CN107570318A - Beneficiation method for recovering copper from molybdenum dressing tailings - Google Patents
Beneficiation method for recovering copper from molybdenum dressing tailings Download PDFInfo
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- CN107570318A CN107570318A CN201710820280.4A CN201710820280A CN107570318A CN 107570318 A CN107570318 A CN 107570318A CN 201710820280 A CN201710820280 A CN 201710820280A CN 107570318 A CN107570318 A CN 107570318A
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- flotation
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Abstract
The invention discloses a beneficiation method for recovering copper from molybdenum flotation tailings, and belongs to the technical field of beneficiation. The method comprises the steps of pretreating molybdenum ore tailings in a certain mode, and controlling the pH value of flotation ore pulp within the range of 7-8.5 after the molybdenum ore tailings are treated; adding an oxidant, an inhibitor, a collecting agent and an alcohol foaming agent into the ore pulp for flotation roughing, adding a certain inhibitor into roughing foam for 2-3 times of fine separation, adding the inhibitor, the collecting agent and the alcohol foaming agent into roughing tailings for 2-3 times of scavenging, and respectively obtaining copper concentrate and tailings; according to the method, under the neutral or weakly alkaline condition, lime is not added, and the pyrite is effectively inhibited by adding the oxidant, so that the effective separation of copper-sulfur minerals is realized, and the effective enrichment and recovery of low-content copper minerals are realized.
Description
Technical field
The invention belongs to technical field of beneficiation, is related to a kind of from the beneficiation method for selecting recovery copper in molybdic tailing.
Background technology
Molybdenum is a kind of seldom element of distributed in nature, its content average out to 0.001% or so in the earth's crust.Molybdenum ore
The characteristics of be that Molybdenum in Minerals tenor is low, be often associated with a variety of valuable elements, such as copper, tungsten, gold, silver, iron.Although these yuan
The grade of element is relatively low, but when molybdenum ore reserves are especially big, the reserves of accompanying element are also considerable, therefore, molybdic tailing it is whole
Body develops, and original exhausted or inadequate resource mine is turned into new resources base again, recovers or extends production,
Unrenewable mineral resources and original mine facility are made full use of, play the potentiality in mine, and can solve environmental pollution, are changed
Kind ecological environment and regulation territory, therefore the synthetical recovery of mine tailing has huge economy, society, environmental benefit.
Copper is as a kind of basic material and strategic resource to involve the interests of the state and the people with defence engineering, mainly from comprehensive copper mine
Exploitation and extraction in bed, the cutoff grade of Copper Ores exploitation is 0.5~0.4%, but the exhaustive exploitation with abundant ore source and day
Beneficial exhausted, the cutoff grade of Copper Ores exploitation may be reduced to 0.25%, even lower.The reduction of Beneficiation Feed Grade can undoubtedly give
Copper ore dressing increases difficulty, but also indicates that simultaneously, if Treating Low-grade Copper Ores technique of preparing is broken through, from other deposit types
Reclaiming Associated Constituents copper will turn into a kind of possible.
Realize the effective enrichment and recovery of copper, it is important to efficiently separate copper mineral and pyrite, traditional method is to add
Enter lime and suppress pyrite, realize the floating of copper mineral.But, copper mineral floating because pyrite change of properties is bigger, while easily
Be difficult to control with pyrite separation process, even if adding large quantities of lime sometimes, pyrite is also difficult to be suppressed, pyrite it is a large amount of on
It is floating, the vicious circle of flotation circuit is caused, foam is sticky, copper concentrate Quality Down, while reagent consumption is big.
The content of the invention
The present invention provides a kind of from the beneficiation method for selecting recovery copper in molybdic tailing, it is therefore an objective in neutral or weak basic condition
Under, realize the effective enrichment and recovery of low content copper in ore.Using beneficiation method proposed by the present invention, technological process is brief,
Shallow crust structures efficiency high, mineral processing index are stable.
It is a kind of from select in molybdic tailing reclaim copper beneficiation method, it is characterised in that comprise the following steps：
(1) pre-process：Molybdic tailing will be selected to pre-process, and obtain handling ore pulp after processing；
(2) size mixing：Oxidant stirring is added in ore pulp is handled to size mixing, and is then added inhibitor stirring and is sized mixing, finally adds
Enter collecting agent and the stirring of alcohols foaming agent is sized mixing；
(3) roughing flotation：Step (2) is sized mixing the ore pulp of completion, carry out roughing flotation, obtain roughing foam and roughing tail
Ore deposit；
(4) flotation is selected：It is selected for several times that inhibitor progress is added in roughing foam, obtains copper concentrate；
(5) flotation is scanned：Inhibitor stirring is added in rougher tailings to size mixing, and adds collecting agent and the stirring of alcohols foaming agent
Size mixing, then carry out flotation and scan for several times, obtain mine tailing.
Further, step (1) pretreatment uses for clear water washing, Air Exposure or simultaneously, clear water washing time
Number is 5~10 times, and aeration time is 1~3 hour.
Further, step (1) control process slurry pH in the range of 7~8.5, ore pulp mass percent concentration is 20
In the range of~30%.
Further, oxidant described in step (2) is in sodium sulfite, sodium metasulfite, sulfurous acid, sodium hydrogensulfite
At least one, its dosage by raw ore per ton add 100~500g.
Further, inhibitor described in step (2) and (5) is at least one of humic acid, sodium humate, its dosage
1~100g is added for raw ore per ton.
Further, collecting agent described in step (2) and (5) is ethyl thiourethane (Z-200), and its dosage is raw ore per ton
Add 10~100g；Alcohols foaming agent is BK202 in step (2) and (5), and its dosage is that raw ore per ton adds 1~50g.
Further, inhibitor described in step (4) be waterglass, calgon, humic acid, in sodium humate extremely
Few one kind, its dosage are that raw ore per ton adds 1~50g.
Further, mixing time is 3~5min after oxidant is added in step (2), and step (2) and (5), which add, to be suppressed
Mixing time is 3~5min after agent, and mixing time is 3~5min after step (2) and (5) add collecting agent and alcohols foaming agent.
Further, the concentration times of step (4) are 2~3 times, each selected 4~8 minutes time.
Further, the number of scanning of step (5) is 2~3 times, scans the time every time 4~8 minutes.
In alkaline pH medium, pyrite generally has very high floatability, is because copper mineral present in ore is molten
Solution has activated pyrite.Prior art is in order to suppress the flotation of pyrite, it is necessary to high pH value, prolonged stir and make its table
Face aoxidizes strongly.High ph-values, which suppress pyrite, to be needed to add large quantities of lime, and in floatation process, when lime consumption where appropriate,
Flotation froth can be made to keep certain viscosity, but dosage is excessive, fine mineral particle can be promoted to bond, and influences the selection of floatation process
Property, and foam is bonded expansion, so as to influence floatation indicators.A large amount of additions of lime easily cause calcium ion in backwater simultaneously
Accumulation, in the secondary use of backwater can the fouling on preparation equipment, so as to influence the normal operation of equipment.Calcium ion is also possible to
Adverse effect occurs with other medicaments, causes dosing to increase, increases beneficiation cost.
In order to overcome the drawbacks described above of prior art, inventor passes through unremitting effort, in neutrality into weak alkaline medium, no
Lime is added, by adding suitable oxidant, pyrite is effectively suppressed.From sodium sulfite with there is similar sulphur oxygen
The oxidant of component (such as sodium hydrogensulfite, sodium metabisulfite and sulfurous acid), suppresses to pyrite, and its inhibiting mechanism is
Sodium sulfite and similar sulphur oxygen component enhance the oxidation of pyrite surface, and the hydroxide or oxygen of copper are formd on its surface
Compound, so as to reduce the adsorbance of collecting agent.With sodium sulfite and similar sulphur oxygen component in neutral and weak alkaline medium
Middle suppression of the realization to pyrite, can avoid due to lime consumption is excessive and to caused by ore dressing plant a series of problems.
It is provided by the present invention a kind of from beneficiation method that copper is reclaimed in molybdic tailing is selected, have that technological process is brief, copper sulphur
The advantage that separative efficiency is high and mineral processing index is stable, copper recovery, up to more than 15%, have up to more than 85%, Cu Concentrate Grade
There are significant economic benefit and social benefit.
Brief description of the drawings
Fig. 1 is the flow chart of beneficiation method of the present invention.
Embodiment
Further explanation is made to the present invention below in conjunction with accompanying drawing.
Embodiment 1：
Molybdic tailing is selected containing molybdenum 0.065%, copper 0.18%, sulphur 1.01% in Shaanxi somewhere.Process mineralogy lens-belowed identifying shows
Copper-bearing mineral in the mine tailing is chalcopyrite, and containing sulfur minerals are magnetic iron ore and pyrite, and the mine tailing is washed 6 times with clear water,
Control slurry pH to obtain flotation pulp 8 or so, be then aerated 2 hours, sodium sulfite 360g/t is added in flotation pulp
Raw ore stirring size mixing 3 minutes, the stirring of sodium humate 20g/t raw ores size mixing 2 minutes, Z-200 and BK202 be respectively 30g/t and
The stirring of 21g/t raw ores is sized mixing 2 minutes, is carried out roughing flotation and is obtained roughing foam and rougher tailings in 5 minutes.Roughing foam carries out three
Secondary selected operation obtains copper concentrate, and smart 1 operation adds the stirring of waterglass 20g/t raw ores and sized mixing 2 minutes, and flotation time is 5 minutes；
Smart 2 operations add the stirring of sodium humate 20g/t raw ores and sized mixing 2 minutes, and flotation time is 5 minutes；Smart 3 operations add waterglass
The stirring of 5g/t raw ores is sized mixing 2 minutes, and flotation time is 5 minutes.Rougher tailings carry out it is secondary scan operation obtain abandon mine tailing, sweep
1 operation add the stirring of sodium humate 10g/t raw ores size mixing 2 minutes, Z-200 and BK202 be respectively 10g/t and 10.5g/t raw ores
Stirring is sized mixing 2 minutes, and flotation time is 5 minutes；Sweep 2 operations addition sodium humate 10g/t raw ores and stir size mixing 2 minutes, Z-200
It is respectively that the stirring of 7.5g/t and 5g/t raw ores is sized mixing 2 minutes with BK202, flotation time is 5 minutes.This selects molybdic tailing to carry out once
Roughing, triple cleaning, it is secondary scan operation and can obtain yield as 0.80%, copper grade 19.07%, the rate of recovery is
85.08% copper concentrate.
Embodiment 2：
Peru selects in somewhere molybdic tailing containing molybdenum 0.038%, copper 0.13%, sulphur 2.63%.Process mineralogy lens-belowed identifying shows
Copper-bearing mineral in the mine tailing is chalcopyrite, and containing sulfur minerals are pyrite, and the mine tailing is washed 5 times with clear water, controls pH values of pulp
Value obtains flotation pulp 8 or so, is then aerated 2 hours, and the stirring of sodium sulfite 400g/t raw ores is added in flotation pulp and is adjusted
Slurry 3 minutes, the stirring of sodium humate 30g/t raw ores size mixing 2 minutes, Z-200 and BK202 be respectively the stirring of 28g/t and 14g/t raw ores
Size mixing 2 minutes, carry out roughing flotation and obtain roughing foam and rougher tailings in 5 minutes.Roughing foam carries out triple cleaning operation and obtained
To copper concentrate, smart 1 operation adds the stirring of waterglass 25g/t raw ores and sized mixing 2 minutes, and flotation time is 5 minutes；Smart 2 operations add
The stirring of sodium humate 15g/t raw ores is sized mixing 2 minutes, and flotation time is 5 minutes；Smart 3 operations add the stirring of waterglass 10g/t raw ores
Size mixing 2 minutes, flotation time is 5 minutes.Rougher tailings carry out it is secondary scan operation and obtain abandoning mine tailing, sweep 1 operation add it is rotten
The stirring of sodium phytate 15g/t raw ores size mixing 2 minutes, Z-200 and BK202 be respectively that the stirring of 10g/t and 7g/t raw ores is sized mixing 2 minutes,
Flotation time is 5 minutes；Sweep 2 operations add the stirring of sodium humate 5g/t raw ores size mixing 2 minutes, Z-200 and BK202 be respectively
The stirring of 10g/t and 3.5g/t raw ores is sized mixing 2 minutes, and flotation time is 5 minutes.This selects molybdic tailing to carry out one roughing, three times essence
Choosing, it is secondary scan operation and can obtain yield as 0.65%, copper grade 16.50%, the rate of recovery is 82.50% copper concentrate.
Claims (10)
- It is 1. a kind of from the beneficiation method for selecting recovery copper in molybdic tailing, it is characterised in that to comprise the following steps：(1) pre-process：Molybdic tailing will be selected to pre-process, and obtain handling ore pulp after processing；(2) size mixing：Oxidant stirring is added in ore pulp is handled to size mixing, and is then added inhibitor stirring and is sized mixing, is eventually adding and catches Receive agent and the stirring of alcohols foaming agent is sized mixing；(3) roughing flotation：Step (2) is sized mixing the ore pulp of completion, carry out roughing flotation, obtain roughing foam and rougher tailings；(4) flotation is selected：It is selected for several times that inhibitor progress is added in roughing foam, obtains copper concentrate；(5) flotation is scanned：Inhibitor stirring is added in rougher tailings to size mixing, and adds collecting agent and the stirring of alcohols foaming agent is adjusted Slurry, then carry out flotation and scan for several times, obtain mine tailing.
- 2. the method as described in claim 1, it is characterised in that step (1) it is described pretreatment for clear water washing, Air Exposure or Person uses simultaneously, and clear water washing times are 5~10 times, and aeration time is 1~3 hour.
- 3. the method as described in claim 1, it is characterised in that step (1) control process slurry pH in the range of 7~8.5, Ore pulp mass percent concentration is in the range of 20~30%.
- 4. the method as described in claim 1, it is characterised in that oxidant described in step (2) is sodium sulfite, inclined sulfurous acid At least one of sodium, sulfurous acid, sodium hydrogensulfite, its dosage add 100~500g by raw ore per ton.
- 5. the method as described in claim 1, it is characterised in that inhibitor described in step (2) and (5) is humic acid, rotten plant At least one of sour sodium, its dosage are that raw ore per ton adds 1~100g.
- 6. the method as described in claim 1, it is characterised in that collecting agent described in step (2) and (5) is ethyl thiourethane, Its dosage is that raw ore per ton adds 10~100g；Alcohols foaming agent is BK202 in step (2) and (5), and its dosage is raw ore per ton Add 1~50g.
- 7. the method as described in claim 1, it is characterised in that inhibitor described in step (4) is waterglass, hexa metaphosphoric acid At least one of sodium, humic acid, sodium humate, its dosage are that raw ore per ton adds 1~50g.
- 8. the method as described in claim 1, it is characterised in that add in step (2) mixing time after oxidant be 3~ Mixing time is 3~5min after 5min, step (2) and (5) addition inhibitor, and step (2) and (5) add collecting agent and alcohols rises Mixing time is 3~5min after infusion.
- 9. the method as described in claim 1, it is characterised in that the concentration times of step (4) are 2~3 times, each selected time 4~8 minutes.
- 10. the method as described in claim 1, it is characterised in that step (5) scans number as 2~3 times, when scanning every time Between 4~8 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710820280.4A CN107570318A (en) | 2017-09-13 | 2017-09-13 | Beneficiation method for recovering copper from molybdenum dressing tailings |
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| CN201710820280.4A CN107570318A (en) | 2017-09-13 | 2017-09-13 | Beneficiation method for recovering copper from molybdenum dressing tailings |
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Cited By (2)
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| CN109482363A (en) * | 2018-12-29 | 2019-03-19 | 紫金矿业集团股份有限公司 | Copper-molybdenum bulk concentrate sulfur acid pretreatment separating flotation method |
| CN115921118A (en) * | 2022-10-11 | 2023-04-07 | 昆明理工大学 | Novel composite inhibitor for separation of pyrite and chalcopyrite and beneficiation method |
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| CN109482363A (en) * | 2018-12-29 | 2019-03-19 | 紫金矿业集团股份有限公司 | Copper-molybdenum bulk concentrate sulfur acid pretreatment separating flotation method |
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| CN115921118B (en) * | 2022-10-11 | 2024-04-05 | 昆明理工大学 | Novel composite inhibitor for separating pyrite from chalcopyrite and beneficiation method |
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