CN212404218U - Microorganism mineral leaching device - Google Patents
Microorganism mineral leaching device Download PDFInfo
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- CN212404218U CN212404218U CN202021010408.4U CN202021010408U CN212404218U CN 212404218 U CN212404218 U CN 212404218U CN 202021010408 U CN202021010408 U CN 202021010408U CN 212404218 U CN212404218 U CN 212404218U
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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
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Abstract
The utility model relates to a microorganism mineral leaching device, which comprises a mineral leaching unit, a potential regulating unit and a microorganism culture unit; the liquid outlet of the ore leaching unit is connected with the liquid inlet of the electric potential regulating unit; the liquid outlet of the potential regulating unit is connected with the liquid inlet of the microorganism culture unit; a microorganism filtering device is arranged between the liquid inlet of the ore leaching unit and the liquid outlet of the microorganism culture unit; a conveying unit is arranged between the ore leaching unit and the microorganism filtering device; the ore leaching unit is connected with the potential regulating unit and the oxidation-reduction potential controller. The device provided by the utility model realizes the separation of minerals and microorganisms, and makes bacteria only play a non-contact role. The contribution of the contact effect and the non-contact effect in the biological oxidation process of the sulfide minerals is known by researching the difference of the leaching rates of the minerals with or without adsorbing microorganisms under different potentials.
Description
Technical Field
The utility model relates to a biological mineral leaching field, concretely relates to microorganism mineral leaching device especially relates to a biological mineral leaching device that is used for studying mineral leaching dynamics under the constant potential condition.
Background
Acidophilic microorganisms play an important role in sulphide ore oxidation. It is closely related to the extraction of copper and gold in biological metallurgical mine. For example, CN102337228A discloses a thermophilic acidophilic bacterium and low-grade primary copper sulfide ore microorganism sectional leaching process, which comprises the following steps: (1) acclimatizing and amplifying culturing mesophilic acidophilic bacteria, moderate thermophilic acidophilic bacteria and thermophilic acidophilic bacteria to obtain adaptive ore leaching bacterial strains; (2) crushing the ores, stacking, and burying a temperature probe in the stack; (3) spraying the piled ore with a dilute sulfuric acid solution to neutralize alkaline gangue in the ore; (4) respectively adding the mesophilic acidophilic bacteria, the moderate thermophilic acidophilic bacteria and the thermophilic acidophilic bacteria which are amplified and cultured in the step (1) to the piled ore piles in a spraying or dripping mode according to the rise of the temperature in the piles; (5) and the leachate from the leaching step is sent to a metal recovery step. The method utilizes the heat generated by oxidizing the sulfide minerals by the leaching bacteria to gradually increase the internal temperature of the ore pile, and can realize the high-temperature heap leaching of the low-grade primary copper sulfide ore and improve the leaching rate of the primary copper sulfide ore by adding the mesophilic acidophile, the moderate thermophilic acidophile and the thermophilic acidophile in sections. Is suitable for developing low-grade primary copper sulfide ore resources.
CN104152691A discloses a biological heap leaching process for stripping copper sulfide ore in open air, which comprises the steps of crushing copper sulfide ore with low copper grade and high oxidation degree, screening, stacking, dripping water and dilute sulfuric acid in sequence, adjusting pH value, and then dripping normal temperature acidophilic bacteria and medium temperature acidophilic bacteria in sequence according to temperature change to replace copper in leachate. The process has the advantages of simple process, short flow, little pollution, capability of treating low-grade copper sulfide ore and the like; the adopted mineral leaching bacteria are widely distributed and are easy to obtain.
CN104607443A discloses a method for treating solid waste by using a membrane bioreactor to culture biological leachate, belonging to the technical field of solid waste resource treatment. The membrane bioreactor is applied to the culture and regeneration of bioleaching liquid for the first time and is used for harmless and resource treatment of dangerous solid wastes. A group of membrane modules are arranged in the bioreactor. The growth and metabolism of the leaching strain are controlled by adjusting aeration quantity, stirring speed, nutrient concentration and the like. When the concentration of the leaching bacterial strain reaches a stable period, starting water inlet and water outlet to enable the membrane bioreactor to reach a constant state, and enriching the leaching bacterial strain by utilizing the interception effect of the membrane so as to improve the yield of the biological leaching liquid. The utility model discloses a great deal of problems such as leaching bacterial strain growth is slow, the biomass is little, leaching efficiency is low, leaching cycle length have effectively been solved. The method has the advantages of simple process, convenient operation, high safety, energy conservation, energy consumption and wide application range, and is suitable for harmless and recycling treatment of different solid wastes.
Therefore, understanding the oxidation law of sulfide minerals in the presence of acidophilic bacteria plays an important role in inhibiting acid mine wastewater and efficiently extracting target metals.
Microbial leaching of sulphide ores refers to a process for dissolving valuable metals from ores with a solvent containing microorganisms. The biometallurgical mechanisms are now widely recognized as "contact effect" versus "non-contact effect". "contact action" means that the microorganisms adsorbed on the mineral surface are complexed with Fe in the surface polymer3+To oxidize the sulphide minerals. "non-contact action" means that the microorganism dissolves Fe in solution by oxidation2+To Fe3+And is of Fe3+And oxidizing the sulphide ores.
Most of the existing biological mineral leaching devices place microorganisms and minerals in the same reactor, so that the contact effect and the non-contact effect exist at the same time, and the contributions of the two effects cannot be researched. And because of the existence of microorganism ferrous oxide microorganism, the microorganism ferrous oxide continuously raises the solution potential, but can not reduce the solution potential, so that the whole mineral dynamics research has huge deviation.
SUMMERY OF THE UTILITY MODEL
In view of the problems existing in the prior art, the object of the present invention is to provide a microorganism leaching apparatus, which can separate minerals from microorganisms and make bacteria only perform "non-contact function". The contribution of the contact effect and the non-contact effect in the biological oxidation process of the sulfide minerals is known by researching the difference of the leaching rates of the minerals with or without adsorbing microorganisms under different potentials. The contact effect is avoided. And the solution potential was constant. Makes it possible to study the contact effect and the non-contact effect under different potentials. Thereby proposing a targeted sulfide mineral leaching scheme.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a microorganism mineral leaching device, which comprises a mineral leaching unit, a potential regulating unit and a microorganism culture unit;
the liquid outlet of the ore leaching unit is connected with the liquid inlet of the electric potential regulating unit;
the liquid outlet of the potential regulating unit is connected with the liquid inlet of the microorganism culture unit;
a microorganism filtering device is arranged between the liquid inlet of the ore leaching unit and the liquid outlet of the microorganism culture unit;
a conveying unit is arranged between the ore leaching unit and the microorganism filtering device;
the ore leaching unit is connected with the potential regulating unit and the oxidation-reduction potential controller.
The device provided by the utility model realizes the separation of minerals and microorganisms, and makes bacteria only play a non-contact role. The contribution of the contact effect and the non-contact effect in the biological oxidation process of the sulfide minerals is known by researching the difference of the leaching rates of the minerals with or without adsorbing microorganisms under different potentials. The contact effect is avoided. And the solution potential was constant. Makes it possible to study the contact effect and the non-contact effect under different potentials. Thereby proposing a targeted sulfide mineral leaching scheme.
As the preferable technical proposal of the utility model, the ore leaching unit is a closed reactor with a temperature control device and a stirring device.
As the preferable technical proposal of the utility model, the electric potential regulating and controlling unit comprises an electrolysis device;
the liquid outlet of the ore leaching unit is connected with the liquid inlet of the electrolysis device;
the liquid outlet of the electrolysis device is connected with the liquid inlet of the microorganism culture unit.
As the preferable technical proposal of the utility model, the electrolysis device comprises an electrolysis bath, electrodes and a power supply;
the electrolytic tank is connected with a medicament delivery unit;
the medicament delivery unit comprises a liquid pump and a medicament storage device which are connected in sequence;
the liquid pump is connected with the electrolytic bath.
As the preferred technical proposal of the utility model, the liquid pump and the power supply are connected with the oxidation-reduction potential controller.
As the preferable technical proposal of the utility model, the microorganism filtering device is a filtering device with a filter membrane.
As the preferable technical proposal of the utility model, the microorganism culture unit is a closed reactor with a temperature control device and a stirring device.
As the preferred technical scheme of the utility model, the liquid outlet department that soaks the ore unit is provided with the filter cloth.
The utility model discloses in, the filter cloth that soaks ore unit liquid outlet and set up can prevent that mineral particles from being pumped out the reactor.
As the preferable technical proposal of the utility model, a supporting pore plate is also arranged in the microorganism filtering device;
the filter membrane is arranged on the support pore plate.
The utility model discloses in, the filter membrane is microfiltration membrane, the round hole that sets up on the support orifice plate makes things convenient for solution infiltration, can also increase filter membrane intensity simultaneously.
As the preferable technical proposal of the utility model, an oxidation-reduction potential electrode is arranged in the ore leaching unit;
the delivery unit comprises a liquid pump;
the oxidation-reduction potential electrode is connected with the oxidation-reduction potential controller.
In the utility model, when the potential is higher than the control value, the controller controls the DC power supply to work, and the ferric ions are reduced by electrolysis to be the ferrous ions, thereby reducing the potential of the solution. When the potential of the solution is lower than the control value, the controller controls the peristaltic pump to work, diluted oxidant is added into the electrolytic cell, and ferrous iron ions are oxidized to increase the potential.
So as to achieve relatively stable solution potential.
The utility model provides a temperature regulating device is rising temperature device and heat sink etc. only need guarantee the temperature in the reaction system can at the within range of setting for.
The device provided by the utility model when studying "contact effect", only need to demolish microorganism filter equipment or set up the pipeline branch road between liquid pump and microorganism culture unit or demolish the filter membrane in the microorganism filter equipment and can realize.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the device provided by the utility model can realize mineral and microorganism separation, and the bacterium only plays "non-contact effect". The contribution of the contact effect and the non-contact effect in the biological oxidation process of the sulfide minerals is known by researching the difference of the leaching rates of the minerals with or without adsorbing microorganisms under different potentials. The contact effect is avoided. And the solution potential was constant. Makes it possible to study the contact effect and the non-contact effect under different potentials. Thereby proposing a targeted sulfide mineral leaching scheme.
Drawings
Fig. 1 is a schematic view of an apparatus provided in embodiment 1 of the present invention;
in the figure: 1-mineral leaching unit, 2-potential regulating unit, 3-microorganism culturing unit, 4-microorganism filtering device, 5-conveying unit, 6-oxidation reduction potential controller, 7-medicament conveying unit, 7.1-medicament storage device and 7.2-liquid pump.
The present invention will be described in further detail below. However, the following examples are only simple examples of the present invention, and do not represent or limit the scope of the present invention, which is defined by the appended claims.
Detailed Description
To better illustrate the present invention, facilitating the understanding of the technical solutions of the present invention, typical but not limiting embodiments of the present invention are as follows:
example 1
The present embodiment provides a microbial mineral leaching apparatus, as shown in fig. 1, the microbial mineral leaching apparatus includes a mineral leaching unit 1, a potential regulating unit 2, and a microbial culture unit 3;
the liquid outlet of the ore leaching unit 1 is connected with the liquid inlet of the electric potential regulating unit 2;
the liquid outlet of the potential regulating unit 2 is connected with the liquid inlet of the microorganism culture unit 3;
a microorganism filtering device 4 is arranged between the liquid inlet of the ore leaching unit 1 and the liquid outlet of the microorganism culture unit 3;
a conveying unit 5 is arranged between the ore leaching unit 1 and the microorganism filtering device 4;
the ore leaching unit 1 is connected with the potential regulating unit 2 and the oxidation-reduction potential controller 6.
The ore leaching unit 1 is a closed reactor with a temperature control device and a stirring device.
The potential regulating unit 2 comprises an electrolysis device;
the liquid outlet of the ore leaching unit 1 is connected with the liquid inlet of the electrolysis device;
the liquid outlet of the electrolysis device is connected with the liquid inlet of the microorganism culture unit 3.
The electrolysis device comprises an electrolysis bath, electrodes and a power supply;
the electrolytic cell is connected with a medicament delivery unit 7;
the medicament delivery unit 7 comprises a liquid pump 7.2 and a medicament storage device 7.1 which are connected in sequence;
the liquid pump 7.2 is connected to the electrolysis cell.
The liquid pump 7.2 and the power supply are connected to the redox potential controller 6.
The microorganism filtering device 4 is a filtering device with a filter membrane.
The microorganism culture unit 3 is a closed reactor with a temperature control device and a stirring device.
And a filter cloth is arranged at the liquid outlet of the ore leaching unit 1.
A supporting pore plate is also arranged in the microorganism filtering device 4;
the filter membrane is arranged on the support pore plate.
An oxidation-reduction potential electrode is arranged in the ore leaching unit 1;
the delivery unit 5 comprises a liquid pump;
the oxidation-reduction potential electrode is connected with the oxidation-reduction potential controller 6.
Application example
The application example provides a concrete application process of the microorganism mineral leaching device:
providing pyrite of-200 meshes;
providing a concentration of 107Microbial agent per mL;
adding pyrite into an ore leaching device;
adding a microbial agent into a microbial culture device;
when leaching is started, the concentration of iron in the whole liquid phase in the device is 9 g/L;
the addition amount of the pyrite is 5% of the mass of a liquid phase at the beginning of leaching;
regulating the operating temperature of the two devices to 60 ℃;
adjusting the potential of the oxidation-reduction potential controller to 430 mV;
further researching the difference of the leaching rate of the mineral with or without the adsorbed microorganisms under the potential to understand the contribution of non-contact effect in the biological oxidation process of the sulfide mineral;
the "non-contact effect" at different potentials was then studied by adjusting the potential of the redox potential controller.
As can be seen from the results of the above examples and application examples, the device of the present invention can separate minerals from microorganisms, and allow bacteria to perform only a "non-contact effect". The contribution of the contact effect and the non-contact effect in the biological oxidation process of the sulfide minerals is known by researching the difference of the leaching rates of the minerals with or without adsorbing microorganisms under different potentials. The contact effect is avoided. And the solution potential was constant. Makes it possible to study the contact effect and the non-contact effect under different potentials. Thereby proposing a targeted sulfide mineral leaching scheme.
The applicant states that the present invention is described by the above embodiments, but the present invention is not limited to the above detailed structural features, i.e. the present invention can be implemented only by relying on the above detailed structural features. It should be clear to those skilled in the art that any modifications to the present invention, to the equivalent replacement of selected parts and the addition of auxiliary parts, the selection of specific modes, etc., all fall within the scope of protection and disclosure of the present invention.
The above detailed description describes the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be within the scope of the present invention, and can be right to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (10)
1. The microorganism mineral leaching device is characterized by comprising a mineral leaching unit, a potential regulating unit and a microorganism culture unit;
the liquid outlet of the ore leaching unit is connected with the liquid inlet of the electric potential regulating unit;
the liquid outlet of the potential regulating unit is connected with the liquid inlet of the microorganism culture unit;
a microorganism filtering device is arranged between the liquid inlet of the ore leaching unit and the liquid outlet of the microorganism culture unit;
a conveying unit is arranged between the ore leaching unit and the microorganism filtering device;
the ore leaching unit is connected with the potential regulating unit and the oxidation-reduction potential controller.
2. The microbial ore leaching apparatus of claim 1, wherein the ore leaching unit is a closed reactor with a temperature control device and a stirring device.
3. The microbial ore leaching apparatus of claim 1, wherein the potential regulating unit includes an electrolysis device;
the liquid outlet of the ore leaching unit is connected with the liquid inlet of the electrolysis device;
the liquid outlet of the electrolysis device is connected with the liquid inlet of the microorganism culture unit.
4. The microbial ore leaching apparatus of claim 3, wherein the electrolysis apparatus includes an electrolysis cell, electrodes and a power source;
the electrolytic tank is connected with a medicament delivery unit;
the medicament delivery unit comprises a liquid pump and a medicament storage device which are connected in sequence;
the liquid pump is connected with the electrolytic bath.
5. The microbial leaching apparatus of claim 4, wherein the fluid pump and the power source are connected to the redox potential controller.
6. The microbial leaching apparatus of claim 1, wherein the microbial filtration device is a filter device with a filter membrane.
7. The microbial mineral leaching apparatus of claim 1, wherein the microbial cultivation unit is a closed reactor with a temperature control device and a stirring device.
8. The microbial ore leaching apparatus according to claim 1, wherein a filter cloth is provided at the outlet of the ore leaching unit.
9. The microbial ore leaching apparatus of claim 6, wherein a support orifice plate is further provided within the microbial filtration unit;
the filter membrane is arranged on the support pore plate.
10. The microbial ore leaching apparatus according to claim 1, wherein an oxidation-reduction potential electrode is provided in the ore leaching unit;
the delivery unit comprises a liquid pump;
the oxidation-reduction potential electrode is connected with the oxidation-reduction potential controller.
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| CN202021010408.4U CN212404218U (en) | 2020-06-04 | 2020-06-04 | Microorganism mineral leaching device |
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| CN202021010408.4U CN212404218U (en) | 2020-06-04 | 2020-06-04 | Microorganism mineral leaching device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107658A (en) * | 2021-11-12 | 2022-03-01 | 江苏科技大学 | Biological-chemical two-stage circulating reactor for pretreatment of refractory gold ores |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107658A (en) * | 2021-11-12 | 2022-03-01 | 江苏科技大学 | Biological-chemical two-stage circulating reactor for pretreatment of refractory gold ores |
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