CN103740926A - Technology for extracting gold from superfine carbonaceous gold ore containing arsenic sulfide - Google Patents
Technology for extracting gold from superfine carbonaceous gold ore containing arsenic sulfide Download PDFInfo
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Abstract
The invention discloses a technology for extracting gold from a superfine carbonaceous gold ore containing arsenic sulfide. The gold extracting method is provided in a way of combining a complex technology. The technology is characterized in that gold losses caused by difficult dressing are avoided through the direct treatment of a primary ore; the primary ore is pretreated by an oxygen pressure technology, the sulfide is oxidized to release gold particles, and convenient carbonitriding leaching is realized; in the process of oxygen pressure oxidation pretreatment, reaction is carried out in a liquid phase, no sulfur dioxide or arsenic oxide escapes, and arsenic elements are trapped in leaching residues, so that environment problems are solved; meanwhile, the gold robbing activity of carbonaceous substances is partially or completely passivated; during carbonitriding gold leaching, the problems that difficult solid-liquid separation is caused by high clay and the like are avoided through the adoption of a CIL (Carbon-in-Leach) technology so as to increase the recovery rate of the gold and overcome environment pollution caused by emission in the gold extracting process.
Description
Technical field
The invention belongs to hydrometallurgy field, relate to and a kind ofly from microfine carbon containing, arsenic, high clay sulfuration gold mine, extract golden technique.
Background technology
Gold is one of important precious metal, is the metal that the mankind find the earliest and use.Due to special physics and chemistry character, gold is used as valuable jewellery and finance deposit for a long time.In modern history, along with the development of modern science and technology, gold is also widely used in fields such as electronics, computer, precision instrument, Aeronautics and Astronautics.
Along with the exhaustion that oxidation gold mine is easily soaked on earth's surface, the raw gold ore of finding mostly in recent decades is complicated refractory sulfide.This class gold ore resource of China is more, and more complicated, as comprised in western China, the microfine carbonaceous of economizing (autonomous region) discovery in Yunnan, Guizhou, Guangxi, Sichuan, Hunan, Shaanxi, Gansu etc. is containing arsenic sulphide ores, there is the characteristic of difficult choosing, difficult smelting, and the environmental problem easily producing in existing smelting technology process.This class gold mine is from the end of the seventies in last century since the west and south, Guizhou Province is found first, and along with going deep into of studying and reconnoitre, a collection of large-scale, the super-huge card Carlin-type Gold Deposits such as Zhenfeng, Guizhou Lannigou, Shuiyindong are found in succession.Up to the present, China's microfine carbonaceous that only Yunnan, Guizhou Province, boundary, osmanthus " Golden Triangle " are found is containing pozzuolite ore resources, and the reserves accumulative total of gold has exceeded 600 tons, and the reserves that national accumulative total is verified exceed 1000 tons.At present, most mines are in there being resource unaccomplished " slow-witted ore deposit " state.
Microfine carbonaceous, containing pozzuolite gold mine, belongs to " multiple difficult " sulfuration gold mine, in this class gold mine, and gold and sulfide (arsenopyrite or mispickel, pyrite etc.) association, and by physically encapsulation; Carbonaceous matter has absorption and dissolves gold activity or " robbing gold " character, directly cyaniding leaching, golden leaching yield very low (≤5.0%).China Patent Publication No. CN1986071A disclose a kind of from sulfuration gold mine cyanidation gold-extracted tailings the floatation process of enriching Cu, gold and silver etc., after raw material is processed, directly carry out flotation.But because microfine carbonaceous is thin containing the particle of pozzuolite gold mine mineral resources medium clay soil high (25%), sulfide, while directly utilizing flotation technology to carry out enrichment, cause floating and enriching sulfide difficulty, the average recovery rate of gold is less than 80.0%.China Patent Publication No. CN102758080A, discloses a kind of method of sulfur-bearing gold mineral being carried out to microwave calcining and non-cyanide leaching gold.But because investment is large, the problem such as easily contaminate environment, byproduct (sulfuric acid and arsenic oxide arsenoxide) market be limited, the application of roasting preoxidation sulphide ores (or concentrate) technology is very limited; Have bargh to adopt this class sulfuration gold mine (or concentrate) of chemical oxidation, biological pre-oxidation to produce, but the problem of arsenic fails effectively to solve, can form potential environmental pollution, and the former production cost is higher, hard to carry at present; The existence of high clay, not only causes floating and enriching sulphide ores (or the gold) rate of recovery low, and makes the solid-liquid separation of cyanide gold-leaching ore pulp very difficult and be partly dissolved gold and be lost in and soak in slag, causes and soaks golden rich solution and soak the problems such as slag separation difficulty.
In sum, the existence of above problem, it is a kind of effective, pollution-free or pollute the method little, cost is low and come to extract gold from microfine carbon containing, arsenic, high clay sulfuration gold mine to need badly.
Summary of the invention
Task of the present invention is the feature containing pozzuolite gold mine for microfine carbonaceous, for microfine carbon containing, arsenic, high clay sulfuration gold mine, putting forward the difficulty choosing causing in golden process, difficult smelting and environmental problem, adopt effective complex art to combine to propose a kind of economy, efficient, from microfine carbonaceous, containing pozzuolite gold mine, put forward golden technique to environmental protection, the prior art that settles one by one difficult point, proposes to improve the golden rate of recovery and to overcome the environmental pollution that in golden process, discharge causes.
Task of the present invention completes by the following technical programs: the primary sulfuration gold mine of (1) autoclave or the direct preoxidation of oxygen pressure technology, cause being lost in mine tailing of gold when avoiding floating and enriching sulphide ores; (2) (pyrite, arsenopyrite or mispickel etc., be easy to cyanide gold-leaching to discharge gold grain to oxygen pressure preoxidation sulfide mineral; (3) when oxygen is pressed preoxidation sulfide mineral, the element arsenic in arsenopyrite is changed into ferric arsenate (claiming again scorodite), to confine arsenic, convert vitriol to soaking in slag and by sulfide, avoid the effusion of sulfurous gas and arsenic oxide arsenoxide to cause environmental problem; (4) oxygen is pressed in preoxidation process, the ADSORPTION OF GOLD activity of passivating carbonaceous thing to a certain extent; (5), while soaking gold at cyanidation technique in the ore pulp from Oxidation under pressurized oxygen, adopt CIL technology and avoid solid-liquid separation operation and improve the golden rate of recovery.Concrete steps are as follows:
(1) microfine carbonaceous sulfuration raw gold ore is carried out to the rear slurrying of fragmentation;
(2) ore pulp is added to autoclave, in autoclave, carry out Oxidation under pressurized oxygen;
(3) ore pulp after Oxidation under pressurized oxygen being added to gac carries out CIL and soaks gold;
(4) after soaking gold and finishing, the gac of gold-supported is separation with ore pulp.
The chemical composition of microfine carbonaceous sulfuration raw gold ore of the present invention is gram of/ton of ore deposit, gold >=2.5, iron arsenic ratio >=4.0 o'clock, and effect is better.
, under this condition, can there is autothermal oxidation reaction in preferred elements sulphur content >=6.0% in described microfine carbonaceous sulfuration raw gold ore, otherwise, need indirect heating.
Of the present invention microfine carbonaceous sulfuration raw gold ore is carried out to slurrying after fragmentation, preferably gold mine is crushed to≤-200 orders 100% or more than, solid-to-liquid ratio when preferred slurrying or Oxidation under pressurized oxygen is 1:2.0-4.0.
The described Oxidation under pressurized oxygen that carries out in autoclave, preferably Oxidation under pressurized oxygen sulfide is more than 85%.
Described CIL soaks gold, in order to obtain, better to soak golden effect and avoids the ore pulp after Oxidation under pressurized oxygen to carry out solid-liquid separation.
The 1.0-6.0% of the described preferred gold mine raw materials quality of gac addition.
Described is separation with ore pulp by the gac of gold-supported, and gac adopts conventional art desorb, reclaims gold and regenerated carbon, and preferably solid slag send Tailings Dam after Oxidative demage sodium cyanide.
Innovation of the present invention is:
If containing directly cyanide gold-leaching of this class ore deposit of pozzuolite gold mine, the leaching yield of gold is less than 5% to microfine carbonaceous, if first through the pre-treatment such as floating and enriching, roasting or bio-oxidation, cyaniding leaching, the total yield of gold is less than 60%.And adopt technique of the present invention, do not adopt flotation, but directly carry out autoclave Oxidation under pressurized oxygen, again in conjunction with subsequent step-CIL technology for gold extraction, the rate of recovery >=90% of gold, the total recovery of gold significantly improves, and the environmental pollution that sulfurous gas and arsenic may cause is well controlled.
Compared with prior art, the invention has the advantages that:
(1) direct processing primary ore deposit, avoids floating and enriching sulphide ores or gold, has shortened flow process, has reduced facility investment (as produced sulfuric acid, recovery and purification arsenic oxide arsenoxide etc.) and process cost.Meanwhile, by can the disposable recovery of gold lixiviation return from the mine tailing forming due to flotation, improved the golden rate of recovery;
(2) oxygen pressure or autoclave preoxidation process carry out in solution, do not have sulfurous gas and arsenic oxide arsenoxide to overflow, and have avoided the pollution to environment;
(3) oxygen is pressed or when autoclave preoxidation sulfide mineral, arsenic is changed into stable arsenate and confined soaking in slag, " robbing gold " activity of part or all of passivating carbonaceous thing;
(4) application of CIL technology for gold extraction, the lock out operation of not only having avoided soaking golden rich solution Yu having soaked slag because competition and the leaching GOLD FROM PLATING SOLUTION content of absorption are extremely low, has improved the golden rate of recovery simultaneously.
The present invention is directed to China's microfine carbonaceous containing pozzuolite gold mine " multiple difficult " feature, utilize complex art directly to process raw ore, sulfide oxidation, confinement arsenic, passivation carbon, in golden process, adopt CIL technology soak golden rich solution and soak slag lock out operation avoiding soaking, form a kind of brief, efficient, clean golden flow process of putting forward, on China's gold industry, have broad application prospects.
Embodiment
With embodiment, the invention will be further described below, but the present invention is not limited to these embodiment.
Embodiment 1:
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 3.0 grams/ton of gold, sulphur 6.20%, arsenic 0.5%, carbon 1.40%.First sample ore is crushed to-200 orders 100%, then carries out respectively direct cyanide gold-leaching and carry gold by the inventive method.
The direct cyanide gold-leaching of primary sulfide ore: water pulp, add milk of lime and regulate potential of hydrogen be stabilized in pH value～11.0, add sodium cyanide and leach, sodium cyanide starting point concentration is 4.0 grams per liters, and leaching solid-to-liquid ratio is 1:3.Adopt roller bottle technology leaching 24 hours, the leaching yield of gold is only 1.40%.Leaching test-results explanation, this sample ore is difficult soaking very, and major cause is that the physically encapsulation of sulfide to gold grain and " robbing gold " character of Carbonaceous matter cause.
Utilize the inventive method to carry gold: to get 200 grams, sample ore, 600 milliliters, water, add in 1 liter of autoclave; Stir, 500 revs/min, be warming up to 220 ℃, then oxygen makes point to be depressed into 1.0MPa and just starts oxidation test, oxidization time is 3 hours.After measured, sulfide oxidation ratio is～98.0%, arsenic plug with molten metal rate > 95.0%.
The impact of leaching in pulp (CIL) gac add-on: filter the ore pulp after Oxidation under pressurized oxygen, filter cake adds water slurrying, adds milk of lime acid adjustment basicity and is stabilized in pH value～11.0, and solid-to-liquid ratio is 1:3.0; Add again sodium cyanide (concentration is 4.0 grams per liters), gac 1.0%.By roller bottle technology, in conjunction with CIL technology for gold extraction, at room temperature soak gold test 24 hours, the leaching yield of gold is 91.2%.
Embodiment 2:
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 3.0 grams/ton of gold, sulphur 6.20%, arsenic 0.5%, carbon 1.40%.First sample ore is crushed to-200 orders 100%, then carries out respectively direct cyanide gold-leaching and carry gold by the inventive method.
The direct cyanide gold-leaching of primary sulfide ore: water pulp, add milk of lime and regulate potential of hydrogen be stabilized in pH value～11.0, add sodium cyanide and leach, sodium cyanide starting point concentration is 4.0 grams per liters, and leaching solid-to-liquid ratio is 1:3.Adopt roller bottle technology leaching 24 hours, the leaching yield of gold is only 1.40%.Leaching test-results explanation, this sample ore is difficult soaking very, and major cause is that the parcel of sulfide to gold grain and " robbing gold " character of Carbonaceous matter cause.
Utilize the inventive method to carry gold: to get 200 grams, sample ore, 600 milliliters, water, add in 1 liter of autoclave; Stir, 500 revs/min, be warming up to 220 ℃, then oxygen makes point to be depressed into 1.0MPa and just starts oxidation test, oxidization time is 3 hours.After measured, sulfide oxidation ratio is～98.0%, arsenic plug with molten metal rate > 95.0%.
The impact of leaching in pulp (CIL) gac add-on: filter the ore pulp after Oxidation under pressurized oxygen, filter cake adds water slurrying, adds milk of lime acid adjustment basicity and is stabilized in pH value～11.0, and solid-to-liquid ratio is 1:3.0; Adding sodium cyanide concentration is 4.0 grams per liters again, gac 4.5%.By roller bottle technology, in conjunction with CIL technology for gold extraction, at room temperature soak gold test 24 hours, the leaching yield of gold is 92.5%.
Embodiment 3:
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 3.0 grams/ton of gold, sulphur 6.0%, arsenic 0.5%, carbon 1.40%.First sample ore is crushed to-200 orders 100%, then carries out respectively direct cyanide gold-leaching and carry gold by the inventive method.
The direct cyanide gold-leaching of primary sulfide ore: water pulp, add milk of lime and regulate potential of hydrogen be stabilized in pH value～11.0, add sodium cyanide and leach, sodium cyanide starting point concentration is 4.0 grams per liters, and leaching solid-to-liquid ratio is 1:3.0.Adopt roller bottle technology leaching 24 hours, the leaching yield of gold is only 1.40%.Leaching test-results explanation, this sample ore is difficult soaking very, and major cause is that the parcel of sulfide to gold grain and " robbing gold " character of Carbonaceous matter cause.
Utilize the inventive method to carry gold: to get 200 grams, sample ore, 600 milliliters, water, add in 1 liter of autoclave; Stir, 500 revs/min, be warming up to 220 ℃, then oxygen makes point to be depressed into 1.0MPa and just starts oxidation test, oxidization time is 3 hours.After measured, sulfide oxidation ratio is～98.0%, arsenic plug with molten metal rate > 95.0%.
The impact of leaching in pulp (CIL) gac add-on: filter the ore pulp after Oxidation under pressurized oxygen, filter cake adds water slurrying, adds milk of lime acid adjustment basicity and is stabilized in pH value～11.0, and solid-to-liquid ratio is 1:3.0; Adding sodium cyanide concentration is 4.0 grams per liters again, gac 6.0%.By roller bottle technology, in conjunction with CIL technology for gold extraction, at room temperature soak gold test 24 hours, the leaching yield of gold is 93.2%.
Embodiment 4:
The impact of pulp density on sulfide oxidation speed:
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 3.0 grams/ton of gold, sulphur 6.0%, arsenic 0.5%, carbon 1.40%.Sample ore is crushed to-200 orders 100%, then carries out Oxidation under pressurized oxygen test, to detect the impact of pulp density on sulfide oxidation speed.
Get 200 grams, sample ore, add 400 milliliters, water (being that solid-to-liquid ratio is 1:2.0), add in 1 liter of autoclave and carry out oxidation test.Test conditions is: stir 500 revs/min, be warming up to 220 ℃, then oxygen makes point to be depressed into 1.0MPa and just starts oxidation test.After measured, when ore pulp solid-to-liquid ratio is 1:2.0, sulfide oxidation ratio reaches in the situation of 98% left and right, and oxidization time needs 5 hours.
Embodiment 5:
The impact of pulp density on sulfide oxidation speed:
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 3.0 grams/ton of gold, sulphur 6.0%, arsenic 0.5%, carbon 1.40%.Sample ore is crushed to-200 orders 100%, then carries out Oxidation under pressurized oxygen test, to detect the impact of pulp density on sulfide oxidation speed.
Get 200 grams, sample ore, add 800 milliliters, water (being that solid-to-liquid ratio is 1:4.0), add in 1 liter of autoclave and carry out oxidation test.Test conditions is: stir 500 revs/min, be warming up to 220 ℃, then oxygen makes point to be depressed into 1.0MPa and just starts oxidation test.After measured, when ore pulp solid-to-liquid ratio is 1:4.0, oxidization time was at 3 hours, and sulfide oxidation ratio can reach more than 99.0%.
Embodiment 6:
The impact of sulfide oxidation ratio on gold leaching rate:
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 1.76 grams/ton of gold, sulphur 9.2%, arsenic 0.56%, carbon 1.84%.First sample ore is crushed to-200 orders 100%, then carries out respectively direct cyanide gold-leaching and carry gold by the inventive method.
The direct cyanide gold-leaching of raw ore: water pulp, add milk of lime and regulate acidity be stabilized in pH value～11.0, adding sodium cyanide, to leach starting point concentration be 4.0 grams per liters, and leaching solid-to-liquid ratio is 1:3.0.Adopt roller bottle technology leaching 24 hours, the leaching yield of gold is only 2.30%.Utilize the inventive method to carry gold and measure the impact of solid liquid phase comparison preoxidation: getting 1000 grams, sample ore, add 3000 milliliters, water, add in 5 liters of autoclaves.Preoxidation is carried out under the following conditions: stir 600 revs/min, be warming up between 220-230 ℃, then oxygen dividing and be depressed into 1.0MPa and just start oxidation test, is sampling in 2,2.5,3.0 and 3.5 hours between at the trial respectively.After measured, sulfide oxidation ratio is respectively 82.7%, 92.8%, 97.6% and 98.9%.
Filter respectively the above-mentioned ore pulp after Oxidation under pressurized oxygen, and filter cake added to water slurrying respectively, add milk of lime acid adjustment degree and be stabilized in pH value～11.0, solid-to-liquid ratio is 1:3.0, then to add sodium cyanide concentration be 4.0 grams per liters, gac 4.5%.By roller bottle technology, in conjunction with CIL technology for gold extraction, at room temperature soak respectively gold test 24 hours.Sulfide is under oxidation ratio 82.7% condition by analysis, and the leaching yield of gold is 56.2%; During oxidation ratio 92.8%, the leaching yield of gold is 86.0%; During oxidation ratio 97.6%, the leaching yield of gold is 90.3%; During oxidation ratio 98.9%, the leaching yield of gold reaches 92.9%.By the above results, shown, the oxidation ratio of sulfide has significant impact to cyanide gold-leaching.
Embodiment 7:
Measure the impact of solid liquid phase comparison preoxidation
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 1.76 grams/ton of gold, sulphur 9.2%, arsenic 0.56%, carbon 1.84%.First sample ore is crushed to-200 orders 100%, then carries out respectively direct cyanide gold-leaching and carry gold by the inventive method.
The direct cyanide gold-leaching of raw ore: water pulp, add milk of lime and regulate acidity be stabilized in pH value～11.0, adding sodium cyanide, to leach starting point concentration be 4.0 grams per liters, and leaching solid-to-liquid ratio is 1:3.0.Adopt roller bottle technology leaching 24 hours, the leaching yield of gold is only 2.30%.
Get 200 grams, sample ore, add 400 milliliters, water, add in 1 liter of autoclave.Preoxidation is carried out under the following conditions: stir 500 revs/min, be warming up to 220 ℃, then oxygen divides and be depressed into 1.0MPa and just start oxidation test, the time is 4 hours.After measured, sulfide oxidation ratio is～98.0%, arsenic plug with molten metal rate >98%.
The ore pulp of filtration after Oxidation under pressurized oxygen, filter cake adds water slurrying, adds milk of lime acid adjustment degree and is stabilized in pH value～11.0, and solid-to-liquid ratio is 1:3.0, then to add sodium cyanide concentration be 4.0 grams per liters, gac 4.5%.By roller bottle technology, in conjunction with CIL technology for gold extraction, at room temperature soak gold test 24 hours, the leaching yield of gold is 92.1%.
Embodiment 8:
Measure the impact of solid liquid phase comparison preoxidation
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 1.76 grams/ton of gold, sulphur 9.2%, arsenic 0.56%, carbon 1.84%.First sample ore is crushed to-200 orders 100%, then carries out respectively direct cyanide gold-leaching and carry gold by the inventive method.
The direct cyanide gold-leaching of raw ore: water pulp, add milk of lime and regulate acidity be stabilized in pH value～11.0, adding sodium cyanide, to leach starting point concentration be 4.0 grams per liters, and leaching solid-to-liquid ratio is 1:3.0.Adopt roller bottle technology leaching 24 hours, the leaching yield of gold is only 2.30%.
Get 200 grams, sample ore, add 600 milliliters, water, add in 1 liter of autoclave.Preoxidation is carried out under the following conditions: stir 500 revs/min, be warming up to 220 ℃, then oxygen divides and be depressed into 1.0MPa and just start oxidation test, the time is 4 hours.After measured, sulfide oxidation ratio is at >98.0%, arsenic plug with molten metal rate >98%.
The ore pulp of filtration after Oxidation under pressurized oxygen, filter cake adds water slurrying, adds milk of lime acid adjustment degree and is stabilized in pH value～11.0, and solid-to-liquid ratio is 1:3.0, then to add sodium cyanide concentration be 4.0 grams per liters, gac 4.5%.By roller bottle technology, in conjunction with CIL technology for gold extraction, at room temperature soak gold test 24 hours, the leaching yield of gold is 92.5%.
Embodiment 9:
Measure the impact of solid liquid phase comparison preoxidation
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 1.76 grams/ton of gold, sulphur 9.2%, arsenic 0.56%, carbon 1.84%.First sample ore is crushed to-200 orders 100%, then carries out respectively direct cyanide gold-leaching and carry gold by the inventive method.
The direct cyanide gold-leaching of raw ore: water pulp, add milk of lime and regulate acidity be stabilized in pH value～11.0, adding sodium cyanide, to leach starting point concentration be 4.0 grams per liters, and leaching solid-to-liquid ratio is 1:3.0.Adopt roller bottle technology leaching 24 hours, the leaching yield of gold is only 2.30%.
Get 200 grams, sample ore, add 800 milliliters, water, add in 1 liter of autoclave.Preoxidation is carried out under the following conditions: stir 500 revs/min, be warming up to 220 ℃, then oxygen divides and be depressed into 1.0MPa and just start oxidation test, the time is 3.5 hours.After measured, sulfide oxidation ratio is at >98.0%, arsenic plug with molten metal rate >98%.
The ore pulp of filtration after Oxidation under pressurized oxygen, filter cake adds water slurrying, adds milk of lime acid adjustment degree and is stabilized in pH value～11.0, and solid-to-liquid ratio is 1:3.0, then to add sodium cyanide concentration be 4.0 grams per liters, gac 4.5%.By roller bottle technology, in conjunction with CIL technology for gold extraction, at room temperature soak gold test 24 hours, the leaching yield of gold is 92.8%.
Embodiment 10:
The impact of mineral grain on Oxidation under pressurized oxygen speed:
The microfine carbonaceous that the present embodiment is used is containing in the primary sample ore of pozzuolite gold mine, containing 1.76 grams/ton of gold, sulphur 9.2%, arsenic 0.56%, carbon 1.84%.Sample ore is crushed to-320 orders 100, the impact with the size that detects mineral grain on preoxidation sulfide speed.
Get 200 grams, sample ore, add 600 milliliters, water, add in 1 liter of autoclave.Preoxidation is carried out under the following conditions: stir 500 revs/min, be warming up to 220 ℃, then oxygen divides and is depressed into 1.0MPa and just starts oxidation test.After measured, when test proceeds to 2 hours, the oxidation ratio of sulfide can reach 91.0%; When test proceeds to 2.5 hours, the oxidation ratio of sulfide can reach 98.0% left and right.Visible, reduction mineral grain can obviously be accelerated the oxidising process of sulfide.
Claims (8)
1. from microfine carbonaceous, containing pozzuolite gold mine, put forward a golden technique, it is characterized in that specifically comprising the following steps:
(1) microfine carbonaceous sulfuration raw gold ore is carried out to the rear slurrying of fragmentation;
(2) ore pulp is added to autoclave, in autoclave, carry out Oxidation under pressurized oxygen;
(3) ore pulp after Oxidation under pressurized oxygen being added to gac carries out CIL and soaks gold;
(4) after soaking gold and finishing, the gac of gold-supported is separation with ore pulp.
According to claim 1 a kind of from microfine carbonaceous containing putting forward golden technique pozzuolite gold mine, it is characterized in that: the chemical composition of the microfine carbonaceous sulfuration raw gold ore of telling is gram of/ton of ore deposit, gold >=2.5, iron arsenic ratio >=4.0.
According to claim 1 a kind of from microfine carbonaceous containing putting forward golden technique pozzuolite gold mine, it is characterized in that: element sulfur content >=6.0% in described raw gold ore.
4. according to a kind of described in any one in claim 1-3, from microfine carbonaceous, containing pozzuolite gold mine, put forward golden technique, it is characterized in that: described gold mine is crushed to-200 orders 100% or more than.
5. according to a kind of described in any one in claim 1-3, from microfine carbonaceous, containing pozzuolite gold mine, put forward golden technique, it is characterized in that: described slurrying solid-to-liquid ratio is 1:2.0-4.0.
6. according to a kind of described in any one in claim 1-3, from microfine carbonaceous, containing pozzuolite gold mine, put forward golden technique, it is characterized in that: the described Oxidation under pressurized oxygen that carries out in autoclave, Oxidation under pressurized oxygen sulfide is more than 85%.
7. according to a kind of described in any one in claim 1-3, from microfine carbonaceous, containing pozzuolite gold mine, put forward golden technique, it is characterized in that: described gac addition is the 1.0-6.0% of gold mine raw materials quality.
8. according to a kind of described in any one in claim 1-3, from microfine carbonaceous, containing pozzuolite gold mine, put forward golden technique, it is characterized in that: after separation with ore pulp the gac of gold-supported, solid slag send Tailings Dam after Oxidative demage sodium cyanide.
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| CN105648231A (en) * | 2016-01-19 | 2016-06-08 | 中国有色桂林矿产地质研究院有限公司 | Quick hot pressing oxidation pretreatment technology for microgranular sulfide type gold ore |
| CN106086455A (en) * | 2016-08-18 | 2016-11-09 | 紫金矿业集团股份有限公司 | A kind of Quick Oxidation method of carbonaceous Very Small Au-ore |
| CN106967887A (en) * | 2017-04-13 | 2017-07-21 | 中国有色桂林矿产地质研究院有限公司 | A kind of extraction of gold process from multiple difficult vulcanization gold mine |
| CN115449626A (en) * | 2022-09-14 | 2022-12-09 | 海南行者新材料科技有限公司 | Method for treating sulfur-containing gold ore powder by using microwaves |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105268543A (en) * | 2015-11-30 | 2016-01-27 | 长春黄金研究院 | Flotation recovery process for high-arsenic high-carbon micro-fine-particle disseminated complex gold ore |
| CN105648231A (en) * | 2016-01-19 | 2016-06-08 | 中国有色桂林矿产地质研究院有限公司 | Quick hot pressing oxidation pretreatment technology for microgranular sulfide type gold ore |
| CN105648231B (en) * | 2016-01-19 | 2017-12-08 | 中国有色桂林矿产地质研究院有限公司 | The quick hot-press oxidization pretreatment technique of microfine sulfide type of gold deposit |
| CN106086455A (en) * | 2016-08-18 | 2016-11-09 | 紫金矿业集团股份有限公司 | A kind of Quick Oxidation method of carbonaceous Very Small Au-ore |
| CN106967887A (en) * | 2017-04-13 | 2017-07-21 | 中国有色桂林矿产地质研究院有限公司 | A kind of extraction of gold process from multiple difficult vulcanization gold mine |
| CN115449626A (en) * | 2022-09-14 | 2022-12-09 | 海南行者新材料科技有限公司 | Method for treating sulfur-containing gold ore powder by using microwaves |
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