CN110016554A - A kind of method that autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching - Google Patents
A kind of method that autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching Download PDFInfo
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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
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/18—Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
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Abstract
The invention discloses a kind of methods that autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, belong to biological metallurgy technical field.Semiconductor sulfide mineral is leached using acidophilus iron sulfur-oxidizing bacteria under the visible light conditions for adding 0.1-6g/L biosynthesis autunezite and light intensity to be 4000Lux-12000Lux outside.Significantly improve semiconductor sulfide mineral Bioleaching efficiency.33.5-35.7% is improved than not adding the control group leaching rate of autunezite under dark condition in visible light and autunezite synergy lower semiconductor sulfide mineral leaching rate.Method of the invention can significantly improve the leaching rate of semiconductor sulfide mineral, so that application of the Bioleaching technology on resources processing field is of great significance.
Description
Technical field
The invention belongs to biological metallurgy technical fields, and in particular to a kind of autunezite reinforcing photocatalytic semiconductor sulphide ore
The method of object Bioleaching.
Background technique
The extraction of copper at present mainly uses pyrometallurgical smelting, and this method can generate a large amount of pollutions, and with high costs.Biology leaching
For technology since it is with easy to operate, reaction condition is mild, environmentally friendly, the advantages such as at low cost, and is capable of handling out
Low-grade, complicated intractable mineral have received widespread attention.The copper of whole world 20-25% is added by Bioleaching at present
Work obtains, therefore Bioleaching has a good application prospect in mineral resource processing field.However sulfide mineral Bioleaching
Long with leaching cycle, the disadvantages such as leaching rate is low limit its and are further widely applied.Therefore it needs to seek feasible method
Improve sulfide mineral Bioleaching efficiency.A large amount of researcher adds in recent years by adjusting system pH and oxidation-reduction potential
Add catalyst, sulfide mineral bioleaching is improved using means such as high temperature mixed bacterials.They obtain one at these methods
Fixed success, but they have ignored the semiconductor property in sulfide mineral bioleaching process.
The light induced electron inspired when radiation of visible light semiconductor sulfide mineral can be converted into acidophilus iron sulfur-oxidizing bacteria
The chemical energy utilized promotes bacterial growth, so as to promote its Bioleaching using this photocatalysis performance of sulfide mineral.
But also result in more autunezite under illumination condition in sulfide mineral bioleaching process and generate, autunezite can make sulphur
Change mineral surfaces passivation, the delivery rate of light induced electron can be inhibited, increase light induced electron is compound with photohole, reduces light and urges
Change the efficiency of sulfide mineral Bioleaching.Therefore sulfide mineral surface autunezite is inhibited to be formed for improving photocatalysis sulphide ore
The efficiency important in inhibiting of object bioleaching.Additional autunezite can exist as autunezite in crystal seed leaching acceleration system
Seed surface is formed, and thus be can be reduced passivation autunezite and is formed on sulfide mineral surface, to be obviously improved sulphide ore
Object Bioleaching efficiency.The present invention significantly increases the life of photocatalytic semiconductor sulfide mineral by additional biosynthesis autunezite
The efficiency that object leaches.
Summary of the invention
The purpose of the invention is to improve the efficiency of photocatalytic semiconductor sulfide mineral Bioleaching, a kind of Huang has been invented
The method that krausite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, the method can remarkably promote photocatalytic semiconductor sulphur
Change mineral Bioleaching.
The purpose of the present invention is what is be accomplished by the following way:
A kind of method that autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, is in photocatalytic semiconductor sulphur
Change in mineral bioleaching process and adds autunezite.
The method that the autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, the autunezite exist
Concentration in photocatalytic semiconductor sulfide mineral Bioleaching system is 0.1-6g/L；Further preferred concentration is 0.5-2g/L.
The method that the autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, the autunezite are
Biosynthesis.
The method that the autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, the life of the autunezite
Object synthetic method is as follows: according to 108-109Acidophilus iron-oxidizing bacterium is seeded to 250mL and contains 0.08- by the inoculum concentration of cells/ml
0.32M FeSO4·7H2O and 13.33-53.30mM K2SO4PH 2.0-3.0 aqueous solution in, and FeSO4·7H2O and K2SO4
Molar ratio be 6:1, shaking speed be 100-200rpm, temperature be 20-50 DEG C under the conditions of cultivated, collected after 3-7 days
Yellow mercury oxide, vacuum drying obtain autunezite.Collect the H that yellow mercury oxide preferably uses 0.1M2SO4Repeatedly with deionized water
Cleaning 3-5 times is then dried in vacuo 12 hours at 50 DEG C.
The method that the autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, photocatalytic semiconductor vulcanization
Intensity of illumination is 4000-12000lux, preferably 8000-12000lux in mineral Bioleaching system.
The method that the autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, photocatalytic semiconductor vulcanization
The semiconductor sulfide mineral of 1-5% pulp density is added in mineral Bioleaching system.
The method that the autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, Bioleaching refer to utilization
Acidophilus iron sulfur-oxidizing bacteria is leached, and preferably first tames acidophilus iron sulfur-oxidizing bacteria.
Acidophilus iron sulfur-oxidizing bacteria includes: Acidithiobacillus ferrooxidans strain GF
(Acidithiobacillusferrooxidans), thermophilic high temperature acidophilus archaeal (Ferrithrixthermotolerans) or
Person ferrous oxide hook end spirillum (Leptospirillumferrooxidans).It is thin to belong to the conventional leaching mine that can be bought
Bacterium.
The method that the autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, according to inoculum concentration be 1 ×
107-9×107Acidophilus iron sulfur-oxidizing bacteria is linked into Leaching Systems by cells/ml.
The method that the autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, Leaching Systems pH1.5-
3.0, shaking speed 100-200rpm, temperature are 20-50 DEG C.
The method that the autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, semiconductor sulfide mineral packet
Include: one of chalcopyrite, covellite, bornite, vitreous copper, pyrite are a variety of, preferably by the broken sieve of semiconductor sulfide mineral
Divide to particle size at 74 μm hereinafter, using being saved backup in preceding nitrogen atmosphere.
A kind of method that biosynthesis autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, preferably include with
Lower step:
(1) the acidophilus iron sulfur-oxidizing bacteria bacterium solution of 5-10ml is linked into 100ml first and contains partly leading for 1% pulp density
In the 9K culture medium of body sulphide ore, domestication culture is repeated, when bacterial concentration can reach 108Cells/ml completes first
Secondary domestication collects bacterium, repeats the above steps, in the semiconductor sulphide ore ore pulp containing 2%, 3%, 4%, 5% pulp density
In successively tamed, until acidophilus iron sulfur-oxidizing bacteria can adapt to the semiconductor sulphide ore ore pulp of 1%-5% pulp density
Concentration.
(2) according to 108-109Acidophilus iron-oxidizing bacterium is seeded to 250mL and contains 0.08- by the inoculum concentration of cells/ml
0.32M FeSO4·7H2O and 13.33-53.30mM K2SO4PH 2.0-3.0 aqueous solution in, and FeSO4·7H2O and K2SO4
Molar ratio be 6:1, shaking speed be 100-200rpm, temperature be 20-50 DEG C under the conditions of cultivated, collected after 3-7 days
Yellow mercury oxide, with the H of 0.1M2SO4Cleaned 3-5 times repeatedly with deionized water, then 50 DEG C be dried in vacuo 12 hours to get
Biosynthesis autunezite.
It (3) is 3 × 10 according to inoculum concentration by the acidophilus iron sulfur-oxidizing bacteria tamed in advance7-9×107Cells/ml inoculation
It is expanded culture into the 9K culture medium of the semiconductor sulfide mineral of the pulp density containing 1-5%, it is first for expanding the condition of culture
Beginning pH 1.5-3.0,20-50 DEG C of temperature.
(4) the acidophilus iron sulfur-oxidizing bacteria that logarithmic phase mid-term is arrived in culture in step (3) is collected by centrifugation, by it according to inoculum concentration
It is 1 × 107-9×107Cells/ml is linked into the half of the autunezite of biosynthesis containing 0.1-6.0g/L and 1-5% pulp density
Conductor sulfide mineral is 4000-12000lux, shaking speed 100- in intensity of illumination in the 9k culture medium of pH 1.5-3.0
200rpm, temperature are leached under the conditions of being 20-50 DEG C.
(5) pH and oxygen in bioleaching system solution were measured using pH meter and Portable potential analyzer respectively in every 3 days
Change reduction potential, utilizes Fe in ICP emission spectrometer measurement solution2+, total iron ion and Cu2+Concentration.
(6) after Bioleaching, filter paper is collected by filtration slag and carries out Analysis of Surface Topography, object phase and Elemental Composition
Analysis.
9K culture medium prescription of the present invention: (NH4)2SO4 3.0g/L、KC1 0.1g/L、K2HPO40.5g/L、
MgSO4·7H2O0.5g/L、Ca(NO3)20.01g/L, with 0.01mol/L H2SO4PH value is adjusted to 1.5-3.0.
The autunezite of additional biosynthesis can be as autunezite in crystal seed leaching acceleration system mainly in crystal seed table
Face is formed, and is reduced it and is formed in semiconductor vulcanization mineral surfaces.Analysis of Surface Topography, object phase and Elemental Composition analysis find yellow potassium
Siderotil can reduce passivation (autunezite and Sn 2-/ S0) in sulfide mineral surface formation (shown in such as Fig. 6, Fig. 7), so that outside
The autunezite of biosynthesis is added to promote sulfide mineral Bioleaching.And present inventors have unexpectedly found that biosynthesis autunezite
Effect is better than chemically synthesized autunezite.
The present invention significantly improves photocatalytic semiconductor sulfide mineral bioleaching by the autunezite of additional biosynthesis
Efficiency, equipment required for this method is simple, and reaction condition is mild, at low cost, environmentally friendly, to be photocatalytic semiconductor
The extensive use of sulfide mineral Bioleaching provides possibility.The invention is mainly adapted to semiconductor sulfide mineral.
Detailed description of the invention
Fig. 1 is copper ion concentration trend chart in the Leaching Systems solution of embodiment 1；
Fig. 2 is copper ion concentration trend chart in the Leaching Systems solution of embodiment 2；
Fig. 3 is copper ion concentration trend chart in the Leaching Systems solution of embodiment 3；
Fig. 4 is copper ion concentration trend chart in the Leaching Systems solution of embodiment 4；
Fig. 5 is copper ion concentration trend chart in the Leaching Systems solution of embodiment 5；
Fig. 6 is surface topography scanning electron microscope (SEM) photograph；
Dark 0.0g/L indicates no light and do not add biosynthesis autunezite,
Dark 1.0g/L indicates no light and the addition 1.0g/L biosynthesis autunezite in Leaching Systems,
Illumination 0.0g/L indicates illumination and do not add biosynthesis autunezite,
Illumination 1.0g/L indicates illumination and adds 1.0g/L biosynthesis autunezite in Leaching Systems.
Fig. 7 is that Elemental Composition analyses X-ray photoelectron spectroscopic analysis figure；
Dark 0.0g/L indicates no light and do not add biosynthesis autunezite,
Dark 1.0g/L indicates no light and the addition 1.0g/L biosynthesis autunezite in Leaching Systems,
Illumination 0.0g/L indicates illumination and do not add biosynthesis autunezite,
Illumination 1.0g/L indicates illumination and adds 1.0g/L biosynthesis autunezite in Leaching Systems.
Specific embodiment
The purpose of following specific embodiments or embodiment is in order to further illustrate the present invention, rather than to limit of the invention
It is fixed.
Embodiment 1
The present embodiment the method mainly sequentially includes the following steps:
(1) according to 4 × 108Ferrous oxide hook end spirillum is seeded to 250mL and contains 0.16M by the inoculum concentration of cells/mL
FeSO4·7H2O and 26.65mM K2SO42.0 aqueous solution of pH in, shaking speed be 170rpm, temperature be 40 DEG C under the conditions of
It is cultivated, is collected by filtration yellow mercury oxide with filter paper after 3 days, and with the H of 0.1M2SO4It is cleaned 3-5 times repeatedly with deionized water,
Then in 50 DEG C of vacuum drying, 12 hours acquisition autunezite materials；
(2) by chalcopyrite sample ore crushing and screening to particle size at 74 μm hereinafter, being saved backup in nitrogen atmosphere, before experiment
It is detected by synchrotron radiation X RD, it is found that the main object phase composition of mineral is chalcopyrite, also a small amount of silica, pyrite,
XRF analysis mineral element group become Cu, 33.21%, S, 31.59%, Fe, 28.21%, O, 4.88%, other elements,
2.11%；
It (3) is 3.2 × 10 according to inoculum concentration by the ferrous oxide hook end spirillum tamed in advance7Cells/ml is seeded to
It is expanded culture in the 9K culture medium of chalcopyrite containing 2% pulp density, the condition for expanding culture is initial pH 2.0, temperature
40℃；
(4) the ferrous oxide hook end spirillum that logarithmic phase mid-term is arrived in culture in step (3) is collected by centrifugation, by it according to inoculation
Amount is 3.2 × 107Cells/ml is linked into the chalcopyrite of the autunezite of biosynthesis containing 0.5g/L and 2% pulp density, pH
In 2.0 9k culture medium, intensity of illumination be 12000lux, shaking speed 170rpm, temperature be 40 DEG C under the conditions of leach 28
It.
(5) Cu in solution was measured using ICP emission spectrometer in every 3 days2+Concentration (shown in Fig. 1).
Conclusion: light intensity as shown in Figure 1 is under 12000Lux visible light and 0.5g/L biosynthesis autunezite synergy
Leaching of copper pyrites extracting rate improves 34% than not adding the control group leaching rate of biosynthesis autunezite under dark condition, compares light intensity
The leaching rate that 12000Lux does not add biosynthesis autunezite increases 6.9%.Illumination and biosynthesis Huang potassium iron are not added
When alum, chalcopyrite just serious passivation at the 16th day, copper ion concentration is not further added by, and adds illumination or biosynthesis Huang potassium
Siderotil copper ion can continue to increase, and until 28 days, there are also higher speedups.
Embodiment 2
The present embodiment the method mainly sequentially includes the following steps:
(1) according to 5 × 108Acidithiobacillus ferrooxidans strain GF is seeded to 250mL and contains 0.16M by the inoculum concentration of cells/mL
FeSO4·7H2O and 26.65mM K2SO42.0 aqueous solution of pH in, shaking speed be 170rpm, temperature be 30 DEG C under the conditions of
It is cultivated, is collected by filtration yellow mercury oxide with filter paper after 3 days, and with the H of 0.1M2SO4It is cleaned 3-5 times repeatedly with deionized water,
Then in 50 DEG C of vacuum drying, 12 hours acquisition autunezite materials；
(2) by chalcopyrite sample ore crushing and screening to particle size at 74 μm hereinafter, being saved backup in nitrogen atmosphere, before experiment
It is detected by synchrotron radiation X RD, it is found that the main object phase composition of mineral is chalcopyrite, also a small amount of silica, pyrite,
XRF analysis mineral element group become Cu, 33.21%, S, 31.59%, Fe, 28.21%, O, 4.88%, other elements,
2.11%；
It (3) is 3.2 × 10 according to inoculum concentration by the Acidithiobacillus ferrooxidans strain GF tamed in advance7Cells/ml is seeded to
It is expanded culture in the 9K culture medium of chalcopyrite containing 2% pulp density, the condition for expanding culture is initial pH 2.0, temperature
30℃；
(4) Acidithiobacillus ferrooxidans strain GF that logarithmic phase mid-term is arrived in culture in step (3) is collected by centrifugation, by it according to inoculation
Amount is 3.2 × 107Cells/ml is linked into the chalcopyrite of the autunezite of biosynthesis containing 1.0g/L and 2% pulp density, pH
In 2.0 9k culture medium, intensity of illumination be 12000lux, shaking speed 170rpm, temperature be 30 DEG C under the conditions of leach 28
It.
(5) Cu in ICP emission spectrometer measurement solution is utilized within every 3 days2+Concentration (shown in Fig. 2).
Conclusion: light intensity as shown in Figure 2 is under 12000Lux visible light and 1.0g/L biosynthesis autunezite synergy
Leaching of copper pyrites extracting rate improves 35.7% than not adding the control group leaching rate of biosynthesis autunezite under dark condition, than light
The leaching rate that strong 12000Lux does not add biosynthesis autunezite increases 8.2%.Illumination and biosynthesis Huang potassium are not added
When siderotil, at the 16th day, just serious passivation, copper ion concentration were not further added by chalcopyrite, and added illumination or biosynthesis Huang
Krausite copper ion can continue to increase, and until 28 days, there are also higher speedups.
Embodiment 3
The present embodiment the method mainly sequentially includes the following steps:
(1) according to 4 × 108Acidithiobacillus ferrooxidans strain GF is seeded to 250mL and contains 0.16M by the inoculum concentration of cells/mL
FeSO4·7H2O and 26.65mM K2SO42.0 aqueous solution of pH in, shaking speed be 170rpm, temperature be 30 DEG C under the conditions of
It is cultivated, is collected by filtration yellow mercury oxide with filter paper after 3 days, and with the H of 0.1M2SO4It is cleaned 3-5 times repeatedly with deionized water,
Then in 50 DEG C of vacuum drying, 12 hours acquisition autunezite materials；
(2) by chalcopyrite sample ore crushing and screening to particle size at 74 μm hereinafter, being saved backup in nitrogen atmosphere, before experiment
It is detected by synchrotron radiation X RD, it is found that the main object phase composition of mineral is chalcopyrite, also a small amount of silica, pyrite,
XRF analysis mineral element group become Cu, 33.21%, S, 31.59%, Fe, 28.21%, O, 4.88%, other elements,
2.11%；
It (3) is 3.2 × 10 according to inoculum concentration by the Acidithiobacillus ferrooxidans strain GF tamed in advance7Cells/ml is seeded to
It is expanded culture in the 9K culture medium of chalcopyrite containing 2% pulp density, the condition for expanding culture is initial pH 2.0, temperature
30℃；
(4) Acidithiobacillus ferrooxidans strain GF that logarithmic phase mid-term is arrived in culture in step (3) is collected by centrifugation, by it according to inoculation
Amount is 3.2 × 107Cells/ml is linked into the chalcopyrite of the autunezite of biosynthesis containing 2g/L and 2% pulp density, pH
In 2.0 9k culture medium, intensity of illumination be 12000lux, shaking speed 170rpm, temperature be 30 DEG C under the conditions of leach 28
It；
(5) Cu in ICP emission spectrometer measurement solution is utilized within every 3 days2+Concentration (shown in Fig. 3).
Conclusion: light intensity as shown in Figure 3 is yellow under 12000Lux visible light and 2g/L biosynthesis autunezite synergy
Copper mine leaching rate improves 34.6% than not adding the control group leaching rate of biosynthesis autunezite under dark condition, compares light intensity
The leaching rate that 12000Lux does not add biosynthesis autunezite increases 7.3%.Illumination and biosynthesis Huang potassium iron are not added
When alum, chalcopyrite just serious passivation at the 16th day, copper ion concentration is not further added by, and adds illumination or biosynthesis Huang potassium
Siderotil copper ion can continue to increase, and until 28 days, there are also higher speedups.
Embodiment 4
The present embodiment the method mainly sequentially includes the following steps:
(1) according to 4 × 108Acidithiobacillus ferrooxidans strain GF is seeded to 250mL and contains 0.16M by the inoculum concentration of cells/mL
FeSO4·7H2O and 26.65mM K2SO42.0 aqueous solution of pH in, shaking speed be 170rpm, temperature be 30 DEG C under the conditions of
It is cultivated, is collected by filtration yellow mercury oxide with filter paper after 3 days, and with the H of 0.1M2SO4It is cleaned 3-5 times repeatedly with deionized water,
Then in 50 DEG C of vacuum drying, 12 hours acquisition autunezite materials；
(2) by chalcopyrite sample ore crushing and screening to particle size at 74 μm hereinafter, being saved backup in nitrogen atmosphere, before experiment
It is detected by synchrotron radiation X RD, it is found that the main object phase composition of mineral is chalcopyrite, also a small amount of silica, pyrite,
XRF analysis mineral element group become Cu, 33.21%, S, 31.59%, Fe, 28.21%, O, 4.88%, other elements,
2.11%；
It (3) is 3.2 × 10 according to inoculum concentration by the Acidithiobacillus ferrooxidans strain GF tamed in advance7Cells/ml is seeded to
It is expanded culture in the 9K culture medium of chalcopyrite containing 2% pulp density, the condition for expanding culture is initial pH 2.0, temperature
30℃；
(4) Acidithiobacillus ferrooxidans strain GF that logarithmic phase mid-term is arrived in culture in step (3) is collected by centrifugation, by it according to inoculation
Amount is 3.2 × 107Cells/ml is linked into the chalcopyrite of the autunezite of biosynthesis containing 4g/L and 2% pulp density, pH
In 2.0 9k culture medium, intensity of illumination be 12000lux, shaking speed 170rpm, temperature be 30 DEG C under the conditions of leach 28
It；
(5) Cu in ICP emission spectrometer measurement solution is utilized within every 3 days2+Concentration (shown in Fig. 4).
Conclusion: light intensity as shown in Figure 4 is yellow under 12000Lux visible light and 4g/L biosynthesis autunezite synergy
Copper mine leaching rate improves 33.5% than not adding the control group leaching rate of biosynthesis autunezite under dark condition, compares light intensity
The leaching rate that 12000Lux does not add biosynthesis autunezite increases 6.5%.Illumination and biosynthesis Huang potassium iron are not added
When alum, chalcopyrite just serious passivation at the 16th day, copper ion concentration is not further added by, and adds illumination or biosynthesis Huang potassium
Siderotil copper ion can continue to increase, and until 28 days, there are also higher speedups.
Embodiment 5
The present embodiment method is same as Example 2, but the autunezite used is chemical synthesis, rather than biosynthesis
, autunezite chemical synthesis process are as follows: by the KNO of 0.2g3With the Fe of 1.18g2(SO4)3It is added to the 0.1M sulfuric acid of 100ml
In solution, it is collected by filtration yellow mercury oxide under the conditions of 80 DEG C after magnetic agitation 12h, and with the H of 0.1M2SO4Repeatedly with deionized water
Cleaning 3-5 times, then in 50 DEG C of vacuum drying, 12 hours acquisition autunezite materials.
As the result is shown: light intensity is leaching of copper pyrites under 12000Lux visible light and 1g/L chemical synthesis autunezite synergy
Extracting rate improves 26.8% than not adding the control group leaching rate of autunezite under dark condition, does not add than light intensity 12000Lux
The leaching rate of biosynthesis autunezite increases 1.1% (as shown in Figure 5).The facilitation effect of chemically synthesized autunezite is bright
The effect of the aobvious autunezite for being weaker than biosynthesis.
Claims (10)
1. a kind of method that autunezite strengthens photocatalytic semiconductor sulfide mineral Bioleaching, it is characterised in that: urged in light
Change in semiconductor sulfide mineral bioleaching process and adds autunezite.
2. the method that autunezite according to claim 1 strengthens photocatalytic semiconductor sulfide mineral Bioleaching, special
Sign is: addition concentration of the autunezite in photocatalytic semiconductor sulfide mineral Bioleaching system is 0.1-6g/
L；Further preferred concentration is 0.5-2g/L.
3. the method that autunezite according to claim 1 strengthens photocatalytic semiconductor sulfide mineral Bioleaching, special
Sign is: the autunezite is biosynthesis.
4. the method that autunezite according to claim 3 strengthens photocatalytic semiconductor sulfide mineral Bioleaching, special
Sign is: the biological synthesis method of the autunezite is as follows: according to 108-109The inoculum concentration of cells/ml aoxidizes acidophilus iron
Microbionation contains 0.08-0.32M FeSO to 250mL4·7H2O and 13.33-53.30mM K2SO4PH2.0-3.0 it is water-soluble
In liquid, and FeSO4·7H2O and K2SO4Molar ratio be 6:1, shaking speed be 100-200rpm, temperature be 20-50 DEG C of item
It is cultivated under part, yellow mercury oxide is collected after 3-7 days, vacuum drying obtains autunezite.
5. the method that autunezite according to claim 1 strengthens photocatalytic semiconductor sulfide mineral Bioleaching, special
Sign is: intensity of illumination is 4000-12000lux, preferably 8000- in photocatalytic semiconductor sulfide mineral Bioleaching system
12000lux。
6. the method that autunezite according to claim 1 strengthens photocatalytic semiconductor sulfide mineral Bioleaching, special
Sign is: the semiconductor sulfide mineral of 1-5% pulp density is added in photocatalytic semiconductor sulfide mineral Bioleaching system.
7. the method that autunezite according to claim 1 strengthens photocatalytic semiconductor sulfide mineral Bioleaching, biology
Leaching refers to is leached using acidophilus iron sulfur-oxidizing bacteria, preferably first tames acidophilus iron sulfur-oxidizing bacteria.
8. the method that autunezite according to claim 7 strengthens photocatalytic semiconductor sulfide mineral Bioleaching, special
Sign is: being 1 × 10 according to inoculum concentration7-9×107Acidophilus iron sulfur-oxidizing bacteria is linked into Leaching Systems by cells/ml.
9. the method that autunezite according to claim 1 strengthens photocatalytic semiconductor sulfide mineral Bioleaching, special
Sign is: Leaching Systems pH1.5-3.0, shaking speed 100-200rpm, and temperature is 20-50 DEG C.
10. the method that autunezite according to claim 1 strengthens photocatalytic semiconductor sulfide mineral Bioleaching, special
Sign is: semiconductor sulfide mineral includes: one of chalcopyrite, covellite, bornite, vitreous copper, pyrite or a variety of, preferably
By semiconductor sulfide mineral crushing and screening to particle size at 74 μm or less.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080637A (en) * | 2020-08-24 | 2020-12-15 | 中国科学院微生物研究所 | Photoelectric energy method for promoting microbial Ar-4 biological metallurgy leaching rate |
| CN112375903A (en) * | 2020-11-12 | 2021-02-19 | 西安建筑科技大学 | Method for enhancing leaching of arsenic pyrite microorganisms |
| CN115287453A (en) * | 2022-06-29 | 2022-11-04 | 中南大学 | Method for enhancing chalcopyrite bioleaching by flotation collector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060133974A1 (en) * | 2004-12-22 | 2006-06-22 | Placer Dome Technical Services Limited | Reduction of lime consumption when treating refractory gold ores or concentrates |
| CN102127657A (en) * | 2011-03-21 | 2011-07-20 | 中南大学 | Comprehensive recovery method for extracting ferrovanadium from stone coal acid immersion liquid |
| CN103740763A (en) * | 2014-01-20 | 2014-04-23 | 陈朋 | Method for preparing jarosite through microbial conversion |
| CN104726707A (en) * | 2013-12-23 | 2015-06-24 | 北京有色金属研究总院 | Iron balancing technology in low-grade sulfide ore biological heap leaching-leachate purification-extraction and separation process |
| CN105886760A (en) * | 2016-05-11 | 2016-08-24 | 中南大学 | Method for promoting bacterial leaching of photocatalytic semiconductor sulphide minerals through graphene |
| CN106929672A (en) * | 2017-04-07 | 2017-07-07 | 中南大学 | A kind of method that utilization crystal seed induction promotes chalcopyrite Bioleaching except iron |
-
2019
- 2019-05-06 CN CN201910369442.6A patent/CN110016554B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060133974A1 (en) * | 2004-12-22 | 2006-06-22 | Placer Dome Technical Services Limited | Reduction of lime consumption when treating refractory gold ores or concentrates |
| CN102127657A (en) * | 2011-03-21 | 2011-07-20 | 中南大学 | Comprehensive recovery method for extracting ferrovanadium from stone coal acid immersion liquid |
| CN104726707A (en) * | 2013-12-23 | 2015-06-24 | 北京有色金属研究总院 | Iron balancing technology in low-grade sulfide ore biological heap leaching-leachate purification-extraction and separation process |
| CN103740763A (en) * | 2014-01-20 | 2014-04-23 | 陈朋 | Method for preparing jarosite through microbial conversion |
| CN105886760A (en) * | 2016-05-11 | 2016-08-24 | 中南大学 | Method for promoting bacterial leaching of photocatalytic semiconductor sulphide minerals through graphene |
| CN106929672A (en) * | 2017-04-07 | 2017-07-07 | 中南大学 | A kind of method that utilization crystal seed induction promotes chalcopyrite Bioleaching except iron |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080637A (en) * | 2020-08-24 | 2020-12-15 | 中国科学院微生物研究所 | Photoelectric energy method for promoting microbial Ar-4 biological metallurgy leaching rate |
| CN112375903A (en) * | 2020-11-12 | 2021-02-19 | 西安建筑科技大学 | Method for enhancing leaching of arsenic pyrite microorganisms |
| CN115287453A (en) * | 2022-06-29 | 2022-11-04 | 中南大学 | Method for enhancing chalcopyrite bioleaching by flotation collector |
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