CN108728640B - 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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- CN108728640B CN108728640B CN201810599059.5A CN201810599059A CN108728640B CN 108728640 B CN108728640 B CN 108728640B CN 201810599059 A CN201810599059 A CN 201810599059A CN 108728640 B CN108728640 B CN 108728640B
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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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- 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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Abstract
A kind of recovery process of arsenic-containing sulphur-containing type Gold includes the following steps: (1) by crushing raw ore to partial 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 greater than 14, then 15 DEG C~50 DEG C Aerated stirrings for 24 hours~30h；(5) it is added into ore pulp and soaks golden agent, soaking golden agent additive amount is 1.5kg/t~3.5kg/t, and for 24 hours~48h is leached under Aerated stirring；(6) active 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 charcoal 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 technique
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 lose ore
Industrial economics.
To be effectively utilized arsenic-containing sulphur-containing type gold mine, 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.
Summary of the invention
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 is adopted the following technical scheme that:
A kind of recovery process of arsenic-containing sulphur-containing type Gold, method and step are as follows:
Step 1: crushing raw ore, i.e. tcrude ore are crushed through two section of one closed circuit crushing process flow, it is crushed to final grain
Degree≤10mm；
Step 2: ore grinding and classification, i.e., broken raw ore feeds ball mill ore grinding, and ore grinding product feeds grader point
Grade, control Grading Overflow product granularity -0.074mm account for 80%~95%, ore pulp mass concentration 25%~35%；
Step 3: 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%；
Step 4: joint alkali, which is added, in underflow ore pulp carries out removal of impurities pretreatment, detailed process are as follows: joint alkali is added, then exists
15 DEG C~50 DEG C Aerated stirrings for 24 hours~30h, aeration speed 0.5-1.0L/min；The total dosage of joint alkali is 10kg/t~100kg/
T, preferably 30 ~ 50kg/t combine alkali by sodium carbonate, sodium peroxide, sodium hydroxide and calcium oxide according to mass ratio (2~3): (3
(9~10) ︰ (6~9) are mixed~4) ︰；
Step 5: Gold leaching, i.e., be added into pretreated ore pulp and soak golden agent, soak golden agent can be Cymag and/or
Potassium cyanide or other low toxicities soak golden agent, and additive amount is 1.5kg/t~3.5kg/t, leach under inflation, mechanical agitation into
Row, extraction time are for 24 hours~48h, inflation rate 0.5-1.0L/min；
Step 6: charcoal adsorbs, i.e., add active carbon into the ore pulp after leaching, active carbon 12g/L~20g/L, when absorption
Between for 24 hours~36h, obtain gold loaded carbon product and tailings；
Step 7: gold loaded carbon obtains gold product and Tuo Jin charcoal by conventional parsing, electrolysis and after smelting, gold charcoal is taken off
Charcoal absorption is back to continue to use；
Step 8: tailings obtains dry tailings and filtrate water after filtering means dehydration, dry tailings heap there are Tailings Dam, filtrate water and
Concentration overflow water enters circulating water pool, is transported to ore grinding and graded operation through water circulating pump.
The present invention mainly passes through the miscellaneous pretreatment of joint alkali leaching, first is that 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 is that 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 to soak golden agent and gold mineral is 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 Fu Jin 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.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Below in conjunction with specific embodiment, technical scheme is described further, 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 product
Position 0.25%, sulfur grade 0.5%, Iron grade 4.0%, zinc grade 0.3%, copper grade 0.2%, as shown in Figure 1, the specific steps are as follows:
Step 1: crushing raw ore, i.e. tcrude ore are crushed through two section of one closed circuit crushing process flow, it is crushed to final grain
Degree≤10mm；
Step 2: ore grinding and classification, i.e., broken raw ore feeds ball mill ore grinding, and ore grinding product feeds grader point
Grade, control Grading Overflow product granularity -0.074mm account for 80%, ore pulp mass concentration 35%；
Step 3: 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%；
Step 4: joint alkali, which is added, in underflow ore pulp carries out removal of impurities pretreatment, detailed process are as follows: 30kg/t is added and combines alkali,
Slurry pH is greater than 14 at this time, then in 15 DEG C of Aerated stirring 30h, aeration speed 0.5L/min；Joint alkali is by sodium carbonate, peroxide
Change sodium, sodium hydroxide and calcium oxide to mix according to 9 ︰ 6 of mass ratio 2:3 ︰；
Step 5: Gold leaching, i.e., be added into pretreated ore pulp and soak golden agent, soaking golden agent can be Cymag, add
Amount is 2.3kg/t, leaches and carries out under inflation, mechanical agitation, and extraction time is for 24 hours；Aeration speed 0.5L/min；Gold leaching
Extracting rate 86.50%；
Step 6: charcoal adsorbs, i.e., active carbon, active carbon 12g/L are added into the ore pulp after leaching, adsorption time 36h is obtained
To gold loaded carbon product (gold grade 3000g/t) and tailings；
Step 7: gold loaded carbon obtains gold product and Tuo Jin charcoal by conventional parsing, electrolysis and after smelting, gold charcoal is taken off
Charcoal absorption is back to continue to use；
Step 8: tailings obtains dry tailings and filtrate water after filtering means dehydration, dry tailings heap there are Tailings Dam, filtrate water and
Concentration overflow water enters circulating water pool, is transported to ore grinding and graded operation 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 product
Position 1%, sulfur grade 3%, Iron grade 6.0%, zinc grade 0.1%, copper grade 0.1%, as shown in Figure 1, the specific steps are as follows:
Step 1: crushing raw ore, i.e. tcrude ore are crushed through two section of one closed circuit crushing process flow, it is crushed to final grain
Degree≤10mm；
Step 2: ore grinding and classification, i.e., broken raw ore feeds ball mill ore grinding, and ore grinding product feeds grader point
Grade, control Grading Overflow product granularity -0.074mm account for 90%, ore pulp mass concentration 25%；
Step 3: 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%；
Step 4: joint alkali, which is added, in concentration underflow ore pulp carries out removal of impurities pretreatment, detailed process are as follows: joint alkali is added
50kg/t, at this time slurry pH be greater than 14, then 25 DEG C of Aerated stirrings for 24 hours, aeration speed 1.0L/min；Joint alkali is by carbonic acid
Sodium, sodium peroxide, sodium hydroxide and calcium oxide are mixed according to 10 ︰ 9 of mass ratio 3:4 ︰；
Step 5: Gold leaching, i.e., be added into pretreated ore pulp and soak golden agent, soaking golden agent is potassium cyanide, and additive amount is
3kg/t is leached and is carried out under inflation, mechanical agitation, extraction time 48h, aeration speed 1.0L/min, gold leaching rate
90%；
Step 6: charcoal adsorbs, i.e., active carbon, active carbon 20g/L are added into the ore pulp after leaching, adsorption time for 24 hours, obtains
To gold loaded carbon product (gold grade 4000g/t) and tailings；
Step 7: gold loaded carbon obtains gold product and Tuo Jin charcoal by conventional parsing, electrolysis and after smelting, gold charcoal is taken off
Charcoal absorption is back to continue to use；
Step 8: tailings obtains dry tailings and filtrate water after filtering means dehydration, dry tailings heap there are Tailings Dam, filtrate water and
Concentration overflow water enters circulating water pool, is transported to ore grinding and graded operation through water circulating pump.
Comparative example 1
With embodiment 2 the difference is that: the 4th step is pre-processed using sodium hydroxide, dosage 50kg/t, leaching
Agent cyaniding potassium application rate 3kg/t out, gold leaching rate 41%.
The main reason for comparative example gold leaching rate is low is that the then ore pulp viscosity increasing of sodium carbonate, sodium peroxide and calcium oxide is not added
Add, not exclusively, addition sodium carbonate can effectively improve the dispersion degree of leaching agent as ore pulp dispersing agent for gold exposure, 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 process flow.
Claims (5)
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) joint alkali is added in underflow ore pulp, then 15 DEG C~50 DEG C Aerated stirrings for 24 hours~30h, joins in the step (4)
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 30kg/t~50kg/t, and inflation rate is 0.5-1.0L/min when the Aerated stirring；
(5) it is added into pretreated ore pulp and soaks golden agent, soaking golden agent additive amount is 1.5kg/t~3.5kg/t, and leaching is being inflated
Stirring is lower to leach for 24 hours~48h；
(6) active 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 charcoal 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 golden agent of the leaching is cyaniding
Sodium and/or potassium cyanide.
3. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 1, characterized in that living in the step (6)
Property charcoal additional amount be 12-20g/L, adsorption time be 24-36 hours.
4. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 1, characterized in that in the step (7)
De- gold charcoal is back to step (6) use.
5. the recovery process of arsenic-containing sulphur-containing type Gold according to claim 1, characterized in that in the step (6)
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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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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
- 2018-06-12 CN CN201810599059.5A patent/CN108728640B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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