CN108728640A - A kind of recovery process of arsenic-containing sulphur-containing type Gold - Google Patents
A kind of recovery process of arsenic-containing sulphur-containing type Gold Download PDFInfo
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- CN108728640A CN108728640A CN201810599059.5A CN201810599059A CN108728640A CN 108728640 A CN108728640 A CN 108728640A CN 201810599059 A CN201810599059 A CN 201810599059A CN 108728640 A CN108728640 A CN 108728640A
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- arsenic
- gold
- ore pulp
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- recovery process
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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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/12—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
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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
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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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
- C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
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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
Abstract
A kind of recovery process of arsenic-containing sulphur-containing type Gold, includes the following steps：（1）By crushing raw ore to grain size granularity≤10mm；（2）Ore grinding, classification, control Grading Overflow product granularity -0.074mm account for 80%~95%, ore pulp mass concentration 25%~35%；（3）By Grading Overflow product thickening, underflow ore pulp and dense contracting overflow water are obtained；Control 35~45wt% of underflow ore pulp；（4）Joint alkali is added in underflow ore pulp and adjusts slurry pH more than 14, then 15 DEG C~50 DEG C Aerated stirrings for 24 hours~30h；（5）The golden agent of leaching is added into ore pulp, it is 1.5kg/t~3.5kg/t to soak golden agent additive amount, and for 24 hours~48h is leached under Aerated stirring；（6）Activated carbon is added into the ore pulp after leaching, obtains gold loaded carbon product and tailings；（7）Gold loaded carbon obtains gold product and Tuo Jin charcoals by conventional parsing, electrolysis and after smelting.
Description
Technical field
The invention belongs to field of hydrometallurgy, and in particular to a kind of recovery process of arsenic-containing sulphur-containing type Gold.
Background technology
Arsenic-containing sulphur-containing type gold mine major metal mineral are pyrite, mispickel and a small amount of magnetic iron ore and micro chalcopyrite, sudden strain of a muscle
Zinc ore.Gangue mineral mainly has quartz and feldspar, the followed by clay minerals such as kaolin, sericite.Due to ore properties
Particularity, floatation process recycling gold, the golden rate of recovery only has 46% or so, and conventional cyanidation leaches charcoal absorbing process, due to big portion
Parting causes the leaching rate of gold to only have 36%~42% by pyrite, mispickel and quartz package, using flotation+leaching process integration stream
Journey, golden overall recovery 65%~70%, usually because gold recovery is low, beneficiation cost and aurin powder smelting cost it is high due to so that ore is lost
Industrial economics.
To make arsenic-containing sulphur-containing type gold mine be effectively utilized, increases the resource reserve of enterprise, increase the economic effect of enterprise
Therefore benefit has invented the recovery process of arsenic-containing sulphur-containing type Gold.
Invention content
The purpose of the present invention is to provide a kind of recovery process of arsenic-containing sulphur-containing type Gold.
Based on above-mentioned purpose, the present invention adopts the following technical scheme that：
A kind of recovery process of arsenic-containing sulphur-containing type Gold, method and step are as follows：
The first step：Crushing raw ore, i.e. tcrude ore are crushed through two section of one closed circuit crushing technological process, be crushed to final size≤
10mm；
Second step：Ore grinding and classification, i.e., broken raw ore feed ball mill ore grinding, and ore grinding product feeds grader classification, control
Grading Overflow product granularity -0.074mm processed accounts for 80%~95%, ore pulp mass concentration 25%~35%；
Third walks：Concentration, i.e., Grading Overflow product feeds concentrator thickening, obtains underflow ore pulp and concentration overflow water；Control
Thickener underflow ore pulp mass concentration 35%~45% processed；
4th step：Underflow ore pulp is added joint alkali and carries out removal of impurities pretreatment, and detailed process is：Joint alkali is added, then at 15 DEG C
~50 DEG C of Aerated stirrings for 24 hours~30h, aeration speed 0.5-1.0L/min；The total dosage of joint alkali is 10kg/t~100kg/t, excellent
It is selected as 30 ~ 50kg/t, joint alkali is by sodium carbonate, sodium peroxide, sodium hydroxide and calcium oxide according to mass ratio（2~3）:（3~
4）︰（9~10）︰（6~9）It mixes；
5th step：The golden agent of leaching is added in Gold leaching that is, into pretreated ore pulp, and it can be Cymag and/or cyaniding to soak golden agent
Potassium or other golden agent of low toxicity leaching, additive amount is 1.5kg/t~3.5kg/t, leaches and is carried out under inflation, mechanical agitation,
Extraction time is for 24 hours~48h, inflation rate 0.5-1.0L/min；
6th step：Charcoal adsorbs, i.e., activated carbon is added into the ore pulp after leaching, activated carbon 12g/L~20g/L, adsorption time is for 24 hours
~36h obtains gold loaded carbon product and tailings；
7th step：Gold loaded carbon obtains gold product and Tuo Jin charcoals by conventional parsing, electrolysis and after smelting, and takes off gold charcoal and returns
It is continuing with to charcoal absorption；
8th step：Tailings obtains dry tailings and filtrate water after filtering means dehydration, and there are Tailings Dam, filtrate water and concentrations for dry tailings heap
Overflow water enters circulating water pool, and ore grinding and graded operation are transported to through water circulating pump.
The present invention is mainly by combining the miscellaneous pretreatment of alkali leaching, first, arsenic removal, the arsenic mineral in ore is made to be oxidized to arsenic acid
Salt, arsenic-removing rate enable arsenic package gold to expose 85%~90%；Second is that sulphur removal, making all kinds of sulfide oxidations in ore at sulphur
Hydrochlorate enables sulfide package gold to expose；Third, except silicon, keeping the Silicate Rocks class mineral portion formation calcium silicates in ore heavy
It forms sediment, silicates gangue ore package gold is enable to expose, by arsenic removal, sulphur removal and remove silicon, gold can not be soaked by, which making, becomes exposed
Gold makes the agent of leaching gold and gold mineral be in contact, and improves the leaching rate of gold.
The product that the present invention obtains is entirely gold, output aurin powder is avoided, due to containing impurity elements arsenic, arsenic in ore
The rich gold in Gold Concentrate under Normal Pressure, at golden ore concentrate hard to treat, arsenic-containing gold concentrate is reduced in current selling price lattice, and Business Economic Benefit is poor.
The present invention is suitable for the special refractory gold ore such as arsenic mineral coated, sulfide coated and silicate coated
The recycling of middle gold.
Description of the drawings
Fig. 1 is the process flow chart of the present invention.
Specific implementation mode
Technical scheme of the present invention is described further below in conjunction with specific embodiment, but protection scope of the present invention is simultaneously
It is not limited to this.Inflation refers to blowing air in the present embodiment.
Embodiment 1
A kind of recovery process of arsenic-containing sulphur-containing type Gold, arsenic-containing sulphur-containing disseminated gold deposit stone gold grade 3g/t, arsenic grade
0.25%, sulfur grade 0.5%, Iron grade 4.0%, zinc grade 0.3%, copper grade 0.2%, as shown in Figure 1, being as follows：
The first step：Crushing raw ore, i.e. tcrude ore are crushed through two section of one closed circuit crushing technological process, be crushed to final size≤
10mm；
Second step：Ore grinding and classification, i.e., broken raw ore feed ball mill ore grinding, and ore grinding product feeds grader classification, control
Grading Overflow product granularity -0.074mm processed accounts for 80%, ore pulp mass concentration 35%；
Third walks：Concentration, i.e., Grading Overflow product feeds concentrator thickening, obtains underflow ore pulp and concentration overflow water；Control
Thickener underflow ore pulp mass concentration 45% processed；
4th step：Underflow ore pulp is added joint alkali and carries out removal of impurities pretreatment, and detailed process is：30kg/t is added and combines alkali, at this time
Slurry pH is more than 14, then in 15 DEG C of Aerated stirring 30h, aeration speed 0.5L/min；Joint alkali is by sodium carbonate, peroxidating
Sodium, sodium hydroxide and calcium oxide are according to mass ratio 2:3 ︰, 9 ︰ 6 are mixed；
5th step：The golden agent of leaching is added in Gold leaching that is, into pretreated ore pulp, and it can be Cymag to soak golden agent, and additive amount is
2.3kg/t is leached and is carried out under inflation, mechanical agitation, and extraction time is for 24 hours；Aeration speed 0.5L/min；Gold leaching rate
86.50%；
6th step：Charcoal adsorbs, i.e., activated carbon, activated carbon 12g/L is added into the ore pulp after leaching, adsorption time 36h is carried
Golden charcoal product（Gold grade 3000g/t）And tailings；
7th step：Gold loaded carbon obtains gold product and Tuo Jin charcoals by conventional parsing, electrolysis and after smelting, and takes off gold charcoal and returns
It is continuing with to charcoal absorption；
8th step：Tailings obtains dry tailings and filtrate water after filtering means dehydration, and there are Tailings Dam, filtrate water and concentrations for dry tailings heap
Overflow water enters circulating water pool, and ore grinding and graded operation are transported to through water circulating pump.
Embodiment 2
A kind of recovery process of arsenic-containing sulphur-containing type Gold, arsenic-containing sulphur-containing disseminated gold deposit stone gold grade 4g/t, arsenic grade 1%,
Sulfur grade 3%, Iron grade 6.0%, zinc grade 0.1%, copper grade 0.1%, as shown in Figure 1, being as follows：
The first step：Crushing raw ore, i.e. tcrude ore are crushed through two section of one closed circuit crushing technological process, be crushed to final size≤
10mm；
Second step：Ore grinding and classification, i.e., broken raw ore feed ball mill ore grinding, and ore grinding product feeds grader classification, control
Grading Overflow product granularity -0.074mm processed accounts for 90%, ore pulp mass concentration 25%；
Third walks：Concentration, i.e., Grading Overflow product feeds concentrator thickening, obtains underflow ore pulp and concentration overflow water；Control
Thickener underflow ore pulp mass concentration 35% processed；
4th step：Concentration underflow ore pulp is added joint alkali and carries out removal of impurities pretreatment, and detailed process is：Joint alkali 50kg/t is added,
At this time slurry pH be more than 14, then 25 DEG C of Aerated stirrings for 24 hours, aeration speed 1.0L/min；Joint alkali is by sodium carbonate, peroxide
Change sodium, sodium hydroxide and calcium oxide according to mass ratio 3:4 ︰, 10 ︰ 9 are mixed；
5th step：The golden agent of leaching is added in Gold leaching that is, into pretreated ore pulp, and it is potassium cyanide, additive amount 3kg/ to soak golden agent
T is leached and is carried out under inflation, mechanical agitation, extraction time 48h, aeration speed 1.0L/min, gold leaching rate 90%；
6th step：Charcoal adsorbs, i.e., activated carbon, activated carbon 20g/L is added into the ore pulp after leaching, adsorption time for 24 hours, is carried
Golden charcoal product（Gold grade 4000g/t）And tailings；
7th step：Gold loaded carbon obtains gold product and Tuo Jin charcoals by conventional parsing, electrolysis and after smelting, and takes off gold charcoal and returns
It is continuing with to charcoal absorption；
8th step：Tailings obtains dry tailings and filtrate water after filtering means dehydration, and there are Tailings Dam, filtrate water and concentrations for dry tailings heap
Overflow water enters circulating water pool, and ore grinding and graded operation are transported to through water circulating pump.
Comparative example 1
With embodiment 2 the difference is that：4th step is pre-processed using sodium hydroxide, dosage 50kg/t, leaching agent
Cyaniding potassium application rate 3kg/t, gold leaching rate 41%.
The main reason for comparative example gold leaching rate is low is to be not added with the then ore pulp viscosity increasing of sodium carbonate, sodium peroxide and calcium oxide
Add, gold exposure is incomplete, and addition sodium carbonate can effectively improve the dispersion degree of leaching agent as ore pulp dispersant, add peroxidating
Sodium is remarkably improved the oxidation rate of arsenic mineral, sulfur mineral etc. as catalyst；Addition calcium oxide, can as contamination precipitation agent
So that arsenic, sulfur mineral impurity is formed corresponding calcium precipitation object, removes impurity element, make gold under the comprehensive function of these alkali preserved material
Exposure more thoroughly, to be conducive to the leaching of gold.
The easy argillization gold mine of low-sulfur containing arsenic recycles gold using the present invention from ore, and 85% or more gold leaching rate is floating compared to single
Technique gold recovery is selected to improve 41.50%, conventional extract technology gold recovery improves 46.50%, with flotation-leaching process integration phase
Than simplifying technological process.
Claims (8)
1. a kind of recovery process of arsenic-containing sulphur-containing type Gold, characterized in that include the following steps：
（1）By crushing raw ore to granularity≤10mm；
（2）Broken raw ore ore grinding, the classification of ore grinding product, control Grading Overflow product granularity -0.074mm account for 80%~95%,
Ore pulp mass concentration 25%~35%；
（3）Grading Overflow product is subjected to thickening, obtains underflow ore pulp and concentration overflow water；It is dense to control underflow ore pulp quality
Degree 35%~45%；
（4）By underflow ore pulp be added joint alkali, then 15 DEG C~50 DEG C Aerated stirrings for 24 hours~30h；
（5）The golden agent of leaching is added into pretreated ore pulp, it is 1.5kg/t~3.5kg/t to soak golden agent additive amount, and leaching is being inflated
Stirring is lower to leach for 24 hours~48h；
（6）Activated carbon is added into the ore pulp after leaching, obtains gold loaded carbon product and tailings；
（7）Gold loaded carbon obtains gold product and Tuo Jin charcoals by parsing, electrolysis and after smelting.
2. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 1, characterized in that the step（4）It is middle
Alkali is closed by sodium carbonate, sodium peroxide, sodium hydroxide and calcium oxide according to mass ratio（2~3）:（3~4）︰（9~10）︰（6~9）
It mixes；The total dosage of joint alkali is 10kg/t~100kg/t.
3. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 2, characterized in that the dosage of the joint alkali
For 30 ~ 50kg/t.
4. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 1, characterized in that filled when the Aerated stirring
Gas velocity rate is 0.5-1.0L/min.
5. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 1, characterized in that the golden agent of the leaching is cyaniding
Sodium and/or potassium cyanide.
6. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 1, characterized in that the step（6）Middle work
Property charcoal addition be 12-20g/L, adsorption time be 24-36 hours.
7. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 1, characterized in that the step（7）In
De- gold charcoal is back to step（6）It uses.
8. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 1, characterized in that the step（6）In
Tailings obtains dry tailings and filtrate water after filtering means dehydration, and there are Tailings Dam, filtrate water and concentration overflow waters to enter for dry tailings heap
Circulating water pool is transported to ore grinding and graded operation through water circulating pump.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439922A (en) * | 2018-11-27 | 2019-03-08 | 昆明理工大学 | A method of the Leaching of Gold from low-grade Refractory Au-ores |
| CN110923445A (en) * | 2019-10-18 | 2020-03-27 | 广西森合高新科技股份有限公司 | Method for recovering tailings of non-cyanide gold beneficiation |
| CN114622101A (en) * | 2022-03-09 | 2022-06-14 | 鹤庆北衙矿业有限公司 | Beneficiation method for comprehensively leaching and recovering gold and silver from gold and silver ores with high sulfur content |
| CN114985100A (en) * | 2022-06-02 | 2022-09-02 | 紫金矿业集团股份有限公司 | High-efficiency energy-saving beneficiation method for low-grade gold-bearing copper sulfide ore |
| CN115404351A (en) * | 2022-09-23 | 2022-11-29 | 广西鑫国顺矿业有限责任公司 | Low-temperature oxygen-enriched roasting gold extraction method for sulfur-arsenic-carbon-containing refractory gold ore |
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| CN1228480A (en) * | 1998-03-05 | 1999-09-15 | 中国科学院金属研究所 | Reinforced alkaline-leaching gold-extracting technology for arsenic-containing sulphur-containing difficult-to-extract gold ore |
| CN1334348A (en) * | 2000-07-19 | 2002-02-06 | 中国科学院金属研究所 | Agitator bath for pre-treating refractory As-containing gold ore by impregnating in strong alkali solution |
| CN102127653A (en) * | 2010-11-29 | 2011-07-20 | 长春黄金研究院 | Process for extracting gold by modified pressure oxidation-cyaniding |
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2018
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1228480A (en) * | 1998-03-05 | 1999-09-15 | 中国科学院金属研究所 | Reinforced alkaline-leaching gold-extracting technology for arsenic-containing sulphur-containing difficult-to-extract gold ore |
| CN1334348A (en) * | 2000-07-19 | 2002-02-06 | 中国科学院金属研究所 | Agitator bath for pre-treating refractory As-containing gold ore by impregnating in strong alkali solution |
| CN102127653A (en) * | 2010-11-29 | 2011-07-20 | 长春黄金研究院 | Process for extracting gold by modified pressure oxidation-cyaniding |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439922A (en) * | 2018-11-27 | 2019-03-08 | 昆明理工大学 | A method of the Leaching of Gold from low-grade Refractory Au-ores |
| CN110923445A (en) * | 2019-10-18 | 2020-03-27 | 广西森合高新科技股份有限公司 | Method for recovering tailings of non-cyanide gold beneficiation |
| CN114622101A (en) * | 2022-03-09 | 2022-06-14 | 鹤庆北衙矿业有限公司 | Beneficiation method for comprehensively leaching and recovering gold and silver from gold and silver ores with high sulfur content |
| CN114622101B (en) * | 2022-03-09 | 2024-02-13 | 鹤庆北衙矿业有限公司 | Mineral separation method for comprehensively leaching and recovering gold and silver from gold and silver ore with higher sulfur content |
| CN114985100A (en) * | 2022-06-02 | 2022-09-02 | 紫金矿业集团股份有限公司 | High-efficiency energy-saving beneficiation method for low-grade gold-bearing copper sulfide ore |
| CN115404351A (en) * | 2022-09-23 | 2022-11-29 | 广西鑫国顺矿业有限责任公司 | Low-temperature oxygen-enriched roasting gold extraction method for sulfur-arsenic-carbon-containing refractory gold ore |
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