CN110117720A - A kind of method of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal - Google Patents
A kind of method of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal Download PDFInfo
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- CN110117720A CN110117720A CN201910410781.4A CN201910410781A CN110117720A CN 110117720 A CN110117720 A CN 110117720A CN 201910410781 A CN201910410781 A CN 201910410781A CN 110117720 A CN110117720 A CN 110117720A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/37—Phosphates of heavy metals
- C01B25/375—Phosphates of heavy metals of iron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/0067—Leaching or slurrying with acids or salts thereof
- C22B15/0069—Leaching or slurrying with acids or salts thereof containing halogen
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/0423—Halogenated acids or salts thereof
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
- C22B3/384—Pentavalent phosphorus oxyacids, esters thereof
- C22B3/3846—Phosphoric acid, e.g. (O)P(OH)3
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of methods of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal, this method be by sulfate slag and phosphoric acid and sodium carbonate-sodium fluoride compound additive after mixing, it is placed in air atmosphere and carries out oxidizing roasting, product of roasting carries out mill leaching using phosphoric acid,diluted after broken, is separated by solid-liquid separation, gained solid product is by washing, up to phosphate dihydrate iron, after gained leachate adjusts pH value to faintly acid, the valuable metals such as copper, cobalt and nickel are recycled in extraction and separation；This method is efficiently comprehensive to extract the valuable metals such as iron, copper, cobalt and nickel in sulfate slag, and this method is easy to operate, production cost is low, environmental-friendly, meets industrialization production requirements.
Description
Technical field
The present invention relates to a kind of sulfate slag processing methods, in particular to sulfate slag are passed through phosphorylation roasting-leaching-extraction
The efficiently comprehensive method for extracting the valuable metals such as iron, copper, cobalt and nickel, belongs to mineral processing and nonferrous metallurgy field.
Background technique
Sulfate slag, also known as pyrite cinder are to produce the industrial residue generated in sulfuric acid process.Containing abundant in sulfate slag
Iron and the elements such as part calcium, silicon, copper, sulphur, but non-ferrous metal content is low in sulfate slag, metalliferous mineral and gangue mineral are mutual
Package, the comprehensive utilization of sulfate slag are restricted.Chinese about 80,000,000 tons of sulfate slags of discharge, national proved reserve every year cross hundred million
Ton.The accumulation of a large amount of sulfate slags wastes land resource, and causes serious pollution to environment.Currently, the comprehensive benefit of sulfate slag
With approach primarily as the raw material of agglomerates of sintered pellets.However, this method is only applicable to the higher sulfate slag of certain Iron grades, China
Most of sulfate slag Iron grade is low, it is difficult to meet the requirement of agglomerates of sintered pellets factory.In order to improve the grade of sulfate slag, generally use straight
The method of selecting mine handles sulfate slag, due in pyrite cinder metal and gangue be mosaic texture, further increase iron product
Position has difficulties, and limits the utilization of sulfate slag.
Ferric phosphate lithium cell has the advantages such as excellent charge-discharge performance, longer service life, preferable thermal stability,
Thus occupy the important market share in the market.Ferric phosphate is to prepare one of most important raw material of ferric phosphate, preparation method
Mainly solution synthetic method is that raw material reacts to form phosphate dihydrate iron using molysite and phosphoric acid.But existing ferric phosphate prepares work
Skill higher cost needs good iron material, and wet synthetic technology production efficiency is low, the high requirements on the equipment.
Summary of the invention
For exist in the prior art sulfate slag comprehensive utilization, increment processing technology economic value it is low the problems such as, the present invention
First purpose be to provide it is a kind of comprehensive using phosphorylation roasting, phosphoric acid leaches, extraction and separation combine process efficient
The method for extracting the valuable metals such as iron, copper, cobalt and nickel in sulfate slag is closed, this method is easy to operate, production cost is low, environment is friendly
It is good, meet industrialization production requirements.
In order to achieve the above technical purposes, the present invention provides a kind of sulfate slag phosphorylation roasting-leaching-extraction synthesis to mention
The method for taking valuable metal, this method be by sulfate slag and phosphoric acid and sodium carbonate-sodium fluoride compound additive after mixing, set
Oxidizing roasting is carried out in air atmosphere, product of roasting carries out mill leaching using phosphoric acid,diluted after broken, is separated by solid-liquid separation, gained
Solid product by washing to get phosphate dihydrate iron, after gained leachate adjusts pH value to faintly acid, extraction and separation copper, cobalt and
Nickel.
Preferred scheme, the sodium carbonate-sodium fluoride compound additive by sodium carbonate and sodium fluoride in mass ratio (75~
90): (25~10) composition.The sodium carbonate that the present invention uses-sodium fluoride compound additive is mainly used for destroying in the middle part of sulfate slag
Divide iron, copper, nickel, cobalt/cobalt oxide to form complex oxide in conjunction with the silicon in sulfate slag, its lattice can not be destroyed under normal condition,
And the destruction of these check mineral lattices can be strengthened using sodium carbonate-sodium fluoride compound additive, promote the phosphorus of these metals
It is acidizing fired.In preferred proportional region, it is more advantageous to the phosphorylation roasting effect for improving sulfate slag.
Preferred scheme, phosphoric acid and sulfate slag are according to ferrophosphorus molar ratio (1.02~1.20): 1 ingredient.In preferred ratio
It can guarantee the abundant phosphorylation of iron in range.
Preferred scheme, sodium carbonate-sodium fluoride compound additive quality are the 1.0~3.5% of sulfate slag quality.Preferred
Proportional region in may advantageously facilitate by the gangue minerals such as silicate wrap up metal dissociation and conversion.
Preferred scheme, the temperature of the oxidizing roasting are 300~500 DEG C, and calcining time is 1.5~3.5h.Preferred
Roasting condition realize sulfate slag in various metals be rapidly converted into phosphate.
Preferred scheme, the pH of the phosphoric acid,diluted are 1.0~2.0.The phosphoric acid that debita spissitudo is used during grinding leaching, can
To make full use of phosphate solubility property difference in phosphoric acid,diluted, the Selective separation-out of phosphate dihydrate iron is realized.
Preferred scheme, the condition of the mill leaching are as follows: liquid-solid ratio is 1~1.5mL:1g, and grinding fineness is less than for 100%
0.037mm。
Preferred scheme, the solid product is by being washed to pH greater than 6.
Preferred scheme, the leachate adjust pH value to 4.5~6.PH is adjusted using conventional alkaline solution, such as ammonium hydroxide
Deng.
Preferred scheme, the extractant that the extraction separation process uses includes at least one of P204, P507.
Preferred scheme, the condition of the extraction and separation are as follows: in organic phase the concentration of volume percent of extractant be 2~
5%, diluent is kerosene；Water phase/oil phase volume ratio is 1~3.5:1, and extraction temperature is room temperature, extraction time is 30~
60min。
Sulfate slag of the invention is the waste residue handled by high temperature oxidation roasting, and wherein iron is mainly with bloodstone (three oxidations
Two iron) form exist, other valuable metals such as copper, nickel, cobalt etc. mostly in the form of an oxide or doped forms enter iron oxidation
Object lattice, and silicon, aluminium element primarily form silicate and aluminate etc., and close embedding cloth and mutually package relationship is presented, in addition, sulphur
Also contain a small amount of sulfate and sulfide in acid sludge.To realize, various valuable metals sufficiently divide with impurity element in sulfate slag
From, the present invention by using phosphoric acid and sodium carbonate-sodium fluoride compound additive collective effect, is roasted first by phosphorylation,
Most mineral lattices in sulfate slag are destroyed, promote ferriferous oxide to be converted into ferric phosphate, copper, nickel, cobalt are converted into corresponding phosphorus
Hydrochlorate；Especially part iron, copper, nickel, cobalt/cobalt oxide form complex oxide in conjunction with the silicon in sulfate slag in sulfate slag, conventional
Under the conditions of can not destroy its lattice, and such oxidase complex can be strengthened under the action of sodium carbonate-sodium fluoride compound additive
The destruction of object lattice and it may advantageously facilitate metal tripolyphosphate.After phosphorylation roasting process completes conversion, pass through regulation mill leaching
Process condition is acted on by grinding process mechanical force activating, strengthens copper, nickel, the phosphatic leaching of cobalt in product of roasting, and herein
Process does not dissolve in phosphoric acid,diluted by control phosphoric acid concentration, using ferric phosphate, is still stabilized, to ensure that phosphate dihydrate iron
With efficiently separating for the metals such as copper, cobalt, nickel.After being simply separated by solid-liquid separation, obtains solid phase phosphoric acid iron product and copper, nickel, cobalt are rich
Liquid collecting efficiently separates recycling copper, nickel, cobalt in conjunction with organic extraction techniques from solution.To realize valuable gold in sulfate slag
The abundant resource utilization belonged to.
Compared with the prior art, technical solution of the present invention bring the utility model has the advantages that
1) technique of the invention combined using phosphorylation roasting-phosphoric acid,diluted leaching-extraction phase, is realized in sulfate slag
The valuable metals synthetical recovery such as iron, copper, cobalt, nickel, makes sulfate slag obtain resource utilization.The present invention is valuable with cupric, nickel, cobalt
The sulfate slag of metal is process object, and the phosphorylation of iron in sulfate slag, copper, cobalt, nickel, then benefit may be implemented by phosphorylation roasting
With various phosphate in phosphoric acid,diluted the characteristics of different solubility, Selective separation-out ferric phosphate further uses extraction and separation
Technique recycle copper, cobalt, nickel, realize sulfate slag comprehensive utilization value increasing processing, iron, copper, cobalt, nickel the rate of recovery be above 90%,
There is higher economic value compared to conventional method.
Method provided by the invention is easy to operate, low energy consumption, at low cost, it is easy to accomplish industrialized production is realizing sulfuric acid
Solid waste comprehensive utilization is realized while slag increment processing.
Detailed description of the invention
Process flow chart Fig. 1 of the invention.
Specific embodiment
Following embodiment is intended to further illustrate the content of present invention, rather than limits the protection model of the claims in the present invention
It encloses.
Comparative example 1:
With certain sulfate slag in sulfuric acid plant (Iron grade 56.3%, copper, cobalt, nickel content be respectively 0.6%, 0.3%, 0.4%) be
Raw material, according to ferrophosphorus ratio 1.02:1 with addition of phosphoric acid, according to sulfate slag quality 3.5% with addition of compound sodium salt, the group of compound sodium salt
As sodium carbonate: sodium fluoride ratio is 75:25；Then it will mix and expect to carry out oxidizing roasting, 500 DEG C of maturing temperature, calcining time
For 1.5h, calcination atmosphere is air；It is crushed after roasting, is then leached, leaching liquid-solid ratio is 5:1, leachate
For the phosphoric acid solution of pH=1.0, it is separated by solid-liquid separation after leaching；It is washed with distilled water solid product and is greater than to cleaning solution pH
6, phosphate dihydrate iron product is obtained, ferric phosphate purity is 92.1%, and iron recovery 92.3%, wherein copper, cobalt, nickel content are high
In 0.1%；Using ammonium hydroxide adjust pH of leaching solution be 6, then using organic extractant to valuable metal ions in leachate into
Row extraction, extraction conditions are as follows: extractant P204 concentration is 2%, and diluent is kerosene, and water phase/oil is comparably 3.5:1, extraction temperature
Degree is room temperature, extraction time 30min, entire process flow copper, cobalt, nickel valuable element the rate of recovery be respectively 63.1%,
65.1% and 58.6%.
Comparative example 2
With certain sulfate slag in sulfuric acid plant (Iron grade 56.3%, copper, cobalt, nickel content be respectively 0.6%, 0.3%, 0.4%) be
Raw material, according to ferrophosphorus ratio 1.1:1 with addition of phosphoric acid, according to sulfate slag quality 3.5% with addition of carbonic acid sodium additives；Then it will mix
Material carries out oxidizing roasting, and 450 DEG C of maturing temperature, calcining time 1.5h, calcination atmosphere is air；It is broken after roasting
It is broken, mill leaching is then carried out, mill leaching liquid-solid ratio is 1:1, and ore grinding solution is the phosphoric acid solution of pH=1.0, and grinding fineness is 100% small
It is separated by solid-liquid separation after 0.037mm, ore grinding；It is washed with distilled water solid product and is greater than 6 to cleaning solution pH, obtain two water
Phosphoric acid iron product, ferric phosphate purity are 97.7%, and iron recovery 93.6%, wherein copper, cobalt, nickel content are above 0.1%；Make
Adjusting pH of leaching solution with ammonium hydroxide is 6, is then extracted, is extracted to valuable metal ions in leachate using organic extractant
Condition are as follows: extractant P204 concentration is 5%, and water phase/oil is comparably 1:1, extraction temperature is room temperature, extraction time 60min, whole
A process flow copper, cobalt, nickel valuable element the rate of recovery be respectively 76.3%, 70.3% and 68.3%.
Embodiment 1:
With certain sulfate slag in sulfuric acid plant (Iron grade 56.3%, copper, cobalt, nickel content be respectively 0.6%, 0.3%, 0.4%) be
Raw material, according to ferrophosphorus ratio 1.02:1 with addition of phosphoric acid, according to sulfate slag quality 3.5% with addition of compound sodium salt, the group of compound sodium salt
As sodium carbonate: sodium fluoride ratio is 75:25；Then it will mix and expect to carry out oxidizing roasting, 500 DEG C of maturing temperature, calcining time
For 1.5h, calcination atmosphere is air；It is crushed after roasting, then carries out mill leaching, mill leaching liquid-solid ratio is 1:1, and ore grinding is molten
Liquid is the phosphoric acid solution of pH=1.0, and grinding fineness is less than 0.037mm for 100%, is separated by solid-liquid separation after ore grinding；With steaming
Distilled water washs solid product and is greater than 6 to cleaning solution pH, obtains phosphate dihydrate iron product, and ferric phosphate purity is 98.7%, iron recycling
Rate is 91.3%, and wherein copper, cobalt, nickel content are below 0.005%；Adjusting pH of leaching solution using ammonium hydroxide is 6, then using having
Machine extractant extracts valuable metal ions in leachate, extraction conditions are as follows: extractant P204 concentration is 2%, diluent
Kerosene, water phase/oil is comparably 3.5:1, extraction temperature is room temperature, extraction time 30min, and entire process flow copper, cobalt, nickel have
The rate of recovery of valence element is respectively 94.3%, 96.0% and 92.1%.
Embodiment 2:
With certain sulfate slag in sulfuric acid plant (Iron grade 56.3%, copper, cobalt, nickel content be respectively 0.6%, 0.3%, 0.4%) be
Raw material, according to ferrophosphorus ratio 1.20:1 with addition of phosphoric acid, according to sulfate slag quality 1.0% with addition of compound sodium salt, the group of compound sodium salt
As sodium carbonate: sodium fluoride ratio is 90:10；Then it will mix and expect to carry out oxidizing roasting, 300 DEG C of maturing temperature, calcining time
For 3.5h, calcination atmosphere is air；It is crushed after roasting, then carries out mill leaching, mill leaching liquid-solid ratio is 1.5:1, ore grinding
Solution is the phosphoric acid solution of pH=1.5, and grinding fineness is less than 0.037mm for 100%, is separated by solid-liquid separation after ore grinding；With
It distills water washing solid product and is greater than 6 to cleaning solution pH, obtain phosphate dihydrate iron product, ferric phosphate purity is 99.0%, and iron returns
Yield is 92.1%, and wherein copper, cobalt, nickel content are below 0.005%；Adjusting pH of leaching solution using ammonium hydroxide is 4.5, is then made
Valuable metal ions in leachate are extracted with organic extractant, extraction conditions are as follows: extractant P507 concentration is 5%, dilute
Agent kerosene is released, water phase/oil is comparably 1:1, extraction temperature is room temperature, extraction time 30min, entire process flow copper, cobalt, nickel
The rate of recovery of valuable element is respectively 92.0%, 93.2% and 94.5%.
Embodiment 3:
With certain sulfate slag in sulfuric acid plant (Iron grade 60.6%, copper, cobalt, nickel content be respectively 0.5%, 0.5%, 0.6%) be
Raw material, according to ferrophosphorus ratio 1.10:1 with addition of phosphoric acid, according to sulfate slag quality 2.0% with addition of compound sodium salt, the group of compound sodium salt
As sodium carbonate: sodium fluoride ratio is 83:17；Then it will mix and expect to carry out oxidizing roasting, 300 DEG C of maturing temperature, calcining time
For 3h, calcination atmosphere is air；It is crushed after roasting, then carries out mill leaching, mill leaching liquid-solid ratio is 1.3:1, and ore grinding is molten
Liquid is the phosphoric acid solution of pH=1.5, and grinding fineness is less than 0.037mm for 100%, is separated by solid-liquid separation after ore grinding；With steaming
Distilled water washs solid product and is greater than 6 to cleaning solution pH, obtains phosphate dihydrate iron product, and ferric phosphate purity is 98.6%, iron recycling
Rate is 90.3%, and wherein copper, cobalt, nickel content are below 0.005%；Adjusting pH of leaching solution using ammonium hydroxide is 5, then using having
Machine extractant extracts valuable metal ions in leachate, extraction conditions are as follows: extractant (P204 and P507 ratio is 1:1)
Concentration is 3%, diluent kerosene, and water phase/oil is comparably 2:1, extraction temperature is room temperature, extraction time 30min, entire technique
Process copper, cobalt, nickel valuable element the rate of recovery be respectively 90.8%, 91.8% and 92.1%.
Embodiment 4:
With certain sulfate slag in sulfuric acid plant (Iron grade 60.6%, copper, cobalt, nickel content be respectively 0.5%, 0.5%, 0.6%) be
Raw material, according to ferrophosphorus ratio 1.15:1 with addition of phosphoric acid, according to sulfate slag quality 3.0% with addition of compound sodium salt, the group of compound sodium salt
As sodium carbonate: sodium fluoride ratio is 88:12；Then it will mix and expect to carry out oxidizing roasting, 400 DEG C of maturing temperature, calcining time
For 2.5h, calcination atmosphere is air；It is crushed after roasting, then carries out mill leaching, mill leaching liquid-solid ratio is 1.3:1, ore grinding
Solution is the phosphoric acid solution of pH=1.5, and grinding fineness is less than 0.037mm for 100%, is separated by solid-liquid separation after ore grinding；With
It distills water washing solid product and is greater than 6 to cleaning solution pH, obtain phosphate dihydrate iron product, ferric phosphate purity is 99.2%, and iron returns
Yield is 92.0%, and wherein copper, cobalt, nickel content are below 0.005%；Adjusting pH of leaching solution using ammonium hydroxide is 5, is then used
Organic extractant extracts valuable metal ions in leachate, extraction conditions are as follows: extractant (P204 and P507 ratio is 2:
1) concentration is 2%, and diluent kerosene, water phase/oil is comparably 2.5:1, extraction temperature is room temperature, extraction time 60min, entirely
Process flow copper, cobalt, nickel valuable element the rate of recovery be respectively 91.1%, 92.3% and 90.9%.
Claims (10)
1. a kind of method of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal, it is characterised in that: by sulfuric acid
Slag and phosphoric acid and sodium carbonate-sodium fluoride compound additive after mixing, are placed in air atmosphere and carry out oxidizing roasting, and roasting produces
Object carries out mill leaching using phosphoric acid,diluted after broken, is separated by solid-liquid separation, gained solid product by washing to get phosphate dihydrate iron,
After gained leachate adjusts pH value to faintly acid, extraction and separation copper, cobalt and nickel.
2. a kind of side of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal according to claim 1
Method, it is characterised in that: the sodium carbonate-sodium fluoride compound additive is by sodium carbonate and sodium fluoride (75~90) in mass ratio: (25
~10) it forms.
3. a kind of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal according to claim 1 or 2
Method, it is characterised in that:
Phosphoric acid and sulfate slag are according to ferrophosphorus molar ratio (1.02~1.20): 1 ingredient；
Sodium carbonate-sodium fluoride compound additive quality is the 1.0~3.5% of sulfate slag quality.
4. a kind of side of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal according to claim 1
Method, it is characterised in that: the temperature of the oxidizing roasting is 300~500 DEG C, and calcining time is 1.5~3.5h.
5. a kind of side of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal according to claim 1
Method, it is characterised in that: the pH of the phosphoric acid,diluted is 1.0~2.0.
6. a kind of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal according to claim 1 or 5
Method, it is characterised in that: the condition of the mill leaching are as follows: liquid-solid ratio is 1~1.5mL:1g, and grinding fineness is less than for 100%
0.037mm。
7. a kind of side of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal according to claim 1
Method, it is characterised in that: the solid product is by being washed to pH greater than 6.
8. a kind of side of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal according to claim 1
Method, it is characterised in that: the leachate adjusts pH value to 4.5~6.
9. a kind of side of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal according to claim 1
Method, it is characterised in that: the extractant that the extraction separation process uses includes at least one of P204, P507.
10. a kind of sulfate slag phosphorylation roasting-leaching-extraction comprehensive extraction of valent metal according to claim 1 or described in 9
Method, it is characterised in that: the condition of the extraction and separation are as follows: the concentration of volume percent of extractant is 2~5% in organic phase,
Diluent is kerosene；Water phase/oil phase volume ratio is 1~3.5:1, and extraction temperature is room temperature, and extraction time is 30~60min.
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| CN111057837A (en) * | 2020-01-16 | 2020-04-24 | 衢州华友钴新材料有限公司 | Low-temperature roasting treatment method for cobalt hydrometallurgy waste residues |
| CN111394595A (en) * | 2020-04-17 | 2020-07-10 | 中南大学 | Method for extracting nickel and cobalt from phosphoric acid leaching solution of laterite-nickel ore |
| CN114421044A (en) * | 2022-01-29 | 2022-04-29 | 湖南裕能新能源电池材料股份有限公司 | Purification treatment method and system for phosphorus-iron slag mixture containing Al and Cu impurities |
| CN114604837A (en) * | 2022-03-30 | 2022-06-10 | 湖北宇浩高科新材料有限公司 | Preparation method of iron phosphate and preparation method of lithium iron phosphate |
| CN115261610A (en) * | 2022-08-03 | 2022-11-01 | 中国科学院赣江创新研究院 | Method for separating rare earth elements and transition metal elements in waste nickel-metal hydride batteries |
| CN115806280A (en) * | 2022-12-12 | 2023-03-17 | 中南大学 | Method for preparing iron phosphate by taking phosphorus iron powder as byproduct of phosphorus chemical industry as raw material |
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| CN111394595A (en) * | 2020-04-17 | 2020-07-10 | 中南大学 | Method for extracting nickel and cobalt from phosphoric acid leaching solution of laterite-nickel ore |
| CN111394595B (en) * | 2020-04-17 | 2021-04-23 | 中南大学 | Method for extracting nickel and cobalt from phosphoric acid leaching solution of laterite-nickel ore |
| CN114421044A (en) * | 2022-01-29 | 2022-04-29 | 湖南裕能新能源电池材料股份有限公司 | Purification treatment method and system for phosphorus-iron slag mixture containing Al and Cu impurities |
| CN114604837A (en) * | 2022-03-30 | 2022-06-10 | 湖北宇浩高科新材料有限公司 | Preparation method of iron phosphate and preparation method of lithium iron phosphate |
| CN115261610A (en) * | 2022-08-03 | 2022-11-01 | 中国科学院赣江创新研究院 | Method for separating rare earth elements and transition metal elements in waste nickel-metal hydride batteries |
| CN115261610B (en) * | 2022-08-03 | 2023-08-22 | 中国科学院赣江创新研究院 | Method for separating rare earth element and transition metal element in waste nickel-metal hydride battery |
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| CN115806280B (en) * | 2022-12-12 | 2024-01-26 | 中南大学 | Method for preparing ferric phosphate by taking phosphorus chemical byproduct ferrophosphorus powder as raw material |
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