CN102719670B - Method for purifying liquid after arsenic sedimentation by adopting sulfuric acid cinder - Google Patents
Method for purifying liquid after arsenic sedimentation by adopting sulfuric acid cinder Download PDFInfo
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- CN102719670B CN102719670B CN2012102018778A CN201210201877A CN102719670B CN 102719670 B CN102719670 B CN 102719670B CN 2012102018778 A CN2012102018778 A CN 2012102018778A CN 201210201877 A CN201210201877 A CN 201210201877A CN 102719670 B CN102719670 B CN 102719670B
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Abstract
The invention relates to a production method for sewage treatment, comprehensive utilization and environmental protection in gold smelting and chemical production, and particularly relates to a method for purifying liquid after arsenic sedimentation by adopting sulfuric acid cinder. The method comprises the specific steps of purifying smoke for acid making, calcining and conducting acid leaching, vulcanizing settled arsenic to prepare liquid after arsenic sedimentation, and conducting humidification, temperature reduction and arsenic fixing processing on the liquid after arsenic sedimentation in sulfuric acid cinder. According to the method for purifying liquid after arsenic sedimentation, iron in sulfuric acid cinder is utilized effectively, the neutralizing treatment step of the liquid after arsenic sedimentation in the prior art is eliminated, the purposes of humidifying sulfur acid cinder, reducing temperature and fixing arsenic are achieved, the simple and implementation as well as economy and practicability are realized, and the resource utilization ratio is high.
Description
Technical field
The present invention relates to sewage disposal in a kind of gold smelting and the Chemical Manufacture, comprehensive utilization, environment protection production method, liquid adopts the method that sulfate cinder purifies behind particularly a kind of heavy arsenic.
Background technology
In the prior art, adopt the two-stage roasting gold extraction technology to carry out relieving haperacidity and acidleach to containing arsenic carbon gold ore usually, the containing the arsenic diluted acid and contain the arsenic acid immersion liquid after vulcanizing heavy arsenic of generation, most of arsenic returns the two-stage roasting gold extraction technology with the form of red arsenic; A small amount of arsenic then need add molysite and lime and carry out neutralizing treatment, just can reach emission standard.Obviously, a small amount of arsenic behind the heavy arsenic in the liquid still needs to add molysite, aeration and neutralizing treatment, has increased processing cost and expense.The common water of sulfate cinder treatment process that traditional cyanidation gold-extracted back produces comes humidifying cooling, and this technology can consume a large amount of water, and a large amount of iron that is rich in the sulfate cinder do not obtain effective recycling, has produced a large amount of wastings of resources virtually.
Summary of the invention
Technical problem to be solved by this invention provides a kind of effective iron in the sulfate cinder that utilized, and eliminated in the prior art neutralizing treatment step of liquid behind the heavy arsenic, and reached liquid purifying method behind the heavy arsenic of sulfate cinder humidification, cooling and solid arsenic purpose.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: liquid adopts the method that sulfate cinder purifies behind a kind of heavy arsenic, it is characterized in that, may further comprise the steps:
1) contain arsenic carbon gold ore and adopt two-stage roasting after, by gas cleaning relieving haperacidity, obtain containing the arsenic dilute sulphuric acid;
2) carry out the calcining acidleach at pickling tank, agitation leach 6 hours is carried out liquid-solid separation with acid leaching ore pulp then, obtains containing the arsenic acid immersion liquid;
What 3) step 1) is obtained contains arsenic dilute sulphuric acid and step 2) the arsenic acid immersion liquid that contains that obtains adds in the tempering tank, obtains mixed solution, and mixed solution is fed vulcanize heavy arsenic in the truck for vulcanlzing pan again;
4) the liquid-solid separation of the product that step 3) is obtained, sedimentation are carried out concentrate and are sized mixing containing solid slurry, the gained supernatant liquid for heavy arsenic after liquid;
5) liquid pump behind the heavy arsenic of step 4) gained being gone into to carry out in the sulfate cinder humidification, cooling and solid arsenic handles;
6) sulfate cinder of step 5) after humidification, cooling and solid arsenic are handled transferred to the stockyard.
The invention has the beneficial effects as follows: simple, economical and practical, resource utilization is high; not only reach the requirement of solidifying arsenic; the harm of elimination arsenic; save liquid neutralizing treatment step behind the heavy arsenic; when saving cost, made full use of the iron in the sulfate cinder again, and carried out the humidifying cooling processing burning slag; turn waste into wealth, thereby further reach the purpose of eliminating harm, protection environment and increasing the business economic benefit.
On the basis of technique scheme, the present invention can also do following improvement.
Further, step 1) is described contains that to contain arsenic concentration in the arsenic dilute sulphuric acid be 700～1000mg/l.
Further, step 2) described calcining acidleach is carried out in two placed in-line pickling tanks.
Further, step 2) describedly contain that to contain arsenic concentration in the arsenic acid immersion liquid be 500～800mg/l.
Further, the heavy arsenic of the described sulfuration of step 3) carries out in two placed in-line truck for vulcanlzing pans, and the reaction times of described mixed solution in each truck for vulcanlzing pan respectively is 3 hours.
Further, containing arsenic concentration in the described mixed solution of step 3) is 500～800mg/l.
Further, being added with massfraction in the described truck for vulcanlzing pan of step 3) is 15～20% sodium sulfide solution.
Further, containing arsenic concentration in the liquid behind the described heavy arsenic of step 4) is 40～60mg/l.
Further, liquid pump is gone into before the sulfate cinder behind the heavy arsenic of step 5), and described sulfate cinder is handled through immersion cylinder and scraper plate cooling.
Further, in the step 5), liquid behind the heavy arsenic carried out moisture mass fraction is 8～12% in the sulfate cinder after humidification, cooling and solid arsenic are handled, temperature is 50～70 ℃.
Embodiment
Following institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.
Embodiment 1
After containing arsenic carbon gold ore employing two-stage roasting, it is 823.12mg/l that gas cleaning relieving haperacidity generation diluted acid contains arsenic concentration, and diluted acid enters tempering tank; The calcining acidleach is carried out acidleach through two placed in-line pickling tanks, agitation leach 6 hours, and acid leaching ore pulp carries out liquid-solid the separation through thickener with vacuum filter, and must contain arsenic concentration is the 512.62mg/l pickling liquor, enters tempering tank; It is 589.75mg/l that the diluted acid in the tempering tank and the mixed solution of pickling liquor contain arsenic concentration, and entering and being added with massfraction is that the truck for vulcanlzing pan of 15% sodium sulfide solution vulcanizes heavy arsenic; Pump into thickener after the reaction and carry out liquid-solid separation, thickener underflow carries out concentrate sizes mixing, and overflow is and contains liquid behind the heavy arsenic that arsenic concentration is 47.18mg/l, and the sulfate cinder that pumps into through cooling of immersion cylinder and scraper plate cooling carries out humidification, cooling, consolidates arsenic; The moisture massfraction that humidification, cooling, solid arsenic were handled is 9% at last, temperature is that 55 ℃ sulfate cinder transmits through belt and enters the stockyard.Through surveying, containing the arsenic massfraction in the slag behind the solid arsenic of the last gained of present embodiment is 0.012%.
Embodiment 2
After containing arsenic carbon gold ore employing two-stage roasting, it is 968.25mg/l that gas cleaning relieving haperacidity generation diluted acid contains arsenic concentration, and diluted acid enters tempering tank; The calcining acidleach is carried out acidleach through two placed in-line pickling tanks, agitation leach 6 hours, and acid leaching ore pulp carries out liquid-solid the separation through thickener with vacuum filter, and must contain arsenic concentration is the 632.33mg/l pickling liquor, enters tempering tank; It is 716.31mg/l that the diluted acid in the tempering tank and the mixed solution of pickling liquor contain arsenic concentration, and entering and being added with massfraction is that the truck for vulcanlzing pan of 16% sodium sulfide solution vulcanizes heavy arsenic; Pump into thickener after the reaction and carry out liquid-solid separation, thickener underflow carries out concentrate sizes mixing, and overflow is and contains liquid behind the heavy arsenic that arsenic concentration is 53.72mg/l, and the sulfate cinder that pumps into through cooling of immersion cylinder and scraper plate cooling carries out humidification, cooling, consolidates arsenic; The moisture massfraction that humidification, cooling, solid arsenic were handled is 11% at last, temperature is that 60 ℃ sulfate cinder transmits through belt and enters the stockyard.Through surveying, containing the arsenic massfraction in the slag behind the solid arsenic of the last gained of present embodiment is 0.014%.
Embodiment 3
After containing arsenic carbon gold ore employing two-stage roasting, it is 885.46mg/l that gas cleaning relieving haperacidity generation diluted acid contains arsenic concentration, and diluted acid enters tempering tank; The calcining acidleach is carried out acidleach through two placed in-line pickling tanks, agitation leach 6 hours, and acid leaching ore pulp carries out liquid-solid the separation through thickener with vacuum filter, and must contain arsenic concentration is the 768.50mg/l pickling liquor, enters tempering tank; It is 797.74mg/l that the diluted acid in the tempering tank and the mixed solution of pickling liquor contain arsenic concentration, and entering and being added with massfraction is that the truck for vulcanlzing pan of 17% sodium sulfide solution vulcanizes heavy arsenic; Pump into thickener after the reaction and carry out liquid-solid separation, thickener underflow carries out concentrate sizes mixing, and overflow is and contains liquid behind the heavy arsenic that arsenic concentration is 57.28mg/l, and the sulfate cinder that pumps into through cooling of immersion cylinder and scraper plate cooling carries out humidification, cooling, consolidates arsenic; The moisture massfraction that humidification, cooling, solid arsenic were handled is 10% at last, temperature is that 65 ℃ sulfate cinder transmits through belt and enters the stockyard.Through surveying, containing the arsenic massfraction in the slag behind the solid arsenic of the last gained of present embodiment is 0.015%.
Embodiment 4
After containing arsenic carbon gold ore employing two-stage roasting, it is 700.00mg/l that gas cleaning relieving haperacidity generation diluted acid contains arsenic concentration, and diluted acid enters tempering tank; The calcining acidleach is carried out acidleach through two placed in-line pickling tanks, agitation leach 6 hours, and acid leaching ore pulp carries out liquid-solid the separation through thickener with vacuum filter, and must contain arsenic concentration is the 500.00mg/l pickling liquor, enters tempering tank; It is 500.00mg/l that the diluted acid in the tempering tank and the mixed solution of pickling liquor contain arsenic concentration, and entering and being added with massfraction is that the truck for vulcanlzing pan of 18% sodium sulfide solution vulcanizes heavy arsenic; Pump into thickener after the reaction and carry out liquid-solid separation, thickener underflow carries out concentrate sizes mixing, and overflow is and contains liquid behind the heavy arsenic that arsenic concentration is 40.00mg/l, and the sulfate cinder that pumps into through cooling of immersion cylinder and scraper plate cooling carries out humidification, cooling, consolidates arsenic; The moisture massfraction that humidification, cooling, solid arsenic were handled is 8% at last, temperature is that 50 ℃ sulfate cinder transmits through belt and enters the stockyard.Through surveying, containing the arsenic massfraction in the slag behind the solid arsenic of the last gained of present embodiment is 0.011%.
Embodiment 5
After containing arsenic carbon gold ore employing two-stage roasting, it is 1000.00mg/l that gas cleaning relieving haperacidity generation diluted acid contains arsenic concentration, and diluted acid enters tempering tank; The calcining acidleach is carried out acidleach through two placed in-line pickling tanks, agitation leach 6 hours, and acid leaching ore pulp carries out liquid-solid the separation through thickener with vacuum filter, and must contain arsenic concentration is the 800.00mg/l pickling liquor, enters tempering tank; It is 800.00mg/l that the diluted acid in the tempering tank and the mixed solution of pickling liquor contain arsenic concentration, and entering and being added with massfraction is that the truck for vulcanlzing pan of 20% sodium sulfide solution vulcanizes heavy arsenic; Pump into thickener after the reaction and carry out liquid-solid separation, thickener underflow carries out concentrate sizes mixing, and overflow is and contains liquid behind the heavy arsenic that arsenic concentration is 60.00mg/l, and the sulfate cinder that pumps into through cooling of immersion cylinder and scraper plate cooling carries out humidification, cooling, consolidates arsenic; The moisture massfraction that humidification, cooling, solid arsenic were handled is 12% at last, temperature is that 70 ℃ sulfate cinder transmits through belt and enters the stockyard.Through surveying, containing the arsenic massfraction in the slag behind the solid arsenic of the last gained of present embodiment is 0.016%.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method that liquid adopts sulfate cinder to purify behind the heavy arsenic is characterized in that, may further comprise the steps:
1) contain arsenic carbon gold ore and adopt two-stage roasting after, by gas cleaning relieving haperacidity, obtain containing the arsenic dilute sulphuric acid;
2) carry out the calcining acidleach at pickling tank, agitation leach 6 hours is carried out liquid-solid separation with acid leaching ore pulp then, obtains containing the arsenic acid immersion liquid;
What 3) step 1) is obtained contains arsenic dilute sulphuric acid and step 2) the arsenic acid immersion liquid that contains that obtains adds in the tempering tank, obtains mixed solution, and mixed solution is fed vulcanize heavy arsenic in the truck for vulcanlzing pan again;
4) the liquid-solid separation of the product that step 3) is obtained, sedimentation are carried out concentrate and are sized mixing containing solid slurry, the gained supernatant liquid for heavy arsenic after liquid;
5) liquid pump behind the heavy arsenic of step 4) gained being gone into to carry out in the sulfate cinder humidification, cooling and solid arsenic handles.
2. liquid adopts the method that sulfate cinder purifies behind a kind of heavy arsenic according to claim 1, it is characterized in that, step 1) is described to contain that to contain arsenic concentration in the arsenic dilute sulphuric acid be 700～1000mg/l.
3. liquid adopts the method that sulfate cinder purifies behind a kind of heavy arsenic according to claim 1, it is characterized in that step 2) described calcining acidleach carries out in two placed in-line pickling tanks.
4. the method that adopts sulfate cinder to purify according to liquid behind the described a kind of heavy arsenic of one of claim 1 to 3 is characterized in that step 2) describedly contain that to contain arsenic concentration in the arsenic acid immersion liquid be 500～800mg/l.
5. liquid adopts the method that sulfate cinder purifies behind a kind of heavy arsenic according to claim 1, it is characterized in that, the heavy arsenic of the described sulfuration of step 3) carries out in two placed in-line truck for vulcanlzing pans, and the reaction times of described mixed solution in each truck for vulcanlzing pan respectively is 3 hours.
6. the method that adopts sulfate cinder to purify according to liquid behind claim 1 or 2 or the 3 or 5 described a kind of heavy arsenic is characterized in that containing arsenic concentration in the described mixed solution of step 3) is 500～800mg/l.
7. the method that adopts sulfate cinder to purify according to liquid behind claim 1 or 2 or the 3 or 5 described a kind of heavy arsenic is characterized in that, is added with massfraction in the described truck for vulcanlzing pan of step 3) and is 15～20% sodium sulfide solution.
8. the method that adopts sulfate cinder to purify according to liquid behind claim 1 or 2 or the 3 or 5 described a kind of heavy arsenic is characterized in that containing arsenic concentration in the liquid behind the described heavy arsenic of step 4) is 40～60mg/l.
9. the method that adopts sulfate cinder to purify according to liquid behind claim 1 or 2 or the 3 or 5 described a kind of heavy arsenic is characterized in that, liquid pump is gone into before the sulfate cinder behind the heavy arsenic of step 5), and described sulfate cinder is handled through immersion cylinder and scraper plate cooling.
10. adopt the method for sulfate cinder purification according to liquid behind claim 1 or 2 or the 3 or 5 described a kind of heavy arsenic, it is characterized in that, in the step 5), liquid behind the heavy arsenic carried out moisture mass fraction is 8～12% in the sulfate cinder after humidification, cooling and solid arsenic are handled, temperature is 50～70 ℃.
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| CN2012102018778A CN102719670B (en) | 2012-06-18 | 2012-06-18 | Method for purifying liquid after arsenic sedimentation by adopting sulfuric acid cinder |
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| CN2012102018778A CN102719670B (en) | 2012-06-18 | 2012-06-18 | Method for purifying liquid after arsenic sedimentation by adopting sulfuric acid cinder |
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| CN102719670B true CN102719670B (en) | 2013-07-31 |
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| CN102363842B (en) * | 2011-11-10 | 2013-04-17 | 山东国大黄金股份有限公司 | Process for recovering arsenic comprehensively by two-section roasting of arsenic-containing and carbon-containing gold concentrates |
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