CN105797848B - A kind of high intensity magnetic separation that includes is thrown in advance except the golden method of reinforcing leaching of thin mud in golden iron oxide ore - Google Patents
A kind of high intensity magnetic separation that includes is thrown in advance except the golden method of reinforcing leaching of thin mud in golden iron oxide ore Download PDFInfo
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- CN105797848B CN105797848B CN201610158338.9A CN201610158338A CN105797848B CN 105797848 B CN105797848 B CN 105797848B CN 201610158338 A CN201610158338 A CN 201610158338A CN 105797848 B CN105797848 B CN 105797848B
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- 238000002386 leaching Methods 0.000 title claims abstract description 77
- 238000007885 magnetic separation Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 54
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 19
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 85
- 239000011707 mineral Substances 0.000 claims abstract description 85
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 73
- 229910052737 gold Inorganic materials 0.000 claims abstract description 73
- 239000010931 gold Substances 0.000 claims abstract description 73
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 69
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 68
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052742 iron Inorganic materials 0.000 claims abstract description 34
- 239000012141 concentrate Substances 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 21
- 238000005516 engineering process Methods 0.000 claims abstract description 18
- 238000000605 extraction Methods 0.000 claims abstract description 17
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims description 23
- 239000002002 slurry Substances 0.000 claims description 18
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 11
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 10
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 10
- 239000004571 lime Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 230000005307 ferromagnetism Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000004927 clay Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- NPEWZDADCAZMNF-UHFFFAOYSA-N gold iron Chemical compound [Fe].[Au] NPEWZDADCAZMNF-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000969 carrier Substances 0.000 abstract description 2
- 230000005389 magnetism Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000003610 charcoal Substances 0.000 description 8
- 238000001914 filtration Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- YXDWYSXVJXFERU-UHFFFAOYSA-N gold oxoiron Chemical compound [Au][Fe]=O YXDWYSXVJXFERU-UHFFFAOYSA-N 0.000 description 5
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910001608 iron mineral Inorganic materials 0.000 description 2
- 239000001272 nitrous oxide Substances 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000416536 Euproctis pseudoconspersa Species 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229960000633 dextran sulfate Drugs 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001180 sulfating effect Effects 0.000 description 1
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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- 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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- 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
It is thrown in advance except the method for the reinforcing technology for gold extraction of thin mud in golden iron oxide ore including high intensity magnetic separation the invention discloses a kind of.It is that low intensity magnetic separation enrichment carrier mineral magnetic iron ore will be first passed through to ore deposit, obtains strongly magnetic mineral and low intensity magnetic separation tailing, gained low intensity magnetic separation tailing is subjected to high intensity magnetic separation ore dressing, obtains weak magnetic mineral and non magnetic ore；It throws except non magnetic ore；Then Cyanide Leaching processing is carried out respectively for strongly magnetic mineral and weak magnetic mineral, respectively obtain magnetite concentrate, brown iron ore concentrate and gold loaded carbon.The present invention is creatively for the magnetism difference of the different carriers mineral of gold and to the carrier mineral Scientific grouping of gold, targetedly Cyanide Leaching processing is carried out after grouping again, effectively increase the Gold leaching efficiency of Cyanide Leaching processing and the rate of recovery of gold, it is with obvious effects, production cost is low, can significantly improve the beneficiation method of the golden efficiency of leaching, be particularly suitable for the recycling of the larger golden iron oxide ore gold iron of clay content.
Description
Technical field
The present invention relates to the beneficiation methods of the high iron gold oxide ore of amount containing thin mud, include by force more particularly, to one kind
Magnetic separation is thrown in advance except the golden method of reinforcing leaching of thin mud in golden iron oxide ore.
Background technology
Gold is exactly a kind of very important noble metal since ancient times.It is wide due to its good physics and chemical property
It is general to be applied to the industries such as processing of ornament, finance deposit, aerospace and modern communication.
But with the increasing of gold mining amount, free-milling ore is fewer and fewer at present, the difficulty that this field is faced
Ore dressing stone is more and more, and the gold ore that can be effectively recycled by the method for gravity-floatation is also fewer and fewer.
It is existing to study the extraction of gold process for providing Refractory Au-ores, for example, the China of Publication No. CN201010581979 is specially
Profit application discloses a kind of extraction of gold process of Refractory Au-ores, using the secondary low temperature acid roasting-medium temperature sulphur of sulfating roasting-slag
Acidification decomposition-cyanidation gold-extracted secondary low temperature acid roasting the oxygen of slag progress worked continuously, utilize conventional dextran sulfate roasting
Change, carry out medium temperature roast later and decompose sulfate, then carry out Cyanide Leaching again by fine grinding, make to be wrapped in carbon, arsenic, sulphur
By high efficiente callback, the shortcomings that technical solution is indissoluble gold
Acidizing fired and low temperature medium temperature acidification is decomposed, it is not easy to be operated, flow is complex, is unfavorable for industrial
It promotes；The Chinese patent application of Publication No. CN02114574 discloses a kind of activaled prussiate gold leaching-out process, and this method is used
Activaled prussiate gold leaching-out process be make under the action of activator gold change and activate in mineral internal structure, then use
Cyaniding extraction gold, the core of the technical solution are the mechanisms of catalytic reaction using nitrous oxide and metal, be elemental oxygen with
Gold reaction makes gold be reacted after being detached from lattice with cyanide, but is passed through nitrous oxide due to lasting industrially and is not allowed
It easily realizes, therefore the technical solution has apparent limitation in actual production, the golden rate of recovery also has no apparent raising；It is public
The Chinese patent application that the number of opening is CN200810050526 discloses a kind of composite mineral-leaching bacteria colony and its in biological metallurgy application, refers to
Go out to have carried out the leaching gold experimental study of this kind of composite mineral-leaching bacteria colony in 35 DEG C~52 DEG C of temperature range, since flora is for temperature
The factors such as the limitation of degree condition and leaching cycle length, therefore the technical solution is also unfavorable for the popularization of industry at present.
In addition, also by the research that floatation sorts gold ore, but since floatation cannot be by gold ore
Grade is increased to a higher rank, therefore the later stage still needs the processing by Cyanide Leaching.
Method the most cost-effective is still the method for Cyanide Leaching, but prior art is difficult to ensure that in gold ore
The rate of recovery of gold.Therefore, for the efficiency for improving the rate of recovery of gold and leaching, there is an urgent need for sum up one kind more effectively, more rationally
Leaching-out technique scheme.
Invention content
The purpose of the present invention is be directed to the rate of recovery present in the beneficiation method of the high iron gold oxide ore of existing clay content it is low,
The deficiencies of production cost is high, grade is relatively low provides a kind of thrown in advance including high intensity magnetic separation except the reinforcing leaching of thin mud in golden iron oxide ore
The method of technology for gold.
The purpose of the present invention is achieved by the following technical programs：
It is thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore including high intensity magnetic separation the present invention provides a kind of
Method is will to first pass through low intensity magnetic separation enrichment carrier mineral magnetic iron ore to ore deposit, obtain strongly magnetic mineral and low intensity magnetic separation tailing, and gained is weak
Magnetic tailing carries out high intensity magnetic separation ore dressing, obtains weak magnetic mineral and non magnetic ore；It throws except non magnetic ore；Then it is directed to strong magnetic
Property mineral and weak magnetic mineral carry out Cyanide Leaching processing respectively, respectively obtain magnetite concentrate, brown iron ore concentrate and gold loaded carbon.This hair
It is bright using low intensity magnetic separation enrichment carrier mineral magnetic iron ore is first passed through, then targetedly Cyanide Leaching；Pass through high intensity magnetic separation richness again
Collect the carrier mineral limonite of gold, then targetedly Cyanide Leaching.Also, it is thrown in advance except in iron gold ore by high intensity magnetic separation
Thin mud, and avoid the absorption of gold that thin mud dissolves out cyaniding.
Preferably, described to ore deposit is through roughly grinding, being classified, after grinding particle size is accounted for 60~80% mineral aggregate for -0.074mm
Into low intensity magnetic separation；It is preferred that grinding particle size is accounted for 70% mineral aggregate for -0.074mm enters low intensity magnetic separation.
Preferably, the magnetic field intensity of the low intensity magnetic separation is 0.15T~0.25T.
Preferably, the method for carrying out Cyanide Leaching processing for strongly magnetic mineral is by the concentrated tune of the strongly magnetic mineral
It starches to 20%~30% pulp density, and it is 11 to adjust slurry pH, adds in Cymag and carries out Cyanide Leaching, obtains leachate 1,
By the activated carbon adsorption of leachate 1, magnetite concentrate and gold loaded carbon are obtained.Preferably, concentration is sized mixing to 25% pulp density.
Preferably, the magnetic field intensity of the high intensity magnetic separation is 0.5T~1T.
Preferably, the method for carrying out Cyanide Leaching processing for weak magnetic mineral is by the concentrated tune of the weak magnetic mineral
It starches to 35%~40% pulp density, and it is 11 to adjust slurry pH, adds in Cymag and carries out Cyanide Leaching, obtains leachate 2,
By the activated carbon adsorption of leachate 2, brown iron ore concentrate and gold loaded carbon are obtained.Preferably, concentration is sized mixing to 35% pulp density.
Preferably, the ore deposit that -0.043mm accounts for 80~90% is obtained after the strongly magnetic mineral or weak magnetic mineral being classified respectively
Material carries out Cyanide Leaching again, preferably accounts for 80~85%.It is further preferred that the strongly magnetic mineral or weak magnetic mineral are distinguished
After classification -0.043mm accounts for 81% mineral aggregate and carries out Cyanide Leaching again, under this ratio, not only obtain preferable leaching effect,
And the ore grinding cost generated is more reasonable.
Preferably, the adjustment slurry pH is using one or more in lime sodium hydroxide or sodium carbonate for 11
Mixture is adjusted；The amount for adding in Cymag is 2000~2500g/t to ore deposit.
Specifically, the method for the present invention includes the following steps：
S1. by raw ore (give ore deposit) through roughly grinding, being classified, the mineral aggregate that grinding particle size is accounted for for -0.074mm to 70% enters weak magnetic
Choosing, obtains strongly magnetic mineral and low intensity magnetic separation tailing；
S2. by the concentrated pulp density to 20%~30% (mass percent) of strongly magnetic mineral obtained by step S1, and
It is 11 to adjust slurry pH, and -0.043mm accounts for the direct Cyanide Leaching of mineral aggregate of 80~85% (integers as possible) after classification, must leach
Liquid 1 by the activated carbon adsorption of leachate 1, obtains magnetite concentrate and gold loaded carbon；Preferably, -0.043mm accounts for 81% after classification
The direct Cyanide Leaching of mineral aggregate.
Low intensity magnetic separation tailing obtained by step S1 under the magnetic field intensity of 0.5T~1T is subjected to high intensity magnetic separation ore dressing, obtains weak magnetic
Mineral and non magnetic ore, gained non magnetic ore are directly abandoned as thin mud tailing and are not involved in leaching process；Obtained by high intensity magnetic separation
Weak magnetic mineral size mixing by concentration to 35%~40% pulp density, slurry pH is adjusted to 11, then carries out cyanogen
Change and leach, obtain leachate 2, by the activated carbon adsorption of leachate 2, obtain brown iron ore concentrate and gold loaded carbon.
Waste liquid after absorption, which is crossed, accordingly obtains broken charcoal, return water and magnetite concentrate after safe screen, concentration, filtering.
Wherein, low intensity magnetic separation described in step S1 is carried out under the field strength of 0.15T~0.25T；Cyclone overflow may be used
Carry out low intensity magnetic separation.
Cyclone classification or spiral classifier classification may be used in classification described in step S1.
Weakly magnetic tailings described in step S2 carry out high intensity magnetic separation ore dressing under the magnetic field intensity of 0.5T~1T, obtain weak magnetic mineral
And non magnetic ore.
Preferably, granularity described in step S2 accounts for 81% for -0.043mm.
Preferably, it is to add in lime to be adjusted to adjust slurry pH to 11 described in step S2.
Preferably, the Cyanide Leaching processing of Cyanide Leaching described in step S2, Cymag addition are 2000~2500g/t
Give ore deposit (primary addition).
Preferably, the unqualified grade material after step S2 classifications can carry out ore grinding again and then be classified, and -0.043mm is accounted for
80~85% mineral aggregate can carry out Cyanide Leaching processing.
Beneficial effects of the present invention are as follows：
The present invention is creatively different for the magnetism of the different carriers mineral of gold and the carrier mineral of gold is grouped, grouping
It carries out targetedly Cyanide Leaching processing again afterwards, effectively increases the Gold leaching efficiency of Cyanide Leaching processing and the rate of recovery of gold；
The present invention is thrown in advance by the high intensity magnetic separation under reasonable field strength except not magnetic mineral such as thin mud and gangue, due to non magnetic ore
Iron-holder is only 13%, and is not gold and silver carrier iron mineral, therefore, this part thin mud is removed using the method removed directly is thrown,
So as to reduce the suction-operated of solubilized gold in its Cyanide Leaching to the later stage.Devise including throwing in advance to scientific system of the present invention
Except the overall technology processing step handled with specific aim Cyanide Leaching, while the rate of recovery for improving Gold leaching efficiency and gold,
More efficiently synthetical recovery iron mineral.The present invention is with obvious effects, production cost is low, can significantly improve the choosing of leaching gold efficiency
Ore deposit method is particularly suitable for the recycling of the larger golden iron oxide ore gold iron of clay content.
Using the method for the present invention, golden overall recovery is more than 91%, up to 93.5%, and silver-colored overall recovery is 36.91%
More than, up to 39.25%；Iron overall recovery is more than 50.25%, up to 52.26%；It is golden in iron extract mine producation and tailing
Grade compared to golden taste in raw ore, 93.18%~94.21% can be declined；Iron ore concentrate compares original with grade silver-colored in tailing
Silver-colored taste in ore deposit, can decline 35.06%~40.66%.
Description of the drawings
Fig. 1 is the process flow chart of the present invention.
Specific embodiment
It is further illustrated the present invention with reference to specific embodiment.The ore source that following embodiments illustrate is given for example only
Property explanation, it is impossible to be interpreted as limitation of the present invention.Unless stated otherwise, the raw material used in following embodiments is normal for this field
The raw material that market channel obtains is advised, unless stated otherwise, the method and apparatus used in following embodiments routinely makes for this field
Method and apparatus.
Process flow chart in the embodiment of the present invention is as shown in Figure 1.
Embodiment 1
The present embodiment is Yunnan iron gold oxide ore to ore deposit, and the enhanced leaching of gold is carried out using the method for following steps：
S1. raw ore, wherein -0.074mm grades account for 70%, is revolved after ball mill corase grinding and cyclone classification using FX75
It flows device and carries out graded operation, carry out carrying out low intensity magnetic separation in the case where magnetic field intensity is the field strength of 0.35T after cyclone overflow slagging-off, obtain
Strongly magnetic mineral and low intensity magnetic separation tailing；
S2. the strongly magnetic mineral that step S1 is obtained is concentrated again, and the return water of concentration returns to mill ore magnetic selection operation, after concentration
Ore pulp be classified so that -0.043mm grades account for 81% in ore pulp, and the particle of unqualified grade enters ball mill and regrinds.
It is 11 that lime adjustment slurry pH is added in the overflow of cyclone, and pulp density 25% adds in Cymag, and Cymag dosage is
2000 g tons give ore deposit (primary addition), carry out cyanidation-leaching process, obtain leachate 1, the activated carbon (the present embodiment of leachate 1
The concentration of activated carbon used is 16g/L) it is adsorbed to obtain gold loaded carbon, ore pulp then obtains magnetic after safe screen, concentration, filtering
Iron ore concentrate and broken charcoal.Cyanide Leaching operation is regrinded in return water return.
Magnetic field intensity into high intensity magnetic separation operation, is adjusted to 0.9T by the tailing of gained low intensity magnetic separation, obtain weak magnetic mineral and
Non magnetic ore.Non magnetic ore is directly entered Tailings Dam.It is 35% that weak magnetic mineral, which is then sized mixing by concentration to pulp density,
It is 11 to add in lime adjustment pH value, and Cymag dosage gives ore deposit (primary addition) for 2000 g tons, carries out Cyanide Leaching operation,
Leachate 2 is obtained, leachate 2 obtains carrying gold after adsorbing by activated carbon (concentration of activated carbon that the present embodiment uses is 16g/L)
Charcoal, the leachate after absorption obtain brown iron ore concentrate and broken charcoal after safe screen, thickening filtration.Return water returns to Cyanide Leaching operation.
Waste liquid after filtering can re-start concentration.
The process conditions that Cyanide Leaching described in the present embodiment is handled can refer to existing conventional techniques, preferably, described
The Cyanide Leaching processing of Cyanide Leaching, Cymag addition are 2000g/t to ore deposit, and stirring intensity is 1400 revs/min, cyaniding leaching
The time gone out is 36h.
It is 93.09% that the present embodiment, which has obtained golden overall recovery, and silver-colored overall recovery is 36.91%, and iron overall recovery is
51.30% index.Wherein grade golden in iron extract mine producation also falls to 0.14g/t by 2.07g/t, has dropped 93.24%；
Silver-colored grade is also fallen to the 24.55g/t in iron ore concentrate and tailing by the 38.92g/t in raw ore in iron ore concentrate, is had dropped
36.92%.
Embodiment 2
The present embodiment is Sichuan iron gold oxide ore to ore deposit, and the enhanced leaching of gold is carried out using the method for following steps：
S1. by raw ore after ball mill corase grinding and spiral classifier classification, wherein -0.074mm grades account for 75%；Using spiral shell
It revolves grader and carries out graded operation, carry out carrying out low intensity magnetic separation in the case where magnetic field intensity is the field strength of 0.3T after classifier overflow slagging-off,
Obtain strongly magnetic mineral and low intensity magnetic separation tailing；
S2. the strongly magnetic mineral that step S1 is obtained is concentrated again, and the return water of concentration returns to mill ore magnetic selection operation, after concentration
Ore pulp be classified so that -0.043mm grades account for 85% in ore pulp, and the particle of unqualified grade enters ball mill and regrinds.
It is 11 that lime adjustment slurry pH is added in the overflow of cyclone, and pulp density 30% adds in Cymag, and Cymag dosage is
2000 g tons give ore deposit (primary addition), carry out cyanidation-leaching process, obtain leachate 1, the activated carbon (the present embodiment of leachate 1
The concentration of activated carbon used is 16g/L) it is adsorbed to obtain gold loaded carbon, ore pulp then obtains magnetic after safe screen, concentration, filtering
Iron ore concentrate and broken charcoal.Cyanide Leaching operation is regrinded in return water return.
Magnetic field intensity into high intensity magnetic separation operation, is adjusted to 0.8T by the tailing of gained low intensity magnetic separation, obtain weak magnetic mineral and
Non magnetic ore.Non magnetic ore is directly entered Tailings Dam.It is 40% that weak magnetic mineral, which is then sized mixing by concentration to pulp density,
It is 11 to add in lime adjustment pH value, and Cymag dosage gives ore deposit (primary addition) for 2000 g tons, and obtained leachate 2 passes through
Gold loaded carbon is obtained after activated carbon (concentration of activated carbon that the present embodiment uses is 16g/L) absorption, the leachate after absorption is through safety
Brown iron ore concentrate and broken charcoal are obtained after sieve, thickening filtration.Return water returns to Cyanide Leaching operation.
Other conditions are with reference to embodiment 1.
It is 91.50% that the present embodiment, which has obtained golden overall recovery, and silver-colored overall recovery is 38.25%, and iron overall recovery is
52.26% index.Wherein grade golden in iron extract mine producation and tailing also falls to 0.15g/t by the 2.20g/t in raw ore,
Have dropped 93.18%；；Silver-colored grade is also fallen to by the 40.53g/t in raw ore in iron ore concentrate and tailing in iron ore concentrate
26.32g/t have dropped 35.06%.
Embodiment 3
The present embodiment is Guangxi iron gold oxide ore to ore deposit, and the enhanced leaching of gold is carried out using the method for following steps：
It S1. will be to ore deposit after ball mill corase grinding and spiral classifier classification, wherein -0.074mm grades account for 80%, using spiral shell
It revolves grader and carries out graded operation, carry out carrying out low intensity magnetic separation in the case where magnetic field intensity is the field strength of 0.25T after classifier overflow slagging-off,
Obtain strongly magnetic mineral and low intensity magnetic separation tailing；
S2. the strongly magnetic mineral that step S1 is obtained is concentrated, and the return water of concentration returns to mill ore magnetic selection operation, after concentration
Ore pulp is classified so that -0.043mm grades account for 85% in ore pulp, and the particle of unqualified grade enters ball mill and regrinds.It will rotation
It is 11 to flow addition lime adjustment slurry pH in the overflow of device, and pulp density 23% adds in Cymag, and Cymag dosage is
2500 g tons give ore deposit (primary addition), carry out cyanidation-leaching process, obtain leachate 1, the activated carbon (the present embodiment of leachate 1
The concentration of activated carbon used is 16g/L) it is adsorbed to obtain gold loaded carbon, ore pulp then obtains magnetic after safe screen, concentration, filtering
Iron ore concentrate and broken charcoal.Cyanide Leaching operation is regrinded in return water return.
Magnetic field intensity into high intensity magnetic separation operation, is adjusted to 0.8T by the tailing of gained low intensity magnetic separation, obtain weak magnetic mineral and
Non magnetic ore.Non magnetic ore is directly entered Tailings Dam.It is 30% that weak magnetic mineral, which is sized mixing by concentration to pulp density, into
So that -0.043mm grades account for 85% in ore pulp, it is 11 to add in lime adjustment pH value for row classification, and it is 11 to add in lime adjustment pH value,
Cymag dosage gives ore deposit (primary addition) for 2500 g tons, and by activated carbon, (the present embodiment uses obtained leachate 2
Concentration of activated carbon is 16g/L) absorption after obtain gold loaded carbon, the leachate after absorption obtains brown iron after safe screen, thickening filtration
Concentrate and broken charcoal.Return water returns to Cyanide Leaching operation.
Other treatment conditions are the same as embodiment 1.
It is 93.50% that the present embodiment, which has obtained golden overall recovery, and silver-colored overall recovery is 39.25%, and iron overall recovery is
50.25% index.Wherein grade golden in iron extract mine producation and tailing also falls to 0.11g/t by the 1.90g/t in raw ore,
Have dropped 94.21%；Silver-colored grade is also fallen to by the 36.37g/t in raw ore in iron ore concentrate and tailing in iron ore concentrate
21.58g/t have dropped 40.66%.
Claims (13)
1. a kind of throw including high intensity magnetic separation in advance except the method for the reinforcing technology for gold extraction of thin mud in golden iron oxide ore, which is characterized in that
It is that low intensity magnetic separation enrichment carrier mineral magnetic iron ore will be first passed through to ore deposit, strongly magnetic mineral and low intensity magnetic separation tailing is obtained, by gained weak magnetic
Tailing is selected to carry out high intensity magnetic separation ore dressing, obtains weak magnetic mineral and non magnetic ore；It throws except non magnetic ore；Then it is directed to ferromagnetism
Mineral and weak magnetic mineral carry out Cyanide Leaching processing respectively, respectively obtain magnetite concentrate, brown iron ore concentrate and gold loaded carbon；
Described to ore deposit is through roughly grinding, being classified, and the mineral aggregate that grinding particle size accounts for 60~80% for -0.074mm enters low intensity magnetic separation；It is described
The magnetic field intensity of low intensity magnetic separation is 0.15T~0.25T；The magnetic field intensity of the high intensity magnetic separation is 0.5T~1T.
2. include high intensity magnetic separation according to claim 1 to be thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that described to ore deposit is to enter low intensity magnetic separation after grinding particle size is accounted for 70% mineral aggregate for -0.074mm.
3. include high intensity magnetic separation according to claim 1 to be thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that the method for carrying out Cyanide Leaching processing for strongly magnetic mineral is by the concentrated tune of the strongly magnetic mineral
It starches to 20%~30% pulp density, and it is 11 to adjust slurry pH, adds in Cymag and carries out Cyanide Leaching, obtains leachate 1,
By the activated carbon adsorption of leachate 1, magnetite concentrate and gold loaded carbon are obtained.
4. include high intensity magnetic separation according to claim 1 to be thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that the method for carrying out Cyanide Leaching processing for weak magnetic mineral is by the concentrated tune of the weak magnetic mineral
It starches to 35%~40% pulp density, and it is 11 to adjust slurry pH, adds in Cymag and carries out Cyanide Leaching, obtains leachate 2,
By the activated carbon adsorption of leachate 2, brown iron ore concentrate and gold loaded carbon are obtained.
5. include high intensity magnetic separation according to claim 3 or 4 to be thrown in advance except the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that -0.043mm is obtained after being classified the strongly magnetic mineral or weak magnetic mineral respectively and accounts for 80~85%
Mineral aggregate carries out Cyanide Leaching again.
6. include high intensity magnetic separation according to claim 5 to be thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that be that the mineral aggregate that -0.043mm accounts for 81% is obtained after being classified the strongly magnetic mineral or weak magnetic mineral respectively
Cyanide Leaching is carried out again.
7. include high intensity magnetic separation according to claim 3 or 4 to be thrown in advance except the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that the adjustment slurry pH is adjusted for 11 using lime；The amount for adding in Cymag is 2000
~2500g/t is to ore deposit.
8. include high intensity magnetic separation according to claim 1,2,3,4 or 6 to be thrown in advance except the reinforcing leaching gold of thin mud in golden iron oxide ore
The method of technology, which is characterized in that include the following steps：
S1. by raw ore through roughly grinding, being classified, grinding particle size is accounted for into 70% mineral aggregate for -0.074mm and enters low intensity magnetic separation, obtains strong magnetic
Property mineral and low intensity magnetic separation tailing；
S2. by strongly magnetic mineral obtained by step S1 it is concentrated to 20%~30% pulp density, then make after classification is handled-
0.043mm accounts for 80~85%, and adjustment slurry pH is 11, and direct Cyanide Leaching obtains leachate 1, and leachate 1 is inhaled with activated carbon
It is attached, obtain magnetite concentrate and gold loaded carbon；
Low intensity magnetic separation tailing obtained by step S1 under the magnetic field intensity of 0.5T~1T is subjected to high intensity magnetic separation ore dressing, obtains weak magnetic mineral
And non magnetic ore, gained non magnetic ore are directly abandoned as thin mud tailing and are not involved in leaching process；It is weak obtained by high intensity magnetic separation
Magnetic mineral is concentrated to size mixing to 35~40% pulp density, then -0.043mm is made to account for 80~85% after classification is handled, will
Slurry pH is adjusted to 11, is then carried out Cyanide Leaching, is obtained leachate 2, by the activated carbon adsorption of leachate 2, obtains brown iron essence
Ore deposit and gold loaded carbon.
9. include high intensity magnetic separation according to claim 8 to be thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that it further includes the unqualified grade material after step S2 is classified and carries out ore grinding again and then classification processing ,-
The step of mineral aggregate that 0.043mm accounts for 80~85% carries out Cyanide Leaching processing.
10. include high intensity magnetic separation according to claim 5 to be thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that include the following steps：
S1. by raw ore through roughly grinding, being classified, grinding particle size is accounted for into 70% mineral aggregate for -0.074mm and enters low intensity magnetic separation, obtains strong magnetic
Property mineral and low intensity magnetic separation tailing；
S2. by strongly magnetic mineral obtained by step S1 it is concentrated to 20%~30% pulp density, then make after classification is handled-
0.043mm accounts for 80~85%, and adjustment slurry pH is 11, and direct Cyanide Leaching obtains leachate 1, and leachate 1 is inhaled with activated carbon
It is attached, obtain magnetite concentrate and gold loaded carbon；
Low intensity magnetic separation tailing obtained by step S1 under the magnetic field intensity of 0.5T~1T is subjected to high intensity magnetic separation ore dressing, obtains weak magnetic mineral
And non magnetic ore, gained non magnetic ore are directly abandoned as thin mud tailing and are not involved in leaching process；It is weak obtained by high intensity magnetic separation
Magnetic mineral is concentrated to size mixing to 35~40% pulp density, then -0.043mm is made to account for 80~85% after classification is handled, will
Slurry pH is adjusted to 11, is then carried out Cyanide Leaching, is obtained leachate 2, by the activated carbon adsorption of leachate 2, obtains brown iron essence
Ore deposit and gold loaded carbon.
11. include high intensity magnetic separation according to claim 10 to be thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that it further includes the unqualified grade material after step S2 is classified and carries out ore grinding again and then classification processing ,-
The step of mineral aggregate that 0.043mm accounts for 80~85% carries out Cyanide Leaching processing.
12. include high intensity magnetic separation according to claim 7 to be thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that include the following steps：
S1. by raw ore through roughly grinding, being classified, grinding particle size is accounted for into 70% mineral aggregate for -0.074mm and enters low intensity magnetic separation, obtains strong magnetic
Property mineral and low intensity magnetic separation tailing；
S2. by strongly magnetic mineral obtained by step S1 it is concentrated to 20%~30% pulp density, then make after classification is handled-
0.043mm accounts for 80~85%, and adjustment slurry pH is 11, and direct Cyanide Leaching obtains leachate 1, and leachate 1 is inhaled with activated carbon
It is attached, obtain magnetite concentrate and gold loaded carbon；
Low intensity magnetic separation tailing obtained by step S1 under the magnetic field intensity of 0.5T~1T is subjected to high intensity magnetic separation ore dressing, obtains weak magnetic mineral
And non magnetic ore, gained non magnetic ore are directly abandoned as thin mud tailing and are not involved in leaching process；It is weak obtained by high intensity magnetic separation
Magnetic mineral is concentrated to size mixing to 35~40% pulp density, then -0.043mm is made to account for 80~85% after classification is handled, will
Slurry pH is adjusted to 11, is then carried out Cyanide Leaching, is obtained leachate 2, by the activated carbon adsorption of leachate 2, obtains brown iron essence
Ore deposit and gold loaded carbon.
13. include high intensity magnetic separation according to claim 12 to be thrown in advance except the side of the reinforcing technology for gold extraction of thin mud in golden iron oxide ore
Method, which is characterized in that it further includes the unqualified grade material after step S2 is classified and carries out ore grinding again and then classification processing ,-
The step of mineral aggregate that 0.043mm accounts for 80~85% carries out Cyanide Leaching processing.
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| GB2219474B (en) * | 1988-05-06 | 1992-08-19 | Interox Chemicals Ltd | Gold leaching |
| CN1593775A (en) * | 2004-07-12 | 2005-03-16 | 洋浦金海铝业工贸有限公司 | Method for magnetic separating of aluminum and iron in high iron bauxite |
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