CN102816928A - Treatment and recovery method of residual copper and nickel metals in mine tailings - Google Patents
Treatment and recovery method of residual copper and nickel metals in mine tailings Download PDFInfo
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Abstract
The invention relates to the field of copper and nickel mine tailing comprehensive treatment, and discloses a treatment and recovery method of residual copper and nickel metals in mine tailings. The method comprises the steps that: the mine tailings are treated with a leaching process; the mine tailings subjected to the leaching treatment is compacted by using a plate press frame; the leaching solution leachate of the mine tailings is obtained by filtering, such that separated leaching solution and leaching slag are obtained; and valent heavy metals in the leaching solution are extracted with a continuous absorption exchange method. With the technical scheme provided by the invention, mine tailing residual metal recovery rate can be improved, and pollution risks of soils and underground water caused by the mine tailings are greatly reduced or eliminated.
Description
Technical field
The present invention relates to the tailings comprehensive process field, technology is reclaimed in the processing that relates in particular to a kind of copper nickel mine tailing kish.
Background technology
12718 in the existing mine tailing storehouse of China is 1526 building the mine tailing storehouse wherein, accounts for 12% of sum, has closed 1024 in the mine tailing storehouse in storehouse, accounts for 8% of sum, and by 2007, it was 80.46 hundred million tons that national mine tailing is piled up total amount.Only 2007, nearly 1,000,000,000 tons of national mine tailing discharge capacity.Mine tailing store up problems such as bringing resource, environment, safety and soil in a large number.
At present, China's mine tailing is generally taked spoil reclaming, mine tailing to produce material of construction, mine tailing to be used to make the method that fertilizer, empty exploiting field, filling mine, mine tailing storehouse reclaims and to come it is fully utilized.Yet exist the mine tailing valuable metal not have recovery and utilization, mine tailing that there are realistic problems such as pollution hidden trouble in soil and water resources at above-mentioned traditional tailings processing method.
Summary of the invention
The embodiment of the invention first purpose is to provide a kind of tailings comprehensive treatment process, uses its technical scheme and helps improving mine tailing valuable metal recovery utilization rate, and eliminate mine tailing to soil and phreatic pollution hidden trouble.
The integrated conduct method of a kind of mine tailing that the embodiment of the invention provides comprises:
Adopt extract technology to handle to said mine tailing;
Adopt the plate press box to suppress the mine tailing that said leaching is handled, leach the leach liquor of said mine tailing, obtain isolating said leach liquor and soak slag;
Mode through the absorption exchange is extracted the valuable metal in the said leach liquor.
Alternatively, adopt extract technology to handle to said mine tailing, specifically:
Under normal pressure, adopt the dilute sulphuric acid spray to soak said mine tailing, and in the leach liquor of said sulfuric acid and said mine tailing, add oxygenant.
Alternatively, after adopting the dilute sulphuric acid spray to soak said mine tailing, also comprise:
Heat the leach liquor of said sulfuric acid and said mine tailing.
Alternatively, said oxygenant is: air, oxygen or chlorine.
Alternatively, adopt extract technology to handle to said mine tailing, specifically:
Said mine tailing is inserted in the leaching post;
Over top at said leaching post is provided with header tank; The bottom of said header tank is provided with outlet pipe; The spout of said outlet pipe is positioned at the top of said leaching post, and the acid immersion liquid in the said header tank flows into said leaching post from the top of said leaching post, flows through said mine tailing; Flow out to the immersion liquid receiving tank from the bottom of said leaching post; Said immersion liquid receiving tank is communicated with through valve with a pump housing, and the said pump housing is communicated with said header tank, and the said pump housing can be with the immersion acid solution recycle pump in the said immersion liquid receiving tank to said header tank.
Alternatively, said leaching post is: lass lining or plastics diafiltration post.
Alternatively, the particle size diameter of said mine tailing is less than 5%cm.
Alternatively, the height of said leaching post is 1.5～6.0 meters, and the ratio of its camber and diameter is: 3～40.
Alternatively, the acid immersion liquid in the said header tank is for comprising germy acid immersion liquid.
Alternatively, said mine tailing is inserted leach in the post before, also comprise:
The acidproof filter cloth in pad shop on the Porous Base of said leaching post,
Adopt the surface of the moistening said mine tailing ore of dilute sulphuric acid of PH=1.8;
Said mine tailing is inserted in the leaching post, specifically:
Laying depth is 5 millimeters on said acidproof filter cloth, and granularity is greater than 2 millimeters block mine tailing sample,
Above said block mine tailing sample, in said leaching post, evenly load mine tailing stone then, form the mine tailing cylinder,
Be 5 millimeters at the top loading thickness of said mine tailing cylinder then again, granularity is greater than 2 millimeters block mine tailing sample;
Acid immersion liquid in the said header tank also comprises before flowing into said leaching post from the top of said leaching post:
Adopt the dilute sulphuric acid of PH=1.8 to spray said mine tailing cylinder from the top of said leaching post in advance, flow into said immersion liquid receiving tank from the bottom of said leaching post, the pH value of each the mine tailing mineral surface in said mine tailing cylinder all is stabilized in till 1.8;
The dilution heat of sulfuric acid of adding 20% is regulated in said immersion liquid receiving tank; The pH value stabilization that makes the acid immersion liquid in the said immersion liquid receiving tank is 2.0; Then the acid immersion liquid in the said immersion liquid receiving tank is evacuated to said header tank; Make said acid immersion liquid flow into said leaching post, flow through said mine tailing, flow out to the immersion liquid receiving tank from the bottom of said leaching post from the top of said leaching post.
Alternatively, adopt extract technology to handle to said mine tailing, specifically:
Spray contains the liquid of bacterium on tailings pile, and said mine tailing is immersed in the said liquid that contains bacterium,
Bottom at said tailings pile is provided with vent-pipe, and said vent-pipe is connected with blower fan, and said vent-pipe is used for the input air in the off line said tailings pile of the driving of said blower fan bottom.
Alternatively, with the spraying intensity of 5～25L/hm2, spray contains the liquid of bacterium on tailings pile.
Therefore; Use the technical scheme of the embodiment of the invention; Can the useful metal element in the mine tailing be proposed through leaching, adsorb switching technology; With respect to mine tailing processing mode traditional in the prior art, can improve the effective recycling rate of valuable metal on the one hand, can reduce the environmental disruption hidden danger of mine tailing on the other hand greatly to land resources.
Present embodiment is applied to nickel, the copper milltailings in Jinchuan, Gansu, from nineteen ninety till now, 8,000 ten thousand～100,000,000 tons mine tailing is arranged in Jinchuan company tailing dam approximately.If by 8,000 ten thousand tons mine tailing amount, average cupric 0.25%, nickel 0.2% calculate, and the amount of metal of copper is 200,000 tons in the mine tailing, and the nickel amount of metal is 160,000 tons.Now 1# electrolytic copper price is at 57000～58000 yuan/ton, electrolytic nickel about 172000 yuan/ton, in three mine tailing storehouses of Jinchuan mine tailing only the value of nickel and copper just have 35,000,000,000 yuan approximately.Can bring huge economic benefit it is thus clear that use the present embodiment technical scheme.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute to improper qualification of the present invention, in the accompanying drawings:
The process flow synoptic diagram of a kind of mine tailing ore that Fig. 1 provides for the embodiment of the invention 1;
A kind of shake flask test that Fig. 2 provides for present embodiment 1 is implemented principle schematic;
A kind of practical implementation principle schematic that leaches embodiment that Fig. 3 provides for present embodiment 1;
Fig. 4 is the application principle synoptic diagram of bacterium amplification culture groove in the present embodiment 1;
Fig. 5 soaks the expanding test process flow diagram for a kind of biological post that provides in the present embodiment 1.
Embodiment
To combine accompanying drawing and specific embodiment to specify the present invention below, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as to qualification of the present invention.
Embodiment 1:
Referring to shown in Figure 1, present embodiment provides a kind of integrated conduct method of mine tailing, and wherein main flow process is following:
Step 101: adopt extract technology to handle to mine tailing.
This project hydrometallurgy generally comprises metal separation and purifying and enrichment in preparation of ore, leaching, solid-liquid separation, the leach liquor, extraction metal target, to the unit operations such as cyclically utilizing processing of waste liquid.
According to each unit operation step of hydrometallurgy, we have formulated detailed project alternative, and are specific as follows:
1, measures the characteristic parameter of heavy metal sorbing material.It mainly is total exchange capacity (amido total content) and to the loading capacity of copper, for the application of subsequent material in comprehensive utilization of tailing provides theoretical parameter and foundation.
2, copper nickel mine tailing appearance (in the present embodiment with the copper nickel mine tailing in Jinchuan, Gansu as the enforcement project) is analyzed.Mainly be to confirm each valuable metal component, association components contents in the mine tailing, the selection of handling and leaching separation method for follow-up sample ore provides reference.
3, the copper nickel mine tailing to Jinchuan, Gansu carries out pre-treatment.Because the mine tailing granularity is thinner, carrying out to carry out the pelletizing granulation in advance when dump leaching or bacterium are leached.
4, the copper nickel mine tailing to Jinchuan, Gansu leaches.
Leaching is an important technology difficult point in this project.Because the content of valuable metal is all lower in the mine tailing, its leaching yield is improved, the leaching method of being selected for use is particularly important.
According to domestic method and Jinchuan copper nickel mine tailing characteristics and composition that hydrometallurgy leaches, we are several kinds of leaching schemes below the initial option: such as, normal pressure pickling process, dump leaching method, biologically leach or claim bacterium lixiviation process or the like again.In following examples, will preferably concentrate lixiviation process to carry out detailed description with regard to present embodiment.
Step 102: adopt the compacting of plate press box to leach treated mine tailing, leach the leach liquor of mine tailing, obtain liquid-solid isolating leach liquor and soak slag.
After carrying out the extract technology processing, present embodiment employing plate press box is suppressed filtering mode and is carried out the solid, liquid separation, thereby obtains isolating leach liquor and soak slag.
Step 103: the mode through the continuous adsorption exchange is extracted the valuable metal in the leach liquor.
Process for extracting for metal in the leach liquor: chemical precipitation, SX, absorption exchange.This project mainly adopts the continuous adsorption exchange---directly electrodeposition technology carries out separation and Extraction step by step to valuable metal.
This research is through the leakage experiment, and (GX-1 GXA-Cu) adsorbs and desorb leach liquor the heavy metal sorbing material of researching and developing with our company." the retrograde rotation wide spectrum is decided target metal absorption exchange and separated the method for purification new technology " adopted in whole experiment.
Therefore; Use the present embodiment method; Can the residual valuable metal element in the mine tailing be proposed through leaching, adsorb exchange process; With respect to mine tailing processing mode traditional in the prior art, can effectively improve the recovery utilization rate of valuable metal on the one hand, can eliminate the environmental disruption hidden danger of mine tailing on the other hand greatly to soil and groundwater resource.
Present embodiment is applied to nickel, the copper milltailings in Jinchuan, Gansu, from nineteen ninety till now, 8,000 ten thousand～100,000,000 tons mine tailing is arranged in Jinchuan company tailing dam approximately.If by 8,000 ten thousand tons mine tailing amount, average cupric 0.25%, nickel 0.2% calculate, and the amount of metal of copper is 200,000 tons in the mine tailing, and the nickel amount of metal is 160,000 tons.Now 1# electrolytic copper price is at 57000～58000 yuan/ton, electrolytic nickel about 172000 yuan/ton, in the mine tailing of Jinchuan only the value of nickel and copper just have 35,000,000,000 yuan approximately.Can bring huge economic benefit it is thus clear that use the present embodiment technical scheme.
In the present embodiment, can but be not limited to adopt following normal pressure acidleach mode to carry out extract technology to handle:
Leaching agent is often selected sulfuric acid (H2SO4), hydrochloric acid (HCl) for use, in reality, often selects sulfuric acid for use.
Select for use the factor that influences leaching yield in the normal pressure acidleach mode to have: the kind of the pH value of the add-on of ore grain size, acid or sour ore deposit ratio, leaching agent, extraction temperature, stirring intensity, extraction time, adding salt and consumption (add salt and can improve the speed of leaching).
In extract technology, adopt leaching yield to characterize the degree that mine tailing leaches:
Wherein, ω
1The content of each valuable metal in the expression original debris, unit is %; ω
2The content of each valuable metal in the expression leach liquor or in the slag, unit is %.
Annotate: during acidleach,, produce H if directly carry out simple acidleach meeting for the mine tailing of sulphide ores
2S has the intensive corrosive nature to hardware, and it is big that the enforcement difficulty is gone up in its industry, the therefore preferred oxygenant (oxygenant air, oxygen, chlorine commonly used) that adds.
In addition, for oxidized ore, passivation phenomenon possibly appear in the normal temperature acidleach, therefore preferably can also carry out activation treatment to mine tailing.Activation method commonly used has:
(1) thermal activation changes mineral structure, forms and realize through elevated temperature;
(2) wet-process activation reacts through wet chemistry and to change mineral composition;
(3) mechanical activation through the refinement mineral, increases specific surface and realizes.
In the specific implementation, need composition according to mine tailing take appropriate measures and avoid the generation of above-mentioned situation.Therefore, the scheme of amplification has sulfuric acid oxygen to press leaching, chlorine to leach.
In the present embodiment, can but be not limited to adopt following dump leaching mode to carry out extract technology to handle:
Wherein, dump leaching is the important leaching method of processing low-grade copper oxide ore.Select for use sulfuric acid to carry out dump leaching at normal temperatures and pressures as the one of which; Implement the dump leaching engineering and need leach chemistry and engineering test fully; Generally include: the mineral composition of ore, composition, chemistry and determination of physical appearance, dissolve the grade of copper, leaching property, perviousness, leaching velocity, acid consumption etc. like total copper and acid.
In the art breading of carrying out dump leaching, the dump leaching significant parameter that needs to confirm has granularity, spray leaching liquid speed and the heap of ore high.
The method of dump leaching test mainly contains post and soaks with test reactor and leach.Because breadboard condition is limited, direct leaching in dumps is difficult to realize, mainly utilizes post to soak and carry out.Therefore must design post as requested soaks experiment.
Post soaks Experimental design and comprises: post, liquid collecting container, immersion liquid recycle pump, pH measurement, regulation system etc. are soaked in (1), also have ventilation system sometimes.(2) soak the material of post: PVC plastics, synthetic glass or other acid resisting material.(3) particle size diameter of ore should be less than 5%cm, and general single-column is high by 1.5～6.0, aspect ratio 3～40.
The parameter of investigating has: the acid consumption in ore deposit, leaching yield change, the cycle of final leaching yield, leaching and ore grain size relation, leaching, reasonably leach system (solid-to-liquid ratio, rate of percolation, spraying intensity, resting period etc.).
In dump leaching is handled, adopt leaching yield to characterize the degree that mine tailing leaches:
Wherein, ω
1The content of each non-ferrous metal in the expression original debris, unit is %; ω
2The content of each non-ferrous metal in the expression leach liquor or in the slag, unit is %.
In the present embodiment, can but be not limited to adopt following biology to leach (claim again bacterium leach) mode to carry out extract technology and handle:
It mainly is the method for processing low-grade copper-sulphide ores that bacterium is leached.
When adopting bioleaching process, preferably in soaking heap, increase ventilation system, be beneficial to accelerate leaching rate.Vent-pipe is placed in and soaks the heap bottom, is equipped with fan with low voltage and forms the ventilation system of soaking heap.Spraying intensity was generally 5～25L/ (hm when bacterium was leached
2).
The bacterium leaching need be inoculated bacterial classification in soaking heap, need solve a series of problems such as preferred, domestication, cultivation of bacterial classification thus.In the bacterium leaching process, growth of bacterium and breeding are key factors.The ample supply of temperature, pH and redox potential, air and nutritive ingredient that the growth needs of bacterium is suitable, and the infringement that as far as possible reduces objectionable impurities and factor.The domestication of ore-leaching bacteria.Generally in experiment, accomplish through shake flask test.
The laboratory study of bacteria heap leaching is that industrial dump leaching production provides foundation.Confirm the soaking property of bacterial oxidation (shake flask test) of ore character, ore, the optimization processing condition (soaking column test) that bacterium is leached, the treatment process and the optimization of leach liquor through experimental study.
1, shake flask test:
The grinding fineness of the sample ore in this test is generally-40 (300 orders), cultivates base unit weight and is generally 90mL (250mL Erlenmeyer flask) or 180mL (500mL Erlenmeyer flask), inoculation liquid 10～20mL, ore deposit amount 5%～10%.Its technology is referring to shown in Figure 2.
At first; Ore is joined basic medium and volumetric molar concentration is in the sulfuric acid of 10% concentration; Alkaline minerals neutralization issues the reflection of endophytic bacteria turnover chemistry in the effect of bacterium and air, adopts through the vibration of constant temperature shaking table to make; Tentatively carrying out solid, liquid separates; Filter then, wash and further carry out solid, liquid and separate and to obtain leach liquor and to soak slag, can further adsorb the exchange test analysis leach liquor, can also further slag be dried so that further make an experiment analysis to soaking.
A kind of practical implementation principle schematic that leaches embodiment that provides for present embodiment shown in Figure 3; Referring to shown in Figure 3; Post soaks Experimental design and comprises: post 301, immersion liquid accommodating groove 302, immersion liquid recycle pump 303, pH measurement, regulation system etc. are leached in (1), also have ventilation system sometimes.(2) material of leaching post 301: PVC plastics, synthetic glass or other acid resisting material.(3) particle size diameter of ore should be less than 5%cm; (4) general single-column is high by 1.5～6.0, aspect ratio 3～40.
Specifically comprise following key step:
Ore is seated in the Porous Base that leaches post 301 and fills up the acidproof filter cloth of last layer earlier; Filling thickness is about 5cm, the granularity block test sample ore 304 greater than 2mm on acidproof filter cloth then; Then size is evenly loaded test sample ore 304 equably as far as possible; At last 2cm thickness, the granularity block test sample ore 304 greater than 2mm is arranged approximately, make flow through as far as possible equably each position of ore pillar 304 of immersion liquid, reach the best and soak the ore deposit effect at the top loading of ore pillar.Soak in the process of post in that mine tailing ore 304 is packed into, it is moistening to adopt the dilute sulphuric acid of PH=1.8 that ore 304 surfaces are carried out, and as far as possible evenly adorns post then.
After ore preimpregnation ore 304 fills, promptly begin to drip the pouring ore repeatedly with the dilution heat of sulfuric acid about pH=1.8, in ore 304 in consumption acid gangue, till the pH value is basicly stable.PH of leaching solution is regulated with 20% dilution heat of sulfuric acid at any time, makes the pH value stabilization about 2.0.
Cloth liquid fallow system; Over top leaching post 301 is provided with header tank 306; The bottom of header tank 306 is provided with outlet pipe 3061; The spout of outlet pipe 3061 is positioned at the top of leaching post 301, and outlet pipe 3061 is provided with under meter 3062, thereby regulates the flow that flows to the acid immersion liquid 307 of leaching post 301 in the header tank 306 through this under meter 3062.Acid immersion liquid 307 in the header tank 306 flows into from the top of leaching post 301 and leaches post 301; Flow through mine tailing 304; Flow out to immersion liquid receiving tank 302 from the bottom of leaching post 301 at last; Immersion liquid receiving tank 302 is communicated with through valve 3031 with an immersion liquid recycle pump 303, and immersion liquid recycle pump 303 is communicated with header tank 306, and immersion liquid recycle pump 303 can be with the immersion acid solution in the immersion liquid receiving tank 302 through immersion liquid recycle pump 303 to header tank 306.In immersion liquid receiving tank 302, also be connected with air 308 through air flowmeter 3081, can in immersion liquid receiving tank 302, add oxidizing gas through air 308, wherein gas flow is regulated control through air flowmeter 3081.Adopt the leach liquor of pH value stabilization about 2.0 in the present embodiment, adopt a pouring mode to carry out cloth liquid and leach, cloth liquid intensity is 0.4～0.7mL/cm
2.min, carry out the leaching system of having holidays by turns.The employing system of having holidays by turns, helping soaking the ore deposit agent, to infiltrate ore inner, increases ore space oxygen level in the ore pillar 304, improves the leaching rate of bacterial growth reproduction speed and copper.Can in leaching post 301, TM 307 be set in the present embodiment, thus can be according to the temperature of ore 304, and the controlled temperature regulation system is handled so that carry out heat-activated.
The parameter of leach investigating has: the acid consumption in ore deposit, the pH of process and Eh change, the upgrowth situation of bacterium, metallic element leaching yield change, the cycle of final leaching yield, leaching and ore grain size relation, leaching, reasonably leach system (solid-to-liquid ratio, rate of percolation, spraying intensity, resting period etc.).
Characterize the degree that mine tailing leaches with leaching yield:
Wherein, ω
1The content of each non-ferrous metal in the expression original debris, unit is %; ω
2The content % of each non-ferrous metal in the expression leach liquor or in the slag.
Fig. 4 is the application principle synoptic diagram of bacterium amplification culture groove in the present embodiment, and referring to diagram, this culture tank comprises support 401; Support is provided with cell body 403; In cell body 403, be placed with and contain bacteria culture fluid 404, above cell body 403, be provided with agitator motor 405, the stirring rake of agitator motor 405 stretches into containing in the bacteria culture fluid of cell body 403; Thereby accelerate to contain the bacterial reproduction speed in the bacteria culture fluid through stirring; Improve bacteria content, tapered in the bottom of cell body 403, be communicated with air 402 in the bottom of this taper through air flowmeter 408.So that improve the air content in the cell body 403 through this air 402, further improve the reproduction speed of bacterium.
Fig. 5 soaks the expanding test process flow diagram for a kind of biological post that provides in the present embodiment.Referring to diagram, this method comprises that mainly pre-treatment to ore (if the mine tailing granularity is thinner, carries out pre-treatment and make it be the pelletizing shape carrying out need carrying out in advance when dump leaching or bacterium are leached mine tailing stone.); After processing, ore is carried out fragmentation, dress post; Adopt extract technology to carry out bacterium acid solution (before soaking can but be not limited to adopt mode shown in Figure 4 to carry out the bacterium amplification culture) then and soak the mine tailing stone that leaches in the post; Obtain containing the leach liquor (significant parameter in the leach liquor that contains Ni, Cu is the content of some position, bacterial number and copper nickel ion in pH value, the solution) of Ni, Cu, leach liquor is carried out solution-treated: leach liquor is carried out the valuable metal solid (being mainly Ni, Cu) that continuous adsorption exchanges and the electrodeposition processing obtains gathering.
More than the technical scheme that the embodiment of the invention provided has been carried out detailed introduction; Used concrete example among this paper the principle and the embodiment of the embodiment of the invention are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. the processing recovery method of a mine tailing remaining copper nickel metal is characterized in that, comprising:
Adopt extract technology to handle to said mine tailing;
Adopt the plate press box to suppress the mine tailing that said leaching is handled, leach the leach liquor of said mine tailing, obtain isolating said leach liquor and soak slag;
Mode through the absorption exchange is extracted the valuable metal in the said leach liquor.
2. the processing recovery method of mine tailing remaining copper nickel metal according to claim 1 is characterized in that,
Adopt extract technology to handle to said mine tailing, specifically:
Under normal pressure, adopt the dilute sulphuric acid spray to soak said mine tailing, and in the mixture of said sulfuric acid and said mine tailing, add oxygenant.
3. the processing recovery method of mine tailing remaining copper nickel metal according to claim 2 is characterized in that,
After adopting the dilute sulphuric acid spray to soak said mine tailing, also comprise:
Heat the mixture of said sulfuric acid and said mine tailing.
4. the processing recovery method of mine tailing remaining copper nickel metal according to claim 2 is characterized in that,
Said oxygenant is: air, oxygen or chlorine.
5. the processing recovery method of mine tailing remaining copper nickel metal according to claim 1 is characterized in that,
Adopt extract technology to handle to said mine tailing, specifically:
Said mine tailing is inserted in the leaching post;
Over top at said leaching post is provided with header tank; The bottom of said header tank is provided with outlet pipe; The spout of said outlet pipe is positioned at the top of said leaching post, and the acid immersion liquid in the said header tank flows into said leaching post from the top of said leaching post, flows through said mine tailing; Flow out to the immersion liquid receiving tank from the bottom of said leaching post; Said immersion liquid receiving tank is communicated with through valve with a pump housing, and the said pump housing is communicated with said header tank, and the said pump housing can be with the immersion acid solution recycle pump in the said immersion liquid receiving tank to said header tank.
6. the processing recovery method of mine tailing remaining copper nickel metal according to claim 5 is characterized in that,
Said leaching post is: lass lining or plastics diafiltration post.
7. according to the processing recovery method of claim 5 or 6 described mine tailing remaining copper nickel metals, it is characterized in that,
The particle size diameter of said mine tailing is less than 5%cm.
8. according to the processing recovery method of claim 5 or 6 described mine tailing remaining copper nickel metals, it is characterized in that,
The height of said leaching post is 1.5～6.0 meters, and the ratio of its camber and diameter is: 3～40.
9. the processing recovery method of mine tailing remaining copper nickel metal according to claim 1 is characterized in that,
Acid immersion liquid in the said header tank is for comprising germy acid immersion liquid.
10. the processing recovery method of mine tailing remaining copper nickel metal according to claim 1 is characterized in that,
Before in said mine tailing being inserted the leaching post, also comprise:
The acidproof filter cloth in pad shop on the Porous Base of said leaching post,
Adopt the surface of the moistening said mine tailing ore of dilute sulphuric acid of PH=1.8;
Said mine tailing is inserted in the leaching post, specifically:
Laying depth is 5 millimeters on said acidproof filter cloth, and granularity is greater than 2 millimeters block mine tailing sample,
Above said block mine tailing sample, in said leaching post, evenly load mine tailing stone then, form the mine tailing cylinder,
Be 5 millimeters at the top loading thickness of said mine tailing cylinder then again, granularity is greater than 2 millimeters block mine tailing sample;
Acid immersion liquid in the said header tank also comprises before flowing into said leaching post from the top of said leaching post:
Adopt the dilute sulphuric acid of PH=1.8 to spray said mine tailing cylinder from the top of said leaching post in advance, flow into said immersion liquid receiving tank from the bottom of said leaching post, the pH value of each the mine tailing mineral surface in said mine tailing cylinder all is stabilized in till 1.8;
The dilution heat of sulfuric acid of adding 20% is regulated in said immersion liquid receiving tank; The pH value stabilization that makes the acid immersion liquid in the said immersion liquid receiving tank is 2.0; Then the acid immersion liquid in the said immersion liquid receiving tank is evacuated to said header tank; Make said acid immersion liquid flow into said leaching post, flow through said mine tailing, flow out to the immersion liquid receiving tank from the bottom of said leaching post from the top of said leaching post.
11. the processing recovery method of mine tailing remaining copper nickel metal according to claim 1 is characterized in that,
Adopt extract technology to handle to said mine tailing, specifically:
Spray contains the liquid of bacterium on tailings pile, and said mine tailing is immersed in the said liquid that contains bacterium,
Bottom at said tailings pile is provided with vent-pipe, and said vent-pipe is connected with blower fan, and said vent-pipe is used for the input air in the off line said tailings pile of the driving of said blower fan bottom.
12. the processing recovery method of mine tailing remaining copper nickel metal according to claim 11 is characterized in that,
With the spraying intensity of 5～25L/hm2, spray contains the liquid of bacterium on tailings pile.
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| CN112546532A (en) * | 2020-12-25 | 2021-03-26 | 昆明理工大学 | Method and device for passivating heavy metals in tailings by gas-solid phase vulcanization crystallization-microcapsule |
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| CN101736157A (en) * | 2009-12-14 | 2010-06-16 | 北京有色金属研究总院 | Process for absorbing and extracting valuable metal ions in leachate of laterite nickel ore by applying immobilized room temperature ionic liquid |
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| CN101736157A (en) * | 2009-12-14 | 2010-06-16 | 北京有色金属研究总院 | Process for absorbing and extracting valuable metal ions in leachate of laterite nickel ore by applying immobilized room temperature ionic liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112546532A (en) * | 2020-12-25 | 2021-03-26 | 昆明理工大学 | Method and device for passivating heavy metals in tailings by gas-solid phase vulcanization crystallization-microcapsule |
| CN112546532B (en) * | 2020-12-25 | 2021-10-29 | 昆明理工大学 | Method and device for passivating heavy metals in tailings by gas-solid phase vulcanization crystallization-microcapsule |
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