CN104030510A - Method for recycling acid and heavy metal in gold smelting acid wastewater - Google Patents
Method for recycling acid and heavy metal in gold smelting acid wastewater Download PDFInfo
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- CN104030510A CN104030510A CN201410276313.XA CN201410276313A CN104030510A CN 104030510 A CN104030510 A CN 104030510A CN 201410276313 A CN201410276313 A CN 201410276313A CN 104030510 A CN104030510 A CN 104030510A
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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 provides a method for recycling acid and heavy metal in gold smelting acid wastewater. The method comprises the steps of: adsorbing sulfuric acid in the acid wastewater by utilizing acid adsorption resins; adding oxidizing agents for oxidizing divalent iron in the wastewater into ferric ion; adding ferrite yellow seed crystals and rising the temperature for reacting; regulating a pH value to be 1.5-4.5; separating out the iron in the waste acid in a ferrite yellow form; adding zinc powder and replacing copper in the wastewater; regulating a pH value of the water subjected to copper separation to be 6.5-8.0; precipitating out zinc hydroxide; removing the wastewater of zinc and performing reverse osmosis membrane treatment; recycling the fresh water used in reverse osmosis in the production process; performing high pressure membrane treatment on dense water for reverse osmosis; evaporating the dense water subjected to the high pressure membrane treatment to obtain salt contents of sodium sulfate; performing reverse osmosis re-treatment on the fresh water subjected to high pressure membrane treatment; regenerating by using deionized water after the saturation of acid adsorption of the acid adsorption resins to obtain 15-20 percent of sulfuric acid.
Description
Technical field
The invention belongs to gold smelting Industrial Wastewater Treatment field, relate to recovery process and the method for the acid waste water of the heavy metals such as a kind of sulfur acid and zinc-copper, particularly use the method for recovered acid and metal zinc-copper from acid waste water.
Background technology
Produce sulfuric acid and extract in the process of copper sulfate at gold smelting flue gas, produce a large amount of pickling waste waterss, its composition is roughly sulfuric acid 5%-8%, zinc 1%-2%, iron 0.1%, copper 0.03%, sodium 1-2%, magnesium 0.02%, calcium 0.01%, the treatment process of in the past taking is to add calcium oxide neutralization precipitation, treating processes produces a large amount of waste residues, these waste residues are generally used for production gypsum, but because it contains plurality of heavy metal, gypsum product is of poor quality, complex manufacturing, cost is high, price is low, without economic benefit.The technique of this routine can not reclaim the acid in pickling waste waters, and need to neutralize with a large amount of calcium oxide, and cost is high, produces a large amount of solid wastes, and the heavy metal in waste water can not reclaim, and is therefore badly in need of improving.CN103693727A discloses a kind of technique that waste residue is calcined, and can produce sulfuric acid, but calcination process energy consumption is larger, and benefit is also not obvious, and the present invention proposes the novel process of a kind of recovered acid and heavy metal for this reason.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of method that can reclaim in gold smelting acid waste water acid and heavy metal recovery.
Technical scheme of the present invention is, acid waste water is first through inhaling acid resin, sulfuric acid in absorption waste water, the ferrous iron in waste water is oxidized to ferric ion by oxidizer again, add again iron oxide seed crystal temperature reaction, adjust pH is to 1.5-4.5, iron in spent acid is gone out with the isolated in form of iron oxide yellow, add again the copper in zinc dust precipitation waste water, analyse water after copper again adjust pH to 6.5-8.0, be settled out zinc hydroxide, can be used as zinc hydroxide crude product sells, the waste water of removing zinc passes through reverse osmosis membrane processing again, the fresh water of reverse osmosis can be back in production, reverse osmosis concentrated water goes high-pressure membrane processing, the dense water devaporation device of high-pressure membrane processing evaporates the salinities such as sodium sulfate, high-pressure membrane fresh water returns reverse osmosis and again processes.Inhale acid resin and inhale the saturated rear sulfuric acid that can obtain 15%-20% that soaks with deionized water of acid.The metal such as magnesium, calcium in waste water is removed in the step such as deironing, dezincification, and sodium ion is progressively concentrated, and in the time of the membrane separation concentrated water sodium ions content of high pressure 10% left and right, devaporation operation, evaporates sodium sulfate, can be used as sodium sulfate crude product and sells.
The advantage of present method is the valuable compounds therefroms such as sulfuric acid in can recovered acid wastewater, metallic copper, zinc hydroxide, sodium sulfate, the value reclaiming can be offset the cost of wastewater treatment, waste water can reach the requirement of reuse simultaneously, for the washing of sulfate cinder, has reduced the discharge of waste water.
Specific implementation method
Describe technical scheme of the present invention in detail below in conjunction with embodiment, but protection domain is not limited to this.
Embodiment 1
The pickling waste waters of certain solution of gold smelting plant, its composition is roughly sulfuric acid 5%, zinc 1%, iron 0.15%, copper 0.03%, sodium 2%, magnesium 0.02%, calcium 0.01%, transparent micro-Huang, enter to inhale acid resin bed adsorber acid, inhaling acid resin is " tough and tensile gel " strong basic type anion-exchange resin of a kind of polystyrene framework containing quaternary amine II type functional group; Add hydrogen peroxide oxidation, the ferrous iron in waste water is oxidized to ferric ion again, adds iron oxide seed crystal and is warming up to 90 DEG C of reactions, and progressively adjust pH, to 1.5-4.5, occurs iron oxide yellow precipitation, obtains iron oxide yellow after filtration; The waste water of removing after iron oxide yellow adds the copper in zinc dust precipitation waste water again, and copper and unreacted zinc remove by filter; Waste water after filtration again adjust pH, to 6.5-8.0, is settled out zinc hydroxide, containing zinc hydroxide 85-90%, can be used as zinc hydroxide crude product and sells; The waste water of removing zinc passes through reverse osmosis membrane processing again, and the fresh water of reverse osmosis can be back in production, and reverse osmosis concentrated water goes high-pressure membrane processing; High-pressure membrane is processed sodium sulfate 15% in rear dense water, and devaporation device evaporates the salinities such as sodium sulfate, and high-pressure membrane fresh water returns reverse osmosis and again processes.
Inhale acid resin and inhale the saturated rear sulfuric acid that can obtain 15% that soaks with deionized water of acid.
Brief description of the drawings:
Accompanying drawing 1 is the process flow diagram of the method that in a kind of gold smelting acid waste water of the present invention, acid and heavy metal reclaim.
Claims (2)
1. the method that in gold smelting acid waste water, acid and heavy metal reclaim, is characterized in that, adopts following steps:
Acid waste water is first through inhaling acid resin, sulfuric acid in absorption waste water, the ferrous iron in waste water is oxidized to ferric ion by oxidizer again, add again iron oxide seed crystal temperature reaction, adjust pH is to 1.5-4.5, iron in spent acid is gone out with the isolated in form of iron oxide yellow, add again the copper in zinc dust precipitation waste water, analyse water after copper again adjust pH to 6.5-8.0, be settled out zinc hydroxide, the waste water of removing zinc passes through reverse osmosis membrane processing again, the fresh water of reverse osmosis can be back in production, reverse osmosis concentrated water goes high-pressure membrane processing, the dense water devaporation device of high-pressure membrane processing evaporates the salinities such as sodium sulfate, high-pressure membrane fresh water returns reverse osmosis and again processes.Inhale acid resin and inhale the saturated rear sulfuric acid that obtains 15%-20% with deionized water regeneration of acid.
2. method according to claim 1, is characterized in that, the oxygenant of selecting is hydrogen peroxide, clorox, ozone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410276313.XA CN104030510B (en) | 2014-06-10 | 2014-06-10 | A kind of method of acid and heavy metal recovery in gold smelting acid waste water |
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| CN201410276313.XA CN104030510B (en) | 2014-06-10 | 2014-06-10 | A kind of method of acid and heavy metal recovery in gold smelting acid waste water |
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| CN104030510A true CN104030510A (en) | 2014-09-10 |
| CN104030510B CN104030510B (en) | 2016-03-02 |
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| CN201410276313.XA Expired - Fee Related CN104030510B (en) | 2014-06-10 | 2014-06-10 | A kind of method of acid and heavy metal recovery in gold smelting acid waste water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859000A (en) * | 2016-04-05 | 2016-08-17 | 紫金矿业集团股份有限公司 | Gold smelting wastewater treatment technology |
| CN106119547A (en) * | 2016-07-20 | 2016-11-16 | 中国恩菲工程技术有限公司 | A kind of method reclaiming copper in the outer waste discharge acid of Copper making system for preparing sulfuric acid |
| CN109824169A (en) * | 2019-03-04 | 2019-05-31 | 广东益诺欧环保股份有限公司 | The method and system of acid solution in a kind of recycling acid waste water |
| CN113402092A (en) * | 2021-04-30 | 2021-09-17 | 浙江省遂昌金矿有限公司 | Process for recovering valuable metals from smelting waste liquid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803658A (en) * | 2006-01-16 | 2006-07-19 | 深圳市危险废物处理站 | Deferrization method of iron-containing liquor |
| CN101992133A (en) * | 2009-08-24 | 2011-03-30 | 李冶强 | Method for processing and recycling waste acid |
| JP2012196634A (en) * | 2011-03-22 | 2012-10-18 | Miura Co Ltd | Method and system for treatment of water |
| CN103319042A (en) * | 2013-07-16 | 2013-09-25 | 北京倍杰特国际环境技术有限公司 | High-salt complex wastewater reuse and zero discharge integrated equipment and technology |
| CN103374743A (en) * | 2012-04-26 | 2013-10-30 | 富葵精密组件(深圳)有限公司 | Electroplating system and waste water treatment method |
-
2014
- 2014-06-10 CN CN201410276313.XA patent/CN104030510B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803658A (en) * | 2006-01-16 | 2006-07-19 | 深圳市危险废物处理站 | Deferrization method of iron-containing liquor |
| CN101992133A (en) * | 2009-08-24 | 2011-03-30 | 李冶强 | Method for processing and recycling waste acid |
| JP2012196634A (en) * | 2011-03-22 | 2012-10-18 | Miura Co Ltd | Method and system for treatment of water |
| CN103374743A (en) * | 2012-04-26 | 2013-10-30 | 富葵精密组件(深圳)有限公司 | Electroplating system and waste water treatment method |
| CN103319042A (en) * | 2013-07-16 | 2013-09-25 | 北京倍杰特国际环境技术有限公司 | High-salt complex wastewater reuse and zero discharge integrated equipment and technology |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859000A (en) * | 2016-04-05 | 2016-08-17 | 紫金矿业集团股份有限公司 | Gold smelting wastewater treatment technology |
| CN105859000B (en) * | 2016-04-05 | 2019-03-08 | 紫金矿业集团股份有限公司 | A kind of gold smelting waste water treatment process |
| CN106119547A (en) * | 2016-07-20 | 2016-11-16 | 中国恩菲工程技术有限公司 | A kind of method reclaiming copper in the outer waste discharge acid of Copper making system for preparing sulfuric acid |
| CN109824169A (en) * | 2019-03-04 | 2019-05-31 | 广东益诺欧环保股份有限公司 | The method and system of acid solution in a kind of recycling acid waste water |
| CN113402092A (en) * | 2021-04-30 | 2021-09-17 | 浙江省遂昌金矿有限公司 | Process for recovering valuable metals from smelting waste liquid |
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| CN104030510B (en) | 2016-03-02 |
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