CN109824096A - A method of nickel sulfate is produced by raw material of the low nickel matte of high-speed rail - Google Patents
A method of nickel sulfate is produced by raw material of the low nickel matte of high-speed rail Download PDFInfo
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Abstract
The invention discloses a kind of methods for producing nickel sulfate as raw material using the low nickel matte of high-speed rail, belong to field of metallurgy, and to solve, the loss of cobalt present in conventional vulcanized nickel minerals smelting process is big, long, the intermediate return slag amount of process flow is big, the low problem of metal yield.Include the following steps: to leach by raw material nitric acid of low nickel matte, the removing of iron can be realized by being concentrated by evaporation for leachate, except liquid uses spray pyrolysis to obtain nickel cobalt Cu oxide after iron, sulfuric acid dissolution ambrose alloy cobalt/cobalt oxide, lysate extracts ambrose alloy separation, abstraction impurity removal, extraction Separation of nickel and cobalt, finally obtains pure nickel sulfate solution.Nitric recycle uses in this method, except iron, extraction copper process do not add other reagents, thus foreign ion is not introduced in system, no waste residue, waste water generate, high-speed rail in low nickel matte wet leachate, the separation difficult point of high-copper can be overcome completely, the nitrogen oxides of technical process can absorb nitric acid processed, and return system utilizes.With good economic efficiency and resource environment benefit.
Description
Technical field
The invention belongs to field of metallurgy, and in particular to a method of produce nickel sulfate.
Background technique
Low nickel matte material is the smelting removing calcium and magnesium silicon of beneficiation concentrate of nickel sulfide ore and the product of part iron, low nickel matte material
Middle iron content is up to 40%.In conventional metallurgical technique, low nickel matte material be all made of pyrogenic process converting process by the iron in material blow into
Slag, the low high nickel matte of production iron content, but in the iron removal that blows, when iron content drops to 16-17%, in material cobalt start into
Enter scum, conventional blowing is < 4% except iron depth, and therefore, the cobalt in material largely loses in blowing iron removal.According to
The low nickel matte material of wet processing processing, can be improved the rate of recovery of cobalt, and therefore, a large amount of metallargist starts to explore wet-treating
The new process of low nickel matte material.
The Ni+Cu+Co > 20% of low nickel matte material, iron content 30-50%.The low adoptable hydrometallurgical processes of nickel matte material
There are sulfuric acid normal pressure or pressure leaching process, chlorine leaching process, chlorine oxygen lixiviation process, but the leachate of these three methods is carrying out ferronickel point
When from the separation of, ambrose alloy, a large amount of alkali need to be added, cause separation costs very high, waste water and dregs discharge amount is big, valuable metal entrainment
Also high, the process costs of various separation methods are much higher than existing pyrometallurgical smelting process.Therefore, there has been no the low nickel mattes of high-speed rail at present
The document announcement and industrial application of direct wet-treating production nickel sulfate product.
Summary of the invention
The object of the present invention is to provide a kind of methods for producing nickel sulfate as raw material using the low nickel matte of high-speed rail, to solve traditional sulphur
Cobalt loss present in change nickel minerals smelting process is big, long, the intermediate return slag amount of process flow is big, the low problem of metal yield.
Technical solution of the present invention is as follows: a method of nickel sulfate being produced by raw material of the low nickel matte of high-speed rail, including is walked as follows
It is rapid: to be leached by raw material nitric acid of low nickel matte, the removing of iron can be realized by being concentrated by evaporation for leachate, and liquid is using spraying after removing iron
It is pyrolyzed to obtain nickel cobalt Cu oxide, sulfuric acid dissolution ambrose alloy cobalt/cobalt oxide, lysate extracts ambrose alloy separation, abstraction impurity removal, extraction nickel cobalt
Separation, finally obtains pure nickel sulfate solution.
As a further improvement of the present invention, detailed step is as follows,
A. leach: low nickel matte material uses nitric acid normal pressure leaching, obtains the leachate of nickeliferous, copper, iron, cobalt nitrate；It is enriched
The leached mud of noble metal enters precious metal smelting process.
B. pyrolysis removes iron: leaching solution being heated and is concentrated, until being diluted with water, after dilution after boiling point is 130-140 DEG C
Ore pulp carries out solid-liquor separation and obtains except liquid and iron dross removing after iron；The low nickel matte leaching solution of high-speed rail is by being concentrated by evaporation, until solution
Iron starts to hydrolyze to form scum after boiling point reaches 130-140 DEG C, and iron removal is without adding any reagent；Impurity lead, arsenic, silicon are big
Part enters scum.
C. pyrolysis transition: except after iron liquid in 350-550 DEG C of spray pyrolysis, make nitrate be decomposed into nickel cobalt Cu oxide and
Oxides of nitrogen gas (nitrogen oxides enters flue gas reclamation set)；
D. sulfuric acid dissolution ambrose alloy cobalt/cobalt oxide: the oxide sulfuric acid normal-temperature dissolution after pyrolysis；Obtain the high sulfuric acid ambrose alloy cobalt of cupric
Solution.
E. extract decopper(ing): sulfuric acid dissolution liquid carries out ambrose alloy separation using extraction, and alkali neutralization is not added in extraction process；Sulfuric acid
Lysate extracts copper removal, and load organic counter liquid enters electrodeposition production process；(load is organic to be stripped with copper electrodeposition anolyte, instead
Extract liquid electrodeposition and produces electro deposited copper.)
F. extract de- cobalt demagging, deliming: liquid carries out Separation of nickel and cobalt using nickel cobalt extractant after extraction copper；
Using nickel sulfate solution is obtained after removal of impurities extractant abstraction impurity removal, nickel sulfate solution can evaporative crystallization production nickel sulfate.Sulphur
Sour nickel solution produces electro deposited nickel, can also pass through sulfuric acid nickel salt production process.
As a further improvement of the present invention, the Ni+Cu+Co > 20% of low nickel matte material used in the step a, iron content
30-50%。
As a further improvement of the present invention, nitric acid dosage is 0.8-1.1 times of theoretical amount in the step a, leaches temperature
Degree is 85 DEG C -110 DEG C, Leach reaction time 2.0-3.0h.
Nitric acid leaches low nickel matte material, and obtaining typical composition is (g/L): Ni 30-60, Co 1-3, Cu 10-35, Fe
50-90、NO3 -The leachate of 250-400.
As a further improvement of the present invention, the volume ratio of liquid is 0.5- after water is diluted in the step b and is concentrated
1.5:1。
As a further improvement of the present invention, the oxide sulfuric acid dissolution temperature after being pyrolyzed in the step d is 40-50
DEG C, the pH that gained nickel cobalt Cu oxide dissolves terminal is 3.5-4.5.
As a further improvement of the present invention, the extractant in the step e is copper extractant DZ973N.
As a further improvement of the present invention, Separation of nickel and cobalt extractant is DZ272 in the step f, and removal of impurities extractant is
P204, using the acid in nickel cobalt oxide with generation when extracting cobalt, removal of impurities, nickel cobalt oxide is liquid warp after low nickel matte displacement copper removal
Except obtained by spray pyrolysis after iron.
As a further improvement of the present invention, extract copper using three stage countercurrents in the step e, extraction copper compares O/A=2:1, extraction
Extraction raffinate is liquid after one section of extraction copper, and liquid is divided into two parts by theoretical amount after one section of extraction copper, wherein the molten process of 57.3% acid reflux,
42.7% returns neutralization step；It is 4.0 that N-process, which controls terminal pH, and neutralization temperature is 40-50 DEG C；Liquid carries out two sections of extractions after neutralization
Copper, three stage countercurrents, extraction copper compare O/A=1:1, and liquid is liquid after two sections of extraction copper after extracting copper, and load is organic to return one section of extraction copper process；One
Duan Cuitong loads organic washing, and O/A=6:1 is compared in washing, and the molten process of wash water acid reflux, washing back loading is organic to enter back extraction process,
The sulfuric acid concentration of liquid is 180g/L before being stripped, and copper ion concentration is 30g/L in liquid before being stripped, and O/A=1:1 is compared in back extraction.
As a further improvement of the present invention, liquid extracts de- cobalt demagging after two sections of extraction copper in the step f, and liquid is two before extracting
Liquid after Duan Cuitong, adjusting pH with nickel cobalt oxide is 6.0, compares O/A=3:1, the extraction of 8-10 stage countercurrent；
The organic extraction of liquid is miscellaneous after extracting cobalt magnesium, and adjusting pH is 3.5-4.0, compares O/A=1:3, the extraction of eight stage countercurrents.
The present invention is directed to the low nickel matte of conventional vulcanized mine pyrometallurgical smelting intermediate product, analyzes the low direct wet process of nickel matte material and opens
The technological difficulties and cost factor of road processing, to produce nickel sulfate product.
Ni/Cu=the 2-3, iron content 30-50% of low nickel matte material according to the present invention.Each technical process rank in this method
It connects scientific and reasonable, by the efficient combination of different processes, forms a kind of technology and economically viable completely new process flow.Technique
Iron-pyrolysis-sulfuric acid dissolution-extraction copper-removal of impurities-extraction cobalt is leached-removes using the low nickel matte nitric acid of high-speed rail, final products are that nickel sulfate is molten
Liquid, nickel sulfate solution produce electro deposited nickel, can also pass through sulfuric acid nickel salt production process.
In entire iron removal, except iron rate is up to 99% or more.Except iron liquid extraction and separation ambrose alloy, liquid is extracted again after extracting copper
De- cobalt, removal of impurities are taken, this method metal direct yield is high, and Cu, Ni and Co separation is thoroughly, at low cost.
Nitric recycle uses in this method, except iron, extraction copper process do not add other reagents, thus does not introduce in system miscellaneous
Matter ion, no waste residue, waste water generate, and can overcome high-speed rail in low nickel matte wet leachate, the separation difficult point of high-copper, technique completely
The nitrogen oxides of process can absorb nitric acid processed, and return system utilizes.It is a kind of high-efficiency cleaning New Metallurgical Technique, there is good warp
Benefit of helping and resource environment benefit.
Detailed description of the invention
Fig. 1 is a kind of process flow chart that nickel sulfate is produced using the low nickel matte of high-speed rail as raw material.
Specific embodiment
A kind of process producing nickel sulfate using low nickel matte as raw material, critical process successively include: that nitric acid leaches, is hot
It releases iron, spray pyrolysis transition, sulfuric acid dissolution, extraction decopper(ing), extraction cobalt and extracts miscellaneous etc..
Technique of the invention is further described with following nonlimiting examples, to help to understand the present invention
And its advantage, and not as limiting the scope of the present invention.
Extractant in embodiment is commercially available existing product.
Embodiment 1
The chemical component of low nickel matte used in embodiment 1 is shown in Table 1:
Specific implementation process is as follows:
(1) nitric acid leaches: leaching 1.0 times that nitric acid dosage is theoretical amount, extraction temperature is 85 DEG C, Leach reaction time 2.0h.
Ammonium acetate (g/L): Ni 33.56, Cu 14.42, Fe 86.06, Co 2.84.
(2) pyrolysis removes iron: the concentration of leaching solution heating evaporation, after a certain period of time, solution boiling point are 135 DEG C, in solution
Iron all hydrolysis slag inputs, stop heating, water dilution be added, dilution water be 1.0 times of liquid accumulated amount after concentration, and filtering is filtered
Slag is hydrolysis scum, and filtrate is to remove finished fluid after iron.Except iron liquid ingredient (g/L): Ni 134.24, Cu 57.68, Fe 0.05,
Co 11.36、Pb 0.005、As<0.0001、Si<0.0001。
Pyrolysis transition: the control of spray pyrolysis temperature is 400 DEG C.Nickel cobalt oxide ingredient (%): Ni 50, Cu 21.48, Fe <
0.05,Co:4.23；
(3) sulfuric acid dissolution nickel cobalt oxide: at 45 DEG C, terminal pH control is 4.0 for temperature control.Sour soluble oxide ingredient: (g/
L): Ni 84.43, Cu 12.89, Fe 0.00026, Co 3.61；
(4) extract decopper(ing): liquid tri- stage countercurrent of DZ973N extracts copper after acid is molten, and extraction copper compares O/A=2:1, and raffinate is a Duan Cui
Liquid after copper, liquid is divided into two parts by theoretical amount after one section of extraction copper, wherein the molten process of 57.3% acid reflux, 42.7% returns neutralization step.
It is 4.0 that N-process, which controls terminal pH, and neutralization temperature is 40-50 DEG C.Liquid carries out two Duan Cuitong after neutralization, and three stage countercurrents extract copper
Compared to O/A=1:1, liquid is liquid after two sections of extraction copper after extracting copper, and load is organic to return one section of extraction copper process.One section of extraction copper loads organic water
It washes, O/A=6:1 is compared in washing, and the molten process of wash water acid reflux, washing back loading is organic to enter back extraction process, and the sulfuric acid of liquid is dense before being stripped
Degree is 180g/L, and copper ion concentration is 30g/L in liquid before being stripped, and O/A=1:1 is compared in back extraction.Liquid chemical component is such as after two sections of extraction copper
Shown in table 2.
(5) extract de- cobalt demagging: liquid DZ272 extracts de- cobalt demagging after two sections of extraction copper.Organic phase concentration 10%, saponification rate
50%, liquid is liquid after two sections of extraction copper before extracting, and adjusting pH with nickel cobalt oxide is 6.0, compares O/A=3:1, the extraction of ten stage countercurrents.
DZ272 extracts liquid 0.00018g/L containing Co, Mg 0.0032g/L after cobalt magnesium.
(6) removing calcium with solvent extraction: DZ272 extracts liquid miscellaneous, the mainly deliming of P204 extraction after cobalt magnesium.Organic phase concentration 25%, saponification
Rate 60%, liquid is DZ272 raffinate before extracting, and adjusting pH is 4.0, compares O/A=1:3, the extraction of eight stage countercurrents.Liquid contains after P204 extraction calcium
Ca:0.0028g/L。
Final gained nickel sulfate solution ingredient is as shown in table 3.
Embodiment 2
The chemical component of low nickel matte used in embodiment 2 is shown in Table 4:
Specific implementation process is as follows:
(1) nitric acid leaches: leaching 0.8 times that nitric acid dosage is theoretical amount, extraction temperature is 85 DEG C, Leach reaction time 2.0h.
Ammonium acetate (g/L): Ni 30.256, Cu 14.8, Fe 62.5, Co 2.41.
(2) pyrolysis removes iron: the concentration of leaching solution heating evaporation, after a certain period of time, solution boiling point are 130-140 DEG C, molten
Iron all hydrolysis slag inputs in liquid, stop heating, and water dilution is added, and dilution water is 0.5 times of liquid accumulated amount after concentration, mistake
Filter, filter residue are hydrolysis scum, and filtrate is to remove finished fluid after iron.Except iron liquid ingredient (g/L): Ni 136.28, Cu 68.2, Fe
0.02、Co 10.46、Pb 0.004、As<0.0001、Si<0.0001。
Pyrolysis transition: the control of spray pyrolysis temperature is 350 DEG C.Nickel cobalt oxide ingredient (%): Ni 51.2, Cu 25.1, Fe
<0.02,Co:4.82；
(3) sulfuric acid dissolution nickel cobalt oxide: at 40 DEG C, terminal pH control is 3.5 for temperature control.Sour soluble oxide ingredient: (g/
L): Ni 85.25, Cu 13.5, Fe 0.00023, Co 3.58；
(4) extract decopper(ing): liquid tri- stage countercurrent of DZ973N extracts copper after acid is molten, and extraction copper compares O/A=2:1, and raffinate is a Duan Cui
Liquid after copper, liquid is divided into two parts by theoretical amount after one section of extraction copper, wherein the molten process of 57.3% acid reflux, 42.7% returns neutralization step.
It is 4.0 that N-process, which controls terminal pH, and neutralization temperature is 40 DEG C.Liquid carries out two Duan Cuitong, three stage countercurrents after neutralization, and extraction copper is compared
O/A=1:1, liquid is liquid after two sections of extraction copper after extracting copper, and load is organic to return one section of extraction copper process.One section of extraction copper loads organic washing, washes
It washs compared to O/A=6:1, the molten process of wash water acid reflux, washing back loading is organic to enter back extraction process, and the sulfuric acid concentration of liquid is before being stripped
180g/L, copper ion concentration is 30g/L in liquid before being stripped, and O/A=1:1 is compared in back extraction.Liquid chemical component such as table 5 after two sections of extraction copper
It is shown.
(5) extract de- cobalt demagging: liquid DZ272 extracts de- cobalt demagging after two sections of extraction copper.Organic phase concentration 10%, saponification rate
50%, liquid is liquid after two sections of extraction copper before extracting, and adjusting pH with nickel cobalt oxide is 6.0, compares O/A=3:1, the extraction of ten stage countercurrents.
DZ272 extracts liquid 0.00019g/L containing Co, Mg 0.0030g/L after cobalt magnesium.
(6) removing calcium with solvent extraction: DZ272 extracts liquid miscellaneous, the mainly deliming of P204 extraction after cobalt magnesium.Organic phase concentration 25%, saponification
Rate 60%, liquid is DZ272 raffinate before extracting, and adjusting pH is 3.5, compares O/A=1:3, the extraction of eight stage countercurrents.Liquid contains after P204 extraction calcium
Ca:0.0026g/L。
Final gained nickel sulfate solution ingredient is as shown in table 6.
Embodiment 3
The chemical component of low nickel matte used in embodiment 3 is shown in Table 7:
Specific implementation process is as follows:
(1) nitric acid leaches: leaching 1.1 times that nitric acid dosage is theoretical amount, extraction temperature is 110 DEG C, Leach reaction time 3.0h.
Ammonium acetate (g/L): Ni 34.6, Cu 11.52, Fe 98.4, Co 2.45.
(2) pyrolysis removes iron: the concentration of leaching solution heating evaporation, after a certain period of time, solution boiling point are 140 DEG C, in solution
Iron all hydrolysis slag inputs, stop heating, water dilution be added, dilution water be 1.5 times of liquid accumulated amount after concentration, and filtering is filtered
Slag is hydrolysis scum, and filtrate is to remove finished fluid after iron.Except iron liquid ingredient (g/L): Ni 130.25, Cu 43.31, Fe 0.06,
Co 10.96、Pb 0.005、As<0.0001、Si<0.0001。
Pyrolysis transition: the control of spray pyrolysis temperature is 550 DEG C.Nickel cobalt oxide ingredient (%): Ni 51.2, Cu 17.05,
Fe<0.04,Co:3.76；
(3) sulfuric acid dissolution nickel cobalt oxide: at 50 DEG C, terminal pH control is 4.5 for temperature control.Sour soluble oxide ingredient: (g/
L): Ni 85.2, Cu 10.38, Fe 0.00013, Co 3.20；
(4) extract decopper(ing): liquid tri- stage countercurrent of DZ973N extracts copper after acid is molten, and extraction copper compares O/A=2:1, and raffinate is a Duan Cui
Liquid after copper, liquid is divided into two parts by theoretical amount after one section of extraction copper, wherein the molten process of 57.3% acid reflux, 42.7% returns neutralization step.
It is 4.0 that N-process, which controls terminal pH, and neutralization temperature is 50 DEG C.Liquid carries out two Duan Cuitong, three stage countercurrents after neutralization, and extraction copper is compared
O/A=1:1, liquid is liquid after two sections of extraction copper after extracting copper, and load is organic to return one section of extraction copper process.One section of extraction copper loads organic washing, washes
It washs compared to O/A=6:1, the molten process of wash water acid reflux, washing back loading is organic to enter back extraction process, and the sulfuric acid concentration of liquid is before being stripped
180g/L, copper ion concentration is 30g/L in liquid before being stripped, and O/A=1:1 is compared in back extraction.Liquid chemical component such as table 8 after two sections of extraction copper
It is shown.
(5) extract de- cobalt demagging: liquid DZ272 extracts de- cobalt demagging after two sections of extraction copper.Organic phase concentration 10%, saponification rate
50%, liquid is liquid after two sections of extraction copper before extracting, and adjusting pH with nickel cobalt oxide is 6.0, compares O/A=3:1, the extraction of ten stage countercurrents.
DZ272 extracts liquid 0.00017g/L containing Co, Mg 0.0033g/L after cobalt magnesium.
(6) removing calcium with solvent extraction: DZ272 extracts liquid miscellaneous, the mainly deliming of P204 extraction after cobalt magnesium.Organic phase concentration 25%, saponification
Rate 60%, liquid is DZ272 raffinate before extracting, and adjusting pH is 4.0, compares O/A=1:3, the extraction of eight stage countercurrents.Liquid contains after P204 extraction calcium
Ca:0.0030g/L。
Final gained nickel sulfate solution ingredient is as shown in table 9.
Claims (10)
1. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail, it is characterised in that include the following steps: with low nickel matte
For the leaching of raw material nitric acid, the removing of iron can be realized by being concentrated by evaporation for leachate, except liquid uses spray pyrolysis to obtain nickel cobalt after iron
Cu oxide, sulfuric acid dissolution ambrose alloy cobalt/cobalt oxide, lysate extracts ambrose alloy separation, abstraction impurity removal, extraction Separation of nickel and cobalt, final to obtain
To pure nickel sulfate solution.
2. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail according to claim 1, it is characterised in that: in detail
It is thin that steps are as follows,
A. leach: low nickel matte material uses nitric acid normal pressure leaching, obtains the leachate of nickeliferous, copper, iron, cobalt nitrate；
B. pyrolysis removes iron: leaching solution being heated and is concentrated, until being diluted with water, ore pulp after dilution after boiling point is 130-140 DEG C
Solid-liquor separation is carried out to obtain except liquid and iron dross removing after iron；
C. pyrolysis transition: except liquid makes nitrate be decomposed into nickel cobalt Cu oxide and nitrogen oxygen in 350-550 DEG C of spray pyrolysis after iron
Compound gas；
D. sulfuric acid dissolution ambrose alloy cobalt/cobalt oxide: the oxide sulfuric acid normal-temperature dissolution after pyrolysis；
E. extract decopper(ing): sulfuric acid dissolution liquid carries out ambrose alloy separation using extraction, and alkali neutralization is not added in extraction process；Sulfuric acid dissolution
Liquid extracts copper removal, and load organic counter liquid enters electrodeposition production process；
F. extract de- cobalt demagging: liquid extracts de- cobalt demagging using Separation of nickel and cobalt extractant after extraction copper；
G. using nickel sulfate solution is obtained after removal of impurities extractant abstraction impurity removal, nickel sulfate solution can evaporative crystallization production nickel sulfate.
3. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail according to claim 2, it is characterised in that: institute
State the Ni+Cu+Co > 20% of low nickel matte material used in step a, iron content 30-50%.
4. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail according to claim 2 or 3, feature exist
In: nitric acid dosage is 0.8-1.1 times of theoretical amount in the step a, and extraction temperature is 85 DEG C -110 DEG C, the Leach reaction time
2.0-3.0h。
5. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail according to claim 4, it is characterised in that: institute
The volume ratio for stating liquid after diluting water and concentration in step b is 0.5-1.5:1.
6. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail according to claim 5, it is characterised in that: institute
Stating the oxide sulfuric acid dissolution temperature after being pyrolyzed in step d is 40-50 DEG C, and the pH of gained nickel cobalt Cu oxide dissolution terminal is
3.5-4.5。
7. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail according to claim 6, it is characterised in that: institute
Stating the extractant in step e is copper extractant DZ973N.
8. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail according to claim 7, it is characterised in that: institute
Stating Separation of nickel and cobalt extractant in step f is DZ272, and removal of impurities extractant is P204 in the step g, is used when extracting cobalt, removal of impurities
In nickel cobalt oxide and the acid of generation, nickel cobalt oxide are liquid spray pyrolysis gained after except iron after low nickel matte displacement copper removal.
9. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail according to claim 8, it is characterised in that: institute
It states in step e and extracts copper using three stage countercurrents, extraction copper compares O/A=2:1, and raffinate is liquid after one section of extraction copper, liquid after one section of extraction copper
It is divided into two parts by theoretical amount, wherein the molten process of 57.3% acid reflux, 42.7% returns neutralization step；N-process controls terminal pH
4.0, neutralization temperature is 40-50 DEG C；Liquid carries out two Duan Cuitong, three stage countercurrents after neutralization, and extraction copper compares O/A=1:1, extracts liquid after copper
For liquid after two sections of extraction copper, load is organic to return one section of extraction copper process；One section of extraction copper loads organic washing, and washing is compared O/A=6:1, washed
The molten process of water acid reflux, washing back loading is organic to enter back extraction process, and the sulfuric acid concentration of liquid is 180g/L before being stripped, before being stripped in liquid
Copper ion concentration is 30g/L, and O/A=1:1 is compared in back extraction.
10. a kind of method for producing nickel sulfate as raw material using the low nickel matte of high-speed rail according to claim 9, it is characterised in that:
Liquid extracts de- cobalt demagging after two sections of extraction copper in the step f, and liquid is liquid after two sections of extraction copper before extracting, and adjusts pH with nickel cobalt oxide and is
6.0, compare O/A=3:1, the extraction of 8-10 stage countercurrent；
The organic extraction of liquid is miscellaneous after extracting cobalt magnesium, and adjusting pH is 3.5-4.0, compares O/A=1:3, the extraction of eight stage countercurrents.
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| CN112575202A (en) * | 2020-11-17 | 2021-03-30 | 金川集团股份有限公司 | Method for purifying nickel-cobalt solution and recovering iron |
| CN113772751A (en) * | 2021-07-29 | 2021-12-10 | 广东邦普循环科技有限公司 | Method for directly preparing nickel sulfate by using low-nickel matte, nickel sulfate and application thereof |
| CN113957243A (en) * | 2021-10-22 | 2022-01-21 | 金川镍钴研究设计院有限责任公司 | Method for realizing respective open circuit of nickel, copper and iron in high-nickel matte and enriching precious metals |
| CN114657388A (en) * | 2022-03-15 | 2022-06-24 | 金川镍钴研究设计院有限责任公司 | Method for treating primary iron slag produced in nickel electrolytic refining process |
| CN114702079A (en) * | 2022-03-28 | 2022-07-05 | 广东邦普循环科技有限公司 | Method for separating and extracting nickel and iron from nickel-iron alloy |
| CN114959300A (en) * | 2022-05-27 | 2022-08-30 | 中国恩菲工程技术有限公司 | Method for comprehensively extracting nickel and copper from high nickel matte |
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| CN112575202A (en) * | 2020-11-17 | 2021-03-30 | 金川集团股份有限公司 | Method for purifying nickel-cobalt solution and recovering iron |
| CN113772751A (en) * | 2021-07-29 | 2021-12-10 | 广东邦普循环科技有限公司 | Method for directly preparing nickel sulfate by using low-nickel matte, nickel sulfate and application thereof |
| CN113772751B (en) * | 2021-07-29 | 2023-02-14 | 广东邦普循环科技有限公司 | Method for directly preparing nickel sulfate by using low-nickel matte, nickel sulfate and application thereof |
| CN113957243A (en) * | 2021-10-22 | 2022-01-21 | 金川镍钴研究设计院有限责任公司 | Method for realizing respective open circuit of nickel, copper and iron in high-nickel matte and enriching precious metals |
| CN113957243B (en) * | 2021-10-22 | 2023-10-17 | 金川镍钴研究设计院有限责任公司 | Method for realizing open circuit of nickel, copper and iron in high-nickel matte and enriching noble metals |
| CN114657388A (en) * | 2022-03-15 | 2022-06-24 | 金川镍钴研究设计院有限责任公司 | Method for treating primary iron slag produced in nickel electrolytic refining process |
| CN114702079A (en) * | 2022-03-28 | 2022-07-05 | 广东邦普循环科技有限公司 | Method for separating and extracting nickel and iron from nickel-iron alloy |
| CN114959300A (en) * | 2022-05-27 | 2022-08-30 | 中国恩菲工程技术有限公司 | Method for comprehensively extracting nickel and copper from high nickel matte |
| CN114959300B (en) * | 2022-05-27 | 2024-03-08 | 中国恩菲工程技术有限公司 | Method for comprehensively extracting nickel and copper from high nickel matte |
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