CN101348864A - Leaching process of copper nickel coarse grain alloy - Google Patents
Leaching process of copper nickel coarse grain alloy Download PDFInfo
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- CN101348864A CN101348864A CNA2008101196269A CN200810119626A CN101348864A CN 101348864 A CN101348864 A CN 101348864A CN A2008101196269 A CNA2008101196269 A CN A2008101196269A CN 200810119626 A CN200810119626 A CN 200810119626A CN 101348864 A CN101348864 A CN 101348864A
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- copper
- leaching
- nickel
- coarse grain
- grain alloy
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- 238000002386 leaching Methods 0.000 title claims abstract description 70
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 66
- 239000000956 alloy Substances 0.000 title claims abstract description 66
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 27
- 230000008569 process Effects 0.000 title claims description 22
- 229910000570 Cupronickel Inorganic materials 0.000 title claims description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000010949 copper Substances 0.000 claims abstract description 49
- 229910052802 copper Inorganic materials 0.000 claims abstract description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 23
- 238000005516 engineering process Methods 0.000 claims abstract description 21
- 239000002893 slag Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 39
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 29
- 239000000284 extract Substances 0.000 claims description 16
- 239000010970 precious metal Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910017052 cobalt Inorganic materials 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 8
- 229910001431 copper ion Inorganic materials 0.000 claims description 7
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 7
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 238000004070 electrodeposition Methods 0.000 claims description 4
- 230000011218 segmentation Effects 0.000 claims description 2
- 241001074085 Scophthalmus aquosus Species 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 8
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 229910000510 noble metal Inorganic materials 0.000 abstract description 5
- 238000004073 vulcanization Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 16
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 238000005987 sulfurization reaction Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 241000080590 Niso Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004453 electron probe microanalysis Methods 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 4
- 229910017061 Fe Co Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000000543 intermediate Substances 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- LVIYYTJTOKJJOC-UHFFFAOYSA-N nickel phthalocyanine Chemical compound [Ni+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 LVIYYTJTOKJJOC-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910003406 FeNiCu Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052951 chalcopyrite Inorganic materials 0.000 description 1
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052954 pentlandite Inorganic materials 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- -1 platinum metals Chemical class 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a leaching technology for a nickel-copper coarse-grained alloy, which improves the leaching efficiency of copper and nickel in the alloy and the recovery rate of noble metals in leaching slag and avoids the environmental pollution brought by the vulcanization technology. The leaching technology for the nickel-copper coarse-grained alloy is characterized in that the leaching technology adopts the sectional leaching means and comprises primary leaching and secondary leaching which are performed in turn; and primary leaching slag is taken as a raw material for the secondary leaching, and secondary leaching slag is taken as a raw material for extracting the noble metals.
Description
Technical field
The present invention relates to the acidleach treatment process of cu-ni sulphide ore thing, belong to a kind of extract technology of the Technology, particularly a kind of copper nickel coarse grain alloy that the coarse grain alloy in the floating intermediates of high-sulfur mill is carried out wet processing.
Background technology
Cu-ni sulphide ore has the cu-ni sulphide ore of noble metals such as platinum, palladium, gold, rhodium, iridium, osmium, ruthenium for symbiosis, it is very important to adopt advanced and applicable technical process to reclaim these precious metals.Certain cu-ni sulphide ore in China, its platinum metals output accounts for more than 85% of national output.In existing precious metal recovery method, adopted alloy sulfiding smelting technology, this has not only caused the loss of precious metal, and has brought the serious environmental pollution.
The intermediates that cu-ni sulphide ore forms in the floating sepn process of high sulfonium mill are cupronickels, comprise coarse grain alloy and fine alloy.Precious metal floats nearly to have in the sepn process at high sulfonium mill and 90% is enriched in the intermediates cupronickel.The alloy sulfuration process carries out the high ice of sulfiding smelting output secondary nickel with this cupronickel as raw material exactly, carries out the floating output secondary alloy of secondary grinding again, and this secondary alloy is as the raw material that extracts precious metal.Production practice show, and are floating through such sulfuration and mill, precious metal only enrichment 5 times, and with a toll of more than 10%.Therefore, be necessary to adopt new technique means to improve the concentration ratio and the rate of recovery of precious metal.
In fact, not only metal loss is big, energy consumption is many but also produce the flue gas that SO2 is arranged in a large number for the sulfuration process of an alloy, is difficult for handling, and environmental pollution is serious, and labor condition is poor.As adopt then thorough decontamination source of wet processing, improve the Air quality and the Working environment of plant area.
Summary of the invention
The present invention is directed to the defective or the deficiency that exist in the prior art, a kind of extract technology of copper nickel coarse grain alloy is provided, thereby improve noble metal recovery rate in alloyed copper nickel leaching efficiency and the leached mud, and the environmental pollution of avoiding sulfuration process to bring.
Technical scheme of the present invention is as follows:
The extract technology of copper nickel coarse grain alloy is characterized in that: adopt segmentation to leach mode, comprise one section leaching and two sections leachings of carrying out successively, one section leached mud is as the raw material of two sections leachings, and two sections leached muds are as the raw material that is used to extract precious metal.
In described one section leaching, the two sections leachings, include logical oxygen step.
The leaching agent of described one section leaching comprises the sulfuric acid of sulfuric acid or copper ions.
The leaching agent of described two sections leachings comprises sulfuric acid, and with copper, nickel, iron and the cobalt leaching of metallographic phase in one section leached mud, two sections leach liquors of acquisition are copper-baths.
Described copper-bath is liquid after the electrodeposition decopper(ing) obtains electrolytic copper and decopper(ing).
Described copper-bath is the copper-bath of a kind of Cu: Ni 〉=2: 1.
Liquid turns back in the leaching agent of one section leaching behind the described decopper(ing).
The leaching agent of described one section leaching comprises the sulfuric acid of copper ions, and in one section leaching process, nickel, iron, cobalt are leached, and copper is gone into slag by cementation, obtains nickel sulfate solution.
Described nickel sulfate solution is a kind of Ni＞80g/l, Cu＜0.5g/l, H
2SO
4The nickel sulfate solution of＜10g/l.
Technique effect of the present invention is as follows:
Experiment showed, and implement method of the present invention, but can fully realize improving the leaching yield of extracts such as Ni, Fe, Co, Cu, also improve noble metal recovery rate in the leached mud, and avoided the environmental pollution that sulfuration process brought.
Embodiment
The leaching existing repeatedly experimental study and the industrial practice of copper nickel ice nickel, for example: adopt the sulfuric acid pressure leaching process to handle high ice nickel, the normal pressure and the pressurization of nickel ore concentrate, fine alloy mixture are leached or the like.What the present invention studied floats product to liking the high-sulfur mill: coarse grain alloy and fine alloy.Big for this granularity, take which kind of wet processing flow process than great, the difficult material that grinds, also do not have studying and testing of system, the applicant has proposed " using acid leaching process processing cupronickel instead to improve precious metal rate of recovery conductive suggestion about abolishing the alloy sulfuration " for this reason.According to this suggestion, coarse grain alloy and fine alloy carry out sulfuric acid respectively and leach; Fine alloy also will increase by one section pressurization and leaches because sulfur-bearing is higher; In the normal pressure leaching process, introduce cupric ion to strengthen leaching velocity; Leach by one section leachings, precipitation and two sections oxygen simultaneously, solution that a kind of nickeliferous height of output and impurity are few and the another kind of Cu that contains are high and nickeliferous low solution (Cu: Ni 〉=2: 1) is handled nickel and copper in the recovery raw material respectively.Particulate pressurization leached mud and two sections leached muds of coarse grain, because of the quantity of slag seldom, can directly send the precious metal workshop.
Coarse grain alloy and fine alloy are taked the mode that leaches respectively.The advantage of this mode is can obtain copper, nickel than higher solution.
1. coarse grain alloy extract technology process is described below:
It is two sections leach liquors of part particulate and two sections leach liquors of coarse grain liquid behind the decopper(ing) of output behind the electrodeposition that coarse grain alloy leaches used leaching agent for one section.In leaching process, nickel, iron, cobalt are leached, and copper is precipitated into slag, obtains containing Ni＞80g/l, Cu＜0.5g/l, H
2SO
4The nickel sulfate solution of＜10g/l is sent to recovery nickel, and leached mud carries out two sections leachings, and leaching agent is a sulphuric acid soln.In two sections one section leached muds when leaching in sedimentary copper and the raw material major part of copper leached, obtain the copper-bath of Cu/Ni 〉=2, this solution removes part copper and generates sulfuric acid through electrodeposition, its vitriolic amount with thick, that fine alloy leaches the copper amount is suitable, liquid all returns one section leaching of coarse grain behind the decopper(ing).Leached mud is used to extract precious metal.
2. the chemical principle that leaches of coarse grain alloy:
One section leaching of coarse grain alloy divides two stages: oxidation period and locomorphic stage.Lead to oxygen oxidation period, mainly leach Cu, Fe, Ni, Co in the alloy.When the ph value reaches certain numerical value, stop oxygen, leach and enter locomorphic stage.Mainly utilize the Ni, the Fe metal replacement copper that are not leached in the alloy.Ni, Fe, Co mainly exist with metallic state in the coarse grain alloy.According to their character, in oxidation period following reaction may take place:
Fe
0+H
2SO
4＝FeSO
4+H
2↑ (1)
Ni
0+H
2SO
4＝NiSO
4+H
2↑ (2)
Fe
0+1/2O
2+H
2SO
4＝FeSO
4+H
2O (3)
Ni
0+1/2O
2+H
2SO
4＝NiSO
4+H
2O (4)
Fe
0+CuSO
4＝FeSO
4+Cu
0 (5)
Ni
0+CuSO
4＝NiSO
4+Cu
0 (6)
Fe
0+Fe
2(SO
4)
3＝3FeSO
4 (7)
Ni
0+Fe
2(SO
4)
3＝NiSO
4+2FeSO
4 (8)
(1), (2) reaction exists, this can observe from experiment, when leaching obstructed oxygen, slag has poly-and rising phenomenon, obviously is due to the slag particle surface adsorption hydrogen.It is very little changing slowly the contribution of reaction (1), (2) as can be seen leaching velocity being done from pH, does not exist with alloy state because iron, nickel are with simple substance.Fe0 and Ni when leading to oxygen
0Mainly generated water with (3), the oxidation of (4) formula reactive hydrogen.
Reaction (3), (4) are leached in the reaction at all and are occupied certain weight proportion, but speed of response is limited, and when not adding copper leaching only logical oxygen, the leaching yield of 4 hours nickel has only 54%.
When aerobic, sulfuric acid and cupric ion existed, that carries out in the oxidising process was very fast, and this is because (5), (6), (7), (8) these 4 reactions have taken place.Because Cu
2+And Fe
3+Participate in displacement and oxidizing reaction, leaching process is quickened greatly.
Fe
3+Be by Fe
2+Oxidation and come.Fe
2+Can react by following formula:
2FeSO
4+1/2O
2+H
2SO
4＝Fe
2(SO
4)
3+H
2O (9)
In fact, this reaction is carried out quite slowly.As Cu
2+When existing, Fe
2+Oxidation rate will accelerate:
Fe
2++Cu
2+＝Fe
3++Cu
+ (10)
Cu
++1/4O
2+H
2＝Cu
2++1/2H
2O (11)
The katalysis of cupric ion is carried out according to top two reaction formula just.
By (5), (6), two Cu that reaction generates
0Also can be oxidized to Cu
2+:
Cu
0+1/2O
2+H
2SO
4＝CuSO
4+H
2O (12)
Cu
0+Fe
2(SO
4)
3＝CuSO
4+2FeSO
4 (13)
In oxidising process, copper is played the effect of an acid by repeated precipitation and dissolving.Because sedimentation speed is greater than oxidation rate, how on a declining curve copper ion concentration is.The obvious example of the oxidized dissolved of copper is, copper ion concentration descends earlier, rises in the back, even surpasses starting point concentration.This is because oxidation rate has surpassed sedimentation speed.
In sum, Cu
2+In oxidising process, not only play the effect of leaching agent, the more important thing is and play catalyst action, just because of its existence, just can make the higher speed of reaction acquisition that leaches.
In locomorphic stage, obstructed oxygen, principal reaction is the deposition of copper, undertaken by reaction (5), (6), formula, cupric ion, copper ion concentration can be reduced to 1mg/l.Fe
3+Also will be reduced to Fe
2+
Deriving and testing the copper and the clean quantity (by mole) that consumes of sulfuric acid that all show in the leaching agent equals to leach element, as the summation of nickel, iron, cobalt and other soluble materials.Cupric ion shared ratio in leaching agent is 20-40%.
The leaching reaction of cobalt element is identical with nickel in the alloy.
In second section leaching process, leaching agent is a sulfuric acid, under the condition of logical oxygen, at first leaches copper by the reaction of (12) formula, also can react by (5), (6), (7), (8) formula thereafter, even the copper of metallographic phase, nickel, iron, cobalt all dissolves.(3), (4), (1), (2) reaction factor amount seldom, reacting weight is smaller.
3. test-results
3.1 the physicochemical property of coarse grain alloy
Be the checking such scheme, we have carried out necessary test, and the physicochemical property of the coarse grain alloy that test is adopted are as follows:
1) size-grade distribution
Size-grade distribution sees Table 3-1
The size-grade distribution of table 3-1 coarse grain alloy
| Grain warp/mm | ＞1 | 1-0.5 | 0.5-0.25 | 0.25-0.154 | 0.154-0.074 | ＜0.074 |
| Distribution/% | 0.8 | 12.7 | 26.9 | 25.9 | 19.9 | 13.8 |
2) density
After measured: the true density of coarse grain alloy is 7.75g/cm
3
The loose density of coarse grain alloy is 2.25g/cm
3
The tap density of coarse grain alloy is 2.65g/cm
3
3) chemical ingredients
Chemical ingredients sees Table 3-2
The chemical ingredients of table 3-2 coarse grain alloy
| Element | Ni | Fe | Co | Cu | S | Al 2O 3 | SiO 2 | CaO | MgO |
| Content % | 72.56 | 10.03 | 1.26 | 11.29 | 1.25 | 1.00 | 0.77 | ＜0.02 | ＜0.02 |
3.2 the physicochemical property of fine alloy
The physicochemical property of the fine alloy that test is adopted are as follows:
1) size-grade distribution of fine alloy sees Table 3-3
The size-grade distribution of table 3-3 fine alloy
| Grain warp/mm | ＞0.154 | 0.154-0.074 | 0.074-0. | 0.05 | 0.05-0.045 | ＜0.045 |
| Distribution/% | 5.8 | 12.6 | 15.2 | 13.8 | 13.8 | 38.7 |
2) Chemical Composition of fine alloy
We used two batch materials at the trial, and its Chemical Composition is as table 3-4,3-5.
The Chemical Composition of table 3-4 fine alloy
3) the thing phase of alloy
The thing phase composite of fine alloy is as follows:
Table 3-5 material dosing analytical results
| The thing phase | Nickelous sulfide | Cupric sulfide | Alloy | Magnetite | Gangue |
| Composition/% | 39.0 | 1.1 | 48.9 | 6.0 | 5.0 |
3.3 investigation about metallographic phase in two sections leached muds
We utilize microscope, and means such as electronic probe have been carried out examination of product to two sections leached muds, and the result is as follows:
(1) material in the product is formed
Mainly be NiS in the product, next has metallic copper, chalcopyrite, pentlandite, the Ni of copper glance, magnetite, trace
3S
2, slag, CuS, (FeNiCu) S, ferric oxide etc.Wherein NiS is Ni
3S
2After two sections leachings, change and come, see the electron probe microanalysis result:
Table 3-6 nickelous sulfide electron probe microanalysis result/%
| Content | S | Fe | Co | Ni | Cu | Add up to |
| Soak preceding nickelous sulfide | 25.8 | 0.70 | 0.96 | 71.89 | 0.36 | 99.71 |
| Soak postcure nickel | 35.67 | 0.22 | 1.30 | 60.32 | 2.16 | 99.67 |
| Soak the residual Ni in back 3S 2 | 25.34 | 0.61 | 0.92 | 72.86 | 0.15 | 99.88 |
The content and the existence form of (2) two sections leached mud interalloies
Utilize the microscope statistical technique that the residual alloys in the product has been carried out quantitative analysis, its result is 14ppm (14g/t).
The existence form of alloy in product has following several:
A, independent alloy with other particle adhesion or symbiosis, can not divide two kinds again: a kind of because mechanical sneaking into; Another kind of is corrosion remnants.The former quantity is few but granularity is bigger, is 0.06 * 0.012 to the maximum.The latter is main residual alloys, and granularity does not wait.
B, with other particle adhesion or symbiosis, as with adhesion or symbiosis such as magnetite, metallic copper, copper glance, NiS.
Composition before and after alloy leaches changes little, sees the electron probe microanalysis result:
Table 3-7 alloying constituent electron probe microanalysis result/%
| Content | S | Fe | Co | Ni | Cu | Add up to |
| Before the leaching | 0.19 | 10.61 | 1.57 | 78.22 | 8.87 | 99.46 |
| After the leaching | 0.18 | 8.75 | 1.38 | 79.42 | 10.02 | 99.75 |
(3) conclusion
Two sections leached mud interalloy content are few, even whole nickel wherein, iron, cobalt and acid-respons generate hydrogen, its content also is safe.
3.4 concentration effect about precious metal
Duration of test was once analyzed one, two sections leached muds of normal pressure thick, fine alloy, and its bullion content is as table 3-8.
Table 3-8 precious metal grade/g/t
| Title | P t | P d | A u |
| One section leached mud of coarse grain | 502 | 187 | 139 |
| Two sections leached muds of coarse grain | 8680 | 2890 | 1090 |
| One section leached mud of particulate | 10.4 | 50.8 | 43.5 |
| Two sections leached muds of particulate | 198 | 91.8 | 90.3 |
According to two sections slag rates of coarse grain is 3.3% reckoning, and concentration of precious metal can reach 30 times.
Claims (9)
1. the extract technology of copper nickel coarse grain alloy is characterized in that: adopt segmentation to leach mode, comprise one section leaching and two sections leachings of carrying out successively, one section leached mud is as the raw material of two sections leachings, and two sections leached muds are as the raw material that is used to extract precious metal.
2. the extract technology of copper nickel coarse grain alloy according to claim 1 is characterized in that: in described one section leaching, the two sections leachings, include logical oxygen step.
3. the extract technology of copper nickel coarse grain alloy according to claim 1, it is characterized in that: the leaching agent of described one section leaching comprises the sulfuric acid of sulfuric acid or copper ions.
4. the extract technology of copper nickel coarse grain alloy according to claim 1, it is characterized in that: the leaching agent of described two sections leachings comprises sulfuric acid, and copper, nickel, iron and the brill of metallographic phase in one section leached mud leached, two sections leach liquors of acquisition are copper-baths.
5. the extract technology of copper nickel coarse grain alloy according to claim 4, it is characterized in that: described copper-bath is liquid after the electrodeposition decopper(ing) obtains electrolytic copper and decopper(ing).
6. the extract technology of copper nickel coarse grain alloy according to claim 4 is characterized in that: described copper-bath is the copper-bath of a kind of Cu: Ni 〉=2: 1.
7. the extract technology of copper nickel coarse grain alloy according to claim 5, it is characterized in that: liquid turns back in the leaching agent of one section leaching behind the described decopper(ing).
8. the extract technology of copper nickel coarse grain alloy according to claim 1, it is characterized in that: the leaching agent of described one section leaching comprises the sulfuric acid of copper ions, and in one section leaching process, nickel, iron, cobalt are leached, and copper is gone into slag by cementation, obtains nickel sulfate solution.
9. the extract technology of copper nickel coarse grain alloy according to claim 8, it is characterized in that: described nickel sulfate solution is a kind of Ni＞80g/l, Cu＜0.5g/l, H
2SO
4The nickel sulfate solution of＜10g/l.
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| CNA2008101196269A CN101348864A (en) | 2008-09-04 | 2008-09-04 | Leaching process of copper nickel coarse grain alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103834814A (en) * | 2014-03-11 | 2014-06-04 | 斯莱登（北京）化工科技有限公司 | Method for preparing iron oxide red by using copper nickel slag |
| CN104017989A (en) * | 2014-06-16 | 2014-09-03 | 天津市茂联科技有限公司 | High ferroalloy treatment process |
| CN104263958A (en) * | 2014-08-30 | 2015-01-07 | 广东省工业技术研究院(广州有色金属研究院) | Method for separating copper, nickel or cobalt and platinum family elements from platinum family concentrates |
| CN115679104A (en) * | 2022-10-15 | 2023-02-03 | 湘南学院 | A process for comprehensive recovery of nickel, copper and iron from nickel sulfate purification slag |
| CN116356148A (en) * | 2023-05-31 | 2023-06-30 | 金川集团股份有限公司 | A pretreatment method for enriching precious metals with carbonylated alloys |
| CN117448567A (en) * | 2023-11-14 | 2024-01-26 | 金川集团股份有限公司 | A leaching method for high bulk ratio copper-nickel alloy powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103834814A (en) * | 2014-03-11 | 2014-06-04 | 斯莱登（北京）化工科技有限公司 | Method for preparing iron oxide red by using copper nickel slag |
| CN104017989A (en) * | 2014-06-16 | 2014-09-03 | 天津市茂联科技有限公司 | High ferroalloy treatment process |
| CN104263958A (en) * | 2014-08-30 | 2015-01-07 | 广东省工业技术研究院(广州有色金属研究院) | Method for separating copper, nickel or cobalt and platinum family elements from platinum family concentrates |
| CN104263958B (en) * | 2014-08-30 | 2016-04-20 | 广东省工业技术研究院(广州有色金属研究院) | A kind of method being separated Cu, Ni and Co and platinum family element from platinum family concentrate |
| CN115679104A (en) * | 2022-10-15 | 2023-02-03 | 湘南学院 | A process for comprehensive recovery of nickel, copper and iron from nickel sulfate purification slag |
| CN115679104B (en) * | 2022-10-15 | 2025-03-21 | 湘南学院 | A process for comprehensive recovery of nickel, copper and iron from nickel sulfate purification slag |
| CN116356148A (en) * | 2023-05-31 | 2023-06-30 | 金川集团股份有限公司 | A pretreatment method for enriching precious metals with carbonylated alloys |
| CN116356148B (en) * | 2023-05-31 | 2023-08-22 | 金川集团股份有限公司 | A pretreatment method for enriching precious metals with carbonylated alloys |
| CN117448567A (en) * | 2023-11-14 | 2024-01-26 | 金川集团股份有限公司 | A leaching method for high bulk ratio copper-nickel alloy powder |
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