CN106048247A - Method for recovering gold from roasting ash of gold ore - Google Patents
Method for recovering gold from roasting ash of gold ore Download PDFInfo
- Publication number
- CN106048247A CN106048247A CN201610664423.2A CN201610664423A CN106048247A CN 106048247 A CN106048247 A CN 106048247A CN 201610664423 A CN201610664423 A CN 201610664423A CN 106048247 A CN106048247 A CN 106048247A
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- Prior art keywords
- gold
- ore
- leaching
- roasting
- ore pulp
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/044—Recovery of noble metals from waste materials from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge
-
- 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
Abstract
The invention discloses a method for recovering gold from roasting ash of gold ore. The method comprises the following concrete steps: step 1, adding lime with mass percentage of 2 to 8% and underground water with mass percentage of 6 to 10% into ash collected from dust of a roasting furnace and carrying out granulation so as to obtain pellets; step 2, carrying out oxidizing roasting on the pellets obtained in the step 1 and then carrying out roasting so as to obtain a roasted product; step 3, subjecting the roasted product obtained in the step 2 to ore grinding so as to obtain primary ore pulp; step 4, transferring the primary ore pulp obtained in the step 3 to a cyanidation agitating tank for cyanidation leaching so as to obtain cyanidation-leached ore pulp; step 5, subjecting the cyanidation-leached ore pulp obtained in the step 4 to carbon leaching, and carrying out screening and carbon extraction after carbon leaching so as to obtain gold-loaded carbon and secondary ore pulp; and step 6, filtering the secondary ore pulp obtained in the step 5 and adding underground water into mine tailings obtained after filtering for washing three times so as to obtain lean liquid and leaching residues. The method overcomes the problem that ash produced in gold extraction technology for gold ore is hard to extract and refine in the prior art.
Description
Technical field
The invention belongs to non-ferrous metal ore technical field, be specifically related to a kind of from Gold Ore roasting ashes reclaim gold
Method.
Background technology
For refractory gold ore extraction of gold process, using roasting pretreatment technology is an application maturation, improves gold and reclaims
The effective means of rate, is especially processing carbon containing, sulfur-type Gold Ore, and carbon in Ore and sulfur can be decomposed by roasting technique,
Reach to eliminate the effects of the act the purpose of Gold leaching process unfavorable factor.But, carry out roasting locate in advance using convulsion or blast roaster
During reason, having a certain amount of thin ore particle ashes at air vent floating and deposit with air-flow, this usual granularity of part ashes is little
In 0.074mm, gold grade is higher, and occupation rate is up to about 30%, if abandoning resource with air-flow is a kind of waste, but such as
Fruit directly carries out cyanidation gold-extracted, and owing to ash Powder Particle Size is relatively thin, and the non-roasting of part is complete, and carbon or sulfur content are the highest, to cyanogen
Change impact relatively big, do not reach the purpose fully recycling gold.
Summary of the invention
It is an object of the invention to provide a kind of method reclaiming gold from Gold Ore roasting ashes, solve in prior art
The problem that in the Gold Ore extraction of gold process existed, in ashes, gold is difficult to be refined.
The technical solution adopted in the present invention is, a kind of reclaim from Gold Ore roasting ashes gold method, specifically according to
Following steps are implemented:
Step 1, to add mass fraction in the ashes of roaster flue dust collecting be the Calx of 2%～8%, and mass fraction is
The subsoil water of 6%～10% is pelletized, and obtains pelletizing；
Step 2, the pelletizing obtaining step 1 carry out oxidizing roasting, obtain calcining after roasting；
Step 3, the calcining obtaining step 2 carry out ore grinding, obtain an ore pulp；
Step 4, ore pulp step 3 obtained move to cyaniding agitator tank, carry out Cyanide Leaching, obtain Cyanide Leaching ore deposit
Slurry；
Step 5, the Cyanide Leaching ore pulp obtaining step 4 carry out charcoal leaching, carry out screening and carry charcoal, must carry gold respectively after charcoal leaching
Charcoal and secondary ore pulp；
Step 6, the secondary ore pulp obtaining step 5 filter, and filtration mine tailing is separately added into subsoil water and carries out three water
Wash, obtain lean solution and leaching slag.
The feature of the present invention also resides in,
The pellet size obtained in step 1 is 6mm～12mm.
Controlling sintering temperature when pelletizing carries out in step 2 oxidizing roasting is 500 DEG C～750 DEG C, roasting time be 1h～
4h。
Carrying out calcining in step 3 adding kerosene 200g/t～500g/t during ore grinding, groundwater quality mark is 50%, mill
Ore deposit fineness is-0.038mm.
Carrying out ore pulp in step 4 adjusting pulp density during Cyanide Leaching is 40%～45%, adds Calx adjustment pH value and is
9.5～11, add Cyanogran. 1kg/t～4kg/t, mixing time controls as 2h～12h.
Cyanide Leaching ore pulp carries out in step 5 adding during charcoal leaching 10g/L～30g/L coconut husk charcoal, and charcoal leaching time control is
12h～22h.
The coconut husk carbon granule degree added in step 5 is 0.3mm～2mm.
In step 6, subsoil water addition is identical in quality with mine tailing.
The invention has the beneficial effects as follows that a kind of method reclaiming gold from Gold Ore roasting ashes obtains gold leaching rate
More than 80%, Gold leaching effect is notable, and the Appropriate application for gold mine roasting ashes provides a suitable technological approaches.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in detail.
A kind of method reclaiming gold from Gold Ore roasting ashes of the present invention, specifically implements according to following steps:
Step 1, to add mass fraction in the ashes of roaster flue dust collecting be the Calx of 2%～8%, and mass fraction is
The subsoil water of 6%～10% is pelletized, and obtains pelletizing, and pellet size is 6mm～12mm；
Step 2, the pelletizing obtaining step 1 carry out oxidizing roasting, and controlling sintering temperature is 500 DEG C～750 DEG C, during roasting
Between be 1h～4h, after roasting calcining；
Step 3, the calcining obtaining step 2 add kerosene 200g/t～500g/t, and groundwater quality mark is 50% to enter
Row ore grinding, mog is-0.038mm, obtains an ore pulp；
Step 4, ore pulp step 3 obtained move to cyaniding agitator tank, and adjusting pulp density is 40%～45%, adds
It is 9.5～11 that Calx adjusts pH value, adds Cyanogran. 1kg/t～4kg/t, carries out Cyanide Leaching, mixing time control as 2h～
12h, obtains Cyanide Leaching ore pulp；
Step 5, the Cyanide Leaching ore pulp obtaining step 4 add 10g/L～30g/L coconut husk charcoal and carry out charcoal leaching, coconut husk charcoal
Granularity is 0.3mm～2mm, and the charcoal leaching time controls to be 12h～22h, carries out screening and carry charcoal after charcoal leaching, obtains gold loaded carbon and secondary respectively
Ore pulp；
Step 6, the secondary ore pulp obtaining step 5 filter, and filtration mine tailing is separately added into subsoil water and carries out three water
Washing, subsoil water addition is identical in quality with mine tailing, obtains lean solution and leaching slag.
A kind of method reclaiming gold from Gold Ore roasting ashes of the present invention, technical maturity, it is easy to accomplish, to environment without dirt
Dye；Employed in the present invention, roasting pretreatment is identical with whole ore roasting, and granulation bead can directly return and raw ore together roasting, joint
About capital expenditure；Use the separation method of the present invention, available gold leaching rate more than 80%, directly leach with conventional ashes
Comparing, in the case of gold grade is suitable, gold leaching rate increases substantially, and in leaching slag, sulfur fixed rate reaches more than 65%, alleviates
Pollution to environment, the present invention be especially suitable for from carbon containing, sulfur-bearing Gold Ore roasting ashes reclaim gold.
Embodiment 1
To reclaiming gold from the ashes containing gold 20g/t (wt), silver 5g/t (wt), TC2.18% (wt), S1.91% (wt):
Step 1, in the ashes of roaster flue dust collecting add mass fraction be the Calx of 8%, mass fraction is 10%
Subsoil water pelletize, obtain pelletizing, pellet size is 6mm；
Step 2, the pelletizing obtaining step 1 carry out oxidizing roasting, and controlling sintering temperature is 500 DEG C, and roasting time is 3h,
Calcining is obtained after roasting；
Step 3, the calcining obtaining step 2 add kerosene 200g/t, and groundwater quality mark is 50% to carry out ore grinding, mill
Ore deposit fineness is-0.038mm, obtains an ore pulp；
Step 4, ore pulp step 3 obtained move to cyaniding agitator tank, and adjusting pulp density is 40%, add Calx and adjust
Whole pH value is 9.5, adds Cyanogran. 2kg/t, carries out Cyanide Leaching, and mixing time controls to be 2h, obtains Cyanide Leaching ore pulp；
Step 5, the Cyanide Leaching ore pulp obtaining step 4 add 30g/L coconut husk charcoal and carry out charcoal leaching, and coconut husk carbon granule degree is
0.3mm, charcoal leaching time control is 22h, carries out screening and carry charcoal after charcoal leaching, obtains gold loaded carbon and secondary ore pulp respectively；
Step 6, the secondary ore pulp obtaining step 5 filter, and filtration mine tailing is separately added into subsoil water and carries out three water
Washing, subsoil water addition is identical in quality with mine tailing, obtains lean solution and leaching slag；
The gold leaching rate that the present embodiment obtains is 86.23%, compared with conventional cyanidation, in the case of gold grade is suitable,
Gold leaching rate improves 25.20%, and leaching effect is notable, sulfur fixed rate 65% in leaching slag, reduces the pollution to environment.
Embodiment 2
Reclaim from the ashes containing gold 9g/t (wt), silver 2.20g/t (wt), TC1.18% (wt), S2.01% (wt)
Gold:
Step 1, in the ashes of roaster flue dust collecting add mass fraction be the Calx of 4%, mass fraction is 8%
Subsoil water is pelletized, and obtains pelletizing, and pellet size is 12mm；
Step 2, the pelletizing obtaining step 1 carry out oxidizing roasting, and controlling sintering temperature is 500 DEG C, and roasting time is 4h,
Calcining is obtained after roasting；
Step 3, the calcining obtaining step 2 add kerosene 300g/t, and groundwater quality mark is 50% to carry out ore grinding, mill
Ore deposit fineness is-0.038mm, obtains an ore pulp；
Step 4, ore pulp step 3 obtained move to cyaniding agitator tank, and adjusting pulp density is 43%, add Calx and adjust
Whole pH value is 10, adds Cyanogran. 1kg/t, carries out Cyanide Leaching, and mixing time controls to be 8h, obtains Cyanide Leaching ore pulp；
Step 5, the Cyanide Leaching ore pulp obtaining step 4 add 15g/L coconut husk charcoal and carry out charcoal leaching, and coconut husk carbon granule degree is
0.3mm, charcoal leaching time control is 16h, carries out screening and carry charcoal after charcoal leaching, obtains gold loaded carbon and secondary ore pulp respectively；
Step 6, the secondary ore pulp obtaining step 5 filter, and filtration mine tailing is separately added into subsoil water and carries out three water
Washing, subsoil water addition is identical in quality with mine tailing, obtains lean solution and leaching slag；
The gold leaching rate that the present embodiment obtains is 83.70%, compared with conventional cyanidation, in the case of gold grade is suitable,
Gold leaching rate improves 15.30%, and leaching effect is notable；Sulfur fixed rate 80% in leaching slag, reduces the pollution to environment.
Embodiment 3
Return from the ashes containing gold 15.30g/t (wt), silver 4.12g/t (wt), TC1.00% (wt), S0.91% (wt)
Receive golden:
Step 1, in the ashes of roaster flue dust collecting add mass fraction be the Calx of 3%, mass fraction is 8%
Subsoil water is pelletized, and obtains pelletizing, and pellet size is 8mm；
Step 2, the pelletizing obtaining step 1 carry out oxidizing roasting, and controlling sintering temperature is 650 DEG C, and roasting time is 2h,
Calcining is obtained after roasting；
Step 3, the calcining obtaining step 2 add kerosene 200g/t, and groundwater quality mark is 50% to carry out ore grinding, mill
Ore deposit fineness is-0.038mm, obtains an ore pulp；
Step 4, ore pulp step 3 obtained move to cyaniding agitator tank, and adjusting pulp density is 40%, add Calx and adjust
Whole pH value is 10.5, adds Cyanogran. 3kg/t, carries out Cyanide Leaching, and mixing time controls to be 6h, obtains Cyanide Leaching ore pulp；
Step 5, the Cyanide Leaching ore pulp obtaining step 4 add 20g/L coconut husk charcoal and carry out charcoal leaching, and coconut husk carbon granule degree is
1mm, charcoal leaching time control is 18h, carries out screening and carry charcoal after charcoal leaching, obtains gold loaded carbon and secondary ore pulp respectively；
Step 6, the secondary ore pulp obtaining step 5 filter, and filtration mine tailing is separately added into subsoil water and carries out three water
Washing, subsoil water addition is identical in quality with mine tailing, obtains lean solution and leaching slag；
The gold leaching rate that the present embodiment obtains is 81.81%, compared with conventional cyanidation, in the case of gold grade is suitable,
Gold leaching rate improves 19.80%, and leaching effect is notable；Sulfur fixed rate 77% in leaching slag, reduces the pollution to environment.
Embodiment 4
Reclaim from the ashes containing gold 12g/t (wt), silver 4.00g/t (wt), TC3.80% (wt), S0.98% (wt)
Gold:
Step 1, in the ashes of roaster flue dust collecting add mass fraction be the Calx of 2%, mass fraction is 6%
Subsoil water is pelletized, and obtains pelletizing, and pellet size is 10mm；
Step 2, the pelletizing obtaining step 1 carry out oxidizing roasting, and controlling sintering temperature is 750 DEG C, and roasting time is 1h,
Calcining is obtained after roasting；
Step 3, the calcining obtaining step 2 add kerosene 500g/t, and groundwater quality mark is 50% to carry out ore grinding, mill
Ore deposit fineness is-0.038mm, obtains an ore pulp；
Step 4, ore pulp step 3 obtained move to cyaniding agitator tank, and adjusting pulp density is 45%, add Calx and adjust
Whole pH value is 11, adds Cyanogran. 4kg/t, carries out Cyanide Leaching, and mixing time controls to be 12h, obtains Cyanide Leaching ore pulp；
Step 5, the Cyanide Leaching ore pulp obtaining step 4 add 10g/L coconut husk charcoal and carry out charcoal leaching, and coconut husk carbon granule degree is
1.5mm, charcoal leaching time control is 12h, carries out screening and carry charcoal after charcoal leaching, obtains gold loaded carbon and secondary ore pulp respectively；
Step 6, the secondary ore pulp obtaining step 5 filter, and filtration mine tailing is separately added into subsoil water and carries out three water
Washing, subsoil water addition is identical in quality with mine tailing, obtains lean solution and leaching slag；
The gold leaching rate that the present embodiment obtains is 85.30%, compared with conventional cyanidation, in the case of gold grade is suitable,
Gold leaching rate improves 20.00%, and leaching effect is notable；Sulfur fixed rate 75% in leaching slag, reduces the pollution to environment.
The above, be only presently preferred embodiments of the present invention, not impose any restrictions the present invention, every according to the present invention
Any simple modification, change and the equivalent structure change that above example is made by technical spirit, all still falls within skill of the present invention
In the protection domain of art scheme.
Claims (8)
1. the method reclaiming gold from Gold Ore roasting ashes, it is characterised in that specifically implement according to following steps:
Step 1, to add mass fraction in the ashes of roaster flue dust collecting be the Calx of 2%～8%, and mass fraction is 6%
～the subsoil water of 10% pelletizes, obtain pelletizing；
Step 2, the pelletizing obtaining described step 1 carry out oxidizing roasting, obtain calcining after roasting；
Step 3, the calcining obtaining described step 2 carry out ore grinding, obtain an ore pulp；
Step 4, the ore pulp described step 3 obtained move to cyaniding agitator tank, carry out Cyanide Leaching, obtain Cyanide Leaching ore deposit
Slurry；
Step 5, the Cyanide Leaching ore pulp obtaining described step 4 carry out charcoal leaching, carry out screening and carry charcoal, must carry gold respectively after charcoal leaching
Charcoal and secondary ore pulp；
Step 6, the secondary ore pulp obtaining described step 5 filter, and filtration mine tailing is separately added into subsoil water and carries out three water
Wash, obtain lean solution and leaching slag.
A kind of method reclaiming gold from Gold Ore roasting ashes the most according to claim 1, it is characterised in that described step
The pellet size obtained in rapid 1 is 6mm～12mm.
A kind of method reclaiming gold from Gold Ore roasting ashes the most according to claim 1, it is characterised in that described step
Carrying out pelletizing in rapid 2 controlling sintering temperature during oxidizing roasting is 500 DEG C～750 DEG C, and roasting time is 1h～4h.
A kind of method reclaiming gold from Gold Ore roasting ashes the most according to claim 1, it is characterised in that described step
Adding kerosene 200g/t～500g/t when calcining carries out in rapid 3 ore grinding, groundwater quality mark is 50%, mog is-
0.038mm。
A kind of method reclaiming gold from Gold Ore roasting ashes the most according to claim 1, it is characterised in that described step
Carrying out ore pulp in rapid 4 adjusting pulp density during Cyanide Leaching is 40%～45%, and add Calx adjusting pH value is 9.5～11, adds
Entering Cyanogran. 1kg/t～4kg/t, mixing time controls as 2h～12h.
A kind of method reclaiming gold from Gold Ore roasting ashes the most according to claim 1, it is characterised in that described step
Cyanide Leaching ore pulp carries out in rapid 5 adding during charcoal leaching 10g/L～30g/L coconut husk charcoal, and the charcoal leaching time controls as 12h～22h.
A kind of method reclaiming gold from Gold Ore roasting ashes the most according to claim 6, it is characterised in that described step
The coconut husk carbon granule degree added in rapid 5 is 0.3mm～2mm.
A kind of method reclaiming gold from Gold Ore roasting ashes the most according to claim 1, it is characterised in that described step
In rapid 6, subsoil water addition is identical in quality with mine tailing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610664423.2A CN106048247A (en) | 2016-08-12 | 2016-08-12 | Method for recovering gold from roasting ash of gold ore |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108239702A (en) * | 2016-12-23 | 2018-07-03 | 北京有色金属研究总院 | A kind of soaking technology again of carbonaceous golden ore concentrate hard to treat cyanidation tailings |
| CN108796239A (en) * | 2018-05-28 | 2018-11-13 | 烟台市金奥环保科技有限公司 | A method of gold and silver in recycling high-carbon Gold Concentrate under Normal Pressure |
| CN110184451A (en) * | 2019-05-28 | 2019-08-30 | 西北矿冶研究院 | Mineral processing technology of micro-fine particle alteration granite oxidized gold ore |
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| CN103993181A (en) * | 2013-02-19 | 2014-08-20 | 湘潭中鑫矿业有限公司 | Processing method for comprehensively recovering rare/noble metals from metallurgy sintered flue dust |
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| CN104120270A (en) * | 2014-07-29 | 2014-10-29 | 湖南辰州矿业股份有限公司 | One-step technique for separating antimony from gold and lead in gold-containing antimony oxide smoke dust |
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| CN1840717A (en) * | 2005-03-30 | 2006-10-04 | 张至德 | Process for producing gold by conglomeration, oxidizing roasting, and sodium cyanide leaching of primary gold ore |
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| CN108239702A (en) * | 2016-12-23 | 2018-07-03 | 北京有色金属研究总院 | A kind of soaking technology again of carbonaceous golden ore concentrate hard to treat cyanidation tailings |
| CN108796239A (en) * | 2018-05-28 | 2018-11-13 | 烟台市金奥环保科技有限公司 | A method of gold and silver in recycling high-carbon Gold Concentrate under Normal Pressure |
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| CN110184451A (en) * | 2019-05-28 | 2019-08-30 | 西北矿冶研究院 | Mineral processing technology of micro-fine particle alteration granite oxidized gold ore |
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Application publication date: 20161026 |