CN1618742A - Method of treating nonferrons metal mine acidic waste water source - Google Patents
Method of treating nonferrons metal mine acidic waste water source Download PDFInfo
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- CN1618742A CN1618742A CN 200410061174 CN200410061174A CN1618742A CN 1618742 A CN1618742 A CN 1618742A CN 200410061174 CN200410061174 CN 200410061174 CN 200410061174 A CN200410061174 A CN 200410061174A CN 1618742 A CN1618742 A CN 1618742A
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Abstract
A process for radically treating the acidic sewage of non-ferrous metal mine includes spreading the alkaline ore tailings on the sulfide ore body, waste rock stack, mining surface and slope, periodically spraying the alkaline sewage (alkaline liquid, ore concentrate overflow liquid, and tailings overflow liquid) generated by dressing the non-ferrous metal ore, and collecting the osmotic liquid for reusing it for ore dressing.
Description
Technical field
A kind of method of the acid waste water watershed management to nonferrous metal mine belongs to the mine environmental technology field particularly reduces the nonferrous metal mine sulfur compound from the source ore body, ore storage, and hillock, exposed side slope, mining face produces the method for acid waste water.
Background technology
The nonferrous metal mine of sulfur compound, particularly in rainwater geographic mining area on the high side, under the bio-catalytical oxidation effect of having a liking for thiobacillus and other ore-leaching bacterias, airborne oxygen, thereby water and sulfide acting in conjunction produce the acid waste water of a large amount of sulfur-bearing acid groups and heavy metal ion, and the dissolving that more helps having a liking for the effect of thiobacillus and other ore-leaching bacterias under the acidic conditions and help heavy metal ion.Thereby increased the weight of the generation of acid waste water.Acid waste water will bring serious environmental to pollute as not handling, and treatment of acidic wastewater then brings heavier economical load to the mine because cost is higher.And metallic sulfide becomes ionic condition in the ore under acidic conditions, runs off with waste water, and the low grade ore metals resources amount that originally can be used for the follow-up exploitation in mine or carry out biological dump leaching is reduced, and influences the follow-up developments in mine.
At present, the main method that China handles acid wastewater in mine is to add lime or alkaline waste water, neutralize back up to standard discharging or reuse, and contain a large amount of sulfate ions in the acid waste water that the sulfide mineral mountain products is given birth to, add lime and easily produce calcium sulfate precipitation, cause that pipeline knot calcium stops up.Utilize in the alkaline waste water (as the concentrate overflowing liquid) and the time, the soda acid ratio of mixture is big, therefore desired treatment facility is huge, floor space is big, and easily forms hydroxide colloid in equipment, is difficult to precipitation, the water quality after influence is handled.Also there is the mine that the barren rock of output is adopted the method processing of heap one deck barren rock shop one deck lime, but finds after the several years that hillock still can produce acid waste water.
Abroad, Japan becomes ferric ion with the oxidation of divalent iron ion in the waste water earlier usually for containing ferrous higher acid wastewater in mine, its method for oxidation mainly adopts the bacterial oxidation method: utilize the oxygen Ferrobacillus that oxidation of divalent is become ferric iron, use the lime carbonate neutralization of the granularity-0.015mm of purity 98% then, this method can effectively prolong the knot calcium cycle, reduce processing cost (the price of Japanese lime carbonate only for the lime price 1/3rd) still do not have mature experience aspect the present domestic bacterial oxidation, highly purified lime carbonate raw material sources are also had any problem, and its application is restricted.
Domestic also have a patent (publication number: CN 1508079A, open day: 04.06.30) adopt milk of lime or cement slurry that saturated spray is carried out on surfaces, mine such as hillock, also lay composite plastic film covers on the surface, thereby " stop various seepages and invasion and attack ", reach the purpose of " once construction can prevent permanently that the mine from producing acid waste water ".But because hillock, the ore of ore storage is not of uniform size, is angular more, the weathering of plastic film cracky, and can't stop underground water for a long time to the infiltration invasion and attack effect of hillock.More since in the recovery process in mine barren rock in continuous generation, the cut-off grade of barren rock also changes because of the variation of the raising of smelting technology and market value, the volume of hillock, side slope, position all are in continuous variation in the mining process, can't once construct just nonvolatilly to prevent that the mine from producing acid waste water at all.All everything all comes from hillock in the mining process, ore body, ore storage, the volume of mining face and side slope, the position all is in the process of dynamic change, and airborne oxygen is had a liking for ore-leaching bacteria such as thiobacillus and water the effect of metallic sulfide is under water and the phreatic promotion, is in the long-term process that continues.Thereby seek not influencing under the prerequisite that the mine produces method that the mine of can permanently effective minimizing containing sulfide mineral produces acid waste water and become a difficult problem and the urgent problem of whole world mining industry and environmental protection circle.
Summary of the invention
Content of the present invention is exactly in order to solve the difficult problem that the mine of containing sulfide produces acid waste water, the method that the permanently effective prevention of a kind of energy contains the mine generation acid waste water of sulfide has been proposed, by adopting nonferrous metal mine that ore is being carried out ball milling, the alkali solution that produces in the ore dressing process such as flotation, the concentrate overflowing liquid, alkaline waste waters such as mine tailing overflowing liquid are to the ore body of sulfur compound, ore storage, hillock, exposed side slope, the surface of mining face is carried out periodicity and is soaked filling or spray for a long time, make the sulfide surface of surface and certain depth keep alkalescence for a long time, effectively solve the environmental protection difficult problem that the mine produces acid waste water, lower simultaneously the expenses of environmental protection in mine again significantly, the heavy metal ion that acidifying simultaneously produces precipitates under alkaline condition, forms sulfuric acid thing or oxyhydroxide tectum.Through in and seepage flow purify after waste water, can be used as ore dressing water and carry out reuse.
Method of the present invention is: the alkaline waste water that adopts the nonferrous metal mine ore dressing, pH value is between 10-12, ore body to sulfur compound, ore body, ore storage, mining face and exposed side slope, mining face carries out the surface and soaks filling or spray, in order to reach better effect, the inventive method also is included in ore body, the bigger bare side sloping in hillock and crack carries out tailings and covers, and carries out alkaline waste water on the tailings surface and soak and irritate or spray, and the inventive method is also included within rainfall adds the pH value that saturated milk of lime improves alkaline waste water period in alkaline waste water simultaneously.It is multiplexing that the waste water that purifies through neutralization and seepage flow can carry out backwater as mine ore dressing water.
The present invention has compared following advantage and effect with existing method: (1) makes the long-term table in surface, mine hold weakly alkaline, and the oxidation and the acidifying (2) that can reduce sulfide long-term effectively can effectively suppress to impel the sulfide acidifying to have a liking for the growth of thiobacillus and other ore-leaching bacterias.(3) do not influencing under the mining construction condition, can reduce the mine long-term effectively and produce that acid waste water (4) purifies and the alkaline waste water that neutralized (5) is gathered materials on the spot when acid waste water is administered, purify the back recovering and reutilizing waste water, the beneficiation reagent that processing costs (6) alkaline waste water contains obtains degraded on the surface, mine, eliminate its pollution (7) and can effectively stop the metals resources of mine low grade ore to run off, be the possible reserved resources of utilizing from now on environment.
Embodiment
Present embodiment has proposed a kind of nonferrous metal mine that prevents and has produced the method for acid waste water, this inventive embodiment is to adopt the ore body of the alkaline waste water of nonferrous metal mine ore dressing generation to sulfur compound, ore storage, hillock, exposed side slope, the surface of mining face are carried out periodicity and are soaked filling or spray for a long time.Embodiment one is exactly one of following steps or whole: with pump alkaline waste water is promoted and be delivered to mine eminence overflow ditch, alkaline waste water is under the self gravitation effect, ore body, ore storage to sulfur compound, hillock, exposed side slope, mining face soak filling from top to bottom, and inapplicable hillock, the mining face that soaks filling sprayed.For the acid waste water of underground water source formula, tackle it and soak filling or spray always, in alkaline waste water, add the pH value that saturated milk of lime improves alkaline waste water period in rainfall, thereby improve the neutralising capacity of alkaline waste water.
In order to reach better effect, the present invention is further comprising the steps of: at the ore body of sulfide, hillock, mining face and side slope surface are the mine tailings of alkalescence after laying ore dressing, and carry out alkaline waste water on the tailings surface and soak filling or spray.1-6 month is one-period, generally should carry out 1 or 1 above cycle.
For in seepage flow and the water body after purifying, can collect to concentrate by irrigation canals and ditches and reuse as the mine backwater.
The alkaline waste water that embodiment two adopts the nonferrous metal mine ore dressing process to produce produces the sulfur compound ore body of acid waste water for the rainwater effect, ore storage, hillock, bare side sloping, the surface of mining face is carried out periodicity and is soaked filling or spray for a long time, soak the time of irritating or spraying in dry season is 1-10 days at every turn, stops to spray 2-20 days then, is one-period; Soak in rainy season at every turn and to irritate or the time of spray is 1-30 days, stop to spray 1-10 days then, be one-period, all will carry out periodic cycle in dry season and rainy season and soak and irritate or spray.Its subsequent step is identical with embodiment one, has not just carefully described at this.
Characteristics for different nonferrous metal mines, different acid waste water quality, and local different weather condition, topographical condition and hydrogeological conditions should adopt different soaking to irritate or the spray mode as the case may be, different soaks filling or spray time and cycle, to obtain best effect.
Characteristics of the present invention are to utilize alkaline waste water that nonferrous metal mine self ore dressing produces for a long time to the ore body of sulfur compound, ore body, and ore storage, mining face and exposed side slope, mining face carries out periodic surface and soaks and irritate or spray.Carry out acid-base neutralisation in the source of acid waste water and handle, thereby formed the alkaline environment that suppresses to have a liking for thiobacillus and the growth of other ore-leaching bacterias.And formed the tectum of metal sulfate and metal hydroxides: utilize the tailing-filled ore storage that ore dressing produces and the gap of hillock, the contact action of oxygen and sulfide in the air is reduced on the crack of side slope and mining face and surface.Irritate and spray and to transfer according to the particular case in the mining process owing to soak, its action effect is not subjected to direct influence because of the production in mine, therefore can carry out acid waste water long-term effectively administers, and also having obtained neutralization at the process neutral and alkali waste water of administering acid waste water purifies, it is multiplexing that water body after the purification can carry out backwater as mine ore dressing water, thereby reach the purpose of recycle, saved water resources and reduced environmental pollution simultaneously.
Claims (7)
1, a kind of method of the acid waste water watershed management to nonferrous metal mine is characterized in that described method is:
Adopt alkaline waste water that nonferrous metal mine produces that is periodicity carried out on the surface of the ore body of sulfur compound, ore storage, hillock, exposed side slope, mining face and soak for a long time and irritate or spray, make the sulfide surface of surface and certain depth keep alkaline for a long time.
2, the method for a kind of acid waste water watershed management to nonferrous metal mine as claimed in claim 1, it is further characterized in that, described soaking irritated or spray is meant that ore body to sulfur compound, ore storage, hillock, exposed side slope, the surface of mining face use alkaline waste water to have unnecessary liquid to flow out after filling is soaked in the gravity flow of overflow ditch; Ore storage, hillock, the mining face that is unsuitable for soaking filling sprayed, have unnecessary liquid to flow out behind the spray.
3, the method for a kind of acid waste water watershed management to nonferrous metal mine as claimed in claim 1, it is further characterized in that described alkaline waste water is meant that nonferrous metal mine is at the alkali solution, concentrate overflowing liquid, the mine tailing overflowing liquid that ore are carried out produce in the ore dressing process such as ball milling, flotation.
4, the method for a kind of acid waste water watershed management to nonferrous metal mine as claimed in claim 1 or 2, it is further characterized in that, the alkaline waste water that adopts nonferrous metal mine to produce soaks irritates or spray one of may further comprise the steps or all:
A: the sulfur compound ore body of the acid waste water that produces for groundwater effect, ore storage, hillock, bare side sloping, the surface of mining face is tackled it and is soaked always and irritate or spray.
B: for the sulfur compound ore body of rainwater effect generation acid waste water, ore storage, hillock, bare side sloping, filling or spray are carried out periodically soaking for a long time in the surface of mining face: soak the time of irritating or spraying in dry season is 1-10 days at every turn, stops to spray 2-20 days then, is one-period; Soak the time of irritating or spraying in rainy season is 1-30 days at every turn, stops to spray 1-10 days then, is one-period, is interrupted periodically to soak between dry season and rainy season and irritates or spray.
5, the method for a kind of acid waste water watershed management to nonferrous metal mine as claimed in claim 4, it is further characterized in that, can in alkaline waste water, add the pH value that saturated milk of lime improves alkaline waste water period in rainfall, thereby improve the neutralising capacity of alkaline waste water.
6, the method for a kind of acid waste water watershed management to nonferrous metal mine as claimed in claim 1 or 2, it is further characterized in that, ore body at sulfide, the mine tailings that is alkalescence is laid on hillock, mining face and side slope surface, and carry out alkaline waste water on the tailings surface and soak filling or spray, laying tailings 1-6 month is one-period, generally should carry out 1 or 1 above cycle.
7, the method for a kind of acid waste water watershed management to nonferrous metal mine as claimed in claim 2, it is further characterized in that, for effusive water body in seepage flow and after purifying, can collect by irrigation canals and ditches and concentrate, thereby form cycling utilization of wastewater as the reuse of mine ore dressing water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410061174 CN1618742A (en) | 2004-11-24 | 2004-11-24 | Method of treating nonferrons metal mine acidic waste water source |
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| CN 200410061174 CN1618742A (en) | 2004-11-24 | 2004-11-24 | Method of treating nonferrons metal mine acidic waste water source |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765830A (en) * | 2012-07-11 | 2012-11-07 | 贵州师范大学 | Reaction tank and method for treating acidic mine wastewater |
| CN102839285A (en) * | 2012-09-10 | 2012-12-26 | 合肥工业大学 | Method for recovering copper from waste mine rocks |
| CN101821205B (en) * | 2007-09-13 | 2013-06-12 | 莱茵石灰有限公司 | Method of raising the pH of acidic bodies of water |
| CN110420986A (en) * | 2019-07-29 | 2019-11-08 | 昆明理工大学 | A kind of in-situ construction method of tailing coating |
| CN115650437A (en) * | 2022-09-29 | 2023-01-31 | 金川集团股份有限公司 | Method for treating acid waste water source of nonferrous metal mine |
-
2004
- 2004-11-24 CN CN 200410061174 patent/CN1618742A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101821205B (en) * | 2007-09-13 | 2013-06-12 | 莱茵石灰有限公司 | Method of raising the pH of acidic bodies of water |
| CN102765830A (en) * | 2012-07-11 | 2012-11-07 | 贵州师范大学 | Reaction tank and method for treating acidic mine wastewater |
| CN102839285A (en) * | 2012-09-10 | 2012-12-26 | 合肥工业大学 | Method for recovering copper from waste mine rocks |
| CN102839285B (en) * | 2012-09-10 | 2014-04-23 | 合肥工业大学 | Method for recovering copper from waste mine rocks |
| CN110420986A (en) * | 2019-07-29 | 2019-11-08 | 昆明理工大学 | A kind of in-situ construction method of tailing coating |
| CN115650437A (en) * | 2022-09-29 | 2023-01-31 | 金川集团股份有限公司 | Method for treating acid waste water source of nonferrous metal mine |
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