 | 2018-01-23 | 中冶北方（大连）工程技术有限公司 | A kind of pre-classification disk filter and filter method |
| CN110227297A (en) * | 2019-05-29 | 2019-09-13 | 金川集团股份有限公司 | A kind of copper nickel fine fraction concentrate pulp dewatering process |
| CN115501689A (en) * | 2022-09-21 | 2022-12-23 | 江苏中复神鹰碳纤维工程中心有限公司 | Continuous grading and collecting method for micron-sized particles dispersed in slurry |
| CN115921488A (en) * | 2022-04-27 | 2023-04-07 | 昆明理工凯吉思科技有限公司 | Recovery system and method for fine-grained bauxite |
-
2009
- 2009-12-18 CN CN200910243371A patent/CN101716439A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101879384A (en) * | 2010-07-15 | 2010-11-10 | 云南大红山管道有限公司 | Process method for high-floater and small-granularity demineralization in iron concentrate transportation |
| CN101879384B (en) * | 2010-07-15 | 2012-07-18 | 云南大红山管道有限公司 | Process method for high-floater and small-granularity demineralization in iron concentrate transportation |
| CN102407049A (en) * | 2011-09-14 | 2012-04-11 | 鞍钢集团矿业公司 | Multistage-combined filtering method for hematite concentrate |
| CN102407049B (en) * | 2011-09-14 | 2013-09-04 | 鞍钢集团矿业公司 | Multistage-combined filtering method for hematite concentrate |
| CN102515217A (en) * | 2011-11-18 | 2012-06-27 | 中国铝业股份有限公司 | Method for adding lime to alumina produced by adopting ore-dressing Bayer process |
| CN102671492A (en) * | 2012-04-12 | 2012-09-19 | 吕庆淮 | Method for completely recycling compound fertilizer granulation tail gas |
| CN102614710A (en) * | 2012-04-26 | 2012-08-01 | 鞍钢集团矿业公司 | Filtering process of concentrate in stage concentration flow |
| CN102758077A (en) * | 2012-07-13 | 2012-10-31 | 河南东大矿业股份有限公司 | Equipment capable of reducing bauxite ore dressing concentrate moisture and well forming concentrate filter cake |
| CN103816700A (en) * | 2014-02-18 | 2014-05-28 | 连云港海蓝研磨材料有限公司 | Fast energy-saving dewatering and dehumidifying method of overflow micro powder |
| CN103816700B (en) * | 2014-02-18 | 2016-05-04 | 连云港海蓝研磨材料有限公司 | The energy-conservation dehumanization method that anhydrates fast of a kind of overflow micro mist |
| CN104028041B (en) * | 2014-07-04 | 2015-11-25 | 中国海诚工程科技股份有限公司 | A kind of subparticle liquid-solid separation device |
| CN104028041A (en) * | 2014-07-04 | 2014-09-10 | 中国海诚工程科技股份有限公司 | Micro-fine particle liquid and solid separation device |
| CN105363275A (en) * | 2014-08-08 | 2016-03-02 | 范思远 | A thickening and dewatering method for tailings and applications thereof |
| CN107596765A (en) * | 2017-11-15 | 2018-01-19 | 中冶北方（大连）工程技术有限公司 | A kind of batch vacuum disk filter and filter method |
| CN107617254A (en) * | 2017-11-15 | 2018-01-23 | 中冶北方（大连）工程技术有限公司 | A kind of pre-classification disk filter and filter method |
| CN107596765B (en) * | 2017-11-15 | 2022-11-29 | 中冶北方（大连）工程技术有限公司 | Layered vacuum disc type filter and filtering method |
| CN107617254B (en) * | 2017-11-15 | 2022-11-29 | 中冶北方（大连）工程技术有限公司 | Pre-grading disc type filter and filtering method |
| CN110227297A (en) * | 2019-05-29 | 2019-09-13 | 金川集团股份有限公司 | A kind of copper nickel fine fraction concentrate pulp dewatering process |
| CN115921488A (en) * | 2022-04-27 | 2023-04-07 | 昆明理工凯吉思科技有限公司 | Recovery system and method for fine-grained bauxite |
| CN115501689A (en) * | 2022-09-21 | 2022-12-23 | 江苏中复神鹰碳纤维工程中心有限公司 | Continuous grading and collecting method for micron-sized particles dispersed in slurry |
| CN115501689B (en) * | 2022-09-21 | 2024-01-23 | 中复神鹰碳纤维股份有限公司 | Method for continuously classifying and collecting micron-sized particles dispersed in slurry |
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Open date: 20100602 |