CN101920939B - Method for recycling waste acid of gold concentrate smelting smoke acid preparation system - Google Patents
Method for recycling waste acid of gold concentrate smelting smoke acid preparation system Download PDFInfo
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- CN101920939B CN101920939B CN2010102553398A CN201010255339A CN101920939B CN 101920939 B CN101920939 B CN 101920939B CN 2010102553398 A CN2010102553398 A CN 2010102553398A CN 201010255339 A CN201010255339 A CN 201010255339A CN 101920939 B CN101920939 B CN 101920939B
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Abstract
The invention belongs to the technical field of wet metallurgy, in particular discloses a method for recycling waste acid of a gold concentrate smelting smoke acid preparation system. The method comprises the following steps of: at normal temperature, adding precipitants into the waste acid with stirring; and after reaction, separating solids from liquid, recycling filtrate and stacking filtration residues, wherein 0.5 to 2g of the precipitants are added into per liter of the waste acid with the acidity of 10 to 15 percent; the precipitants are the mixture of sulfides, filter aids and the surfactants in a molar ratio of 1.0-1.5:0.08-0.12:0.02-0.06; the sulfides are one or the mixture of more than two of sodium sulfide, ammonium sulfide and iron sulfide; the filter aids are one or the mixture of calcium oxide and calcium carbonate; and the surfactants are cetyl trimethyl ammonium bromide. The method realizes the low-cost, low-pollution and high-efficiency recycling of the waste acid and reduces environmental pollution.
Description
Technical field
The invention belongs to technical field of wet metallurgy, be specifically related to a kind of recoverying and utilizing method of waste acid of gold concentrate smelting smoke acid preparation system.
Background technology
The SO that produces after the roasting of gold smelting industry
2Flue gas all is used for preparing sulfuric acid, but all can produce the spent acid that quantity does not wait in this process.This part spent acid is because foreign matter content is high, and general difficulty is utilized.
At present; The treatment process of smelting industry spent acid mainly contains following two kinds: 1, alkaline matter neutralisation; Promptly utilize alkaline matter,, make arsenic, fluorine, heavy metal ion and sulfate radical etc. in the spent acid form the indissoluble material as in Wingdale, milk of lime, carbide slag and other waste lye and spent acid; Through precipitate and separate, solid mine dust and toxic substance are separated from dirty acid.The shortcoming of this method is that cost is high, energy consumption is high, and wherein valuable element, spent acid do not reclaim, and cause the wasting of resources, and consume a large amount of lime, need take the mine tailing storehouse and stack.2, sulfuration-neutralisation, this method are to utilize sulfide, like Na
2S, the reaction of NaHS etc. and spent acid makes copper in the acidic solution, zinc, arsenic etc. and sulfide form CuS, ZnS, the As of indissoluble
2S
3Deposition is separated from solution.Spent acid after the separation, discharging after neutralisation is handled.This method can produce hydrogen sulfide inevitably, and therefore, considered is the hydrogen sulfide recovery measure effectively.And the treatment process of above-mentioned two kinds of spent acid is not carried out recycle after all spent acid being handled.
Summary of the invention
The object of the present invention is to provide a kind of recoverying and utilizing method of waste acid of gold concentrate smelting smoke acid preparation system.
For realizing above-mentioned purpose, the technical scheme that the present invention takes is following:
A kind of recoverying and utilizing method of waste acid of gold concentrate smelting smoke acid preparation system: under the normal temperature condition; In spent acid, add precipitation agent while stirring; After reaction finishes, solid-liquid separation, filtrate cycle utilization; Filter residue is stored up; Wherein every liter of acidity is to add the precipitation agent of 0.5～2g in 10～15% the spent acid, and said precipitation agent is that mol ratio is (1.0～1.5): (0.08～0.12): the sulfide of (0.02～0.06), flocculating aids and surfactant mixtures, said sulfide are one or more the compsn in sodium sulphite, ammonium sulfide, the iron sulphide; Said flocculating aids is a kind of in quicklime, the lime carbonate or both compsns, and said tensio-active agent is a cetyl trimethylammonium bromide.
Preferably, the reaction times is 10～60min.
Preferably, the rotating speed of said stirring is 50～200rpm.
Spent acid acidity among the present invention is meant the shared mass percent of spent acid in the whole waste acid liquor.
The precipitation agent that adopts among the present invention is the mixture of sulfide and acvator, and this reagent has not only solved harmful element problems such as the copper in the spent acid, zinc, mercury, arsenic, has also improved the strainability of these heavy metal precipitations simultaneously greatly.
The character that the present invention is directed to spent acid adopts the precipitator method; In acid system, harmful elements such as the copper in the spent acid, zinc, mercury, arsenic are precipitated, carry out solid-liquid separation then, the spent acid recycle after the separation; Reach low-cost, the low spent acid that pollutes, reclaims expeditiously, reduce environmental pollution.
Embodiment
Below in conjunction with specific embodiment technical scheme of the present invention is done into a ground and introduce in detail, but protection scope of the present invention is not limited thereto:
Embodiment 1
Under the normal temperature condition, be in the spent acid of 10% (quality) in 500ml acidity, the limit is stirred (rotating speed is 100rpm) limit and is added the 0.25g precipitation agent; Behind the reaction 30min, carry out solid-liquid separation through the press filtration sheet frame, filtrating is squeezed into the acid leaching residue operation in the gold concentrate smelting technology through pump; With recycle residual acid wherein; Filter residue is stored up, and said precipitation agent is that mol ratio is 1.0: 0.08: 0.02 sulfide, flocculating aids and a surfactant mixtures, and said sulfide is sodium sulphite; Said flocculating aids is a quicklime, and said tensio-active agent is a cetyl trimethylammonium bromide.
Embodiment 2
Be with the difference of embodiment 1: said sulfide is ammonium sulfide, and other is all with embodiment 1.
Embodiment 3
Be with the difference of embodiment 1: said sulfide is iron sulphide, and said flocculating aids is a lime carbonate, and other is all with embodiment 1.
Embodiment 4
Under the normal temperature condition; In 500ml acidity is in the spent acid of 15% (quality), and the limit is stirred (rotating speed is 50rpm) limit and added the 1g precipitation agent, behind the reaction 60min; Carry out solid-liquid separation through the press filtration sheet frame; Filtrating is squeezed into the acid leaching residue operation in the gold concentrate smelting technology through pump, and with recycle residual acid wherein, filter residue is stored up; Said precipitation agent is that mol ratio is 1.5: 0.12: 0.06 sulfide, flocculating aids and a surfactant mixtures; Said sulfide is sodium sulphite: ammonium sulfide: the compsn of iron sulphide=1: 1: 1 (mol ratio), said flocculating aids are lime carbonate: the compsn of lime carbonate=1: 1 (mol ratio), said tensio-active agent are cetyl trimethylammonium bromide.
Embodiment 5
Under the normal temperature condition, be in the spent acid of 12% (quality) in 500ml acidity, the limit is stirred (rotating speed is 200rpm) limit and is added the 0.6g precipitation agent; Behind the reaction 10min, carry out solid-liquid separation through the press filtration sheet frame, filtrating is squeezed into the acid leaching residue operation in the gold concentrate smelting technology through pump; With recycle residual acid wherein; Filter residue is stored up, and said precipitation agent is that mol ratio is 1.2: 0.1: 0.04 sulfide, flocculating aids and a surfactant mixtures, and said sulfide is ammonium sulfide: the compsn of iron sulphide=1: 2 (mol ratio); Said flocculating aids is a quicklime: the compsn of lime carbonate=1: 2 (mol ratio), said tensio-active agent are cetyl trimethylammonium bromide.
Claims (3)
1. the recoverying and utilizing method of a waste acid of gold concentrate smelting smoke acid preparation system; It is characterized in that: under the normal temperature condition, in spent acid, add precipitation agent while stirring, after reaction finishes; Solid-liquid separation; Filtrate cycle is utilized, and filter residue is stored up, and wherein every liter of acidity is to add the precipitation agent of 0.5～2g in 10～15% the spent acid; Said precipitation agent is that mol ratio is (1.0～1.5): (0.08～0.12): the sulfide of (0.02～0.06), flocculating aids and surfactant mixtures; Said sulfide is one or more the compsn in sodium sulphite, ammonium sulfide, the iron sulphide, and said flocculating aids is a kind of in quicklime, the lime carbonate or both compsns, and said tensio-active agent is a cetyl trimethylammonium bromide.
2. the recoverying and utilizing method of waste acid of gold concentrate smelting smoke acid preparation system as claimed in claim 1, it is characterized in that: the reaction times is 10～60min.
3. according to claim 1 or claim 2 the recoverying and utilizing method of waste acid of gold concentrate smelting smoke acid preparation system, it is characterized in that: the rotating speed of stirring is 50～200rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102553398A CN101920939B (en) | 2010-08-17 | 2010-08-17 | Method for recycling waste acid of gold concentrate smelting smoke acid preparation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102553398A CN101920939B (en) | 2010-08-17 | 2010-08-17 | Method for recycling waste acid of gold concentrate smelting smoke acid preparation system |
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| CN101920939A CN101920939A (en) | 2010-12-22 |
| CN101920939B true CN101920939B (en) | 2012-07-04 |
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| CN2010102553398A Active CN101920939B (en) | 2010-08-17 | 2010-08-17 | Method for recycling waste acid of gold concentrate smelting smoke acid preparation system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115010185A (en) * | 2022-06-10 | 2022-09-06 | 马钢(合肥)钢铁有限责任公司 | Production method of battery-grade ferrous chloride |
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2010
- 2010-08-17 CN CN2010102553398A patent/CN101920939B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 张圣南.铅锌冶炼烟气制酸净化工艺的污酸处理.《世界有色金属》.2010,44-45. * |
| 李迪汉.铅锌冶炼烟气制酸废水处理工艺研究.《湖南有色金属》.2005,第21卷(第3期),30-32. * |
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