CN102218374A - Method for selectively milling cassiterite multi-metal sulfides ores - Google Patents
Method for selectively milling cassiterite multi-metal sulfides ores Download PDFInfo
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- CN102218374A CN102218374A CN2010101482018A CN201010148201A CN102218374A CN 102218374 A CN102218374 A CN 102218374A CN 2010101482018 A CN2010101482018 A CN 2010101482018A CN 201010148201 A CN201010148201 A CN 201010148201A CN 102218374 A CN102218374 A CN 102218374A
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Abstract
The invention discloses a method for selectively milling cassiterite multi-metal sulfides ores. In the method, by utilizing the hydrophily/hydrophobicity difference between the surface of cassiterite and the surfaces of sulfides ores such as pyrite, pyrrhotite, blende and jamesonite, and by adding a floating agent in a milling process, floatation separation of cassiterite and the sulfides ores in ores can be realized under a condition of larger milling granularity by using a floatation method. The method disclosed by the invention can be adopted for treating the cassiterite multi-metal sulfides ore which contains 0.5 to 1 percent of Sn and 12 to 17 percent of S; and by adopting the method, the ore milling granularity required in floatation can be decreased, the content of fine-grained cassiterite (with the granularity of minus 0.039 millimeter) is reduced by 20 percent, and over-crushing phenomena of cassiterite are greatly reduced.
Description
Technical field
The present invention relates to a kind of cassiterite polymetallic sulphide ore selective milling new method.
Background technology
The main deposit type of China's tin ore is cassiterite-sulfide type mineral deposit, as Geju City, big factory tin ore etc., mainly is distributed in provinces such as Yunnan, Guangxi, Guangdong, Hunan.About 3,840,000 tons of tin ore reserves rank first in the world.Contain tin mineral and comprise cassiterite, stannite, teallite, cylindrite, varlamoffite, brightness antimony nigerite, wall tin ore etc., but cassiterite unique common mineral that are tin metal, in general other tin mineral there is no economic worth.Recovery to the coarse grain tin ore, commonly used is gravity separation method at present, increase along with the exploitation time, rich ore is petered out, on the one hand, the embedding cloth characteristics of tin ore ore are increasingly sophisticated, will have valence component (as sulphide ore etc.) to be placed on the position of equal importance with reclaiming other inevitably in the recovery of cassiterite; On the other hand, because cassiterite is crisp, frangible, this just makes that will inevitably to run into the unvanquishable contradiction-granularity of gravity treatment institute in the technology that reclaims cassiterite too thin.
In the ore dressing process of cassiterite polymetallic sulphide ore, at first sulfide mineral must be adopted the method for flotation deviate from, adopt the method for gravity treatment to reclaim cassiterite again to the ore of having sloughed sulfide mineral, there is a difficult problem how to control the ore grinding particle size in this course, be that sulfide mineral is when adopting the method for flotation to remove, require the ore grinding particle size thinner, so just help the flotation of sulfide mineral, if but the ore grinding particle size is thinner, make cassiterite cross pulverizing, severe exacerbation subsequent reselection technology is unfavorable for that cassiterite reclaims.For this reason, changing traditional grinding process, is the inevitable outcome that effectively reclaims the cassiterite mineral.
In order to improve in the cassiterite polymetallic sulphide ore the particularly difference of the surface hydrophilic/hydrophobic property of pyrite, magnetic iron ore, zincblende and jamesonite of cassiterite surface and sulfide mineral, realize their FLOTATION SEPARATION and don't make cassiterite cross pulverizing, special proposition the present invention.
Summary of the invention
The present invention utilizes the particularly difference of the surface hydrophilic/hydrophobic property of pyrite, magnetic iron ore, zincblende and jamesonite of cassiterite surface and sulfide mineral, and grinding process adds medicament (dispersant, inhibitor and collecting agent), has avoided crossing of cassiterite to pulverize.Can make ore under the thicker condition of grinding particle size, adopt method for floating to reclaim sulfide minerals such as pyrite, magnetic iron ore, zincblende and jamesonite, realize separating of cassiterite and these sulphide ores,
The grinding process condition is as follows:
Cassiterite polymetallic sulfuration raw ore and floating agent (dispersant, inhibitor and collecting agent) together add ore mill and carry out ore grinding, grinding condition is an ore grinding ore pulp mass percent concentration 50～60%, it is 5.5-6.5 that the acid-base value of ore grinding system is controlled at pH, and the granularity of the ore behind the ore grinding accounts for 53-57% for-0.074mm.
The granularity of cassiterite polymetallic sulfuration raw ore is less than 15mm.
It is 6.0 that the acid-base value of ore grinding system is controlled most preferred pH.
The kind and the consumption of described floating agent are respectively: carboxymethyl polyvinyl alcohol molecular weight 2.5-3.5 ten thousand (wvb 60-100 gram/ton raw ore, prodan 80-100 gram/ton raw ore, flotation collector diethyldithiocarbamate 100-120 gram/ton raw ore.
Described ore mill is the wet type rod mill.
Behind the ore grinding through wet type rod ore mill, essential mineral cassiterite in the cassiterite polymetallic sulphide ore, pyrite, magnetic iron ore, mineral such as zincblende and jamesonite by ore grinding after, expose fresh surface, under the effect of mechanical activation, not same-action takes place with the floating agent that is added in the ore mill, the cassiterite surface-Sn-O-key and carboxymethyl polyvinyl alcohol and prodan have an effect, make its surface not have an effect with the collecting agent diethyldithiocarbamate, and pyrite, magnetic iron ore, behind mineral such as zincblende and the jamesonite ore grinding, do not have an effect with carboxymethyl polyvinyl alcohol and prodan, and have an effect with the collecting agent diethyldithiocarbamate, make its surface hydrophobicity, thereby cause these mineral to have floatability.Its mechanism of action is as follows:
(1) prodan Na
2SiF
6Have and disperse and selective inhibitory, the various mineral of cassiterite polymetallic sulphide ore are disperseed; Can have an effect with the Sn-O key on the cassiterite surface simultaneously, play inhibitory action;
(2) carboxymethyl polyvinyl alcohol (CH
2CH)
nOCH2COOH is an ionic surfactant.Can with the cassiterite mineral surfaces effect of having adsorbed prodan, make cassiterite mineral surfaces selectivity cohesion;
(3) diethyldithiocarbamate is the collecting agent commonly used of sulphide ore, in grinding process, with the effects such as pyrite, magnetic iron ore, zincblende and jamesonite that expose unsalted surface, makes it to have hydrophobicity easily, flotation easily.
The present invention is by carrying out selective milling to cassiterite polymetallic sulphide ore, to change in the ore the particularly surface hydrophilic/hydrophobic property of mineral such as pyrite, magnetic iron ore, zincblende and jamesonite of cassiterite surface and sulfide mineral, make the cassiterite surface not have an effect with flotation collector, and with carboxymethyl polyvinyl alcohol and prodan effect, make cassiterite mineral surfaces selectivity cohesion; Mineral surfaces such as pyrite, magnetic iron ore, zincblende and jamesonite then do not adsorb hydrophilic substance, and the unsalted surface that its ore grinding dissociates is had an effect with the flotation collector that adds ore mill, and its surface hydrophobicity has floatability.Under the thicker condition of ore grinding particle size, realize the FLOTATION SEPARATION of cassiterite and these sulphide ores, avoided crossing of cassiterite to pulverize, help subsequent reselection technology recovery cassiterite.
Adopt the present invention to handle the cassiterite polymetallic sulphide ore that contains Sn 0.3～1.2%, S 10～25%, can account for 55% condition FLOTATION SEPARATION and go out sulfide mineral for-0.074mm at grinding particle size, make that containing S in the stanniferous stone ore stone after the flotation is lower than 3%, the cassiterite ore of-0.074mm grade is than common grinding process low 10～20%, greatly reduce crossing of cassiterite and pulverize, help subsequent technique and adopt reselecting method to reclaim cassiterite.
Technological merit of the present invention is, traditional relatively cassiterite polymetallic sulphide ore ore grinding technology, the present invention adds floating agent by grinding process, can make ore under the thicker condition of grinding particle size, adopt method for floating to realize the FLOTATION SEPARATION of cassiterite and these sulphide ores, particularly at the cassiterite polymetallic sulphide ore that contains Sn 0.5～1%, S 12～17%, adopt the present invention that the ore grinding particle size of flotation requirement is reduced, the cassiterite of particulate (0.039mm grade) content reduces about 20%, has significantly reduced crossing of cassiterite and has pulverized.
The specific embodiment
Following examples are intended to illustrate the present invention rather than limitation of the invention further.
Embodiment 1:
Processing contains Mengzi, the Yunnan cassiterite polymetallic sulphide ore of Sn 0.5%, S 12.3%, and process system is: go into ore grinding stone granularity less than 15mm, grinding condition is an ore milling concentration 55%, and it is 6 that the acid-base value of ore grinding system is controlled at pH; Ore and floating agent (dispersant, inhibitor and collecting agent) together add ore mill and carry out ore grinding, the kind and the dosing that add the floating agent of rod mill are: carboxymethyl polyvinyl alcohol 60 gram/ton raw ores, prodan 80 gram/ton raw ores, flotation collector diethyldithiocarbamate 100 gram/ton raw ores.The granularity of ore accounts for 55% for-0.074mm behind the ore grinding, after carrying out flotation and deviating from sulfide mineral, tin grade (Sn) 3.9% in the residue ore, S content is 2.55%, by grain size analysis, wherein the occupation rate in the tin metal of-0.039mm grade is 28.2%, and the rate of recovery of tin reaches 96.3%, has created advantageous conditions for subsequent technique adopts reselecting method to reclaim cassiterite.
Comparative Examples 1
Conventional ore grinding technical finesse is similarly to Example 1 during the ore deposit, when going into ore grinding stone granularity less than 15mm, adopt method for floating that the sulfide mineral in the ore is removed, the granularity of ore milling product accounts for 61.5% for-0.074mm, after carrying out flotation and deviating from sulfide mineral, and tin grade (Sn) 2.15% in the residue ore, S content is 3.15%, the rate of recovery of tin is 92.8%, and by grain size analysis, wherein the occupation rate in the tin metal of-0.039mm grade is 48.5%.Compare with technology of the present invention, the pulverizing of crossing of cassiterite wants much serious.
Embodiment 2
Processing contains the Gejiu region cassiterite polymetallic sulphide ore of Sn 1.0%, S 16.8%, and process system is: go into ore grinding stone granularity less than 15mm, grinding condition is an ore milling concentration 55%, and it is 6 that the acid-base value of ore grinding system is controlled at pH; Ore and floating agent (dispersant, inhibitor and collecting agent) together add ore mill and carry out ore grinding, the kind and the dosing that add the floating agent of rod mill are: carboxymethyl polyvinyl alcohol 100 gram/ton raw ores, prodan 100 gram/ton raw ores, flotation collector diethyldithiocarbamate 120 gram/ton raw ores.The granularity of ore accounts for 55% for-0.074mm behind the ore grinding, after carrying out flotation and deviating from sulfide mineral, tin grade (Sn) 4.1% in the residue ore, S content is 2.85%, by grain size analysis, wherein the occupation rate in the tin metal of-0.039mm grade is 27.5%, and the rate of recovery of tin reaches 97.1%, has created advantageous conditions for subsequent technique adopts reselecting method to reclaim cassiterite.
Comparative Examples 2
Conventional ore grinding technical finesse is similarly to Example 2 during the ore deposit, when going into ore grinding stone granularity less than 15mm, adopt method for floating that the sulfide mineral in the ore is removed, the granularity of ore milling product accounts for 61.5% for-0.074mm, after carrying out flotation and deviating from sulfide mineral, and tin grade (Sn) 3.58% in the residue ore, S content is 3.23%, the rate of recovery of tin is 93.7%, and by grain size analysis, wherein the occupation rate in the tin metal of-0.039mm grade is 47.6%.Compare with technology of the present invention, the pulverizing of crossing of cassiterite wants much serious.
Claims (4)
1. cassiterite polymetallic sulphide ore selective ore milling process, it is characterized in that: may further comprise the steps: a＞cassiterite polymetallic sulfuration raw ore and floating agent together add ore mill and carry out ore grinding, grinding condition is: the ore pulp mass percent concentration is 50-60% during ore grinding, it is 5.5-6.5 that the acid-base value of ore grinding system is controlled at pH, and the granularity of ore deposit ore accounts for 53-57% for-0.074mm behind the ore grinding:
The kind and the consumption of b＞floating agent are respectively: carboxymethyl polyvinyl alcohol 60-100 gram/ton raw ore, prodan 80-100 gram/ton raw ore, flotation collector diethyldithiocarbamate 100-120 gram/ton raw ore.
2. the method for stating according to claim 1 place, it is characterized in that: the granularity of described cassiterite polymetallic sulphide ore is less than 15mm.
3. the method for stating according to claim 1 or 2 places, it is characterized in that: it is 6 that the acid-base value of ore grinding system is controlled at pH.
4. the method for stating according to claim 1 place, it is characterized in that: described ore mill is the wet type rod mill.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008112A (en) * | 2012-11-30 | 2013-04-03 | 广西高峰矿业有限责任公司 | Selective milling-flotation method for cassiterite multi-metal sulfide ore |
| CN103433149A (en) * | 2013-09-12 | 2013-12-11 | 广西华锡集团股份有限公司车河选矿厂 | Polymetallic sulphide ore flotation process capable of increasing zinc index |
| CN103433142A (en) * | 2013-09-12 | 2013-12-11 | 广西华锡集团股份有限公司车河选矿厂 | Flotation method for micro-fine particle complicated jamesonite |
| CN103567077A (en) * | 2013-11-08 | 2014-02-12 | 昆明川金诺化工股份有限公司 | Method for concentrating sulfur with fluorosilicic acid as activator of pyrite |
| CN106391297A (en) * | 2016-09-09 | 2017-02-15 | 昆明理工大学 | Dressing method of copper tin sulphide ore |
| CN111495574A (en) * | 2020-03-05 | 2020-08-07 | 云南锡业研究院有限公司 | Novel low-grade ore preselection process |
| CN112536155A (en) * | 2020-09-03 | 2021-03-23 | 中南大学 | Medicament group containing fluosilicic acid and application thereof |
| CN113477345A (en) * | 2021-07-28 | 2021-10-08 | 烟台金鹏冶金设计研究工程有限公司 | Flotation method capable of protecting integrity of graphite flakes |
| CN115055286A (en) * | 2022-05-05 | 2022-09-16 | 中国矿业大学(北京) | Method for promoting cassiterite medicament collecting effect |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103008112A (en) * | 2012-11-30 | 2013-04-03 | 广西高峰矿业有限责任公司 | Selective milling-flotation method for cassiterite multi-metal sulfide ore |
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| CN103433142A (en) * | 2013-09-12 | 2013-12-11 | 广西华锡集团股份有限公司车河选矿厂 | Flotation method for micro-fine particle complicated jamesonite |
| CN103567077A (en) * | 2013-11-08 | 2014-02-12 | 昆明川金诺化工股份有限公司 | Method for concentrating sulfur with fluorosilicic acid as activator of pyrite |
| CN106391297A (en) * | 2016-09-09 | 2017-02-15 | 昆明理工大学 | Dressing method of copper tin sulphide ore |
| CN106391297B (en) * | 2016-09-09 | 2019-02-19 | 昆明理工大学 | A kind of beneficiation method of copper and tin sulphide ore |
| CN111495574A (en) * | 2020-03-05 | 2020-08-07 | 云南锡业研究院有限公司 | Novel low-grade ore preselection process |
| CN112536155A (en) * | 2020-09-03 | 2021-03-23 | 中南大学 | Medicament group containing fluosilicic acid and application thereof |
| CN112536155B (en) * | 2020-09-03 | 2022-02-08 | 中南大学 | Medicament group containing fluosilicic acid and application thereof |
| CN113477345A (en) * | 2021-07-28 | 2021-10-08 | 烟台金鹏冶金设计研究工程有限公司 | Flotation method capable of protecting integrity of graphite flakes |
| CN113477345B (en) * | 2021-07-28 | 2023-10-03 | 烟台金鹏矿业机械有限公司 | Flotation method capable of protecting integrity of graphite flake |
| CN115055286A (en) * | 2022-05-05 | 2022-09-16 | 中国矿业大学(北京) | Method for promoting cassiterite medicament collecting effect |
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Application publication date: 20111019 |