CN102505077A - Method for recovering valuable elements from cyanide tailings - Google Patents
Method for recovering valuable elements from cyanide tailings Download PDFInfo
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- CN102505077A CN102505077A CN2011104552962A CN201110455296A CN102505077A CN 102505077 A CN102505077 A CN 102505077A CN 2011104552962 A CN2011104552962 A CN 2011104552962A CN 201110455296 A CN201110455296 A CN 201110455296A CN 102505077 A CN102505077 A CN 102505077A
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- flotation
- copper
- tailings
- filter cake
- cyanidation tailings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention relates to a method for recovering valuable elements from cyanide tailings, which is advantageous in that valuable elements in cyanide tailings can be recovered by means of flotation. The method comprises the following steps of: (1) dehydrating cyanide tailings and making filter cake, dissolving the filter cake with water to make ore slurry; (2) adding sulfuric acid into the ore slurry to adjust pH to 8.0 to 8.2; (3) performing lead-zinc bulk flotation: including adding butyl xanthate, black catching agents and diethyldithiocarbamate, recovering lead/zinc elements in cyanide tailings by flotation of the resulting mixture, to obtain lead-zinc bulk flotation concentrate and lead-zinc bulk flotation tailings; (4) adding sulfuric acid into the lead-zinc bulk flotation concentrate to adjust pH to 6.8 to 7.0, and activating by acid immersion; and (5) performing copper flotation: including adding butyl xanthate and flotation oil No.2 into the product from the step (4), recovering copper element in cyanide tailings by flotation of the resulting mixture, to obtain copper flotation concentrate and copper flotation tailings.
Description
Technical field
The present invention relates to a kind of recovery method of valuable element, particularly relate to a kind of recovery method that is used for the cyanidation tailings valuable element.
Background technology
Cyanidation tailings is meant through the gold ore of the flotation tailings through obtaining after cyanidation gold-extracted and the press filtration again, not only contains the gold of some amount, and what have also contains the valuable element that other can comprehensively reclaim, like copper, silver, lead, zinc, iron, antimony, tungsten, bismuth, sulphur etc.Because the difference of the gold extraction technology flow process of ore character and employing, the character of valuable element and mineral, kind, content also all have difference in the tailings.Along with the exhaustion day by day of Mineral resources, cyanidation tailings needs develop well as the secondary resource of preciousness.From cyanidation tailings, reclaim metal and be different from traditional metal that from metal sulfide, reclaims, its major cause:
1. gold ore causes mineral granularity very thin (content of 0.045mm grade reaches 95%, even thinner) through regrinding and long air agitation, and specific surface area increases, and presents " type colloidal state " dispersion system, causes the flotation difficulty;
2. metalliferous mineral is seriously overground, and a part of metalliferous mineral is difficult to activation owing to over oxidation receives exhibited strong inhibition in the cyaniding process;
3. a large amount of shale silicate minerals and prussiates can worsen floatation process in the ore pulp, influences the grade and the recovery of concentrate.
Because it is receive the influence of above-mentioned each factor, the flotability of part mineral greatly reduces, difficult through floatation recovery valuable element wherein.
Summary of the invention
The technical problem that the present invention will solve provides the recovery method of valuable element in a kind of cyanidation tailings that can carry out through flotation.
The recovery method of valuable element in the cyanidation tailings of the present invention may further comprise the steps:
(1) filter cake is processed in the cyanidation tailings dehydration, water is mixed with ore pulp with filter cake, and the concentration of filter cake is 36-42 quality % in the ore pulp;
(2) in ore pulp, add sulfuric acid adjustment pH values of pulp to 8.0-8.2; Miscellaneous, sodium cyanide chance sulfuric acid used when cyaniding is leached generate the prussic acid volatilization and consume a large amount of sodium cyanides in the cyanidation tailings; In this pH value scope, the concentration of sodium cyanide suppresses the leaching of copper and does not suppress the leaching of plumbous zinc.
(3) plumbous zinc bulk flotation: add butyl xanthate, black powder, diethyldithiocarbamate again and obtain mixture; Wherein: the mass ratio of filter cake is (15-20g) in butyl xanthate, black powder and diethyldithiocarbamate and the step (1): (5-10g): (5-10g): 1t; The gained mixture is carried out the plumbous zinc element in the floatation recovery cyanidation tailings, obtain plumbous zinc bulk flotation concentrate and plumbous zinc bulk flotation mine tailing;
(4) in plumbous zinc bulk flotation mine tailing, add sulfuric acid adjustment pH value to 6.8-7.0; Carry out the acidleach activation; Vitriolic adds the sodium cyanide that further consumes in the cyanidation tailings; When pH was adjusted to 6.8-7.0, the sodium cyanide in the cyanidation tailings was exhausted basically, no longer suppressed the leaching of copper;
(5) copper flotation: in step (4) products therefrom, add butyl xanthate; Also add the 2# flotation oil; Wherein: the mass ratio of filter cake is (30-40g) in butyl xanthate and 2# flotation oil and the step (1): (5-10g): 1t; The gained mixture is carried out the copper in the floatation recovery cyanidation tailings, obtain copper flotation concentrate and copper flotation tailings.
The recovery method of valuable element in the cyanidation tailings of the present invention, wherein said valuable element are lead, zinc and copper.
The recovery method of valuable element in the cyanidation tailings of the present invention, wherein said butyl xanthate are butyl dithiocarbonic acid sodium or dithio-butyl carbonate.
The recovery method of valuable element in the cyanidation tailings of the present invention, wherein said black powder are alkyl dithiophosphoric acid or its esters.
The recovery method of valuable element in the cyanidation tailings of the present invention, wherein said black powder is: xylyl phosphorodithioic acid, i.e. No. 25 black powder.
The recovery method of valuable element in the cyanidation tailings of the present invention, the copper flotation tailings in the wherein said step (5) is through concentrating press filtration, and filtrating is returned the copper flotation flowsheet and is used, and filter cake is as selling the chemical plant outside the sulphur ore deposit.
The recovery method difference from prior art of valuable element is in the cyanidation tailings of the present invention: plumbous zinc and copper can separate through the method for flotation; Recycle respectively; Plumbous grade is 25.00 quality %; The zinc grade is 27.00 quality %, and lead recovery is 65.60 quality %, and zinc recovery is 70.90 quality %; The copper ore concentrates grade is 15.25 quality %, the recovery 75.48 quality %.
Embodiment
Embodiment 1
1, the cyanidation tailings of leaded 0.45 quality %, zinc 0.40 quality %, copper 0.45 quality % is concentrated, filter-press dehydration is processed filter cake, gets filter cake 36kg, with 64kg water filter cake is mixed with ore pulp;
2, in ore pulp, add sulfuric acid adjustment pH values of pulp to 8.0;
3, add butyl dithiocarbonic acid sodium 0.54g, xylyl phosphorodithioic acid 0.18g, diethyldithiocarbamate 0.18g again, the gained mixture is carried out the plumbous zinc element in the floatation recovery cyanidation tailings, obtain plumbous zinc bulk flotation concentrate and plumbous zinc bulk flotation mine tailing;
4, after adding sulfuric acid adjustment pH value to 7.0 is carried out the acidleach activation in plumbous zinc bulk flotation mine tailing; In products therefrom, add butyl dithiocarbonic acid sodium 1.08g and 2# flotation oil 0.18g; The gained mixture is carried out the copper in the floatation recovery cyanidation tailings, obtain copper flotation concentrate and copper flotation tailings.
Wherein: plumbous grade is 25.00 quality % in the plumbous zinc bulk flotation concentrate of acquisition, and lead recovery is 65.60 quality %; The zinc grade is 27.00 quality %, and zinc recovery is 70.90 quality %; The copper ore concentrates grade is 15.25 quality %, the recovery 75.48 quality %.
Embodiment 2
1, the cyanidation tailings of leaded 0.45 quality %, zinc 0.40 quality %, copper 0.45 quality % is concentrated, filter-press dehydration is processed filter cake, gets filter cake 42kg, with 58kg water filter cake is mixed with ore pulp;
2, in ore pulp, add sulfuric acid adjustment pH values of pulp to 82;
3, add dithio-butyl carbonate 0.84g, xylyl phosphorodithioic acid 0.42g, diethyldithiocarbamate 0.42g again, the gained mixture is carried out the plumbous zinc element in the floatation recovery cyanidation tailings, obtain plumbous zinc bulk flotation concentrate and plumbous zinc bulk flotation mine tailing;
4, after adding sulfuric acid adjustment pH value to 6.8 is carried out the acidleach activation in plumbous zinc bulk flotation mine tailing; In products therefrom, add dithio-butyl carbonate 1.68g and 2# flotation oil 0.42g; The gained mixture is carried out the copper in the floatation recovery cyanidation tailings, obtain copper flotation concentrate and copper flotation tailings.
Wherein: plumbous grade is 25.00 quality % in the plumbous zinc bulk flotation concentrate of acquisition, and lead recovery is 65.76 quality %; The zinc grade is 27.00 quality %, and zinc recovery is 70.95 quality %; The copper ore concentrates grade is 15.25 quality %, the recovery 75.59 quality %.
Above-described embodiment describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Design under the prerequisite of spirit not breaking away from the present invention; Various distortion and improvement that those of ordinary skills make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (6)
1. the recovery method of valuable element in the cyanidation tailings is characterized in that: may further comprise the steps:
(1) filter cake is processed in the cyanidation tailings dehydration, water is mixed with ore pulp with filter cake, and the concentration of filter cake is 36-42 quality % in the ore pulp;
(2) in ore pulp, add sulfuric acid adjustment pH values of pulp to 8.0-8.2;
(3) plumbous zinc bulk flotation: add butyl xanthate, black powder, diethyldithiocarbamate again and obtain mixture; The gained mixture is carried out the plumbous zinc element in the floatation recovery cyanidation tailings; Obtain plumbous zinc bulk flotation concentrate and plumbous zinc bulk flotation mine tailing, wherein: the mass ratio of filter cake is (15-20g) in butyl xanthate, black powder and diethyldithiocarbamate and the step (1): (5-10g): (5-10g): 1t;
(4) in plumbous zinc bulk flotation mine tailing, add sulfuric acid adjustment pH value to 6.8-7.0; Carry out the acidleach activation;
(5) copper flotation: in step (4) products therefrom, add butyl xanthate; Also add the 2# flotation oil; The gained mixture is carried out the copper in the floatation recovery cyanidation tailings; Obtain copper flotation concentrate and copper flotation tailings, wherein: the mass ratio of filter cake is (30-40g) in butyl xanthate and 2# flotation oil and the step (1): (5-10g): 1t.
2. the recovery method of valuable element in the cyanidation tailings according to claim 1 is characterized in that: said valuable element is lead, zinc and copper.
3. the recovery method of valuable element in the cyanidation tailings according to claim 1 and 2 is characterized in that: said butyl xanthate is butyl dithiocarbonic acid sodium or dithio-butyl carbonate.
4. the recovery method of valuable element in the cyanidation tailings according to claim 1 and 2 is characterized in that: said black powder is alkyl dithiophosphoric acid or its esters.
5. the recovery method of valuable element in the cyanidation tailings according to claim 4 is characterized in that: said black powder is the xylyl phosphorodithioic acid.
6. the recovery method of valuable element in the cyanidation tailings according to claim 5 is characterized in that: the copper flotation tailings in the said step (5) is through concentrating press filtration, and filtrating is returned the copper flotation flowsheet and used, and filter cake is as selling the chemical plant outside the sulphur ore deposit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104552962A CN102505077A (en) | 2011-12-30 | 2011-12-30 | Method for recovering valuable elements from cyanide tailings |
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| CN2011104552962A CN102505077A (en) | 2011-12-30 | 2011-12-30 | Method for recovering valuable elements from cyanide tailings |
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| CN102505077A true CN102505077A (en) | 2012-06-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102784722A (en) * | 2012-08-27 | 2012-11-21 | 桐柏银矿有限责任公司 | Flotation process for cyanide tailings in silver concentrates |
| CN106733205A (en) * | 2016-12-11 | 2017-05-31 | 南京银茂铅锌矿业有限公司 | The Efficient beneficiation method of troilite in lead zinc flotation tailing |
| CN107217135A (en) * | 2017-06-13 | 2017-09-29 | 山东国大黄金股份有限公司 | A kind of method of the multistage Concentration of Gold Ag-Cu-Zn of cyanidation gold-extracted waste slag and synthetical recovery |
| CN107952577A (en) * | 2017-11-30 | 2018-04-24 | 长沙三博矿业科技有限公司 | Difficulty selects cyanidation tailings preprocess method |
| CN111940149A (en) * | 2020-08-27 | 2020-11-17 | 湖北菲利华融鉴科技有限公司 | Flotation reagent |
| CN111979412A (en) * | 2020-07-10 | 2020-11-24 | 华南师范大学 | Method for recovering lead and zinc in copper-sulfur tailings |
Citations (2)
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| CN1986071A (en) * | 2006-12-06 | 2007-06-27 | 山东国大黄金股份有限公司 | Floating process for enriching Cu, Ag, Au, etc from gold sulfide ore cyanizing gold extraction tailing |
| CN101214470A (en) * | 2008-01-21 | 2008-07-09 | 北京科技大学 | Method for using cyaniding barren solution to float, reclaim and cyaniding copper plumbum and zinc in tailings |
-
2011
- 2011-12-30 CN CN2011104552962A patent/CN102505077A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1986071A (en) * | 2006-12-06 | 2007-06-27 | 山东国大黄金股份有限公司 | Floating process for enriching Cu, Ag, Au, etc from gold sulfide ore cyanizing gold extraction tailing |
| CN101214470A (en) * | 2008-01-21 | 2008-07-09 | 北京科技大学 | Method for using cyaniding barren solution to float, reclaim and cyaniding copper plumbum and zinc in tailings |
Non-Patent Citations (3)
| Title |
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| 朱磊 等: "氰化尾渣多元素资源化回收技术研究", 《环境科技》, vol. 23, no. 2, 30 April 2010 (2010-04-30) * |
| 李仕雄 等: "从氰化尾渣高效回收铜、铅、锌、硫的新工艺研究", 《湖南有色金属》, vol. 25, no. 1, 28 February 2009 (2009-02-28), pages 13 - 16 * |
| 路明福、温建波: "氰化尾渣综合回收工艺及实践", 《黄金》, 31 October 2010 (2010-10-31), pages 52 - 54 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102784722A (en) * | 2012-08-27 | 2012-11-21 | 桐柏银矿有限责任公司 | Flotation process for cyanide tailings in silver concentrates |
| CN106733205A (en) * | 2016-12-11 | 2017-05-31 | 南京银茂铅锌矿业有限公司 | The Efficient beneficiation method of troilite in lead zinc flotation tailing |
| CN107217135A (en) * | 2017-06-13 | 2017-09-29 | 山东国大黄金股份有限公司 | A kind of method of the multistage Concentration of Gold Ag-Cu-Zn of cyanidation gold-extracted waste slag and synthetical recovery |
| CN107952577A (en) * | 2017-11-30 | 2018-04-24 | 长沙三博矿业科技有限公司 | Difficulty selects cyanidation tailings preprocess method |
| CN111979412A (en) * | 2020-07-10 | 2020-11-24 | 华南师范大学 | Method for recovering lead and zinc in copper-sulfur tailings |
| CN111940149A (en) * | 2020-08-27 | 2020-11-17 | 湖北菲利华融鉴科技有限公司 | Flotation reagent |
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Application publication date: 20120620 |