CN104722408A - Method for recycling gold in cyanided tailings in ramified and series flotation mode - Google Patents
Method for recycling gold in cyanided tailings in ramified and series flotation mode Download PDFInfo
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- CN104722408A CN104722408A CN201410678782.4A CN201410678782A CN104722408A CN 104722408 A CN104722408 A CN 104722408A CN 201410678782 A CN201410678782 A CN 201410678782A CN 104722408 A CN104722408 A CN 104722408A
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- flotation
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Abstract
The invention discloses a method for recycling gold in cyanided tailings in a ramified and series flotation mode. The method includes the following steps that ore pulp pretreatment is conducted, and sodium carbonate and ferrous sulfate are used as ore pulp regulators; coal oil flotation decarbonizing is carried out; ramified pulp mixing is conducted, the decarbonized ore pulp automatically flows to a stirring and distributing groove, and the ore pulp is evenly distributed to two pulp mixing barrels for mixing pulp through the stirring and distributing groove; ramified and series flotation is performed, foam products in first rougher flotation fully enter in second rougher flotation to be subjected to flotation together with the decarbonized ore pulp, foam products in second rougher flotation undergo closed circuit concentration operation of first concentration and second concentration to obtain gold concentrate, and no drug is added in the concentration stage; products in the groove of first rougher flotation are subjected to closed circuit scavenging of first scavenging and second scavenging to obtain tailings. By the adoption of the method, the recovery rate of the gold can be improved obviously, meanwhile, drug consumption is lowered, and the cost is saved.
Description
Technical field
The present invention relates to technical field of mineral processing, specifically come just to relate to a kind of method utilizing branch's crossfire flotation to reclaim gold in cyanidation tailings.
Background technology
Cyanidation tailings carries by gold mine cyaniding the waste residue produced in golden process, and the gold still containing recoverable, gold content, generally at more than 1g/t, is a kind of secondary resource.Contain some heavy metal ion and cyanide in cyanidation tailings, it is stored up for a long time in a large number can to environment simultaneously.In recent years, many researchers are to proposing gold research from cyanidation tailings, but with the addition of the medicaments such as Cymag, lime, bleaching powder in process of production due to cyanide residue, mineral surfaces character is made to there occurs obvious change through long-time cyaniding process, particularly auriferous pyrite and other containing golden sulfide easily oxidized its floatability that makes decline, add the strong inhibition effect of cyanide to sulfide mineral, make the microfine cyanide residue flotation being inherently difficult to ore dressing carry gold and become more difficult.The cyanide residue extraction of gold process that visible research is efficient and with low cost and medicament, have important reality and far-reaching significance for solution environmental pollution and comprehensive utilization of resources.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming and a kind of rate of recovery significantly improving gold of providing, reduce medicine consumption, the cost-effective method utilizing branch crossfire flotation to reclaim gold in cyanidation tailings simultaneously.
A kind of method utilizing branch's crossfire flotation to reclaim gold in cyanidation tailings of the present invention, comprises the following steps:
(1) ore pulp pretreatment: the tailings after all sliming cyanidation process is added surge tank, add water adjustment pulp density 20 ~ 40%, and normal temperature and pressure stirs 5 ~ 7 minutes continuously, to be mixed evenly after add the Na of 1000 ~ 1500g/t
2cO
3with the Fe of 500 ~ 1200g/t
2sO
4, adjustment pH values of pulp=7 ~ 8, then pump is to flotation stage;
(2) flotation de-carbon: the ore pulp that pretreatment is good is pumped into stirring dashpot, continue stirring 15 ~ 20 minutes, from inflow surge tank, add the kerosene of 50 ~ 80g/t and the terpenic oil of 20 ~ 30g/t, abundant stirring is after 3 ~ 5 minutes, ore pulp enters flotation device and carries out flotation de-carbon, and froth pulp obtains carbon containing Gold Concentrate under Normal Pressure after press filtration;
(3) shunting is sized mixing: the pulp gravity flow after de-carbon is to stirring distributing trough, by stirring distributing trough, ore pulp is averagely allocated to two mixing cirterns to size mixing, add calgon 600 ~ 1000g/t roughly selecting in a mixing cirtern, waterglass 900 ~ 1500g/t, plumbi nitras 400 ~ 600g/t, copper sulphate 500 ~ 1000g/t, butylamine black powder 50 ~ 80g/t, benzyl hydroximic acid consumption 8 ~ 15g/t, roughly select in two mixing cirterns and add calgon 300 ~ 400g/t, waterglass 400 ~ 800g/t, plumbi nitras 200 ~ 250g/t, copper sulphate 150 ~ 500g/t, butylamine black powder 10 ~ 50g/t, benzyl hydroximic acid consumption 3 ~ 6g/t, and stir continuously, then pump to two initial separatory cell enters branch's crossfire flotation,
(4) branch's crossfire flotation: the froth pulp roughly selecting all enters roughly selects two with ore pulp after de-carbon together flotation, the froth pulp roughly selecting two obtains Gold Concentrate under Normal Pressure through selected one, selected two closed circuit selected operations, and this selected stage does not add any medicament; In the groove roughly selecting a product through scanning one, scan two closed circuit scan after mine tailing.Scanning stage process condition is:
Scan one: copper sulphate 150 ~ 400g/t, isoamyl xanthate 10 ~ 50g/t, terpenic oil 5 ~ 25g/t;
Scan two: isoamyl xanthate 5 ~ 30g/t, terpenic oil 2 ~ 15g/t.
A kind of above-mentioned method utilizing branch's crossfire flotation to reclaim gold in cyanidation tailings, wherein: cyanidation tailings contains Au1.42 ~ 2.82g/t, carbon containing 0.92 ~ 1.32%, sulfur-bearing 0.22 ~ 0.92%.
A kind of above-mentioned method utilizing branch's crossfire flotation to reclaim gold in cyanidation tailings, wherein: the foam scanning two returns scans one, the foam scanning returns roughly selects one.
A kind of above-mentioned method utilizing branch's crossfire flotation to reclaim gold in cyanidation tailings, wherein: the ore pulp of selected two returns selected one, the ore pulp of selected returns roughly selects two.
The present invention compared with prior art, there is obvious beneficial effect, as can be known from the above technical solutions: adopt sodium carbonate and ferrous sulfate to be ore pulp adjusting agent, dispersion ore pulp and the alkaline effect simultaneously precipitating the microfine sludge in ore pulp of adjustment ore pulp can be played, thus make the floatability of target minreal recover and be improved; Adopt kerosene flotation de-carbon, greatly can reduce the carbon content in flow process, reduce carbon to the suction-operated of floating agent, for the flotation of branch's crossfire provides good environment, reduce reagent cost below.Adopt the gold in branch's crossfire flotation for recovery of fine cyanidation tailings, the residual pharmacy roughly selected in a froth pulp and ore pulp can be made full use of, thus reduce the additive amount of medicament of roughly selecting two, its total dosing is made to be only 60 ~ 90% of conventional flotation dosage, mineral particle simultaneously through pharmacy effect hydrophobization has played again " load " effect of its floc sedimentation, reach the effect of " carrier flotation ", substantially increase the rate of recovery of gold, make it to reach more than 90%.Present invention process is simple, economic and practical, dosing is few, small investment, instant effect, has significant technology and economic benefit, have wide popularizing application prospect for the gold utensil recycled in microfine cyanidation tailings.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Detailed description of the invention
embodiment 1
Utilize branch's crossfire flotation to reclaim a method for gold in cyanidation tailings, comprise the following steps:
All sliming cyanidation tailings containing Au2.82g/t, carbon containing 1.32%, sulfur-bearing 0.92%, add water adjustment pulp density 20 ~ 40%, and normal temperature and pressure stirs 5 ~ 7 minutes continuously, according to reagent combination listed by table 1, to be mixed evenly after add Na
2cO
3, Fe
2sO
4to size mixing pH=7 ~ 8, the ore pulp that pretreatment is good is pumped into stirring dashpot, continue stirring 15 ~ 20 minutes, from inflow surge tank, add kerosene and terpenic oil, fully stir 3 minutes, ore pulp enters flotation device and carries out flotation de-carbon, and froth pulp obtains carbon containing Gold Concentrate under Normal Pressure after press filtration; Pulp gravity flow after de-carbon is to stirring distributing trough, by stirring distributing trough, ore pulp is averagely allocated to two mixing cirterns, roughly selecting one, roughly selecting the beneficiation reagent that in two mixing cirterns, additional proportion is different respectively, and stir continuously, then pump to two initial separatory cell enters branch's crossfire flotation stage, the froth pulp roughly selecting one all enters roughly selects two with ore pulp after de-carbon together flotation, the froth pulp roughly selecting two obtains final Gold Concentrate under Normal Pressure through selected one, selected two closed circuit selected operations, and the selected stage does not add any medicament; To roughly select in a groove product through through scanning one, scan two closed circuit scan after mine tailing.The foam scanning two returns scans one, and the foam scanning returns roughly selects one.The ore pulp of selected two returns selected one, and the ore pulp of selected returns roughly selects two.Whole branch crossfire floatation process carries out in row's flotation device, output concentrate and tailings.
Obtain the listed carbon containing Gold Concentrate under Normal Pressure containing Au18.33g/t, the rate of recovery 9.88% of table 2 by analysis, containing the Gold Concentrate under Normal Pressure of Au39.11g/t, the rate of recovery 80.44%.Bulk concentrate Au34.80g/t, the overall recovery 90.32% of gold.
embodiment 2
Utilize branch's crossfire flotation to reclaim a method for gold in cyanidation tailings, comprise the following steps:
Certain all sliming cyanidation mine tailing containing Au1.91g/t, carbon containing 1.15%, sulfur-bearing 0.52%, add water adjustment pulp density 20 ~ 40%, and normal temperature and pressure stirs 5 ~ 7 minutes continuously, according to reagent combination listed by table 1, formula, to be mixed evenly after add Na
2cO
3, Fe
2sO
4to size mixing pH=7 ~ 8, the ore pulp that pretreatment is good is pumped into stirring dashpot, continue stirring 15 ~ 20 minutes, from inflow surge tank, add kerosene and terpenic oil, fully stir 4 minutes, ore pulp enters flotation device and carries out flotation de-carbon, and froth pulp obtains carbon containing Gold Concentrate under Normal Pressure after press filtration; Pulp gravity flow after de-carbon is to stirring distributing trough, by stirring distributing trough, ore pulp is averagely allocated to two mixing cirterns, roughly selecting one, roughly selecting the beneficiation reagent that in two mixing cirterns, additional proportion is different respectively, and stir continuously, then pump to two initial separatory cell enters branch's crossfire flotation stage, the froth pulp roughly selecting one all enters roughly selects two with ore pulp after de-carbon together flotation, the froth pulp roughly selecting two obtains final Gold Concentrate under Normal Pressure through selected one, selected two closed circuit selected operations, and the selected stage does not add any medicament; To roughly select in a groove product through through scanning one, scan two closed circuit scan after mine tailing.The foam scanning two returns scans one, and the foam scanning returns roughly selects one.The ore pulp of selected two returns selected one, and the ore pulp of selected returns roughly selects two.Whole branch crossfire floatation process carries out in row's flotation device, output concentrate and tailings.
Obtain the listed carbon containing Gold Concentrate under Normal Pressure containing Au15.56g/t, the rate of recovery 10.08% of table 2 by analysis, containing the Gold Concentrate under Normal Pressure of Au38.28 g/t, the rate of recovery 80.22%.Bulk concentrate Au 32.92g/t, the overall recovery 90.30% of gold.
embodiment 3
Utilize branch's crossfire flotation to reclaim a method for gold in cyanidation tailings, comprise the following steps:
Certain all sliming cyanidation mine tailing containing Au1.42g/t, carbon containing 0.92%, sulfur-bearing 0.22%, add water adjustment pulp density 20 ~ 40%, and normal temperature and pressure stirs 5 ~ 7 minutes continuously, according to reagent combination listed by table 1, formula, to be mixed evenly after add Na
2cO
3, Fe
2sO
4to size mixing pH=7 ~ 8, the ore pulp that pretreatment is good is pumped into stirring dashpot, continue stirring 15 ~ 20 minutes, from inflow surge tank, add kerosene and terpenic oil, fully stir 5 minutes, ore pulp enters flotation device and carries out flotation de-carbon, and froth pulp obtains carbon containing Gold Concentrate under Normal Pressure after press filtration; Pulp gravity flow after de-carbon is to stirring distributing trough, by stirring distributing trough, ore pulp is averagely allocated to two mixing cirterns, roughly selecting one, roughly selecting the beneficiation reagent that in two mixing cirterns, additional proportion is different respectively, and stir continuously, then pump to two initial separatory cell enters branch's crossfire flotation stage, the froth pulp roughly selecting one all enters roughly selects two with ore pulp after de-carbon together flotation, the froth pulp roughly selecting two obtains final Gold Concentrate under Normal Pressure through selected one, selected two closed circuit selected operations, and the selected stage does not add any medicament; To roughly select in a groove product through through scanning one, scan two closed circuit scan after mine tailing.Whole branch crossfire floatation process carries out in row's flotation device, output concentrate and tailings.
Obtain the listed carbon containing Gold Concentrate under Normal Pressure containing Au16.82g/t, the rate of recovery 9.83% of table 2 by analysis, containing the Gold Concentrate under Normal Pressure of Au36.11 g/t, the rate of recovery 78.32%.Bulk concentrate Au 32.02g/t, the overall recovery 88.15% of gold.
Table 1 reagent combination
Table 2 embodiment 1,2,3 technic index
Note: in present invention process index bulk concentrate be carbon containing Gold Concentrate under Normal Pressure with gold floatation concentrate mix Gold Concentrate under Normal Pressure.
Claims (4)
1. utilize branch's crossfire flotation to reclaim a method for gold in cyanidation tailings, comprise the following steps:
(1) ore pulp pretreatment: the tailings after all sliming cyanidation process is added surge tank, add water adjustment pulp density 20 ~ 40%, and normal temperature and pressure stirs 5 ~ 7 minutes continuously, to be mixed evenly after add the Na of 1000 ~ 1500g/t
2cO
3with the Fe of 500 ~ 1200g/t
2sO
4, adjustment pH values of pulp=7 ~ 8, then pump is to flotation stage;
(2) flotation de-carbon: the ore pulp that pretreatment is good is pumped into stirring dashpot, continue stirring 15 ~ 20 minutes, from inflow surge tank, add the kerosene of 50 ~ 80g/t and the terpenic oil of 20 ~ 30g/t, abundant stirring is after 3 ~ 5 minutes, ore pulp enters flotation device and carries out flotation de-carbon, and froth pulp obtains carbon containing Gold Concentrate under Normal Pressure after press filtration;
(3) shunting is sized mixing: the pulp gravity flow after de-carbon is to stirring distributing trough, by stirring distributing trough, ore pulp is averagely allocated to two mixing cirterns to size mixing, add calgon 600 ~ 1000g/t roughly selecting in a mixing cirtern, waterglass 900 ~ 1500g/t, plumbi nitras 400 ~ 600g/t, copper sulphate 500 ~ 1000g/t, butylamine black powder 50 ~ 80g/t, benzyl hydroximic acid consumption 8 ~ 15g/t, roughly select in two mixing cirterns and add calgon 300 ~ 400g/t, waterglass 400 ~ 800g/t, plumbi nitras 200 ~ 250g/t, copper sulphate 150 ~ 500g/t, butylamine black powder 10 ~ 50g/t, benzyl hydroximic acid consumption 3 ~ 6g/t, and stir continuously, then pump to two initial separatory cell enters branch's crossfire flotation,
(4) branch's crossfire flotation: the froth pulp roughly selecting all enters roughly selects two with ore pulp after de-carbon together flotation, the froth pulp roughly selecting two obtains Gold Concentrate under Normal Pressure through selected one, selected two closed circuit selected operations, and this selected stage does not add any medicament; In the groove roughly selecting a product through scanning one, scan two closed circuit scan after mine tailing;
Scanning stage process condition is:
Scan one: copper sulphate 150 ~ 400g/t, isoamyl xanthate 10 ~ 50g/t, terpenic oil 5 ~ 25g/t;
Scan two: isoamyl xanthate 5 ~ 30g/t, terpenic oil 2 ~ 15g/t.
2. a kind of method utilizing branch crossfire flotation to reclaim gold in cyanidation tailings as claimed in claim 1, wherein: cyanidation tailings containing Au1.42 ~ 2.82g/t, carbon containing 0.92 ~ 1.32%, sulfur-bearing 0.22 ~ 0.92%.
3. a kind of method utilizing branch crossfire flotation to reclaim gold in cyanidation tailings as claimed in claim 1 or 2, wherein: the foam scanning two returns scans one, the foam scanning returns roughly selects one.
4. a kind of method utilizing branch crossfire flotation to reclaim gold in cyanidation tailings as claimed in claim 1 or 2, wherein: the ore pulp of selected two returns selected one, the ore pulp of selected returns roughly selects two.
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| CN105327783A (en) * | 2015-11-17 | 2016-02-17 | 紫金矿业集团股份有限公司 | Low-grade scheelite branch floating method |
| CN105381886A (en) * | 2015-12-14 | 2016-03-09 | 灵宝金源晨光有色矿冶有限公司 | Flotation reagent for gold-containing thiocyanic castaway slag |
| CN106799309A (en) * | 2017-01-22 | 2017-06-06 | 彝良驰宏矿业有限公司 | A kind of method for floating of high efficiency zincblende |
| CN107617507A (en) * | 2017-08-31 | 2018-01-23 | 厦门紫金矿冶技术有限公司 | Gold, the new technology of sulphur are reclaimed in a kind of biological oxidation cyanidation tailings from Gold Concentrate under Normal Pressure |
| CN108262173A (en) * | 2018-01-20 | 2018-07-10 | 华北科技学院 | A kind of coal slime cooperates with floatation process |
| CN113751180A (en) * | 2021-08-20 | 2021-12-07 | 江西铜业集团有限公司 | Beneficiation method for complex embedded low-grade copper-sulfur ore |
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| US20050188791A1 (en) * | 2004-02-18 | 2005-09-01 | Seeley Larry E. | Process to recover base metals |
| CN1865461A (en) * | 2006-06-19 | 2006-11-22 | 青岛黄金铅锌开发有限公司 | Method for floatation and recovery of lead zinc mixed concentrate from gold mine cyaniding slag tails |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105327783A (en) * | 2015-11-17 | 2016-02-17 | 紫金矿业集团股份有限公司 | Low-grade scheelite branch floating method |
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| CN106799309A (en) * | 2017-01-22 | 2017-06-06 | 彝良驰宏矿业有限公司 | A kind of method for floating of high efficiency zincblende |
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| CN108262173A (en) * | 2018-01-20 | 2018-07-10 | 华北科技学院 | A kind of coal slime cooperates with floatation process |
| CN113751180A (en) * | 2021-08-20 | 2021-12-07 | 江西铜业集团有限公司 | Beneficiation method for complex embedded low-grade copper-sulfur ore |
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