CN101348863A - Combined leaching process of copper nickel coarse grain alloy and copper nickel fine grain alloy - Google Patents
Combined leaching process of copper nickel coarse grain alloy and copper nickel fine grain alloy Download PDFInfo
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Abstract
The invention relates to a nickel-copper coarse-grained alloy and a combined leaching technology for the nickel-copper coarse-grained alloy. The combined leaching technology for the nickel-copper coarse-grained alloy can improve the leaching efficiency and the separation effect of copper, nickel and cobalt in the alloy and the recovery rate of noble metals in leaching slag, and avoid the environmental pollution brought by the vulcanization technology. The combined leaching technology for the nickel-copper coarse-grained alloy comprises the sectional leaching means of the coarse-grained alloy and the sectional leaching means of a fine-grained alloy, wherein the sectional leaching means of the coarse-grained alloy comprises primary leaching of coarse grains and secondary leaching of the coarse grains which are performed in turn; primary leaching slag of the coarse grains is taken as a raw material for the secondary leaching of the coarse grains, and secondary leaching slag of the coarse grains is used as a raw material for extracting the noble metals; the sectional leaching means of the fine-grained alloy comprises primary leaching of fine grains, secondary leaching of the fine grains and pressure leaching of the fine grains; primary leaching slag of the fine grains is taken as a raw material for the secondary leaching of the fine grains, secondary leaching slag of the fine grains is taken as a raw material for the pressure leaching of the fine grains, and pressure leaching slag of the fine grains is taken as a raw material for extracting the noble metals; and one part of lixivium of the secondary leaching of the fine grains is returned back to a leaching agent of the primary leaching of the coarse grains.
Description
Technical field
The present invention relates to the acidleach treatment process of cu-ni sulphide ore thing, belong to a kind of Technology that coarse grain alloy in the floating intermediates of high-sulfur mill and fine alloy are carried out wet processing, the combined leaching process of particularly a kind of copper nickel coarse grain alloy and copper nickel fine alloy.
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, the combined leaching process of a kind of copper nickel coarse grain alloy and copper nickel fine alloy is provided, thereby improve noble metal recovery rate in the leached mud, and the environmental pollution of avoiding sulfuration process to bring.
Technical scheme of the present invention is as follows:
The combined leaching process of copper nickel coarse grain alloy and copper nickel fine alloy, it is characterized in that: mode is leached in the segmentation that comprises coarse grain alloy, leach mode with the segmentation of fine alloy, the segmentation leaching mode of described coarse grain alloy comprises one section leaching of coarse grain and two sections leachings of coarse grain of carrying out successively, one section leached mud of coarse grain is as the raw material of two sections leachings of coarse grain, and two sections leached muds of coarse grain are as the raw material that is used to extract precious metal; The segmentation leaching mode of described fine alloy comprises that the one section leaching of particulate, the particulate that carry out successively leach and particulate pressurization leaching for two sections, one section leached mud of particulate is as the raw material of two sections leachings of particulate, two sections leached muds of particulate raw material that pressurization is leached as particulate, particulate pressurization leached mud is as the raw material that extracts precious metal; The leach liquor part of two sections leachings of described particulate is returned in the leaching agent of one section leaching of coarse grain.
The part of the leach liquor of two sections leachings of described particulate is returned in the leaching agent of one section leaching of particulate.
The leaching agent of one section leaching of described particulate comprises the sulfuric acid of copper ions, and the leaching agent of two sections leachings of described particulate comprises sulfuric acid.
The leaching agent of one section leaching of described coarse grain with the sulfuric acid of copper ions as leaching agent.
The leaching agent of two sections leachings of described coarse grain comprises sulfuric acid, and with copper, nickel, iron and the cobalt leaching of metallographic phase in one section leached mud of coarse grain, two sections leach liquors of the coarse grain of acquisition are copper-baths.
Described copper-bath is the copper-bath of a kind of Cu: Ni 〉=2: 1, and described copper-bath is liquid after the electrodeposition decopper(ing) obtains electrolytic copper and decopper(ing), and liquid turns back in the leaching agent of one section leaching of coarse grain behind the described decopper(ing).
The leaching agent that described particulate pressurization is leached comprises sulfuric acid, and the particulate pressurization leach liquor that this leaching agent leaches returns in the leaching agent of one section leaching of particulate.
The leaching agent of one section leaching of described particulate comprises the sulfuric acid of copper ions, and one section leach liquor of particulate that this leaching agent leaches obtains liquid after scum and the deironing by the pressurization deironing, and liquid send the anolyte purification system after this deironing.
Technique effect of the present invention is as follows:
Experiment showed, the combined leaching process of implementing copper nickel coarse grain alloy of the present invention and copper nickel fine alloy, for fine alloy, but can fully realize improving the leaching yield of extracts such as Ni, Fe, Co, Cu, S; For coarse grain alloy, but can fully realize improving the leaching yield of extracts such as Ni, Fe, Co, Cu; And,, realized the circulation pattern of leaching process better by the leach liquor part of two sections leachings of particulate is returned in the leaching agent of one section leaching of coarse grain; Thereby can effectively improve noble metal recovery rate in the leached mud, and avoid 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. fine alloy and coarse grain alloy extract technology process are described below:
Two sections leach liquors with the pressurization leach liquor that contains sulfuric acid and cupric ion and about 70% leach fine alloy, nickel, iron, cobalt dissolving, and the cupric ion precipitation obtains containing Ni＞80g/l, Cu＜0.5g/l, H
2SO
4The nickel sulfate solution of＜10g/l is incorporated the anolyte purification system into after deironing.Leached mud carries out two sections normal pressure oxygen and leaches, and leaching agent is a sulphuric acid soln.Two sections when leaching, in one section leached mud in sedimentary copper and the alloy copper bearing major part leached, this leach liquor major part is returned one section leaching, about 30% delivers to one section leaching of coarse grain, wherein contained copper equals the whole of fine alloy leaching copper.Two sections leached muds advance pressurization and leach, and adopt to contain H
2SO
4The aqueous solution of＜10g/l is as leaching agent.Leach liquor all returns one section leaching, and the leached mud trial of strength seldom, can be used as the raw material that extracts precious metal.In order to accelerate leaching velocity, logical oxygen is as oxygenant during leaching.
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.During two sections leachings, in one section slag 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.
2.1. the chemical principle that coarse grain alloy leaches:
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.Fe when leading to oxygen
0And Ni
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.
2.2. the chemical principle that fine alloy leaches:
In the fine alloy, alloy content is about 50%, and sulfur-bearing is higher, thereby contains more nickelous sulfide, and the method the same with coarse grain alloy adopted in one, two section leaching.So the chemical reaction and the coarse grain of leaching process are basic identical, promptly the both carries out the chemical reaction of above-mentioned (1)～(13).Because following reaction when normal pressure leaches particularly two sections leachings of fine alloy, also can take place in the existence of nickelous sulfide:
Ni
3S
2+CuSO
4＝NiSO
4+Cu
0+2NiS (14)
Ni
3S
2+1/2O
2+H
2SO
4＝NiSO
4++2NiS+(15)
H
2O
The Cu that reaction (14) generates
0Can continue to be oxidized to Cu
2+
Two sections leached muds find to have a large amount of NiS to exist by pin check, and Ni is described
3S
2In Ni
0Can be partly dissolved.
In the pressurization leaching process, main chemical reaction is the dissolving of the sulfide of nickel and copper, and its reaction formula is as follows;
NiS+2O
2＝NiSO
4 (16)
Ni
3S
2+H
2SO
4+9/2O
2＝3NiSO
4+H
2O (17)
CuS+2O
2＝CuSO
4 (18)
CuS+1/2O
2+H
2SO
4＝CuSO
4+H
2O+ (19)
S
0
The sulfide of a spot of cobalt, iron is also equally oxidized with NiS, leaches.
In the pressurization leached mud with on the wall, there is sulphur to exist, illustrates to generate S in the leaching process
0, generate reason most possible be autoclave when heating up, produce sulphur when high through low-temperature zone and acidity.Under this experiment condition, sulphur becomes SO
2- 4Transformation efficiency be 98%, so S
0Production rate very little.
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 (8)
1. the combined leaching process of copper nickel coarse grain alloy and copper nickel fine alloy, it is characterized in that: comprise the segmentation leaching mode of coarse grain alloy and the segmentation leaching mode of fine alloy, the segmentation leaching mode of described coarse grain alloy comprises one section leaching of coarse grain and two sections leachings of coarse grain of carrying out successively, one section leached mud of coarse grain is as the raw material of two sections leachings of coarse grain, and two sections leached muds of coarse grain are as the raw material that is used to extract precious metal; The segmentation leaching mode of described fine alloy comprises that the one section leaching of particulate, the particulate that carry out successively leach and particulate pressurization leaching for two sections, one section leached mud of particulate is as the raw material of two sections leachings of particulate, two sections leached muds of particulate raw material that pressurization is leached as particulate, particulate pressurization leached mud is as the raw material that extracts precious metal; The leach liquor part of two sections leachings of described particulate is returned in the leaching agent of one section leaching of coarse grain.
2. the combined leaching process of copper nickel coarse grain alloy according to claim 1 and copper nickel fine alloy is characterized in that: the part of the leach liquor of two sections leachings of described particulate is returned in the leaching agent of one section leaching of particulate.
3. the combined leaching process of copper nickel coarse grain alloy according to claim 1 and copper nickel fine alloy is characterized in that: the leaching agent of one section leaching of described particulate comprises the sulfuric acid of copper ions, and the leaching agent of two sections leachings of described particulate comprises sulfuric acid.
4. the combined leaching process of copper nickel coarse grain alloy according to claim 1 and copper nickel fine alloy is characterized in that: the leaching agent of one section leaching of described coarse grain with the sulfuric acid of copper ions as leaching agent.
5. the combined leaching process of copper nickel coarse grain alloy according to claim 1 and copper nickel fine alloy, it is characterized in that: the leaching agent of two sections leachings of described coarse grain comprises sulfuric acid, copper, nickel, iron and the cobalt of metallographic phase in one section leached mud of coarse grain are leached, and two sections leach liquors of the coarse grain of acquisition are copper-baths.
6. the combined leaching process of copper nickel coarse grain alloy according to claim 5 and copper nickel fine alloy, it is characterized in that: described copper-bath is the copper-bath of a kind of Cu: Ni 〉=2: 1, described copper-bath is liquid after the electrodeposition decopper(ing) obtains electrolytic copper and decopper(ing), and liquid turns back in the leaching agent of one section leaching of coarse grain behind the described decopper(ing).
7. the combined leaching process of copper nickel coarse grain alloy according to claim 1 and copper nickel fine alloy, it is characterized in that: the leaching agent that described particulate pressurization is leached comprises sulfuric acid, and the particulate pressurization leach liquor that this leaching agent leaches returns in the leaching agent of one section leaching of particulate.
8. the combined leaching process of copper nickel coarse grain alloy according to claim 1 and copper nickel fine alloy, it is characterized in that: the leaching agent of one section leaching of described particulate comprises the sulfuric acid of copper ions, one section leach liquor of particulate that this leaching agent leaches obtains liquid after scum and the deironing by the pressurization deironing, and liquid send the anolyte purification system after this deironing.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177283A (en) * | 2014-06-10 | 2015-12-23 | 天津市茂联科技有限公司 | Deep leaching method of copper-containing alloy leaching tailings |
| RU2810029C1 (en) * | 2022-11-01 | 2023-12-21 | Общество с ограниченной ответственностью "Научно-исследовательский центр "Гидрометаллургия" | Method for processing crushed metallized copper-nickel industrial product containing noble metals |
-
2008
- 2008-09-04 CN CN2008101196254A patent/CN101348863B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177283A (en) * | 2014-06-10 | 2015-12-23 | 天津市茂联科技有限公司 | Deep leaching method of copper-containing alloy leaching tailings |
| RU2810029C1 (en) * | 2022-11-01 | 2023-12-21 | Общество с ограниченной ответственностью "Научно-исследовательский центр "Гидрометаллургия" | Method for processing crushed metallized copper-nickel industrial product containing noble metals |
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|---|---|
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