CN103831165B - High containing arsenic gold cyanidation tailings method for innocent treatment - Google Patents
High containing arsenic gold cyanidation tailings method for innocent treatment Download PDFInfo
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Abstract
A kind of high containing arsenic gold cyanidation tailings method for innocent treatment, golden cyanidation tailings is mainly carried out twice fragmentation by it, then send into ball mill and carry out ore grinding, sodium carbonate is added during ball milling, vulcanized sodium and waterglass, mineral are disperseed fully, sulfuration, the ph value of adjustment ore pulp is 8-9, after classification, coarse sand returns ball mill and regrinds, fine sand after overflow is qualified enters agitator and sizes mixing, xanthate is added in fine sand, after copper sulphate is sized mixing, adopt one roughing twice selected floatation process scanned for twice again, make selected after product sell as mineral, mine tailing after scanning is raised after adding bleaching powder and is delivered to Tailings Dam, Tailings Dam overflow water is sent ore dressing plant back to and is recycled after clarification.After the inventive method process, the arsenic content in mine tailing significantly reduces, but also has reclaimed a large amount of useful mineral.
Description
Technical field
The present invention relates to the golden cyanidation tailings method for innocent treatment that a kind of golden cyanidation tailings method for innocent treatment, particularly a kind of arsenic content are high.
Background technology
Cyanidation tailings is that gold ore puies forward the many metal waste residue of terminal of acidity, alkalescence, hypertoxic cyanide ion and the heavy metal component produced after gold through cyanide heap leaching technique, generally stores up as gangue solids discarded object.The heap of cyanidation tailings is abandoned and is taken a large amount of soil, and waste mineral resources, hypertoxic cyanide ion and heavy metal ion serious environment pollution, also can cause the serious accident such as landslide, mud-rock flow.
In mining area, yueyang, hunan gold hole and periphery adopt cyanide heap leaching technique to pan gold ore out a large amount of waste residues left in history, because the dump leaching time is long, cause metalliferous mineral cementing, oxidation in a large number, passivation, the weathering of cyaniding waste residue seriously in khaki and blackyellow, cementing reunion, be oxidized terrible; Viscosity is heavy, water content is high, has the heavy metal contaminants such as certain density cyanide, arsenic and lead, and is mingled with the foreign material such as mudstone, plant, do a lot of damage to surrounding ecological environment, serious environment pollution.
Summary of the invention
Technical problem to be solved by this invention is, the rate of recovery for cyanidation tailings process in prior art is low, qualified products can not be obtained, and containing hypertoxic cyanide ion and heavy metal ion, the problem of serious environment pollution, the invention provides a kind of high containing arsenic gold cyanidation tailings method for innocent treatment, it can reduce the arsenic content in tailings, make cyanidation tailings be the Ith class general industrial solid waste by the IIth class general industrial solid waste transition, reclaim wherein gold mine simultaneously.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of high containing arsenic gold cyanidation tailings method for innocent treatment, it comprises the following steps:
1), broken: golden cyanidation tailings disintegrating machine to be carried out twice fragmentation, make the granularity of golden cyanidation tailings be not more than 10mm;
2), grind: the golden cyanidation tailings after fragmentation is sent into ball mill, and in ball mill, add sodium carbonate, vulcanized sodium, waterglass and suitable quantity of water grind, wherein the addition of sodium carbonate is 1000g/t, the addition of vulcanized sodium is 200g/t, the addition of waterglass is 100g/t, and the addition of water will make ore milling concentration reach 70%;
3), classification: the cyanidation tailings after grinding is sent into classification in grader, the coarse granule being in grader rear end returns ball mill and regrinds, be in grader front end and in overflow, granularity is less than 200 object particles when having accounted for 65% of overflow total amount, overflow enters agitator and sizes mixing;
4), size mixing: add xanthate, copper sulphate and terpenic oil in the cyanidation tailings in agitator and at room temperature mix, wherein the addition of xanthate is 200g/t, and the addition of copper sulphate is 120g/t, and the addition of terpenic oil is 60g/t;
5), flotation: the cyanidation tailings after sizing mixing first is sent in flotation cell and roughly selects, tailings after roughly selecting forms mine tailing after scanning through twice again, send into Tailings Dam landfill after adding bleaching powder in mine tailing, Tailings Dam overflow water is sent ore dressing plant back to and is recycled after clarification; Gold Concentrate under Normal Pressure is formed after concentrate after roughly selecting is selected through twice again.
Being improved to further of such scheme, ball mill adopts 2736 overflowball mills, adopts 8 meters
3pneumatic flotation cell as roughly selecting and scanning equipment, adopt 2.8 meters
3mechanical agitation flotation cell as picking equipment.
Being improved to further of such scheme, adds the xanthate of 90g/t when first time scans, add the xanthate of 40g/t and the terpenic oil of 40g/t when second time is scanned.Wherein xanthate is as flotation collector.Terpenic oil has another name called No. 2 oil, is a kind of foaming medicament.
Being improved to further of such scheme, Tailings Dam overflow water is sent ore dressing plant back to and is recycled after sewage disposal system clarification.
Golden cyanidation tailings is carried out twice fragmentation by the present invention, then send into ball mill to grind, add sodium carbonate at the charging aperture of ball mill simultaneously, vulcanized sodium and waterglass, mineral are disperseed fully, sulfuration, the ph value of adjustment ball milling liquid is 8-9, with grader, classification is carried out to mineral again, coarse sand returns ball mill and regrinds, slurries after overflow is qualified enter agitator and size mixing, add xanthate (as collecting agent), copper sulphate (as activator), terpenic oil (No. 2 oil, as foaming agent) size mixing together after, adopt one roughing twice selected floatation process scanned for twice again, raise through pumping plant after adding bleaching powder in mine tailing after scanning and deliver to Tailings Dam, in mine tailing, heavy metal arsenic clearance reaches 83%, cyanidation tailings is made to be the Ith class general industrial solid waste by the IIth class general industrial solid waste transition, and Tailings Dam overflow water can adopt fixed pump station to raise to send ore dressing plant back to and recycles after clarification.After selected through twice, the golden comprehensive recovery in cyanidation tailings reaches 60%.
Through experimental verification, by flotation and selected, mineral in cyaniding waste residue are recycled, the tailings (tailings productive rate is 97.35%) produced after scanning enters Tailings Dam, learnt by tailings toxicity characteristic leaching procedure result, tailings after the invention process has become the Ith class general industrial solid waste, and arsenic ion content is also reduced to 0.272mg/L by the 1.607mg/L before flotation, and the leaching concentration rate of descent of its As is about 83.1%.As can be seen here; carry out in floatation process to tailings; heavy metal ion existence form shifts to some extent; in concentrate product after arsenic compound more than 60% is enriched in and roughly selects; all the other majority of compounds generate water-fast calcium arsenate solid after reacting with the soda lime (sodium carbonate) shielded in ball mill; store in Tailings Dam, the heavy metal ion in external draining has good emission reduction effect.And the waste water in cyaniding waste residue ore dressing plant after treatment fully recovering in production, realize zero-emission, be stored in Tailings Dam to its tailings after cyanidation tailings is carried out recycling, storehouse is closed after treating engineering construction, and carry out revegetation, not only fundamentally eliminate the pollution of cyaniding waste residue to environment, and certain economic benefit can be brought.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Detailed description of the invention
As shown in Figure 1, the present invention is a kind of high containing arsenic gold cyanidation tailings method for innocent treatment, comprises the following steps:
1), broken: golden cyanidation tailings disintegrating machine to be carried out twice fragmentation, make the granularity of golden cyanidation tailings be not more than 10mm;
2), grind: the golden cyanidation tailings after fragmentation is sent into ball mill, and in ball mill, add sodium carbonate, vulcanized sodium, waterglass and suitable quantity of water grind, wherein the addition of sodium carbonate is 1000g/t, the addition of vulcanized sodium is 200g/t, the addition of waterglass is 100g/t, and the addition of water will make ore milling concentration reach 70%;
3), classification: the cyanidation tailings after grinding is sent into classification in grader, the coarse granule being in grader rear end returns ball mill and regrinds, be in grader front end and in overflow, granularity is less than 200 object particles when having accounted for 65% of overflow total amount, overflow enters agitator and sizes mixing;
4), size mixing: add xanthate, copper sulphate and terpenic oil in the cyanidation tailings in agitator and at room temperature mix, wherein the addition of xanthate is 200g/t, and the addition of copper sulphate is 120g/t, and the addition of terpenic oil is 60g/t;
5), flotation: the cyanidation tailings after sizing mixing first is sent in flotation cell and roughly selects, tailings after roughly selecting forms mine tailing after scanning through twice again, send into Tailings Dam landfill after adding bleaching powder in mine tailing, Tailings Dam overflow water is sent ore dressing plant back to and is recycled after clarification; Gold Concentrate under Normal Pressure is formed after concentrate after roughly selecting is selected through twice again.
Wherein, ball mill adopts 2736 overflowball mills, adopts 8 meters
3pneumatic flotation cell as roughly selecting and scanning equipment, adopt 2.8 meters
3mechanical agitation flotation cell as picking equipment.First time adds xanthate as collecting agent when scanning, and add xanthate and No. 2 oil when second time is scanned, xanthate is as collecting agent, and No. 2 oil are as foaming agent.Tailings Dam overflow water is sent ore dressing plant back to and is recycled after sewage disposal system clarification.
Claims (4)
1. high containing an arsenic gold cyanidation tailings method for innocent treatment, it is characterized in that comprising the following steps:
1), broken: golden cyanidation tailings disintegrating machine to be carried out twice fragmentation, make the granularity of cyanidation tailings be not more than 10mm;
2), grind: the cyanidation tailings after fragmentation is sent into ball mill, and in ball mill, add sodium carbonate, vulcanized sodium, waterglass and suitable quantity of water grind, wherein the addition of sodium carbonate is 1000g/t, the addition of vulcanized sodium is 200g/t, the addition of waterglass is 100g/t, and the addition of water will make ore milling concentration reach 70%;
3), classification: the cyanidation tailings after grinding is sent into classification in grader, the coarse granule being in grader rear end returns ball mill and regrinds, be in grader front end and in overflow, granularity is less than 200 object particles when having accounted for 65% of overflow total amount, overflow enters agitator and sizes mixing;
4), size mixing: add xanthate, copper sulphate and terpenic oil in the cyanidation tailings in agitator and at room temperature mix, wherein the addition of xanthate is 200g/t, and the addition of copper sulphate is 120g/t, and the addition of terpenic oil is 60g/t;
5), flotation: the cyanidation tailings after sizing mixing first is sent in flotation cell and roughly selects, tailings after roughly selecting forms mine tailing after scanning through twice again, in this mine tailing, heavy metal arsenic clearance reaches 83%, cyanidation tailings is made to be the Ith class general industrial solid waste by the IIth class general industrial solid waste transition, then, send into Tailings Dam landfill add bleaching powder in mine tailing after, Tailings Dam overflow water is sent ore dressing plant back to and is recycled after clarification; Gold Concentrate under Normal Pressure is formed after concentrate after roughly selecting is selected through twice again.
2. height according to claim 1 is containing arsenic gold cyanidation tailings method for innocent treatment, and it is characterized in that, ball mill adopts 2736 overflowball mills, adopts 8 meters
3pneumatic flotation cell as roughly selecting and scanning equipment, adopt 2.8 meters
3mechanical agitation flotation cell as picking equipment.
3. height according to claim 1 is containing arsenic gold cyanidation tailings method for innocent treatment, it is characterized in that, adds the xanthate of 90g/t when first time scans, add the xanthate of 40g/t and the terpenic oil of 40g/t when second time is scanned.
4. height according to claim 1 is containing arsenic gold cyanidation tailings method for innocent treatment, and it is characterized in that, Tailings Dam overflow water is sent ore dressing plant back to and recycled after sewage disposal system clarification.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104148188A (en) * | 2014-08-06 | 2014-11-19 | 哈巴河金坝矿业有限公司 | Method and device for gold extraction through cyanide-leaching residues |
| CN104722408B (en) * | 2014-11-24 | 2017-02-22 | 贵州紫金矿业股份有限公司 | Method for recycling gold in cyanided tailings in ramified and series flotation mode |
| CN110022984B (en) * | 2016-10-20 | 2022-06-03 | 新南创新私人有限公司 | Method for removing heavy metals from aqueous solutions |
| CN107952577B (en) * | 2017-11-30 | 2019-09-13 | 长沙三博矿业科技有限公司 | Difficulty selects cyanidation tailings preprocess method |
| CN107952590B (en) * | 2017-11-30 | 2019-09-13 | 长沙三博矿业科技有限公司 | The method of gold is recycled from cyanidation tailings |
| CN111940148A (en) * | 2020-07-27 | 2020-11-17 | 莱州市鸿铖矿业环保开发有限公司 | Comprehensive utilization and harmless treatment method for cyanidation tailings |
| CN114308396B (en) * | 2021-11-30 | 2024-01-12 | 招远市招金金合科技有限公司 | Method for high-value utilization of sulfur, iron and gold in cyanidation tailings |
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