CN103191829B - Screening-heavy-separation combined beneficiation method - Google Patents
Screening-heavy-separation combined beneficiation method Download PDFInfo
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- CN103191829B CN103191829B CN201310119483.2A CN201310119483A CN103191829B CN 103191829 B CN103191829 B CN 103191829B CN 201310119483 A CN201310119483 A CN 201310119483A CN 103191829 B CN103191829 B CN 103191829B
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Abstract
A screening-heavy-separation combined beneficiation method belongs to the technical field of beneficiation. A first-stage screening mesh number S1 is determined, the lowest density value of one or a plurality of types of mine required to be obtained through beneficiation and the highest density value of two types of mine with the highest content in other types of mine are substituted in an empirical formula, and a second-stage screening mesh number S2 actual is obtained. S2 actual-S1 is the width of screening size. A third-stage screening mesh number S3 actual= screening size width+S2 actual, and so forth until the highest screen mesh number of a screening device is obtained. Materials obtained through various stages of screening and having the particle size width as S2 actual-S1 are sent to a heavy separation device to be heavy separated respectively. By means of the method, the weight of the high-density mine particles involved in heavy separation is close to or exceeds the weight of low-density mine particles, and comprehensive stress of the high-density mine particles has advantages. The obtained concentrate grade and concentration recovery ratio are greatly improved, and recovery ratio and concentrate grade are easy to control.
Description
Technical field
The invention belongs to technique of preparing field, be specifically related to a kind of method that can improve the gravity treatment rate of recovery and the concentrate grade that obtains.
Background technology
Gravity treatment is the beneficiation method of environmental protection, is also the minimum beneficiation method of cost up to the present.Before about 400 years, just there is the most original gravitational separation equipment jigging machine.As time goes on, successively there are A. Weir expense profit, I.B. Han Feilai, a series of scholars such as Lei Tingzhi have carried out research extensively and profoundly to reuse adoption process, and have set up by mineral density is poor and carried out the theory system that layering divides band, and research and development produce corresponding gravitational separation equipment.There is in theory dynamics and statics Liang great group in gravity treatment now.Applicant is found in repetition test research process, the research work core of two theoretical groups all excessively focuses on by mineral density is poor carries out layering and divides band, and ignored in the time that existing gravitational separation equipment runs well, the suffered size of making a concerted effort of various mineral grains, directly depends on these two key factors of weight and volume of stressed particle.This causes for a long time under existing theoretical direction, adopt water to rush case, when the equipment such as cloud tin formula classification case, spiral classifier, screening carry out the classification before gravity treatment, do not carry out classification by density contrast, classification can be complied with without certificate, cause that grade is too wide or classification boundary line is unclear, can not prepare and be suitable for other material of sorting particle size fraction most, thereby can not fully improve the rate of recovery and the concentrate grade of gravity treatment.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, a kind of beneficiation method that can improve the gravity treatment rate of recovery and the concentrate grade that obtains is provided, be i.e. the beneficiation method of screening-gravity treatment associating
The inventive method is carried out according to the following steps:
1, determine concrete title and the content thereof of the contained various mineral of material to be selected, said mineral, including gangue, and obtain their density values separately here;
2,, according to the value of various mineral and content, determine one or more mineral that need ore dressing to obtain;
3, by the monomer dissociation granularity that becomes ore deposit embedding cloth particle in broken ore grinding, or treat the further granularity of the concentrate of separation, determine the grit number S of first order screening sieve surface
1, material is carried out to first order screening;
4, by a density value ρ minimum in the mineral that need ore dressing to obtain
1, and the density value ρ of that mineral of density maximum in two kinds of mineral that in other mineral, content is the highest
2the following empirical equation of substitution, obtain the grit number S2 of second level screening sieve surface in theory:
S
2=（ρ
1÷ρ
2）×S
1
5, by the S of upper step gained
2the following formula of substitution is tried to achieve the grit number S of the second level screening sieve surface of actual employing
2 is real: S
2 is real=S
2± D, D is experiential modification coefficient,
In the time of selection+D, span is 0 < D≤(S
2-S
1) × 50%,
In the time of selection-D, span is 0≤D < (S
2-S
1),
Selection+D suitably relaxes ore dressing granularity rank, in the time that recovery rate in ore-dressing and the concentrate grade obtaining are all less demanding, adopts,
When selection-D suitably tightens up ore dressing granularity rank, in the time that all having relatively high expectations with the concentrate grade obtaining, recovery rate in ore-dressing adopts,
Material by first order screening sieve surface is carried out to second level screening;
6, S
2 is real-S
1for screen size width, the grit number S of third level screening sieve surface
3 is real=screen size width+S
2 is real, the material by second level screening sieve surface is carried out to third level screening;
The rest may be inferred, until reach the highest grit number of screening plant;
7, granularity is less than to S
1be greater than S
2 is real, be less than S
2 is realbe greater than S
3 is real, be less than S
3 is realbe greater than S
4 is real.., material, namely screening gained granularity width at different levels are S
2 is real-S
1material, send into respectively gravitational separation equipment and carry out gravity treatment.
Density value ρ
1and ρ
2density unit should be identical.
Said material to be selected can, for containing the rough of gangue, can be also the concentrate containing two or more mineral.Saidly determine concrete title and the content thereof of the contained various mineral of material to be selected, the approach that obtains their density values is separately prior art, for example can be by looking into ore dressing handbook, mineral electronic databank or being drawn the density value of concrete mineral by experimental determination.Screening plant and gravitational separation equipment can use existing various relevant device.
The inventive method is that the weight that fully takes into account sorted materials particle is to improve the greatest factor of the gravity treatment rate of recovery and the concentrate grade that obtains, the weight of high density mineral grain of gravity treatment of letting on to try one's best approaches or exceedes the weight of low-density mineral grain, thus make high density mineral grain comprehensive stressedly there is advantage.
The inventive method is not only applicable to the rough gravity treatment containing gangue, is also applicable to the further Gravity separation to concentrate.
Beneficial effect of the present invention: adopt the inventive method gravity treatment, the more existing reselecting method of the grade of gained concentrate and recovery rate in ore-dressing significantly improves, and can determine as required the correction factor value adopting, to control the rate of recovery and concentrate grade.
Detailed description of the invention
Embodiment 1 carries out according to the following steps:
1, material to be selected is the plumbous zinc ore that originates from the Lan Pingxian of Yunnan Province, containing galena 0.6%(percentage by weight, as follows), density 7.5g/cm
3; Cerussite 0.4%, density 6.5g/cm
3; Zinc carbonate 7.8%, density 4.5g/cm
3; Zincblende 4.19%, density 3.9g/cm
3; Zinc silicate 0.43%, density 4.1g/cm
3; Zinc ferrite 1.73%, density 5.2g/cm
3; Limonite 6.8%, density 4.2g/cm
3; Celestine 2.41%, density 3.87g/cm
3; Barite 2.1%, density 4.7g/cm
3; Quartz 47.88%.Density 2.6g/cm
3; Limestone 25.66%, density 2.9g/cm
3.
2, determine that need to carry out ore dressing obtains mineral and be: galena, cerussite, zinc carbonate, zincblende, zinc silicate, zinc ferrite.
3, determine the grit number S of first order screening sieve surface
1be 100, material is carried out to first order screening;
4, zincblende density density value ρ 1=3.9g/cm
3, and the density value ρ of that mineral of density maximum in two kinds of mineral that in other mineral, content is the highest
2=2.9g/cm
3the following empirical equation of substitution, obtains the grit number S of second level screening sieve surface in theory
2:
S
2=（ρ
1÷ρ
2）×S
1=（3.9÷2.9）×100≈135
5, the following formula of 135 substitution is tried to achieve to the grit number S of the second level screening sieve surface of actual employing
2 is real:
S
2 is real=135+D, D gets 15, S
2 is real=150.
Material by first order screening sieve surface is carried out to second level screening;
5, S
2 is real-S
1=150-100=50 is screen size width, determines the grit number S of the 3rd utmost point screening sieve surface by this screen size width
3 is real=50+150=200, carries out third level screening to the material by second level screening sieve surface.
6, the grit number S of the 4th utmost point screening sieve surface
4 is real=50+200=250, carries out fourth stage screening to the material by third level screening sieve surface.
7, the grit number S of the 5th utmost point screening sieve surface
5 is real=50+250=300, carries out level V screening to the material by fourth stage screening sieve surface.
8, the grit number S of sextupole screening sieve surface
6 is real=50+300=350, carries out the 6th grade of screening to the material by level V screening sieve surface.
9, the grit number S of the 7th utmost point screening sieve surface
7 is real=50+350=400, to carrying out the 7th grade of screening by the material of the 6th grade of screening sieve surface.
4, by granularity at 100-150,150-200,200-250,250-300,300-350, the material of 350-400 sieve mesh is sent into respectively shaking table and is carried out gravity treatment.
Total zinc recovery is 85%, and lead recovery is 90%.The grade of 6 mixed zinc of concentrate of gained is 15%, and plumbous grade is 12%.
As a comparison, identical plumbous zinc ore material to be selected, granularity is 100～400 orders, carries out gravity treatment with identical shaking table, and zinc recovery is 40%, and lead recovery is 55%.In gained concentrate, the grade of zinc is 13%, and plumbous grade is 10%.
Embodiment 2 carries out according to the following steps:
1, material to be selected is the lead ore that originates from Yunlong County, Yunnan Province, containing galena 2.5%, and density 7.5g/cm
3; Cerussite 2.8%, density 6.6g/cm
3; Sardinianite 2%, density 6.1g/cm
3; Quartz 85%, density 2.6g/cm
3; Calcium carbonate 7.7%, density 2.9g/cm
3.
2, determine that need to carry out ore dressing obtains mineral and be: galena, cerussite and sardinianite.
3, determine the grit number S of first order screening sieve surface
1be 120, material is carried out to first order screening;
4, sardinianite density value ρ 1=6.1g/cm
3, and the density value ρ 2=2.9g/cm of that mineral of density maximum in other two kinds of mineral
3the following empirical equation of substitution, obtains the grit number S of second level screening sieve surface in theory
2=(ρ
1÷ ρ
2) × S
1=(6.1 ÷ 2.9) × 120 ≈ 252.
5, try to achieve the grit number S2 reality of the second level screening sieve surface of actual employing:
S
2 is real=252-D, D gets 22, S
2 is real=230.
6, S
2 is real-S
1=230-120=110 is screen size width, determines the grit number S of the 3rd utmost point screening sieve surface by this screen size width
3 is real=110+230=340, carries out third level screening to the material by second level screening sieve surface.
Be 2 materials of 110 object by above-mentioned screening gained granularity width, send into respectively spiral chute and carry out gravity treatment.
Total lead recovery is 92%, and the grade of 2 mixed lead of concentrate of gained is 48%.
As a comparison, identical lead ore, granularity is 120～340 orders, carries out gravity treatment with same-handed chute, and lead recovery is 68%, and the plumbous grade of gained concentrate is 32%.
Embodiment 3 carries out according to the following steps:
1, material to be selected is the lead and zinc concentrate of flotation gained, containing galena 15%, and density 7.5g/cm
3; Troilite 15%, density 4.8g/cm
3; Zinc sulphide 52%, density 3.9g/cm
3; Quartz 10%, density 2.6g/cm
3; Calcite 8%, density 2.7g/cm
3.
2, determine and need to carry out further separating that to obtain mineral be galena.
3, determine the grit number S of first order screening sieve surface
1be 180, material is carried out to first order screening;
4, galena density value ρ
1=7.5g/cm
3, and the density value ρ of troilite
2=4.8g/cm
3the following empirical equation of substitution, obtains the grit number S of second level screening sieve surface in theory
2=(ρ
1÷ ρ
2) × S
1=(7.5 ÷ 4.8) × 180 ≈ 280.
5, try to achieve the grit number S2 reality of the second level screening sieve surface of actual employing:
S
2 is real=280-D, D is taken as 20, S
2 is real=260.
6, S
2 is real-S
1=260-180=80 is screen size width, determines the grit number S of the 3rd utmost point screening sieve surface by this screen size width
3 is real=80+260=340, carries out third level screening to the material by second level screening sieve surface.
Be 2 materials of 80 object by above-mentioned screening gained granularity width, send into respectively shaking table and carry out gravity treatment.
Total lead recovery is 96%, and the grade of the mixed lead of concentrate of 2 further selected separation of gained is 52%.
As a comparison, identical lead and zinc concentrate, granularity is 180～340 orders, carries out gravity treatment with identical shaking table, and lead recovery is 60%, and the plumbous grade of gained concentrate is 45%.
Embodiment 3 is in fact lead, the zinc in separation of lead zinc concentrate.
Only the present invention is further illustrated for above embodiment, but the invention is not restricted to described in embodiment.
Claims (3)
1. a beneficiation method for screening-gravity treatment associating, is characterized in that carrying out according to the following steps:
(1), determine concrete title and the content thereof of the contained various mineral of material to be selected, said mineral, including gangue, and obtain their density values separately;
(2), according to the value of various mineral and content, determine need ore dressing to obtain one or more mineral;
(3) the monomer dissociation granularity, by one-tenth ore deposit embedding cloth particle in broken ore grinding, or treat the further granularity of the concentrate of separation, determine the grit number S of first order screening sieve surface
1, material is carried out to first order screening;
(4), by a density value ρ minimum in the mineral that need ore dressing to obtain
1, and the density value ρ of that mineral of density maximum in two kinds of mineral that in other mineral, content is the highest
2the following empirical equation of substitution, obtains the grit number S of second level screening sieve surface in theory
2:
S
2=（ρ
1÷ρ
2）×S
1
(5), by the S of upper step gained
2the following formula of substitution is tried to achieve the grit number S of the second level screening sieve surface of actual employing
2 is real: S
2 is real=S
2± D, D is experiential modification coefficient,
In the time of selection+D, span is 0 < D≤(S
2-S
1) × 50%,
In the time of selection-D, span is 0≤D < (S
2-S
1),
Material by first order screening sieve surface is carried out to second level screening;
(6), S
2 is real-S
1for screen size width, the grit number S of third level screening sieve surface
3 is real=screen size width+S
2 is real, the material by second level screening sieve surface is carried out to third level screening,
The rest may be inferred, until reach the highest grit number of screening plant;
(7) be, S by screening gained granularity width at different levels
2 is real-S
1material, send into respectively gravitational separation equipment and carry out gravity treatment;
Density value ρ
1and ρ
2density unit identical.
2. the beneficiation method that screening-gravity treatment is combined as claimed in claim 1, is characterized in that said beneficiation method is for the rough gravity treatment containing gangue.
3. the beneficiation method that screening-gravity treatment is combined as claimed in claim 1, is characterized in that said beneficiation method is for the further Gravity separation to concentrate.
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| CN106994387B (en) * | 2017-05-05 | 2020-06-23 | 深圳市中金岭南科技有限公司 | Multiple layering, zoning and screening reselection method |
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2013
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Patent Citations (4)
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|---|---|---|---|---|
| JP3189413B2 (en) * | 1992-09-10 | 2001-07-16 | トヨタ自動車株式会社 | Metal sorting and recovery equipment for waste |
| CN1618522A (en) * | 2003-11-21 | 2005-05-25 | 孔繁逸 | Method for sorting raw menakanite |
| CN101229526A (en) * | 2007-12-13 | 2008-07-30 | 攀枝花环业冶金渣开发有限责任公司 | Method of using blast furnace scrap iron in slag to prepare puron materiel |
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| Title |
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| 孙锡丽等.进口铁矿石目级粒度筛分方法的探讨.《矿业快报》.2004,(第12期),第22-23页. |
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| 陈清如.概率筛分的理论和应用.《筛分和重选理论及其应用的新进展》.中国矿业大学出版社,1994,(第1版),第14-25页. * |
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Effective date of registration: 20200812 Address after: 650000 small garden No. 148, 4, building 8, unit 301, Yunnan, Kunming Patentee after: Li Kuangmiao Address before: 650000 small garden No. 148, 4, building 8, unit 301, Yunnan, Kunming Co-patentee before: Li Kuangmiao Patentee before: Yang Jiading |
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