CN105907985B - Gold and the method purified are extracted in a kind of gold mine - Google Patents
Gold and the method purified are extracted in a kind of gold mine Download PDFInfo
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- CN105907985B CN105907985B CN201610496798.2A CN201610496798A CN105907985B CN 105907985 B CN105907985 B CN 105907985B CN 201610496798 A CN201610496798 A CN 201610496798A CN 105907985 B CN105907985 B CN 105907985B
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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
- C22B11/04—Obtaining noble metals by wet processes
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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
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/42—Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
- C22B3/46—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to golden purification technique field, gold and the method purified are extracted in especially a kind of gold mine, by the way that gold mine powder is extracted after gold using hydrometallurgy, again by the thick bronze of acquisition and liquid medicine immixture, so that the silver-colored composition in gold mine powder obtains substantial amounts of reduction, so that substantial amounts of silver dissolving is acted in filtrate by liquid medicine, and the component residues such as dissolved gold, platinum are made it difficult in filter cake；So that the separation that silver element and gold element, platinum element are slightly walked, reduces the usage amount of follow-up chloroazotic acid, reduce cost, but also can reduce it is follow-up obtain gas generated when driving processing out of to the nitric acid in chloroazotic acid, reduce environmental pollution.
Description
Technical field
The present invention relates to golden purification technique field, gold and the method purified are extracted in especially a kind of gold mine.
Background technology
Gold as a kind of noble metal, its be by being exploited to gold mine after, extracted, purify the product obtained；
Its exploitation difficulty is big, cost is high.Gold, with good physical characteristic, fusing point is high, at 1064.43 DEG C so that gold is difficult to melt
Change, and gold density is big, and toughness and ductility are preferable.
In the prior art, the processing method for gold and silver material is mainly melt chloridising and wet separation gold and silver method；Its
Middle melt chloridising is during the processing, it is necessary to by the way of electrolysis so that the cycle of golden production is longer, cost compared with
It is high；Wet separation gold and silver method, it uses chloroazotic acid leaching process mostly, and restores with oxalic acid cake of gold, then by after its founding, obtains
Proof gold is obtained, the method needs substantial amounts of chloroazotic acid to be handled, and using oxalic acid reduction and heat treatment so that the substantial amounts of gas of generation
Bubble, causes environmental pollution, energy consumption is big.
In consideration of it, there is researcher to be directed to the defect of prior art, following improved thinking is proposed：
Handled using chloroazotic acid so that gold is dissolved in chloroazotic acid, and silver is not dissolved chloroazotic acid, realize the separation to gold, silver, tool
Body is to mix thick bronze with chloroazotic acid, 80 DEG C of immersion dissolvings, after cooling 1h, filtering；And nitric acid is caught up with using hydrochloric acid is added to filtrate,
So that filtrate surface is added without stopping after brown cigarette so that nitric acid is vapored away in the form of nitric oxide gas, cause harmful gas
Body volatile quantity is larger so that environment is affected, and in processing procedure, it is difficult to control, cause processing cost higher.
Also, in the prior art, extracted, in addition to the technological means of purification processes for gold except above-mentioned, also cyaniding
Method, chloridising, pyrogenic process concentration method etc..But still it is not met by the demand extracted, purified to gold so that need constantly to gold
Extract, purification technique make improvements, with reach realize low cost, low energy consumption, low consumption, high-quality extraction, purifying gold mesh
's.
The content of the invention
In order to solve above-mentioned technical problem present in prior art, the present invention, which is provided, to be extracted gold and purifies in a kind of gold mine
Method.
It is achieved particular by following technical scheme：
Gold and the method purified are extracted in a kind of gold mine, is comprised the following steps：
(1) by gold mine grind into powder, and gold will be extracted using hydrometallurgical processes, and will obtain thick bronze；
(2) it is 1 according to mass ratio by thick bronze and liquid medicine:2-3 is well mixed, and is heated to 80-90 DEG C, handles 20-30min
Afterwards, filter, obtain filtrate and filter cake；
(3) filtrate is sent into heavy silver processing, chloroazotic acid is added into filter cake, the addition of chloroazotic acid is 3-4 times of filter cake quality,
And it is heated to 80-90 DEG C, stirring is cooled to after normal temperature, is filtered, is obtained filtrate a and filter cake a；
(4) by filtrate a with distilled water according to mixing in equal volume, be passed through chlorine, intake is to be with the mol ratio of distilled water
1:1, saturated oxalic acid solution is added after it reacts 1-3h, then under normal temperature condition, addition is the 120- of filtrate a mass
150%, and observe the color of solution and gradually become light yellow by brownish red, and it is light yellow do not occur color change after, it is complete
Into reaction, basic anionic resin is added, after mixing thoroughly, standing sedimentation, separation of solid and liquid obtains cake of gold, and cake of gold is used into 80-90
DEG C hot water clean 1-3 times repeatedly after, then use concentration for 5-15% dust technology wash 1-2 times, then use again temperature for
80-90 DEG C of hot water is cleaned 2-3 times, is placed in melting at 1200-1300 DEG C, casting obtains gold ingot；
(5) by the cleaning fluid in step (4), cleaning solution centralized recovery, and obtain separating liquid with separation of solid and liquid and mix, mixed
Close liquid；Oxalic acid solution is added into mixed liquor, oxalic acid addition is the 120-150% of mixed liquor quality, stands 2-5h, filtering
Separation, obtains and is mixed in filtrate b and filter cake b, filter cake b return to step (3) with filter cake；Zinc powder is added in filtrate b, after displacement reaction,
Filtering, is washed, and drying obtains platinum concentrate；Remaining filtrate sends to electrolytic zinc, you can.
Described liquid medicine, by composition a and composition b, individually storage is constituted；Wherein composition a is the dense sulphur that concentration is 90-98%
Acid, composition b is the mixture of perchloric acid and basic anionic resin, and mixing ratio is 3 by quality ratio:0.1-0.5；The liquid medicine has
It according to composition a and composition b mol ratio is 1 that body is during use:2 use, and composition b molar ratio computing is with high chlorine
Acid meter；When in use, it is to be added by the concentrated sulfuric acid and the first immixture 5-10min of thick bronze, then by perchloric acid and alkali anion,
Stir, processing to the processing time to thick bronze reaches 20-30min, you can.
Described heavy silver processing is to be passed through addition hydrochloric acid, untill precipitation is no longer generated.
Described basic anionic resin solution is to contain-NR3OH molar concentration is 3-4mol/l solution, wherein R
For hydrocarbon group.
Described-NR3OH is-N (CH3)3OH。
Chloroazotic acid in the invention is mixed using nitric acid with hydrochloric acid, and its mixing ratio is 1：3-4 mass ratio.
The invention can be after basic anionic resin is added, its obtain containing basic anionic resin and
The solution of part metals ion uses molar concentration for 2.1mol/l thiourea solution dissection process, then is used citric acid three
Sodium reduction processing.
Compared with prior art, technique effect of the invention is embodied in：
By the way that gold mine powder is extracted after gold using hydrometallurgy, then by the thick bronze of acquisition and liquid medicine immixture so that
Silver-colored composition in gold mine powder obtains substantial amounts of reduction so that substantial amounts of silver dissolving is acted in filtrate by liquid medicine, and is made it difficult to
The component residues such as dissolved gold, platinum are in filter cake；So that the separation that silver element is slightly walked with gold element, platinum element, reduction
The usage amount of follow-up chloroazotic acid, reduces cost, but also can reduce and follow-up obtain gas production when driving processing out of to the nitric acid in chloroazotic acid
Raw amount, reduces environmental pollution.
The present invention is, by the way that thick bronze is handled using liquid medicine, and to be used as composition a, high chlorine using the concentrated sulfuric acid to liquid medicine
Acid individually deposits composition with basic anionic resin as composition b, and by composition a, composition b, and combines in use
Proportion design and the mode used so that the silver-colored composition in thick bronze is acted on the concentrated sulfuric acid in a heated condition, generates sulfuric acid
Silver, then with composition b addition so that perchloric acid dissolves silver sulfate micro-soluble material, and acting in basic anionic resin
To enrichment so that the silver element in thick bronze obtains separating in the solution, then is filtered, point of silver element and thick bronze is realized
From reducing the consumption of follow-up chloroazotic acid processing, reduce cost.
The present invention is combined to be handled in the follow-up filter cake using to separating silver using chloroazotic acid so that effect of the chloroazotic acid to silver
Measure less, the usage amount for reducing chloroazotic acid of high degree；And drive nitric acid out of using chlorine is passed through in conjunction with follow-up so that
Chlorauride can be formed quickly, and not acting on redox reaction of the complete composition after chlorine is passed through in thick bronze
When electronics drive under, promote the dissolving of the composition such as elemental gold, platinum in thick bronze, and generate chlorauride so that at thick bronze
The yield of reason is improved, and causes the purity of gold ingot to reach more than 99.99%, realizes the mesh purified to thick bronze
, and bronze loss late is relatively low, and cost is relatively low.
The present invention adds basic anionic resin in handling process so that the element such as gold and platinum is attracted to alkaline the moon
Ion exchange resin solution, reaches the state of enrichment so that golden concentration is increasing, reduces the difficulty to gold purification.
Embodiment
Limited with reference to specific embodiment technical scheme is further, but claimed
Scope is not only limited to made description.
In the examples below, it can also be after basic anionic resin is added, its acquisition contains alkali anion
The solution of resin and part metals ion uses molar concentration for 2.1mol/l thiourea solution dissection process, then is used
Trisodium citrate reduction treatment.
Embodiment 1
Gold and the method purified are extracted in a kind of gold mine, is comprised the following steps：
(1) by gold mine grind into powder, and gold will be extracted using hydrometallurgical processes, and will obtain thick bronze；
(2) it is 1 according to mass ratio by thick bronze and liquid medicine:2 are well mixed, and are heated to after 80 DEG C, processing 20min, filtering,
Obtain filtrate and filter cake；
(3) filtrate is sent into heavy silver processing, chloroazotic acid is added into filter cake, the addition of chloroazotic acid is 3 times of filter cake quality, and
80 DEG C are heated to, stirring is cooled to after normal temperature, is filtered, is obtained filtrate a and filter cake a；
(4) by filtrate a with distilled water according to mixing in equal volume, be passed through chlorine, intake is to be with the mol ratio of distilled water
1:1, saturated oxalic acid solution is added after it reacts 1h, then under normal temperature condition, addition is the 120% of filtrate a mass, and is seen
The color for examining solution gradually becomes light yellow by brownish red, and it is light yellow do not occur color change after, complete reaction, add
Basic anionic resin, after mixing thoroughly, standing sedimentation, separation of solid and liquid obtains cake of gold, and cake of gold is repeatedly clear using 80 DEG C of hot water
Wash after 1 time, then use concentration to be washed 1 time for 5% dust technology, then use temperature to be cleaned 2 times for 80 DEG C of hot water again, juxtaposition
In being melted at 1200 DEG C, casting obtains gold ingot；
(5) by the cleaning fluid in step (4), cleaning solution centralized recovery, and obtain separating liquid with separation of solid and liquid and mix, mixed
Close liquid；Oxalic acid solution is added into mixed liquor, oxalic acid addition is the 120% of mixed liquor quality, stands 2h, is separated by filtration,
Obtain and mixed in filtrate b and filter cake b, filter cake b return to step (3) with filter cake；Zinc powder is added in filtrate b, after displacement reaction, filtering,
Washing, drying, obtains platinum concentrate；Remaining filtrate sends to electrolytic zinc, you can.
Described liquid medicine, by composition a and composition b, individually storage is constituted；Wherein composition a is the concentrated sulfuric acid that concentration is 90%,
Composition b is the mixture of perchloric acid and basic anionic resin, and mixing ratio is 3 by quality ratio:0.1；The liquid medicine specifically makes
It according to composition a and composition b mol ratio is 1 during to be:2 use, and composition b molar ratio computing is in terms of perchloric acid；
When in use, it is to be added by the concentrated sulfuric acid and the first immixture 5min of thick bronze, then by perchloric acid and alkali anion, stirring is equal
Even, processing to the processing time to thick bronze reaches 20min, you can.
Embodiment 2
Gold and the method purified are extracted in a kind of gold mine, is comprised the following steps：
(1) by gold mine grind into powder, and gold will be extracted using hydrometallurgical processes, and will obtain thick bronze；
(2) it is 1 according to mass ratio by thick bronze and liquid medicine:3 are well mixed, and are heated to after 90 DEG C, processing 30min, filtering,
Obtain filtrate and filter cake；
(3) filtrate is sent into heavy silver processing, chloroazotic acid is added into filter cake, the addition of chloroazotic acid is 4 times of filter cake quality, and
90 DEG C are heated to, stirring is cooled to after normal temperature, is filtered, is obtained filtrate a and filter cake a；
(4) by filtrate a with distilled water according to mixing in equal volume, be passed through chlorine, intake is to be with the mol ratio of distilled water
1:1, saturated oxalic acid solution is added after it reacts 3h, then under normal temperature condition, addition is the 150% of filtrate a mass, and is seen
The color for examining solution gradually becomes light yellow by brownish red, and it is light yellow do not occur color change after, complete reaction, add
Basic anionic resin, after mixing thoroughly, standing sedimentation, separation of solid and liquid obtains cake of gold, and cake of gold is repeatedly clear using 90 DEG C of hot water
Wash after 3 times, then use concentration to be washed 2 times for 15% dust technology, then use temperature to be cleaned 3 times for 90 DEG C of hot water again, and
It is placed at 1300 DEG C and melts, casting obtains gold ingot；
(5) by the cleaning fluid in step (4), cleaning solution centralized recovery, and obtain separating liquid with separation of solid and liquid and mix, mixed
Close liquid；Oxalic acid solution is added into mixed liquor, oxalic acid addition is the 150% of mixed liquor quality, stands 5h, is separated by filtration,
Obtain and mixed in filtrate b and filter cake b, filter cake b return to step (3) with filter cake；Zinc powder is added in filtrate b, after displacement reaction, filtering,
Washing, drying, obtains platinum concentrate；Remaining filtrate sends to electrolytic zinc, you can.
Described liquid medicine, by composition a and composition b, individually storage is constituted；Wherein composition a is the concentrated sulfuric acid that concentration is 98%,
Composition b is the mixture of perchloric acid and basic anionic resin, and mixing ratio is 3 by quality ratio:0.5；The liquid medicine specifically makes
It according to composition a and composition b mol ratio is 1 during to be:2 use, and composition b molar ratio computing is in terms of perchloric acid；
When in use, it is to be added by the concentrated sulfuric acid and the first immixture 10min of thick bronze, then by perchloric acid and alkali anion, stirring is equal
Even, processing to the processing time to thick bronze reaches 30min, you can.
Described heavy silver processing is to be passed through addition hydrochloric acid, untill precipitation is no longer generated.
Embodiment 3
Gold and the method purified are extracted in a kind of gold mine, is comprised the following steps：
(1) by gold mine grind into powder, and gold will be extracted using hydrometallurgical processes, and will obtain thick bronze；
(2) it is 1 according to mass ratio by thick bronze and liquid medicine:2.5 are well mixed, and are heated to after 85 DEG C, processing 25min, mistake
Filter, obtains filtrate and filter cake；
(3) filtrate is sent into heavy silver processing, chloroazotic acid is added into filter cake, the addition of chloroazotic acid is 3.5 times of filter cake quality,
And it is heated to 85 DEG C, stirring is cooled to after normal temperature, is filtered, is obtained filtrate a and filter cake a；
(4) by filtrate a with distilled water according to mixing in equal volume, be passed through chlorine, intake is to be with the mol ratio of distilled water
1:1, saturated oxalic acid solution is added after it reacts 2h, then under normal temperature condition, addition is the 140% of filtrate a mass, and is seen
The color for examining solution gradually becomes light yellow by brownish red, and it is light yellow do not occur color change after, complete reaction, add
Basic anionic resin, after mixing thoroughly, standing sedimentation, separation of solid and liquid obtains cake of gold, and cake of gold is repeatedly clear using 85 DEG C of hot water
Wash after 2 times, then use concentration to be washed 1 time for 10% dust technology, then use temperature to be cleaned 3 times for 85 DEG C of hot water again, and
It is placed at 1250 DEG C and melts, casting obtains gold ingot；
(5) by the cleaning fluid in step (4), cleaning solution centralized recovery, and obtain separating liquid with separation of solid and liquid and mix, mixed
Close liquid；Oxalic acid solution is added into mixed liquor, oxalic acid addition is the 130% of mixed liquor quality, stands 4h, is separated by filtration,
Obtain and mixed in filtrate b and filter cake b, filter cake b return to step (3) with filter cake；Zinc powder is added in filtrate b, after displacement reaction, filtering,
Washing, drying, obtains platinum concentrate；Remaining filtrate sends to electrolytic zinc, you can.
Described liquid medicine, by composition a and composition b, individually storage is constituted；Wherein composition a is the concentrated sulfuric acid that concentration is 95%,
Composition b is the mixture of perchloric acid and basic anionic resin, and mixing ratio is 3 by quality ratio:0.4；The liquid medicine specifically makes
It according to composition a and composition b mol ratio is 1 during to be:2 use, and composition b molar ratio computing is in terms of perchloric acid；
When in use, it is to be added by the concentrated sulfuric acid and the first immixture 8min of thick bronze, then by perchloric acid and alkali anion, stirring is equal
Even, processing to the processing time to thick bronze reaches 25min, you can.
Described heavy silver processing is to be passed through addition hydrochloric acid, untill precipitation is no longer generated.
Described basic anionic resin solution is to contain-NR3OH molar concentration is 3mol/l solution, and wherein R is
Hydrocarbon group.
Embodiment 4
Gold and the method purified are extracted in a kind of gold mine, is comprised the following steps：
(1) by gold mine grind into powder, and gold will be extracted using hydrometallurgical processes, and will obtain thick bronze；
(2) it is 1 according to mass ratio by thick bronze and liquid medicine:3 are well mixed, and are heated to after 80 DEG C, processing 30min, filtering,
Obtain filtrate and filter cake；
(3) filtrate is sent into heavy silver processing, chloroazotic acid is added into filter cake, the addition of chloroazotic acid is 3 times of filter cake quality, and
90 DEG C are heated to, stirring is cooled to after normal temperature, is filtered, is obtained filtrate a and filter cake a；
(4) by filtrate a with distilled water according to mixing in equal volume, be passed through chlorine, intake is to be with the mol ratio of distilled water
1:1, saturated oxalic acid solution is added after it reacts 1h, then under normal temperature condition, addition is the 150% of filtrate a mass, and is seen
The color for examining solution gradually becomes light yellow by brownish red, and it is light yellow do not occur color change after, complete reaction, add
Basic anionic resin, after mixing thoroughly, standing sedimentation, separation of solid and liquid obtains cake of gold, and cake of gold is repeatedly clear using 80 DEG C of hot water
Wash after 3 times, then use concentration to be washed 2 times for 5% dust technology, then use temperature to be cleaned 3 times for 80 DEG C of hot water again, juxtaposition
In being melted at 1200 DEG C, casting obtains gold ingot；
(5) by the cleaning fluid in step (4), cleaning solution centralized recovery, and obtain separating liquid with separation of solid and liquid and mix, mixed
Close liquid；Oxalic acid solution is added into mixed liquor, oxalic acid addition is the 150% of mixed liquor quality, stands 2h, is separated by filtration,
Obtain and mixed in filtrate b and filter cake b, filter cake b return to step (3) with filter cake；Zinc powder is added in filtrate b, after displacement reaction, filtering,
Washing, drying, obtains platinum concentrate；Remaining filtrate sends to electrolytic zinc, you can.
Described liquid medicine, by composition a and composition b, individually storage is constituted；Wherein composition a is the concentrated sulfuric acid that concentration is 98%,
Composition b is the mixture of perchloric acid and basic anionic resin, and mixing ratio is 3 by quality ratio:0.1；The liquid medicine specifically makes
It according to composition a and composition b mol ratio is 1 during to be:2 use, and composition b molar ratio computing is in terms of perchloric acid；
When in use, it is to be added by the concentrated sulfuric acid and the first immixture 10min of thick bronze, then by perchloric acid and alkali anion, stirring is equal
Even, processing to the processing time to thick bronze reaches 30min, you can.
Described heavy silver processing is to be passed through addition hydrochloric acid, untill precipitation is no longer generated.
Described basic anionic resin solution is to contain-NR3OH molar concentration is 4mol/l solution, and wherein R is
Hydrocarbon group.
Described-NR3OH is-N (CH3)3OH。
Embodiment 5
Gold and the method purified are extracted in a kind of gold mine, is comprised the following steps：
(1) by gold mine grind into powder, and gold will be extracted using hydrometallurgical processes, and will obtain thick bronze；
(2) it is 1 according to mass ratio by thick bronze and liquid medicine:2 are well mixed, and are heated to after 90 DEG C, processing 20min, filtering,
Obtain filtrate and filter cake；
(3) filtrate is sent into heavy silver processing, chloroazotic acid is added into filter cake, the addition of chloroazotic acid is 4 times of filter cake quality, and
90 DEG C are heated to, stirring is cooled to after normal temperature, is filtered, is obtained filtrate a and filter cake a；
(4) by filtrate a with distilled water according to mixing in equal volume, be passed through chlorine, intake is to be with the mol ratio of distilled water
1:1, saturated oxalic acid solution is added after it reacts 3h, then under normal temperature condition, addition is the 120% of filtrate a mass, and is seen
The color for examining solution gradually becomes light yellow by brownish red, and it is light yellow do not occur color change after, complete reaction, add
Basic anionic resin, after mixing thoroughly, standing sedimentation, separation of solid and liquid obtains cake of gold, and cake of gold is repeatedly clear using 90 DEG C of hot water
Wash after 1 time, then use concentration to be washed 1 time for 15% dust technology, then use temperature to be cleaned 3 times for 90 DEG C of hot water again, and
It is placed at 1200 DEG C and melts, casting obtains gold ingot；
(5) by the cleaning fluid in step (4), cleaning solution centralized recovery, and obtain separating liquid with separation of solid and liquid and mix, mixed
Close liquid；Oxalic acid solution is added into mixed liquor, oxalic acid addition is the 150% of mixed liquor quality, stands 2h, is separated by filtration,
Obtain and mixed in filtrate b and filter cake b, filter cake b return to step (3) with filter cake；Zinc powder is added in filtrate b, after displacement reaction, filtering,
Washing, drying, obtains platinum concentrate；Remaining filtrate sends to electrolytic zinc, you can.
Described liquid medicine, by composition a and composition b, individually storage is constituted；Wherein composition a is the concentrated sulfuric acid that concentration is 90%,
Composition b is the mixture of perchloric acid and basic anionic resin, and mixing ratio is 3 by quality ratio:0.2；The liquid medicine specifically makes
It according to composition a and composition b mol ratio is 1 during to be:2 use, and composition b molar ratio computing is in terms of perchloric acid；
When in use, it is to be added by the concentrated sulfuric acid and the first immixture 10min of thick bronze, then by perchloric acid and alkali anion, stirring is equal
Even, processing to the processing time to thick bronze reaches 20min, you can.
Described heavy silver processing is to be passed through addition hydrochloric acid, untill precipitation is no longer generated.
Described basic anionic resin solution is to contain-NR3OH molar concentration is 3.5mol/l solution, wherein R
For hydrocarbon group.
Described-NR3OH is-N (CH3)3OH。
Claims (4)
1. gold and the method purified are extracted in a kind of gold mine, it is characterised in that comprise the following steps：
（1）By gold mine grind into powder, and gold will be extracted using hydrometallurgical processes, and obtain thick bronze；
（2）According to mass ratio it is 1 by thick bronze and liquid medicine:2-3 is well mixed, and is heated to after 80-90 DEG C, processing 20-30min,
Filtering, obtains filtrate and filter cake；
（3）Filtrate is sent into heavy silver processing, chloroazotic acid is added into filter cake, the addition of chloroazotic acid is 3-4 times of filter cake quality, and is added
Heat is to 80-90 DEG C, and stirring is cooled to after normal temperature, is filtered, is obtained filtrate a and filter cake a；
（4）By filtrate a with distilled water according to mixing in equal volume, chlorine is passed through, intake is 1 for the mol ratio with distilled water:1,
Saturated oxalic acid solution is added after it reacts 1-3h, then under normal temperature condition, addition is the 120-150% of filtrate a mass, and
Observation solution color gradually become light yellow by brownish red, and it is light yellow do not occur color change after, complete reaction, plus
Enter basic anionic resin, after mixing thoroughly, standing sedimentation, separation of solid and liquid obtains cake of gold, cake of gold is used to 80-90 DEG C of hot water
After cleaning 1-3 times repeatedly, then use concentration to be washed 1-2 times for 5-15% dust technology, temperature is then used again for 80-90 DEG C
Hot water is cleaned 2-3 times, is placed in melting at 1200-1300 DEG C, casting obtains gold ingot；
（5）By step（4）In cleaning fluid, cleaning solution centralized recovery, and obtain separating liquid with separation of solid and liquid and mix, mixed
Liquid；Oxalic acid solution is added into mixed liquor, oxalic acid addition is the 120-150% of mixed liquor quality, stands 2-5h, filtering point
From obtaining filtrate b and filter cake b, filter cake b return to step（3）In mixed with filter cake；Zinc powder is added in filtrate b, after displacement reaction, mistake
Filter, is washed, and drying obtains platinum concentrate；Remaining filtrate sends to electrolytic zinc, you can；Described liquid medicine, it is mono- by composition a and composition b
Solely storage is constituted；Wherein composition a is the concentrated sulfuric acid that concentration is 90-98%, and composition b is the mixed of perchloric acid and basic anionic resin
Compound, mixing ratio is 3 by quality ratio:0.1-0.5；The specific liquid medicine is according to composition a and composition b during use
Mol ratio is 1:2 use, and composition b molar ratio computing is in terms of perchloric acid；When in use, it is first to mix the concentrated sulfuric acid with thick bronze
Cooperation 5-10min, then perchloric acid and alkali anion are added, stir, processing to the processing time to thick bronze reaches
To 20-30min, you can.
2. gold and the method purified are extracted in gold mine as claimed in claim 1, it is characterised in that described heavy silver processing is logical
Enter to add hydrochloric acid, untill precipitation is no longer generated.
3. gold and the method purified are extracted in gold mine as claimed in claim 1, it is characterised in that described alkali anion tree
Lipoprotein solution is to contain-NR3OH molar concentration is 3-4mol/l solution, and wherein R is hydrocarbon group.
4. gold and the method purified are extracted in gold mine as claimed in claim 1, it is characterised in that described-NR 3OH is-N
(CH3)3OH。
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| CN108588412B (en) * | 2018-01-10 | 2019-10-08 | 中宝正信金银珠宝首饰检测有限公司 | A kind of wet purification process of gold |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1362532A (en) * | 2001-01-08 | 2002-08-07 | 冶金工业部长春黄金研究院 | Amminochloride process of purifying gold |
| CN101328541A (en) * | 2008-07-27 | 2008-12-24 | 郴州市金贵银业股份有限公司 | Gold wet purification process |
| CN101560608A (en) * | 2009-06-02 | 2009-10-21 | 长春黄金研究院 | Nitrogen-free wet-process refining method for gold-bearing materials |
| CN101985691A (en) * | 2010-12-01 | 2011-03-16 | 金川集团有限公司 | Method for preparing high-purity gold |
| CN102459659A (en) * | 2009-04-24 | 2012-05-16 | 贵金属回收私人有限公司 | Method for processing precious metal source materials |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1362532A (en) * | 2001-01-08 | 2002-08-07 | 冶金工业部长春黄金研究院 | Amminochloride process of purifying gold |
| CN101328541A (en) * | 2008-07-27 | 2008-12-24 | 郴州市金贵银业股份有限公司 | Gold wet purification process |
| CN102459659A (en) * | 2009-04-24 | 2012-05-16 | 贵金属回收私人有限公司 | Method for processing precious metal source materials |
| CN101560608A (en) * | 2009-06-02 | 2009-10-21 | 长春黄金研究院 | Nitrogen-free wet-process refining method for gold-bearing materials |
| CN101985691A (en) * | 2010-12-01 | 2011-03-16 | 金川集团有限公司 | Method for preparing high-purity gold |
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