CN110358933A - A kind of method of the dense solid-liquor separation of zinc hydrometallurgy ore pulp - Google Patents
A kind of method of the dense solid-liquor separation of zinc hydrometallurgy ore pulp Download PDFInfo
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- CN110358933A CN110358933A CN201910763364.8A CN201910763364A CN110358933A CN 110358933 A CN110358933 A CN 110358933A CN 201910763364 A CN201910763364 A CN 201910763364A CN 110358933 A CN110358933 A CN 110358933A
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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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
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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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/26—Refining solutions containing zinc values, e.g. obtained by leaching zinc ores
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
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Abstract
The invention discloses a kind of methods of dense solid-liquor separation of zinc hydrometallurgy ore pulp, belong to Zinc Hydrometallurgy Technology field.The method of the dense solid-liquor separation of zinc hydrometallurgy ore pulp provided by the invention suitably reduces pulp density by using the method for zinc hydrometallurgy solution reflux dilution, optimize flocculant adding manner, to improve zinc hydrometallurgy ore pulp flocculation settling velocity, solve the problem of to leach that pulp liquid-solid isolation clarifying effect is poor, flocculation settling velocity is slow especially solves that the sedimentation and separation property that high-silicon type zinc concentrate is generated because generating silica gel is poor, supernatant race mixes low yield.Technique described in the method is easily achieved, simple and effective, and sinking speed is greatly improved, and can reduce concentrator volume, reduces investment, and solution is clarified after dense sedimentation separation, is conducive to operate in next step.
Description
Technical field
The invention belongs to Zinc Hydrometallurgy Technology fields, are related to a kind of method of the dense solid-liquor separation of zinc hydrometallurgy ore pulp.
Background technique
With the development of all kinds of industries, zinc scope of use constantly expands, and zinc product consumption increases year by year, high-quality, Gao Pin
The insufficient supply increasingly of position zinc sulfide ore resource, the recycling and utilization of the non-traditional zinc resource such as high willemite, zinc oxide ore are got over
To be more taken seriously.The main problem of the high willemite of wet-treating is to contain a large amount of element silicons in ore.Silica is in ore
It is dissolved out when leaching, colloidal sol or even gel easy to form, this brings great difficulty to sedimentation and filter operation.And solve this
The cardinal principle of problem can be attributed to two aspects: how avoid or prevent as far as possible the formation of silica solution when i.e. ore leaches；And
After colloidal sol is formed in ore pulp, how to promote its effective sedimentation separation, improves strainability.China researcher surrounds tissue silicon
The formation of colloidal sol has carried out more research, rarely has research around the problem of improving settling ore pulp strainability.
In traditional zinc hydrometallurgy, leaches ore pulp separation and use concentrator clarified separation, mostly not using ore pulp after leaching
Be directly entered concentrator through dilution, exist leach pulp liquid-solid isolation clarifying effect is poor, flocculation settling velocity slowly, concentrator volume
The problems such as bigger than normal, investment increases.For handling high-silicon type zinc concentrate, with traditional direct sedimentation process of concentrator raw ore slurry, by
In generate silica gel will lead to the problem of more serious solid-liquor separation, it is muddy that serious person causes dense supernatant to run, and liquid increases containing object is consolidated, on
Clear liquid weight deteriorates, or even can not produce supernatant liquid containing zinc in qualification, causes wet production that cannot continue the problem of carrying out.
CN104674024A discloses dense solid separation method in a kind of zinc hydrometallurgy solution of raising clarifying effect.It is logical
The physical state using optimization roasted ore is crossed, it is appropriate to increase calcining granularity, solvable silicon and iron content are reduced, feed slurry liquid is increased
Gu ratio improves slurry temperature, optimizes flocculant operating method and change the joint step of 3# agent polyacrylamide addition point to mention
High dense clarifying effect.
CN108796218A describes a kind of method for improving solution strainability in zinc hydrometallurgy.Method includes: low
In Ore Leaching reaction process, the liquid-solid ratio for controlling acid solution and ZnO is 5:1, and the concentration of acid solution is 115~125g/L, is being controlled
The temperature of relieving haperacidity solution is 75~85 DEG C, and silicon flocculating agent is added into acid solution according to 0.2~0.5g/L, reacts 1~2h, reaction
At the end of endpoint pH be 1~3, then filter.
Southwestern China mountain of papers area and Xinjiang southwest Wuqia area are contained high willemite resource abundant, wherein mountain of papers
There is a large amount of high silica zinc oxide ore in area, and there is high silicon zinc sulfide ore resource abundant in Wuqia area.High-silicon type zinc ore is soaked with conventional method
Technique leaches the problem to form silica gel influence solid-liquor separation there are silica out.
Summary of the invention
The present invention has selected a kind of suitable ore pulp flocculation aiming at the problem that generation of ore pulp silica solution influences settling property
Subsidence style solves the problems, such as to leach the solid-liquor separation to form silica gel because of silica.
It is an object of the present invention to provide a kind of method of dense solid-liquor separation of zinc hydrometallurgy ore pulp, this method can be developed
The high willemite resource abundant contained using Southwestern China mountain of papers area and Xinjiang southwest Wuqia area and other areas.The party
Method can solve the problems, such as that the sedimentation and separation property that high-silicon type zinc concentrate is generated because generating silica gel is poor, supernatant runs mixed low yield.
Technique described in the method is easily achieved, simple and effective.The purpose of the present invention is achieved through the following technical solutions.
A kind of method of the dense solid-liquor separation of zinc hydrometallurgy ore pulp, which comprises the following steps:
(1) zinc hydrometallurgy ore pulp is uniformly mixed with flocculant；
(2) enter concentrator and carry out dense sedimentation, obtain supernatant and leach underflow；
(3) part supernatant is back to step (1), zinc hydrometallurgy ore pulp is diluted.
Further, step (3) the part supernatant accounts for the 10~50% of whole supernatants.
Further, step (1) the zinc hydrometallurgy ore pulp includes neutral leaching ore pulp and Weak-acid leaching ore pulp.
Further, step (1) flocculant is polyacrylamide flocculant.
Further, polyacrylamide flocculant concentration is 0.05~0.1%, and dosage is 20~200g/t (dry weight
Meter).
Further, step (1) the zinc hydrometallurgy ore pulp and flocculant are evenly mixed in the progress of concentrator inlet.
Further, dense motor spindle described in step (2) is equipped with the rake of microrunning, and revolving speed is 1/5~1/3r/
min。
Wherein, the step is related to following reaction principle:
Sulfuric acid reaction contained in silicate contained by calcining and oxidation solution in leaching process, formed solvable silicon enter it is molten
Liquid.Silicic acid three kinds of kenel α types, β type and γ type in the solution have certain equilibrium relation between them.In acid solution, gather
Conjunction mechanism is that single silicic acid is first mutually polymerized to oligomeric state silicic acid in solution, and then oligomeric state silicic acid and single silicic acid polymerization are high poly- state
Silicic acid.When conditions change, this balance will be destroyed and occur the conversion of kenel.Silicic acid polymerization degree can be with temperature in solution
The conditions such as degree, concentration, electrolyte are gradually increased, and form bulky, the hydrogel of loose network structure, and then it is heavy to deteriorate ore pulp
Drop and strainability.
Based on the above principles, the present invention passes through the method for supernatant reflux dilution, changes solution and ore particles in ore pulp
Between contact tacky state.Meanwhile extremely low silicon concentration is controlled by reflux dilution, it is greater than the reaction quotient Q of above-mentioned reaction
Reaction equilibrium constant K reacts reverse spontaneous progress at this time, i.e. generation poly silicic acid depolymerization reaction, poly silicic acid loses original knot
Structure generates the free silicic acid such as single silicic acid, so that settling ore pulp performance is greatly improved.
It is a further object of the present invention to provide a kind of high willemite smelting processes, using a kind of wet process refining provided by the invention
The method that zinc ore starches dense solid-liquor separation, so that the high smooth solid-liquor separation of willemite ore pulp, realizes that the smelting of zinc is extracted.The present invention
Purpose be achieved through the following technical solutions.
A kind of high willemite smelting process, which comprises the following steps:
(1) it roasts high willemite to obtain zinc calcine；
(2) zinc calcine neutrality is leached using conventional wet lay zinc metallurgy process, control ore pulp endpoint pH is 4.8~5.4, is obtained
Ore pulp is leached to neutrality；
(3) neutrality is leached into ore pulp and neutral leaching is obtained by flocculating setting using the dense solid-liquor separation of method of the invention
Supernatant and neutral leaching underflow out；
(4) the neutral supernatant purifying electrolysis that leaches other than reflux is obtained into zinc product；
(5) neutrality is leached into underflow and Weak-acid leaching is carried out using conventional wet lay zinc metallurgy process, control ore pulp endpoint pH is
2.5~3.5；Obtain Weak-acid leaching ore pulp；
(6) Weak-acid leaching ore pulp is obtained into low acidleach by flocculating setting using the dense solid-liquor separation of method of the invention
Supernatant and Weak-acid leaching underflow out；
(7) low sour underflow is subjected to filters pressing, obtains Weak-acid leaching liquid and Weak-acid leaching slag.
Further, zinc calcine particle described in step (1) is not less than 70% in 200 mesh accounting below.
Further, dense solid-liquor separation described in step (3) and step (6) directly carries out after leaching, ore pulp temperature
40-90 DEG C of degree, flocculating setting time are no less than 30min.
Further, underflow density is not less than 15% after step (3) and step (6) flocculating setting.
Further, it is not low in 200 mesh accounting below to leach contained solid impurity particle in underflow for neutrality described in step (3)
In 50%.
Further, Weak-acid leaching slag moisture content described in step (7) is no more than 20%.
The invention has the following advantages that
(1) it can be used for developing and using the non-traditional high willemite resource such as high-silicon type zinc concentrate or zinc oxide ore.
(2) solid-liquor separation problem caused by silica gel in leaching is solved.
(3) technique is easily achieved, simple and effective, and sinking speed is greatly improved, and can reduce concentrator volume, is reduced and is thrown
Money, solution is clarified after dense sedimentation separation, is conducive to operate in next step.
Specific embodiment
Embodiment 1: the coloured high silicate zinc concentrate wet-leaching pulp liquid-solid isolation of Xinjiang Zijin
Sample ore is the coloured high silicate zinc concentrate of Xinjiang Zijin, contains silica 8%, and after fluidized bed roasting, calcining is using conventional
Flowsheet of wet zinc smelting carries out neutral leaching, and middle leaching ore pulp pulp density is 9%, and middle leaching slurry pH is 5.31, silicon leaching rate
12%；Middle leaching ore pulp enters concentrator, and leaching ore pulp is dense in 45% return of the middle leaching dense overflow supernatant soln amount of settling ore pulp
Close machine carries out so that middle leaching pulp density is diluted to 4.5%, while polyacrylamide flocculant being added, dosage is from diluting
60g/t, middle leaching ore pulp flocculating setting instantaneous velocity are up to 3m/h or more, and thickened underflow concentration is up to 31%, supernatant yield
86%；Middle leaching thickened underflow Weak-acid leaching, low leaching ore pulp enter concentrator, the low dense overflow supernatant soln amount of leaching settling ore pulp
40% return to low leaching ore pulp concentrator and carry out from dilution, while polyacrylamide flocculant is added, dosage 80g/t is low
Leaching ore pulp flocculating setting instantaneous velocity is up to 12m/h or more, and ore pulp flocculating settling characteristics are excellent.
Embodiment 2: Yunnan mountain of papers area high silica zinc oxide ore wet-leaching pulp liquid-solid isolation
Sample ore is Yunnan mountain of papers area high silica zinc oxide ore raw ore, contains silica 25%, using conventional wet lay zinc metallurgy stream
Cheng Jinhang neutrality leaches, and middle leaching ore pulp pulp density is 9%, and middle leaching slurry pH is 5.30；Middle leaching ore pulp enters concentrator, in
Leaching ore pulp concentrator in 50% return of the dense overflow supernatant soln amount of settling ore pulp is soaked to carry out from diluting, so that middle leaching ore pulp
Polyacrylamide flocculant is added to 4% in concentration dilution, dosage 100g/t, middle leaching ore pulp flocculating setting, that is, speed per hour
Degree is up to 3m/h or more, and thickened underflow concentration is up to 23%, supernatant yield 73%；Middle leaching thickened underflow Weak-acid leaching, low leaching
Ore pulp enters concentrator, and the 40% of the low leaching dense overflow supernatant soln amount of settling ore pulp returns to low leaching ore pulp concentrator and carries out certainly
Dilution, while polyacrylamide flocculant is added, dosage 100g/t, low leaching ore pulp flocculating setting instantaneous velocity is up to
8m/h or more, ore pulp flocculating settling characteristics are excellent.
Embodiment 3: Xinjiang Jin Wang mining industry wet-leaching pulp liquid-solid isolation
Sample ore is Xinjiang Jin Wang mining industry high silicate zinc concentrate, contains silica 1 0.8%, and after fluidized bed roasting, calcining is using normal
It advises flowsheet of wet zinc smelting and carries out neutral leaching, middle leaching ore pulp pulp density is 9%, and middle leaching slurry pH is 5.24, silicon leaching rate
14%；Middle leaching ore pulp enters concentrator, and leaching ore pulp is dense in 50% return of the middle leaching dense overflow supernatant soln amount of settling ore pulp
Close machine carries out so that middle leaching pulp density is diluted to 4%, while polyacrylamide flocculant being added, dosage is from diluting
80g/t, middle leaching ore pulp flocculating setting instantaneous velocity are up to 3m/h or more, and thickened underflow concentration is up to 27%, supernatant yield
80%；Middle leaching thickened underflow Weak-acid leaching, low leaching ore pulp enter concentrator, the low dense overflow supernatant soln amount of leaching settling ore pulp
40% return to low leaching ore pulp concentrator and carry out from dilution, while polyacrylamide flocculant is added, dosage 80g/t is low
Leaching ore pulp flocculating setting instantaneous velocity is up to 10m/h or more, and ore pulp flocculating settling characteristics are excellent.
Claims (13)
1. a kind of method of the dense solid-liquor separation of zinc hydrometallurgy ore pulp, which comprises the following steps:
(1) zinc hydrometallurgy ore pulp is uniformly mixed with flocculant；
(2) enter concentrator and carry out dense sedimentation, obtain supernatant and leach underflow；
(3) part supernatant is back to step (1), zinc hydrometallurgy ore pulp is diluted.
2. the method according to claim 1, wherein step (3) the part supernatant accounts for whole supernatants
10~50%.
3. the method according to claim 1, wherein step (1) the zinc hydrometallurgy ore pulp includes neutral leaches
Ore pulp and Weak-acid leaching ore pulp.
4. the method according to claim 1, wherein step (1) flocculant is polyacrylamide flocculation
Agent.
5. according to the method described in claim 4, it is characterized in that, polyacrylamide flocculant concentration be 0.05~0.1%,
Dosage is 20~200g/t (dry weight meter).
6. the method according to claim 1, wherein step (1) the zinc hydrometallurgy ore pulp and flocculant are uniform
It is blended in the progress of concentrator inlet.
7. the method according to claim 1, wherein dense motor spindle described in step (2) is equipped with and transports at a slow speed
The rake turned, revolving speed are 1/5~1/3r/min.
8. a kind of high willemite smelting process, which comprises the following steps:
(1) it roasts high willemite to obtain zinc calcine；
(2) zinc calcine neutrality is leached using conventional wet lay zinc metallurgy process, control ore pulp endpoint pH is 4.8~5.4, is obtained
Property leach ore pulp；
(3) neutrality is leached into ore pulp and uses the dense solid-liquor separation of method as claimed in any one of claims 1 to 7, pass through wadding
Retrogradation drop obtains neutral supernatant and the neutrality of leaching and leaches underflow；
(4) the neutral supernatant purifying electrolysis that leaches other than reflux is obtained into zinc product；
(5) by neutrality leach underflow using conventional wet lay zinc metallurgy process carry out Weak-acid leaching, control ore pulp endpoint pH be 2.5~
3.5；Obtain Weak-acid leaching ore pulp；
(6) Weak-acid leaching ore pulp is used into the dense solid-liquor separation of method as claimed in any one of claims 1 to 7, passes through wadding
Retrogradation drop, obtains Weak-acid leaching supernatant and Weak-acid leaching underflow；
(7) low sour underflow is subjected to filters pressing, obtains Weak-acid leaching liquid and Weak-acid leaching slag.
9. according to the method described in claim 8, it is characterized in that, zinc calcine particle described in step (1) is below in 200 mesh
Accounting is not less than 70%.
10. according to the method described in claim 8, it is characterized in that, dense liquid described in step (3) and step (6) divides admittedly
From directly progress after leaching, 40-90 DEG C of slurry temperature, the flocculating setting time is no less than 30min.
11. according to the method described in claim 8, it is characterized in that, underflow density after step (3) and step (6) flocculating setting
Not less than 15%.
12. according to the method described in claim 8, it is characterized in that, neutrality described in step (3) leaches institute's slag inclusion in underflow
Particle is not less than 50% in 200 mesh accounting below.
13. according to the method described in claim 8, it is characterized in that, Weak-acid leaching slag moisture content described in step (7) does not surpass
Cross 20%.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363917A (en) * | 2020-03-25 | 2020-07-03 | 云南云铜锌业股份有限公司 | Treatment method of high silicon zinc roasted ore |
| CN112760478A (en) * | 2020-12-10 | 2021-05-07 | 核工业北京化工冶金研究院 | High-clay polymetallic ore pulp thickening method |
| CN113088691A (en) * | 2021-03-10 | 2021-07-09 | 金川集团股份有限公司 | Sedimentation separation method of nickel leachate |
| CN115612860A (en) * | 2022-10-26 | 2023-01-17 | 云南驰宏资源综合利用有限公司 | Leaching method of high-silicon zinc roasted ore |
| CN115725860A (en) * | 2022-09-15 | 2023-03-03 | 新疆盛安新材料科技有限公司 | High-silicon vanadium-containing residue acid leaching vanadium extraction method |
| CN115747512A (en) * | 2022-11-22 | 2023-03-07 | 白银有色集团股份有限公司 | Method for improving zinc powder purification efficiency of zinc hydrometallurgy |
-
2019
- 2019-08-19 CN CN201910763364.8A patent/CN110358933A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363917A (en) * | 2020-03-25 | 2020-07-03 | 云南云铜锌业股份有限公司 | Treatment method of high silicon zinc roasted ore |
| CN112760478A (en) * | 2020-12-10 | 2021-05-07 | 核工业北京化工冶金研究院 | High-clay polymetallic ore pulp thickening method |
| CN113088691A (en) * | 2021-03-10 | 2021-07-09 | 金川集团股份有限公司 | Sedimentation separation method of nickel leachate |
| CN115725860A (en) * | 2022-09-15 | 2023-03-03 | 新疆盛安新材料科技有限公司 | High-silicon vanadium-containing residue acid leaching vanadium extraction method |
| CN115612860A (en) * | 2022-10-26 | 2023-01-17 | 云南驰宏资源综合利用有限公司 | Leaching method of high-silicon zinc roasted ore |
| CN115612860B (en) * | 2022-10-26 | 2023-09-19 | 云南驰宏资源综合利用有限公司 | Leaching method of high-silicon zinc roasted ore |
| CN115747512A (en) * | 2022-11-22 | 2023-03-07 | 白银有色集团股份有限公司 | Method for improving zinc powder purification efficiency of zinc hydrometallurgy |
| CN115747512B (en) * | 2022-11-22 | 2023-12-19 | 白银有色集团股份有限公司 | Method for improving purification efficiency of zinc hydrometallurgy zinc powder |
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Application publication date: 20191022 |