CN105312159A - Flotation reagent system for fine wolframite in gravity concentration tailings - Google Patents

Flotation reagent system for fine wolframite in gravity concentration tailings Download PDF

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Publication number
CN105312159A
CN105312159A CN201410343422.9A CN201410343422A CN105312159A CN 105312159 A CN105312159 A CN 105312159A CN 201410343422 A CN201410343422 A CN 201410343422A CN 105312159 A CN105312159 A CN 105312159A
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time
minutes
wolframite
consumption
tungsten
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马忠臣
陈新林
于雪
杨长颖
马延全
吕家华
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SHENYANG RESEARCH INSTITUTE OF NONFERROUS METALS
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SHENYANG RESEARCH INSTITUTE OF NONFERROUS METALS
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Abstract

A flotation reagent system for fine wolframite in gravity concentration tailings is characterized in that 1, a gravity concentration tailing sample is put into a stirring tank, the concentration of ore pulp is controlled, sodium carbonate is added, the pH value of the ore pulp is controlled, and the mixture is stirred; 2, a gangue inhibitor and a fine silt dispersant are added and stirred; 3, a lead nitrate activator for the wolframite is added and stirred; 4, TW-705 serving as a collecting agent, kerosene serving as an auxiliary collecting agent and terpenic oil serving as a foaming agent are added and stirred; 5, the process flow path of carrying out rough concentration once, concentration twice and scavenging twice is adopted in tungsten flotation, the time for rough concentration is 5 min, the time for first-time scavenging and the time for second-time scavenging are 3 min, sodium silicate, a TW-705 and kerosene mixed collecting agent and terpenic oil are added in first-time scavenging, and the time for first-time concentration and the time for second-time concentration are 3 min and 2 min respectively. Tungsten concentrate is obtained through sorting. The tungsten grade of the fine wolframite in the gravity concentration tailings is improved, the tungsten recovery rate of the fine wolframite in the gravity concentration tailings is increased, and fine-fraction tungsten resources can be efficiently recovered.

Description

The System of Flotation Reagent of Fine wolframite in a kind of gravity tailings
Technical field
The present invention relates to a kind of System of Flotation Reagent of nonferrous metals ore, particularly relate to the System of Flotation Reagent of Fine wolframite in Fine wolframite in gravity tailings or washup ore pulp, belong to technical field of beneficiation.
Background technology
The wolframite recoverable reserves in Jiangxi accounts for 60% of national recoverable reserves, reclaim mainly through reselecting method, in mining, fragmentation, grinding process, in primary, the secondary fine produced, tungstenic grade is suitable with raw ore tungsten grade, due to the tungsten mineral fine size in thin mud, argillization is serious simultaneously, causes the tungsten mineral in thin mud to reclaim difficulty.Wu Ye ore dressing plant, following ridge processes 200,000 tons, raw ore now, and thin mud raw ore productive rate accounts for out 8.04% of gallery raw ore, and amount of metal accounts for out 10.34% of gallery raw ore, produces thin mud raw ore amount 16319 tons per year, on average containing WO 3be 0.473%, year tungsten amount of metal is respectively 77.2 tons, the on-the-spot reselecting method that still adopts reclaims tungsten mineral in thin mud, the tungsten concentrate tungsten grade obtained is 11.63%, tungsten operation recovery reaches 45.24%, year reclaims tungsten amount of metal 34.9 tons in thin mud, tungsten grade 0.257% in mine tailing, thin mud mine tailing middle age loss tungsten amount of metal 42.3 tons.
Fine wolframite mainly adopts method for floating, and the factor affecting floatation process process is a lot, and wherein more important have: (1) mog; (2) pulp density; (3) prescription; (4) inflation and stirring; (5) flotation time; (6) floatation process; (7) quality and slurry temperature etc. of water.Its prescription is most important influence factor, and collecting agent is heavy heavy, is the important topic of research always.Fine wolframite flotation requires the collecting agent of high selectivity, and the collecting agent of these high selectivities mainly comprises arsenic acid class, phosphonic acid based, chelating class, amphoteric collector and minority fatty acid collecting agent.Fatty acid collecting agent also can well collecting wolframite, but selective bad because of it, is generally only used in roughly selecting of black tungsten, and needs the cooperation of other collecting agent.Although arsenic acid class and phosphonic acid based collecting agent better selective because toxicity is comparatively large, environmental pollution is relatively more serious, is abandoned just gradually.
Summary of the invention
The object of the invention is just the problems referred to above solving prior art existence, through lot of experiments with after studying for a long period of time, develops the System of Flotation Reagent of Fine wolframite in a kind of effective recovery gravity tailings, makes fine-graded tungsten resource be able to high efficiente callback.The invention of this System of Flotation Reagent is made up of pH value adjusting agent, inhibitor, activator, collecting agent, foaming agent, and adds successively.The invention of this regime of agent, improves tungsten grade and the tungsten recovery rate of Fine wolframite in gravity tailings.
The present invention adopts Novel non-toxic environmental protection medicament TW-705(Main Ingredients and Appearance: O-phthalic base two hydroximic acid) receive good effect as main catching agent flotation thin mud wolframite.
The technical scheme that the present invention provides is: the System of Flotation Reagent of Fine wolframite in this gravity tailings, is made up of pH value adjusting agent, inhibitor, activator, collecting agent, foaming agent, and adds successively, is characterized in being realized by following steps:
(1) gravity tailings sample is put into tank diameter, controlling pulp density is 33 ~ 35%, adds sodium carbonate 300 ~ 600g/t, and control slurry pH 7.8 ~ 8.0, mixing time is 3 minutes;
(2) add gangue inhibitor and thin cement dispersant, waterglass: CMC cellulose=5:1, waterglass is 400 ~ 700g/t with CMC cellulose mixing consumption, and mixing time is 5 minutes;
(3) add the activator plumbi nitras of wolframite, consumption is 200 ~ 400g/t, and mixing time is 5 minutes;
(4) adding collecting agent is TW-705, and supplementary catching agent is kerosene, TW-705: kerosene=5:1, and hybrid collector consumption is 400 ~ 600g/t; Foaming agent is terpenic oil, and its consumption is 20 ~ 30g/t; Mixing time is 3 minutes;
(5) tungsten flotation adopts one roughing, twice selected, to scan for twice technological process.The time of roughly selecting is 5 minutes; The time of scanning is each 3 minutes, and adds waterglass 100g/t at once purging selection, and TW-705 and kerosene hybrid collector consumption are 50 ~ 100g/t, terpenic oil 8 ~ 15g/t; The selected time is respectively 3 minutes and 2 minutes, obtains tungsten concentrate by sorting.Technological process and process conditions are shown in Fig. 1.
Compared with prior art, the invention has the beneficial effects as follows.
(1) adjust slurry pH with carbonic acid, pH value controls ore pulp between 7.8 ~ 8.0, and in such circumstances, collecting agent TW-705 fully can dissolve and play maximum drug effect.
(2) gangue inhibitor and thin cement dispersant select waterglass and the cellulosic combination of CMC, when waterglass: during CMC cellulose=5:1, restrained effectively gangue mineral, and in the higher situation of guarantee tungsten recovery rate, the concentration ratio that wolframite is roughly selected reaches more than 25 times, lays a good foundation for obtaining more high-grade tungsten concentrate.
(3) collecting agent selects TW-705, and this collecting agent has the collecting agent of stronger collecting ability to black and white tungsten mineral, and feature is efficient, low toxicity.The present invention TW-705 and kerosene combine (TW-705 kerosene=5:1), strengthen the collecting ability to wolframite and selective power, and the rate of recovery of wolframite is increased substantially.
(4) adopt this regime of agent, in the tungsten concentrate of output, tungsten grade and tungsten recovery rate are greatly improved, and in tungsten concentrate, tungsten grade reaches more than 30%, and tungsten reclaims and reaches more than 80%.
Accompanying drawing explanation
Fig. 1 is tungsten flotation process and process conditions figure.
Detailed description of the invention
Embodiment 1.
Sample is Wu Ye ore dressing plant, lower ridge gravity tailings, and sample mainly contains the components such as tungsten, molybdenum, bismuth, sulphur and iron.By finding out the light microscope qualification of sample nodulizing: in tungsten slurry, metalliferous mineral content is less, only accounts for 1.91%, and major metal mineral have wolframite, scheelite, pyrite, magnetic iron ore, molybdenite, bismuthine etc.; Content is respectively 0.58%, 0.19%, 0.43%, 0.32%, 0.07%, 0.05%; Nonmetallic mineral content is higher, accounts for 98.09%.Sample chemistry multielement analysis the results are shown in Table 1.
Table 1 sample chemistry multielement analysis result (%).
Sample, through 0.105mm, 0.075mm, 0.053mm, 0.038mm tetra-sieve screen analysises, obtains the product of 5 ranks, and has carried out chemical analysis and nodulizing examination to each rank.Through statistics, sample fineness accounts for 32.02% for-0.075mm accounts for 66.63% ,-0.038mm; Tungsten master metal will be distributed in-0.053mm grade, accounts for 78.04%; Tungsten mineral major part is monomer, and liberation degree of minerals is 80.22%, small part and gangue mineral adhesion.Refer to table 2.
The granularmetric composition of table 2 sample and nodulizing examination statistics (%).
Containing molybdenum, bismuth, sulphur in sample, grade is respectively 0.048%, 0.068%, 0.365%.Therefore first floating sulfide, obtain the bulk concentrate of molybdenum, bismuth, sulphur, then by molybdenum, bismuth and sulphur content from, molybdenum and bismuth separating technology, obtain molybdenum concntrate and bismuth concentrate.Select sulphur mining tailing Fine wolframite, adopt one roughing, scan for twice, technological process that twice selected and floatation process of the present invention, obtain beneficiating technology index in table 3.Important technological parameters is: controlling pulp density is 33%, and add sodium carbonate 400g/t, now slurry pH is 7.8, and mixing time is 3 minutes; Add gangue inhibitor and thin cement dispersant, waterglass+CMC cellulose, consumption is 500g/t, and mixing time is 5 minutes; Add the activator plumbi nitras of wolframite, consumption is 300g/t, and mixing time is 5 minutes; Adding collecting agent is TW-705+ supplementary catching agent kerosene, and consumption is 500g/t; Foaming agent is terpenic oil, and its consumption is 20g/t, and mixing time is 3 minutes.
The thin mud WOLFRAMITE FLOTATION index (%) of table 3.
Embodiment 2.
Test specimen is that lower ridge tungsten industry is former, secondary fine concentrate and concentrated by concentrator after overflow sample, containing WO 3, Mo, Bi be respectively 0.747%, 0.108%, 0.107%.In sample, wolframite mainly exists with monomeric form, accounts for 94.32%, is secondly and gangue adhesion, accounts for 3.36%, small part and pyrite adhesion and limonite adhesion.The granularity of wolframite is comparatively thin, is mainly distributed in-0.037mm to+0.010mm grade, accounts for 78.43%, refer to table 4.
Table 4 wolframite grain size statistics result (%).
Containing molybdenum, bismuth in sample, grade is respectively 0.108%, 0.107%.Also be first float sulfide, obtain the bulk concentrate of molybdenum, bismuth, then by molybdenum and bismuth separating technology, obtain molybdenum concntrate and bismuth concentrate.Select sulphur mining tailing Fine wolframite, adopt one roughing, scan for twice, technological process that twice selected and System of Flotation Reagent of the present invention, obtain beneficiating technology index in table 5.Important technological parameters is: controlling pulp density is 33%, and add sodium carbonate 500g/t, now slurry pH is 7.9, and mixing time is 3 minutes; Add gangue inhibitor and thin cement dispersant, waterglass+CMC cellulose, consumption is 600g/t, and mixing time is 5 minutes; Add the activator plumbi nitras of wolframite, consumption is 350g/t, and mixing time is 5 minutes; Adding collecting agent is TW-705+ supplementary catching agent kerosene, and consumption is 600g/t; Foaming agent is terpenic oil, and its consumption is 20g/t, and mixing time is 3 minutes.
The thin mud WOLFRAMITE FLOTATION index (%) of table 5.
Name of product Productive rate WO 3Grade WO 3Operation recovery
Tungsten concentrate 1.73 37.25 85.86
Mine tailing 98.27 0.108 14.14
Select sulphur mine tailing 100.00 0.751 100.00
Embodiment 3.
Sample is Dayu flotation mill raw materials for production, and this raw material is for containing WO 3the sludge of 0.527%.Adopt one roughing, scan for twice, technological process that twice selected and System of Flotation Reagent of the present invention, obtain beneficiating technology index in table 6.Important technological parameters is: controlling pulp density is 34%, and add sodium carbonate 450g/t, now slurry pH is 7.8, and mixing time is 3 minutes; Add gangue inhibitor and thin cement dispersant, waterglass+CMC cellulose, consumption is 550g/t, and mixing time is 5 minutes; Add the activator plumbi nitras of wolframite, consumption is 300g/t, and mixing time is 5 minutes; Adding collecting agent is TW-705+ supplementary catching agent kerosene, and consumption is 550g/t; Foaming agent is terpenic oil, and its consumption is 25g/t, and mixing time is 3 minutes.
The thin mud WOLFRAMITE FLOTATION index (%) of table 6
Name of product Productive rate WO 3Grade WO 3Operation recovery
Tungsten concentrate 1.48 29.63 83.18
Mine tailing 98.52 0.090 16.81
Select sulphur mine tailing 100.00 0.527 100.00

Claims (2)

1. the System of Flotation Reagent of Fine wolframite in gravity tailings, be characterized in being made up of pH value adjusting agent, inhibitor, activator, collecting agent, foaming agent, and add successively, concrete operating procedure is:
(1) gravity tailings sample is put into tank diameter, controlling pulp density is 33 ~ 35%, adds sodium carbonate 300 ~ 600g/t, and control slurry pH 7.8 ~ 8.0, mixing time is 3 minutes;
(2) add gangue inhibitor and thin cement dispersant, waterglass: CMC cellulose=5:1, waterglass is 400 ~ 700g/t with CMC cellulose mixing consumption, and mixing time is 5 minutes;
(3) add the activator plumbi nitras of wolframite, consumption is 200 ~ 400g/t, and mixing time is 5 minutes;
(4) adding collecting agent is TW-705, and supplementary catching agent is kerosene, TW-705: kerosene=5:1, and hybrid collector consumption is 400 ~ 600g/t; Foaming agent is terpenic oil, and its consumption is 20 ~ 30g/t; Mixing time is 3 minutes;
(5) tungsten flotation adopts one roughing, twice selected, to scan for twice technological process, and the time of roughly selecting is 5 minutes; The time of scanning is each 3 minutes, and adds waterglass 100g/t at once purging selection, and TW-705 and kerosene hybrid collector consumption are 50 ~ 100g/t, terpenic oil 8 ~ 25g/t; The selected time is respectively 3 minutes and 2 minutes.
2. the System of Flotation Reagent of Fine wolframite in gravity tailings according to claim 1, is characterized in that preferred important technological parameters is:
Controlling pulp density is 33 ~ 34%, and add sodium carbonate 400 ~ 500g/t, slurry pH is 7.8 ~ 7.9, and mixing time is 3 minutes;
Add gangue inhibitor and thin cement dispersant, waterglass+CMC cellulose, consumption is 500 ~ 600g/t, and mixing time is 5 minutes;
Add the activator plumbi nitras of wolframite, consumption is 300 ~ 350gg/t, and mixing time is 5 minutes;
Adding collecting agent is TW-705+ supplementary catching agent kerosene, and consumption is 500 ~ 600g/t;
Foaming agent is terpenic oil, and its consumption is 20 ~ 25g/t, and mixing time is 3 minutes.
CN201410343422.9A 2014-07-18 2014-07-18 Flotation reagent system for fine wolframite in gravity concentration tailings Pending CN105312159A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106552717A (en) * 2016-10-28 2017-04-05 江西理工大学 A kind of double application processes of the hydroximic acid compound on mineral floating of aromatic series
CN106733222A (en) * 2016-12-07 2017-05-31 广西大学 A kind of method for floating that Mo-bearing Iron Ores are removed from white tungsten fine ore
CN107837968A (en) * 2017-11-17 2018-03-27 北京有色金属研究总院 A kind of method from Tungsten smelting slag recovery tungsten
CN110614159A (en) * 2019-08-20 2019-12-27 湖南柿竹园有色金属有限责任公司 Pre-enrichment method before black and white tungsten separation
CN110918247A (en) * 2019-11-28 2020-03-27 宁化行洛坑钨矿有限公司 Sorting method of low-grade tungsten black and white fine mud

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2034068C1 (en) * 1991-07-22 1995-04-30 Иркутский институт органической химии СО РАН Method of extraction of sulfides from tungsten-containing ores
CN1133265A (en) * 1995-10-23 1996-10-16 北京矿冶研究总院 Sorting method of recovering black-white tungsten ore from complex multi-metal ore
CN1600444A (en) * 2004-10-27 2005-03-30 广州有色金属研究院 Mineral dressing method for black and white tungsten minerals
CN101269352A (en) * 2008-05-05 2008-09-24 广州有色金属研究院 Beneficiation method for black and white tungsten fine deposit
CN101648157A (en) * 2009-08-25 2010-02-17 广州有色金属研究院 Beneficiation method of black and white tungsten mineral
CN101869876A (en) * 2010-05-24 2010-10-27 广州有色金属研究院 Ore dressing method of low-grade scheelite
RU2403296C1 (en) * 2009-12-25 2010-11-10 Общество с ограниченной ответственностью "ИНТЕГРА РУ" Complex processing method of aged tails of benefication of tungsten-containing ores
CN102489407A (en) * 2011-11-30 2012-06-13 长沙矿冶研究院有限责任公司 Mineral processing method for recycling scheelite/molybdenum oxide ores from molybdenum sulfide flotation tailings
CN103301952A (en) * 2013-06-19 2013-09-18 中南大学 6-aliphatic hydrocarbon amido hexyl hydroximic acid collecting agent and preparation and application methods thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2034068C1 (en) * 1991-07-22 1995-04-30 Иркутский институт органической химии СО РАН Method of extraction of sulfides from tungsten-containing ores
CN1133265A (en) * 1995-10-23 1996-10-16 北京矿冶研究总院 Sorting method of recovering black-white tungsten ore from complex multi-metal ore
CN1600444A (en) * 2004-10-27 2005-03-30 广州有色金属研究院 Mineral dressing method for black and white tungsten minerals
CN101269352A (en) * 2008-05-05 2008-09-24 广州有色金属研究院 Beneficiation method for black and white tungsten fine deposit
CN101648157A (en) * 2009-08-25 2010-02-17 广州有色金属研究院 Beneficiation method of black and white tungsten mineral
RU2403296C1 (en) * 2009-12-25 2010-11-10 Общество с ограниченной ответственностью "ИНТЕГРА РУ" Complex processing method of aged tails of benefication of tungsten-containing ores
CN101869876A (en) * 2010-05-24 2010-10-27 广州有色金属研究院 Ore dressing method of low-grade scheelite
CN102489407A (en) * 2011-11-30 2012-06-13 长沙矿冶研究院有限责任公司 Mineral processing method for recycling scheelite/molybdenum oxide ores from molybdenum sulfide flotation tailings
CN103301952A (en) * 2013-06-19 2013-09-18 中南大学 6-aliphatic hydrocarbon amido hexyl hydroximic acid collecting agent and preparation and application methods thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
马忠臣等: "钨细泥中钨全泥浮选工艺研究", 《有色金属(选矿部分)》 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106552717A (en) * 2016-10-28 2017-04-05 江西理工大学 A kind of double application processes of the hydroximic acid compound on mineral floating of aromatic series
CN106733222A (en) * 2016-12-07 2017-05-31 广西大学 A kind of method for floating that Mo-bearing Iron Ores are removed from white tungsten fine ore
CN107837968A (en) * 2017-11-17 2018-03-27 北京有色金属研究总院 A kind of method from Tungsten smelting slag recovery tungsten
CN107837968B (en) * 2017-11-17 2020-05-29 北京有色金属研究总院 Method for recovering tungsten from tungsten smelting slag
CN110614159A (en) * 2019-08-20 2019-12-27 湖南柿竹园有色金属有限责任公司 Pre-enrichment method before black and white tungsten separation
CN110918247A (en) * 2019-11-28 2020-03-27 宁化行洛坑钨矿有限公司 Sorting method of low-grade tungsten black and white fine mud

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Application publication date: 20160210