CN111054514A - Method for gold separation of gold ore - Google Patents
Method for gold separation of gold ore Download PDFInfo
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- CN111054514A CN111054514A CN201911166006.5A CN201911166006A CN111054514A CN 111054514 A CN111054514 A CN 111054514A CN 201911166006 A CN201911166006 A CN 201911166006A CN 111054514 A CN111054514 A CN 111054514A
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- gold
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 154
- 239000010931 gold Substances 0.000 title claims abstract description 154
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000000926 separation method Methods 0.000 title claims abstract description 22
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 58
- 239000011707 mineral Substances 0.000 claims abstract description 58
- 238000007885 magnetic separation Methods 0.000 claims abstract description 26
- 238000005188 flotation Methods 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 13
- 239000003814 drug Substances 0.000 claims abstract description 10
- 239000010453 quartz Substances 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000002000 scavenging effect Effects 0.000 claims description 133
- 239000012141 concentrate Substances 0.000 claims description 105
- 239000003795 chemical substances by application Substances 0.000 claims description 93
- 239000004088 foaming agent Substances 0.000 claims description 63
- 230000003213 activating effect Effects 0.000 claims description 30
- 238000011049 filling Methods 0.000 claims description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 4
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 3
- 210000003462 vein Anatomy 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 2
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 2
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- QWENMOXLTHDKDL-UHFFFAOYSA-N pentoxymethanedithioic acid Chemical compound CCCCCOC(S)=S QWENMOXLTHDKDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000010665 pine oil Substances 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052952 pyrrhotite Inorganic materials 0.000 abstract description 10
- 238000011084 recovery Methods 0.000 abstract description 8
- 239000011019 hematite Substances 0.000 abstract description 7
- 229910052595 hematite Inorganic materials 0.000 abstract description 7
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052683 pyrite Inorganic materials 0.000 abstract description 7
- 239000011028 pyrite Substances 0.000 abstract description 7
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 13
- 239000002245 particle Substances 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000007613 slurry method Methods 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 3
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229940116411 terpineol Drugs 0.000 description 3
- SZNYYWIUQFZLLT-UHFFFAOYSA-N 2-methyl-1-(2-methylpropoxy)propane Chemical compound CC(C)COCC(C)C SZNYYWIUQFZLLT-UHFFFAOYSA-N 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 2
- MJLGNAGLHAQFHV-UHFFFAOYSA-N arsenopyrite Chemical compound [S-2].[Fe+3].[As-] MJLGNAGLHAQFHV-UHFFFAOYSA-N 0.000 description 2
- 229910052964 arsenopyrite Inorganic materials 0.000 description 2
- 229910052951 chalcopyrite Inorganic materials 0.000 description 2
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 2
- 229910001919 chlorite Inorganic materials 0.000 description 2
- 229910052619 chlorite group Inorganic materials 0.000 description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- PQTCMBYFWMFIGM-UHFFFAOYSA-N gold silver Chemical compound [Ag].[Au] PQTCMBYFWMFIGM-UHFFFAOYSA-N 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910021646 siderite Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- XKGUKYPCHPHAJL-UHFFFAOYSA-N methanetetracarbonitrile Chemical compound N#CC(C#N)(C#N)C#N XKGUKYPCHPHAJL-UHFFFAOYSA-N 0.000 description 1
- 238000005456 ore beneficiation Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of mineral processing, and particularly relates to a method for gold separation of gold ores. The method for gold separation of gold ores comprises the following steps: the raw ore adopts the ore dressing process of flotation, strong magnetic separation and middling regrinding recleaning. The beneficiation method can enrich gold-bearing minerals such as quartz, pyrrhotite, pyrite, hematite and the like, and obtain higher gold grade and recovery rate. The invention adopts a float-magnetic combined process to recover gold-bearing minerals, namely, the easily-floated gold-bearing minerals are firstly separated by fast flotation, the gold-bearing magnetic minerals are separated by strong magnetic separation, and finally the difficultly-floated gold is separated by middling regrinding flotation. The beneficiation method has the advantages of simple process, stable operation, mature and reliable technology and convenience for field operation and management; the used medicament is environment-friendly, and the tailings do not contain cyanide, so that the emission standard is reached; meanwhile, the fineness of the coarse grinding ore is reduced, and most of tailings can be filled underground.
Description
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a method for gold separation of gold ores.
Background
In the prior gold production, aiming at gold-bearing ores of quartz vein type and altered rock type, a single flotation method is generally adopted, so that the recovery rate is lower, and the gold is extracted from raw ores by a full-mud cyanidation carbon slurry method without mineral separation and enrichment.
The gold extracting and smelting process with full-mud cyaniding carbon slurry method is that gold ore is first cyanided and leached after being crushed and argillized into ore slurry with (-200 mesh content over 90-95%), and then activated carbon is used to adsorb gold from the ore slurry and the gold slime is then separated, purified and smelted through carbon desorption and electrodeposition. The gold extraction smelting process by the full-mud carbon cyanide slurry method is the most widely applied gold extraction method with relatively mature process at present, and has the technical advantages of high recovery rate and low cost.
However, when the gold extraction smelting process is directly adopted for low-grade gold ores by the full-mud cyaniding carbon slurry method, the concentration of residual sodium cyanide in tailings is high, the treatment cost of the tailings is high, the tailings are relatively fine and are not suitable for underground filling, and the tailings can only be completely stockpiled to reduce the service life of the tailings pond, so that the production cost is greatly increased, the enterprise profit is reduced, and the long-term stable development of enterprises is greatly influenced.
Disclosure of Invention
In order to overcome the technical problems, the invention provides a method for gold separation of gold ores. The method can enrich gold minerals, improve the gold content, realize the purpose of direct sale of gold concentrate, provide higher-quality raw materials for metallurgical parts, and reduce the cost of low-grade direct hydrometallurgy; meanwhile, a combined process is adopted, the fineness of the coarse grinding ore is reduced, most of tailings can be filled underground, and the service life of a tailing dam is prolonged.
The method for gold separation of gold ores comprises the following steps: the raw ore adopts the ore dressing process of flotation, strong magnetic separation and middling regrinding recleaning.
The beneficiation method can enrich gold-bearing minerals such as quartz, pyrrhotite, pyrite, hematite and the like, and obtain higher gold grade and recovery rate. The invention adopts a float-magnetic combined process to recover gold-bearing minerals, namely, the easily-floated gold-bearing minerals are firstly separated by fast flotation, the gold-bearing magnetic minerals are separated by strong magnetic separation, and finally the difficultly-floated gold is separated by middling regrinding flotation. The beneficiation method has the advantages of simple process, stable operation, mature and reliable technology and convenience for field operation and management; the used medicament is environment-friendly, and the tailings do not contain cyanide, so that the emission standard is reached; meanwhile, the fineness of the coarse grinding ore is reduced, and most of tailings can be filled underground.
The method for separating gold from gold ore is applicable to various gold-containing ores, such as: the gold mineral is embedded between the gangue particles or the pyrrhotite and the gangue particles or in the gangue mineral cracks in an irregular and granular shape, and the granularity of the gold mineral is less than 20 mu m; the main carrier minerals of gold are quartz, hematite, chlorite, pyrrhotite, pyrite, etc. Or the gold mineral granularity is mainly fine gold and micro gold, the occupancy rate is more than 90%, and the granularity is less than 20 μm; the embedding state of the gold mineral is mainly wrapped with gold, the occupancy rate is more than 50 percent, and the granularity is less than 5 mu m; the main carrier minerals of gold are quartz, pyrrhotite, arsenopyrite, pyrite, chalcopyrite, hematite, calcite, siderite and the like. Particularly, the method has better ore dressing effect on ores with more gold carrier minerals, the cannabu granularity is mainly fine particles and the single flotation recovery rate is low.
In one embodiment of the present invention, the gold ore is a gold-containing ore of quartz vein type or altered rock type, or the gold-bearing mineral is a gold-containing mineral such as quartz, pyrrhotite, pyrite, hematite, or the like.
The flotation comprises the following steps: primary roughing, secondary roughing, primary scavenging, secondary scavenging and fine selecting; the method specifically comprises the following steps:
the primary roughing comprises the following steps: adding a collecting agent and a foaming agent into the ore pulp to collect the gold minerals to obtain primary rougher concentrate and primary rougher tailings; the primary roughing tailings are used as feeding for secondary roughing, and the primary roughing concentrate is used as part of feeding for primary concentration.
The collecting agent is selected from one or more of sodium isobutyl ether, butyl xanthate, butylamine black pigment, ethyl xanthate or amyl xanthate.
Wherein the foaming agent is selected from one or more of pine oil, BK201 or BK 204.
Wherein the addition amount of the collecting agent is 120g/t in terms of ore feeding amount, and the addition amount of the foaming agent is 15-20 g/t.
The secondary roughing comprises the following steps: adding a collecting agent and a foaming agent into the primary rougher tailings to collect gold minerals to obtain secondary rougher concentrate and secondary rougher tailings; wherein, the secondary rougher tailings are used as the feeding of the primary scavenging, and the secondary rougher concentrate is used as the partial feeding of the concentration.
Wherein the addition amount of the collecting agent is 50-60g/t and the addition amount of the foaming agent is 10-15g/t according to the ore feeding amount.
The primary scavenging comprises: adding an activating agent, a collecting agent and a foaming agent into the secondary rougher tailings to collect gold minerals to obtain primary scavenging concentrate and primary scavenging tailings; wherein the primary scavenging tailings are used as feeding for secondary scavenging, and the primary scavenging concentrate is used as part feeding for middling regrinding.
Wherein the activating agent is selected from one or more of copper sulfate, oxalic acid, sodium sulfide, sodium carbonate or ammonium chloride. Wherein the addition amount of the activating agent is 300-500g/t according to the ore feeding amount.
Wherein, according to the ore feeding amount, the addition amount of the activating agent is 100-300 g/t; the addition amount of the collecting agent is 20-30 g/t; the addition amount of the foaming agent is 5-10 g/t.
The secondary scavenging comprises: adding a collecting agent and a foaming agent into the primary scavenging tailings to collect gold minerals to obtain secondary scavenging concentrate and secondary scavenging tailings; wherein, the tailings of the secondary scavenging are used as strong magnetic separation feeding, and the concentrate of the secondary scavenging is used as part feeding of middling regrinding.
Wherein the addition amount of the collecting agent is 20-30g/t and the addition amount of the foaming agent is 5-10g/t according to the ore feeding amount.
The fine selection comprises the following steps: adding no medicament into the secondary rough concentration concentrate for blank concentration to obtain concentrated concentrate and concentrated tailings; wherein the concentration concentrate is sold as a product, and the concentration tailings are used as part of middling regrinding for ore feeding.
In order to further improve the effect of the primary roughing, the primary roughing is preceded by a rough grinding treatment. The coarse grinding is to add an activating agent into raw ore and grind the raw ore to ore pulp with the fineness of-0.074 mm accounting for 60-65% and the mass concentration of 30-35%.
The strong magnetic separation comprises the following steps: directly feeding the secondary scavenged tailings into a strong magnetic separator for magnetic separation to obtain strong magnetic concentrate and strong magnetic tailings; wherein the strong magnetic separation tailings are used for underground filling, and the strong magnetic separation concentration is used as part of ore feeding for middling regrinding.
Wherein the magnetic field intensity of the strong magnetic separation is 0.7T-1.2T.
In order to further enrich gold minerals and improve the gold content, the concentrate obtained by the primary scavenging and the secondary scavenging, the concentrate obtained by the strong magnetic separation and the concentration tailings are combined to be subjected to middling regrinding and recleaning treatment.
The middling regrinding and recleaning comprises middling regrinding, middling roughing, primary middling scavenging, secondary middling scavenging and middling concentrating.
The middling regrinding is to add an activating agent into ore pulp consisting of primary scavenging concentrate, secondary scavenging concentrate, concentration tailings and magnetic separation concentrate, and grind the ore pulp to the fineness of-0.038 mm, wherein the ore pulp accounts for 80-90% of the mass concentration.
Wherein the addition amount of the activating agent is 50-100g/t according to the ore feeding amount.
The middling roughing comprises the following steps: adding a collecting agent and a foaming agent into the ore pulp obtained by regrinding the middlings to collect the gold minerals, so as to obtain middling rougher concentrates and middling rougher tailings; wherein, the middling rougher flotation concentrate is used as the feeding for middling cleaner flotation, and the middling rougher flotation tailings are used as the feeding for primary middling scavenging.
Wherein the addition amount of the collecting agent is 20-30g/t and the addition amount of the foaming agent is 5-10g/t according to the ore feeding amount.
The primary middling scavenging comprises the following steps: adding a collecting agent and a foaming agent into the middling roughing tailing pulp to collect gold minerals to obtain primary middling scavenging concentrate and primary middling scavenging tailings; wherein, the primary middling scavenging tailings are used as feeding for secondary middling scavenging, and the primary middling scavenging concentrate is returned to the middling roughing step to form closed cycle.
Wherein the addition amount of the collecting agent is 15-20g/t and the addition amount of the foaming agent is 5-10g/t according to the ore feeding amount.
The secondary middling scavenging comprises: adding a collecting agent and a foaming agent into the primary middling scavenging tailings to collect gold minerals to obtain secondary middling scavenging concentrate and secondary middling scavenging tailings; and the secondary middling scavenging tailings are taken as a final tailing stockpiling tailing pond, and the secondary middling scavenging concentrate returns to the primary middling scavenging step to form closed cycle.
Wherein the addition amount of the collecting agent is 15-20g/t and the addition amount of the foaming agent is 5-10g/t according to the ore feeding amount.
The middling concentration comprises the following steps: adding no medicament into the middling roughing concentrates for blank concentration to obtain middling roughing concentrates and middling roughing tailings; wherein the middling concentration concentrate is sold as a product, and the middling concentration tailings are returned to the middling roughing step to form a closed cycle.
The collecting agent, the activating agent and the foaming agent used in each step of the method are the same.
The invention has the following beneficial effects:
1) the invention adopts the combined process of flotation and magnetic separation to recover the gold minerals in the gold ores, namely part of easily-floated gold minerals are floated by flotation, and then the gold-loaded minerals which are not easy to float but have magnetism are separated by magnetic separation, thereby further enriching the gold minerals and improving the gold recovery rate.
2) The invention adopts stage grinding stage separation, thereby reducing the overall energy consumption.
3) The main process grinding fineness is thicker, and a large amount of coarse-grained tailings are produced for underground filling, so that the underground filling cost is reduced, and the service life of a tailing dam is prolonged.
4) The method has the advantages of simple process, convenient control, high separation efficiency, excellent method index and high quality of the obtained gold concentrate.
Drawings
Fig. 1 is a schematic view of a flotation-magnetic flow process of the gold ore beneficiation method of the embodiment 1 of the present invention.
Fig. 2 is a schematic view of the overall processing flow of the method for gold concentration of gold ores in embodiment 1 of the present invention.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
The embodiment provides a method for gold ore gold separation. The gold grade in the gold ore is 2.8g/t-3.0 g/t.
The valuable element of the gold ore is gold, most of the gold minerals in the ore are natural gold, and a small amount of silver gold ore; the gold mineral is mainly embedded between the gangue particles or the pyrrhotite and the gangue particles in an irregular and granular shape, then embedded in the gaps of the gangue particles in a granular and strip shape, and a small amount of the gold mineral is wrapped in the gangue particles and the pyrrhotite in a micro-fine particle inclusion form, wherein the granularity of the gold mineral is mainly fine gold particles and micro gold particles, the occupancy rate of the gold mineral is 93%, and the granularity is all less than 20 mu m.
The main carrier minerals of gold are quartz, hematite, chlorite, pyrrhotite, pyrite, etc.
The gold separation method for gold ores is a mineral separation process of flotation-strong magnetic separation-middling regrinding recleaning for raw ores, the process flow is shown in figures 1 and 2, and the method comprises the following mineral separation steps:
coarse grinding: adding an activating agent into raw ore, and grinding the raw ore to ore pulp with the fineness of-0.074 mm accounting for 65% and the mass concentration of 32%; according to the ore feeding amount: the dosage of the activating agent is 500 g/t;
primary rough selection: adding a gold mineral collecting agent and a foaming agent into the ore pulp, wherein the gold mineral collecting agent and the foaming agent are calculated according to the ore feeding amount: the dosage of the collecting agent is 100g/t, and the dosage of the foaming agent terpineol oil is 20 g/t; stirring, and carrying out primary roughing operation to obtain primary roughed concentrate and primary roughed tailings. The primary roughing tailings are used as secondary roughing feed, and the primary roughing concentrate is used as fine feed.
Secondary rough separation: adding a collecting agent and a foaming agent into the primary rougher tailing pulp according to the feed amount: the dosage of the collecting agent is 50g/t, and the dosage of the foaming agent is 10 g/t; and stirring, and performing secondary roughing operation to obtain secondary roughing concentrate and secondary concentrating tailings, wherein the secondary roughing tailings are used as primary scavenging feed, and the secondary roughing concentrate is used as part of primary concentrating feed.
Primary scavenging: adding an activating agent, a collecting agent and a foaming agent into the secondary rougher tailing pulp according to the selected ore amount: the using amount of the activating agent is 300g/t, the using amount of the collecting agent is 30g/t, and the using amount of the foaming agent is 10 g/t; stirring, and carrying out primary scavenging operation to obtain primary scavenging concentrate and primary scavenging tailings; the primary scavenging tailings are used as secondary scavenging feed ores, and the primary scavenging concentrate is used as part feed ores for middling regrinding.
Secondary scavenging: adding a collecting agent and a foaming agent into the primary scavenging tailing pulp, wherein the collecting agent and the foaming agent are calculated according to the ore feeding amount: the dosage of the collecting agent is 20g/t, and the dosage of the foaming agent is 5 g/t; stirring, and carrying out secondary scavenging operation to obtain secondary scavenging concentrate and secondary scavenging tailings; the secondary scavenging tailings are used for magnetic separation feeding, and the secondary scavenging is used for partial feeding of middling regrinding.
Selecting: adding no medicament into the ore pulp of the secondary roughing concentrate for blank concentration to obtain primary concentrate and primary concentrate middling; the first concentration concentrate is sold as a product, and the first concentration tailings are used as part of middling regrinding for ore feeding.
Strong magnetic separation: and (3) directly feeding the secondary scavenging tailings into a strong magnetic machine to carry out a magnetic field (the magnetic field intensity is 0.8T) to obtain magnetic concentrate and magnetic tailings, wherein the magnetic tailings are used for underground filling, and the magnetic concentration middlings are used as part of middlings reground for ore feeding.
Regrinding middlings: the ore pulp consists of concentrated tailings, primary scavenging concentrate, secondary scavenging concentrate and magnetic separation concentrate, an activating agent is added into the ore pulp, and the ore pulp is ground to the fineness of-0.038 mm accounting for 80-90% of the mass concentration. According to the selected ore amount: the dosage of the activating agent is 100 g/t;
roughing middlings: adding a collecting agent and a foaming agent into the reground ore pulp, and according to the selected ore amount: the using amount of the collecting agent is 30g/t, the using amount of the foaming agent is 10g/t, stirring is carried out, and middling roughing operation is carried out to obtain middling roughing concentrate and middling roughing tailings; the middling rougher tailings are used as primary middling scavenging feed, and middling rougher concentrate is used as feed for middling cleaning.
Primary middling scavenging: adding a collecting agent and a foaming agent into the middling roughing tailing pulp, and according to the selected ore amount: the dosage of the collecting agent is 20g/t, and the dosage of the foaming agent is 10 g/t; stirring, and carrying out primary middling scavenging operation to obtain primary middling scavenging concentrate and primary middling scavenging tailings; the primary middling scavenging tailings are used as secondary middling scavenging feed ores, and primary scavenging concentrate is returned to the middling roughing step to form closed cycle.
Secondary middling scavenging: adding a collecting agent and a foaming agent into the primary middling scavenging tailing pulp, and according to the selected ore amount: the dosage of the collecting agent is 15g/t, and the dosage of the foaming agent is 5 g/t; stirring, and performing secondary middling scavenging operation to obtain secondary middling scavenging concentrate and secondary middling scavenging tailings; and (3) taking the scavenged secondary middling tailings as a final tailing stockpiling tailing pond, and returning the scavenged secondary concentrate to the scavenged primary middling step to form closed cycle.
And (3) middling concentration: and (3) carrying out blank concentration without adding any medicament in the middling roughing concentrate pulp to obtain middling roughing concentrate and middling roughing tailings, wherein the middling roughing concentrate is sold as a product, and the middling roughing tailings are returned to the middling roughing step to form closed cycle.
The test closed circuit results obtained were: the gold grade in the raw ore is 2.96g/t, and after the gold is extracted by the method, the gold grade in the gold concentrate is 36.54g/t, and the gold recovery rate is 86.34%.
Example 2
The embodiment provides a method for gold ore gold separation. The gold grade in the gold ore is 5.1g/t-5.3 g/t.
The valuable element in the gold ore is gold, and the gold ore comprises natural gold and silver gold ore, wherein the natural gold is the main gold ore. The gold mineral particle size is 97.51% mainly of fine gold and particulate gold. The embedded state of the gold mineral is that the coating gold accounts for 53.31 percent, the secondary grain gold accounts for 32.24 percent, and a small amount of crack gold accounts for 14.45 percent.
The main carrier minerals of gold are quartz, pyrrhotite, arsenopyrite, pyrite, chalcopyrite, hematite, calcite, siderite and the like.
The gold separation method of the gold ore is a mineral separation process of adopting flotation-strong magnetic separation-middling regrinding recleaning for raw ore, and comprises the following mineral separation steps:
coarse grinding: adding an activating agent into raw ore, and grinding the raw ore to ore pulp with the fineness of-0.074 mm accounting for 65% and the mass concentration of 32%; according to the ore feeding amount: the dosage of the activating agent is 500 g/t;
primary rough selection: adding a gold mineral activating agent, a collecting agent and a foaming agent into the ore pulp, wherein the gold mineral activating agent, the collecting agent and the foaming agent are calculated according to the ore feeding amount: the using amount of the collecting agent is 120g/t, and the using amount of the foaming agent terpineol oil is 20 g/t; stirring, and carrying out primary roughing operation to obtain primary roughed concentrate and primary roughed tailings. The primary roughing tailings are used as secondary roughing feed, and the primary roughing concentrate is used as fine feed.
Secondary rough separation: adding a collecting agent and a foaming agent into the primary rougher tailing pulp according to the feed amount: the dosage of the collecting agent is 60g/t, and the dosage of the foaming agent is 15 g/t; and stirring, and performing secondary roughing operation to obtain secondary roughing concentrate and secondary concentrating tailings, wherein the secondary roughing tailings are used as primary scavenging feed, and the secondary roughing concentrate is used as part of primary concentrating feed.
Primary scavenging: adding an activating agent, a collecting agent and a foaming agent into the secondary rougher tailing pulp according to the selected ore amount: the using amount of the activating agent is 300g/t, the using amount of the collecting agent is 25g/t, and the using amount of the foaming agent is 10 g/t; stirring, and carrying out primary scavenging operation to obtain primary scavenging concentrate and primary scavenging tailings; the primary scavenging tailings are used as secondary scavenging feed ores, and the primary scavenging concentrate is used as part feed ores for middling regrinding.
Secondary scavenging: adding a collecting agent and a foaming agent into the primary scavenging tailing pulp, wherein the collecting agent and the foaming agent are calculated according to the ore feeding amount: the using amount of the collecting agent is 25g/t, and the using amount of the foaming agent terpineol oil is 10 g/t; stirring, and carrying out secondary scavenging operation to obtain secondary scavenging concentrate and secondary scavenging tailings; the secondary scavenging tailings are used for strong magnetic separation feeding, and the secondary scavenging is used for partial feeding of middling regrinding.
Selecting: adding no medicament into the ore pulp of the secondary roughing concentrate for blank concentration to obtain primary concentrate and primary concentrate middling; the first concentration concentrate is sold as a product, and the first concentration tailings are used as part of middling regrinding for ore feeding.
Strong magnetic separation: and (3) directly feeding the secondary scavenging tailings into a strong magnetic machine to carry out a magnetic field (the magnetic field intensity is 1.2T) to obtain magnetic concentrate and magnetic tailings, wherein the magnetic tailings are used for underground filling, and the magnetic concentration middlings are used as part of middlings reground for ore feeding.
Regrinding middlings: the ore pulp consists of concentrated tailings, primary scavenging concentrate, secondary scavenging concentrate and magnetic separation concentrate, an activating agent is added into the ore pulp, and the ore pulp is ground to the fineness of-0.038 mm accounting for 80-90% of the mass concentration. According to the selected ore amount: the dosage of the activating agent is 50 g/t;
roughing middlings: adding an activating agent, a collecting agent and a foaming agent into ore pulp obtained by regrinding the selected tailings, the primary scavenging concentrate, the secondary scavenging concentrate and the strong magnetic concentrate, wherein the ore pulp is measured according to the selected ore amount: 25g/t of collecting agent and 10g/t of foaming agent are stirred and subjected to middling roughing operation to obtain middling roughing concentrate and middling roughing tailings; the middling rougher tailings are used as the first middling scavenging feeding, and the middling rougher concentrate middling cleaning feeding.
Primary middling scavenging: adding a collecting agent and a foaming agent into the middling roughing tailing pulp, and according to the selected ore amount: the dosage of the collecting agent is 15g/t, and the dosage of the foaming agent is 10 g/t; stirring, and carrying out primary middling scavenging operation to obtain primary middling scavenging concentrate and primary middling scavenging tailings; the primary middling scavenging tailings are used as secondary middling scavenging feed ores, and primary scavenging concentrate is returned to the middling roughing step to form closed cycle.
Secondary middling scavenging: adding a collecting agent and a foaming agent into the primary middling scavenging tailing pulp, and according to the selected ore amount: the dosage of the collecting agent is 15g/t, and the dosage of the foaming agent is 5 g/t; stirring, and performing secondary middling scavenging operation to obtain secondary middling scavenging concentrate and secondary middling scavenging tailings; the scavenged tailings of the secondary middlings are taken as a final tailing stockpiling tailing pond, and the scavenged concentrate of the secondary middlings is returned to the scavenging step of the primary middlings to form closed cycle; .
And (3) middling concentration: and (3) carrying out blank concentration without adding any medicament in the middling roughing concentrate pulp to obtain middling concentrating concentrate and middling concentrating tailings, wherein the middling concentrating concentrate is sold as a product, and the concentrated middling is returned to the middling roughing step to form closed cycle.
The test closed circuit results obtained were: the gold grade in the raw ore is 5.2g/t, and after the gold is extracted by the method, the gold grade in the gold concentrate is 49.78g/t, and the gold recovery rate is 92.75%.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. A method for gold separation of gold ore is characterized by comprising the following steps: the raw ore adopts the ore dressing process of flotation, strong magnetic separation and middling regrinding recleaning.
2. The method for separating gold from gold ore according to claim 1, wherein the gold ore is a gold-containing ore of quartz vein type or altered rock type.
3. The method for gold concentration of gold ore according to claim 1 or 2, characterized in that the flotation comprises: primary roughing, secondary roughing, primary scavenging, secondary scavenging and fine selecting.
4. The method for gold separation of gold ore according to claim 3 wherein the primary roughing comprises: adding a collecting agent and a foaming agent into the ore pulp to collect the gold minerals to obtain primary rougher concentrate and primary rougher tailings; the primary roughing tailings are used as feeding for secondary roughing, and the primary roughing concentrate is used as part of fine concentration;
wherein, preferably, the collecting agent is selected from one or more of sodium isobutyl, butyl xanthate, butylamine black, ethyl xanthate or amyl xanthate;
and/or, preferably, the foaming agent is selected from one or more of pine oil, BK201 or BK 204;
and/or, preferably, the addition amount of the collecting agent is 100-120g/t and the addition amount of the foaming agent is 15-20g/t according to the ore feeding amount;
the secondary roughing comprises the following steps: adding a collecting agent and a foaming agent into the primary rougher tailings to collect gold minerals to obtain secondary rougher concentrate and secondary rougher tailings; wherein, the secondary rougher tailings are used as the feeding of the primary scavenging, and the secondary rougher concentrate is used as the part of the feeding of the concentration;
preferably, the addition amount of the collecting agent is 50-60g/t and the addition amount of the foaming agent is 10-15g/t according to the ore feeding amount;
the primary scavenging comprises: adding an activating agent, a collecting agent and a foaming agent into the secondary rougher tailings to collect gold minerals to obtain primary scavenging concentrate and primary scavenging tailings; wherein the primary scavenging tailings are used as feeding for secondary scavenging, and the primary scavenging concentrate is used as part feeding for regrinding middlings;
wherein, preferably, the activating agent is selected from one or more of copper sulfate, oxalic acid, sodium sulfide, sodium carbonate or ammonium chloride;
preferably, the addition amount of the activating agent is 300-500g/t according to the ore feeding amount;
and/or, preferably, the addition amount of the activating agent is 100-300g/t according to the ore feeding amount; the addition amount of the collecting agent is 20-30 g/t; the addition amount of the foaming agent is 5-10 g/t;
the secondary scavenging comprises: adding a collecting agent and a foaming agent into the primary scavenging tailings to collect gold minerals to obtain secondary scavenging concentrate and secondary scavenging tailings; wherein, the tailings of the secondary scavenging are used as strong magnetic separation feeding ores, and the concentrate of the secondary scavenging is used as part feeding ores of middling regrinding;
preferably, the addition amount of the collecting agent is 20-30g/t and the addition amount of the foaming agent is 5-10g/t according to the ore feeding amount;
the fine selection comprises the following steps: adding no medicament into the secondary rough concentration concentrate for blank concentration to obtain concentrated concentrate and concentrated tailings; wherein the concentration concentrate is sold as a product, and the concentration tailings are used as part of middling regrinding for ore feeding.
5. The method for separating gold from gold ore according to claim 3 wherein a coarse grinding process is performed between the first roughing.
6. The method for separating gold from gold ore according to claim 5, wherein the coarse grinding is to add an activating agent into the raw ore and grind the raw ore to ore pulp with the fineness of-0.074 mm accounting for 60-65% and the mass concentration of 30-35%.
7. The method for gold concentration of gold ore according to any one of claims 1 to 6, wherein the strong magnetic separation comprises: the secondary scavenged tailings enter a strong magnetic machine for magnetic separation to obtain strong magnetic concentrate and strong magnetic tailings; wherein the strong magnetic separation tailings are used for underground filling, and the strong magnetic separation concentration is used as part of ore feeding for middling regrinding;
preferably, the magnetic field intensity of the strong magnetic selection is 0.7T-1.2T.
8. The method for gold concentration of gold ore according to any one of claims 1 to 7, wherein the middling regrinding recleaning comprises: regrinding middlings, roughing middlings, scavenging middlings for the first time, scavenging middlings for the second time and concentrating the middlings.
9. The method for gold concentration in gold ore according to claim 8, wherein the middling regrinding is to add an activating agent into ore pulp consisting of primary scavenging concentrate, secondary scavenging concentrate, concentration tailings and magnetic concentrate, and grind the ore pulp to a fineness of-0.038 mm at a mass concentration of 80-90%;
wherein, according to the ore feeding amount, the addition amount of the activating agent is 50-100 g/t;
the middling roughing comprises the following steps: adding a collecting agent and a foaming agent into the ore pulp obtained by regrinding the middlings to collect the gold minerals, so as to obtain middling rougher concentrates and middling rougher tailings; wherein, the middling roughing concentrate is used as the feeding for middling concentration, and the middling roughing tailings are used as the feeding for primary middling scavenging;
wherein the addition amount of the collecting agent is 20-30g/t and the addition amount of the foaming agent is 5-10g/t according to the ore feeding amount;
the primary middling scavenging comprises the following steps: adding a collecting agent and a foaming agent into the middling roughing tailing pulp to collect gold minerals to obtain primary middling scavenging concentrate and primary middling scavenging tailings; wherein, the primary middling scavenging tailings are used as feeding for secondary middling scavenging, and primary middling scavenging concentrate is returned to the middling roughing step to form closed cycle;
the addition amount of the collecting agent is 15-20g/t and the addition amount of the foaming agent is 5-10g/t according to the ore feeding amount;
the secondary middling scavenging comprises: adding a collecting agent and a foaming agent into the primary middling scavenging tailings to collect gold minerals to obtain secondary middling scavenging concentrate and secondary middling scavenging tailings; wherein the secondary middling scavenging tailings are taken as a final tailing stockpiling tailing pond, and the secondary middling scavenging concentrate returns to the primary middling scavenging step to form closed cycle;
the addition amount of the collecting agent is 15-20g/t and the addition amount of the foaming agent is 5-10g/t according to the ore feeding amount;
the middling concentration comprises the following steps: adding no medicament into the middling roughing concentrates for blank concentration to obtain middling roughing concentrates and middling roughing tailings; wherein the middling concentration concentrate is sold as a product, and the middling concentration tailings are returned to the middling roughing step to form a closed cycle.
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| CN112619889A (en) * | 2021-01-06 | 2021-04-09 | 矿冶科技集团有限公司 | Method for selecting copper and nickel from copper-nickel ore |
| CN114471955A (en) * | 2022-01-05 | 2022-05-13 | 肃北县金鹰黄金有限责任公司 | Method for efficiently recovering gold in tailings based on flotation process |
| CN114618684A (en) * | 2022-03-14 | 2022-06-14 | 长沙矿山研究院有限责任公司 | Flotation method for enhanced gold-loaded pyrite in high-mud environment |
| CN115069424A (en) * | 2021-03-12 | 2022-09-20 | 东北大学 | Alkali-acid interchange flotation gold extraction process for carbonate type gold ore |
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