CN107297264A - A kind of low grade gold ore heap leaching method crushed based on high electric field pulse - Google Patents
A kind of low grade gold ore heap leaching method crushed based on high electric field pulse Download PDFInfo
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- CN107297264A CN107297264A CN201710658198.6A CN201710658198A CN107297264A CN 107297264 A CN107297264 A CN 107297264A CN 201710658198 A CN201710658198 A CN 201710658198A CN 107297264 A CN107297264 A CN 107297264A
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- 238000002386 leaching Methods 0.000 title claims abstract description 147
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000010931 gold Substances 0.000 title claims abstract description 80
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 80
- 230000005684 electric field Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 45
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 6
- 239000004571 lime Substances 0.000 claims abstract description 6
- 238000001179 sorption measurement Methods 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 22
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 11
- 238000012216 screening Methods 0.000 claims description 11
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 2
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 7
- 239000010419 fine particle Substances 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 3
- 238000003795 desorption Methods 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 description 10
- 239000011707 mineral Substances 0.000 description 10
- 235000010755 mineral Nutrition 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 238000005507 spraying Methods 0.000 description 7
- 230000002572 peristaltic effect Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 229910052683 pyrite Inorganic materials 0.000 description 4
- 239000011028 pyrite Substances 0.000 description 4
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- 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
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of low grade gold ore heap leaching method crushed based on high electric field pulse, comprise the following steps：1. tcrude ore by open circuit coarse crushing and it is closed circuit in it is broken reach suitable granularity after, feeding high electric field pulse disintegrating machine handled；2. with high electric field pulse disintegrating machine to tcrude ore carry out open circuit it is in small, broken bits, product is carried out combined and staged with Wet oscillating screen and classifying equipoment；3. thinner overflow product feeds all sliming cyanidation leaching system, and sand setting and coarse-grained material build up ore deposit heap and carry out dump leaching after being mixed with appropriate alkali tune lime；4. golden liquid and tailings are obtained after the completion of leaching, your liquid obtains golden product through Adsorption and desorption and after smelting.Compared with prior art, the present invention proposes to use high electric field pulse break process low grade gold ore, and its product gold exposure is high, fine particle content is few, can substantially shorten period of heap leaching, reduce leaching agent consumption, improves gold leaching rate.While dump leaching, fine fraction graded product is also reclaimed.
Description
Technical field
The present invention relates to metallurgical technology field, more particularly, to a kind of low grade gold ore crushed based on high electric field pulse
Heap leaching method.
Background technology
As China's high-grade metal mineral resources are almost exhausted, contain the important of abundant low-grade metal mineral products resource
Property is highlighted all the more.For low grade gold ore, heap Leaching is one of current most widely used extracting method.It is used as one kind
Liquid-solid reaction process, the efficiency that dump leaching is handled in actual production depends primarily on the exposure and leaching solution of gold in ore deposit heap
Permeability.Dump leaching raw ore needs to improve the exposure of gold grain, but existing Mechanical Crushing method meeting by broken pretreatment
A large amount of fine grained ores are supervened, excessive fine grained ore can reduce the space inside ore deposit heap, so as to form channel even
Block, permeability of the serious reduction leaching solution in ore deposit heap.Therefore heap Leaching pair is met while Mechanical Crushing can not be very well
Gold grain exposure and the infiltrative requirement of leaching solution.
High electric field pulse crushing technology is application of the Pulse Power Techniques in break process.High electric field pulse crushing technology
Trigger electrical breakdown inside the ore being immersed in water using pulse generating unit, so that tens of to hundreds of joules of energy be existed
It is discharged within several milliseconds inside ore particles, the material internal around the discharge channel of plasma formation produces powerful
Pressure wave, cause the disintegration of ore particles.
High electric field pulse crushing technology can discharge energy in ore particles on the border of metal and nonmetal deposits thing crystal grain
Amount triggers ore to disintegrate, thus possess selective crushing compared with high grade ore particle, make ore broken or solve along intercrystalline boundary
From, produce in breakdown products a large amount of cracks and product particle size narrow range and few fine particle content the advantages of.High electric field pulse is broken
Broken technology is expected to further improve the gold recovery of dump leaching operation, shortens extraction time and reduction solvent leaching reagent consumption.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is based on high-tension electricity arteries and veins
Broken low grade gold ore heap leaching method is broken through, is carried out according to the following steps：1. tcrude ore is broken in passing through open circuit coarse crushing and being closed circuit reaches
To after suitable granularity, feeding high electric field pulse disintegrating machine is handled；2. tcrude ore is carried out with high electric field pulse disintegrating machine
Open circuit is in small, broken bits, and product is carried out combined and staged with Wet oscillating screen and classifying equipoment；3. thinner overflow product feeds full mud cyanogen
Change leaching system, sand setting and coarse-grained material build up ore deposit heap and carry out dump leaching after being mixed with appropriate alkali tune lime；After the completion of 4. leaching
To golden liquid and tailings, your liquid obtains golden product through Adsorption and desorption and after smelting.The characteristics of by high electric field pulse crushed product
Combine with the advantage of Gold Ore Heap Leaching, to reach the metal recovery rate for further improving dump leaching operation, shortening extraction time
With the purpose of reduction solvent leaching reagent consumption.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of low grade gold ore heap leaching method crushed based on high electric field pulse, is comprised the following steps：
（1）Tcrude ore sequentially pass through open circuit coarse crushing and it is closed circuit in it is broken, obtain it is closed circuit in broken product；
（2）Broken product feeds that open circuit is carried out in high electric field pulse disintegrating machine is in small, broken bits in closed circuit；
（3）Product in small, broken bits is leached through dump leaching, full mud and obtains purpose product, and golden product is obtained by purpose product.
The step（3）Specially：
31：Product in small, broken bits feeds Wet oscillating screen；
32：Wet oscillating screen screenings is fed in hydraulic classification equipment, and the overflow product of hydraulic classification equipment classification is fed
All sliming cyanidation leaching system, obtains gold loaded carbon product；
After the upper coarse-grained material of Wet oscillating screen sieve and the sand setting of hydraulic classification equipment classification are mixed with soda lime, it is sent to together
Stockyard carries out building heap, and is leached using leaching agent, and your liquid for building heap collection carries out Static Adsorption using activated carbon, isolates
Gold loaded carbon product and lean solution, lean solution return to stockyard and carry out circulated sprinkling；
33：The gold loaded carbon product feeding solution bothrium obtained in step 32, obtains purpose product and recovered carbon, recovered carbon
All sliming cyanidation leaching system and your liquid for building heap collection are recycled into step 32.
The screen size of the Wet oscillating screen is 3 ~ 6mm, and the screenings of Wet oscillating screen coordinates hydraulic classification equipment to enter
The control of -0.074mm grain size contents is 75 ~ 90% in row classification, obtained overflow product.
The Wet oscillating screen uses wet type double-deck screen shale shaker, and the on-the-sieve material of wet type double-deck screen shale shaker is divided with waterpower respectively
The sand setting addition lime feeding stockyard of level sizing of equipment, forms the ore deposit heap of different grain size scope.
The maximum particle size of the overflow product of the hydraulic classification equipment classification is 0.10 ~ 0.15mm.
The open circuit coarse crushing uses coarse crushing disintegrating machine, and the upper size boundary of coarse crushing disintegrating machine is 150 ~ 250mm；
It is described it is closed circuit in broken use broken disintegrating machine and in broken vibratory sieve, the open loop coarse crushing product that open circuit coarse crushing is obtained all feeds
The broken disintegrating machine in, in broken disintegrating machine obtain it is primary in broken product pass through in the effect of broken vibratory sieve be classified, in broken shake
Broken disintegrating machine continues broken during thick material is returned on the sieve of dynamic sieve, in the screenings of broken vibratory sieve be broken product in closed circuit, close
Broken product granularity is less than the maximum material size of high electric field pulse disintegrating machine during broken control is closed circuit in road.
The maximum material size scope of broken disintegrating machine is 80 ~ 150mm in described；
The screen size of broken vibratory sieve is 40 ~ 80mm in described.
Broken double-deck screen shale shaker during broken vibratory sieve is used in described, in the upper thick material of upper sieve sieve of broken double-deck screen shale shaker return
Broken disintegrating machine continues broken in, in the lower screen oversize of broken double-deck screen shale shaker feed in high electric field pulse disintegrating machine and carry out
Open circuit is in small, broken bits, under the lower screen sieve of the high electric field pulse crushed product that high electric field pulse disintegrating machine is obtained broken double-deck screen shale shaker with
Thing is mixed as product in small, broken bits, feeds Wet oscillating screen.
The broken maximum material size of the high electric field pulse is 40 ~ 80mm, and crest value of impulse voltage is 30 ~ 500kV, pulse
Energy is 50 ~ 2000J, and pulse rise time is to enter full mud in the μ s of 5ns ~ 500, the overflow product of hydraulic classification equipment classification
The mass fraction of the gold ore of Cyanide Leaching system accounts for 8% ~ 25%.
Compared with prior art, the present invention has advantages below：
1 and mechanical crusher（Jaw crusher, gyratory crusher, high-pressure roller mill etc.）Dump leaching process after broken is compared, high
Piezoelectric pulses crushing technology is being available for the modes such as the crack of leaching solution infiltration by monomer dissociation, exposed to particle surface and generation
While improving gold grain exposure, its product particle size is thicker compared to Mechanical Crushing and fine particle content is few, therefore, it is possible to more preferable
While meet dump leaching processing it is infiltrative to gold grain exposure and leaching solution require.While dump leaching, fine fraction classification
Product is also reclaimed.
2nd, when handling low grade gold ore using dump leaching method, its product gold exposure is high, fine particle content is few, high-tension electricity
The broken use of pulse can be played a part of shortening period of heap leaching, reduce leaching agent consumption, improve gold leaching rate, solve with
Toward dump leaching time length, leaching effect it is poor the problem of, can more economical the gold ore of extremely low-grade be reclaimed, it is to avoid resource
Waste.
3rd, proved by contrast experiment, the present invention in product gold leaching rate apparently higher than conventional jaw disintegrating machine product, and
The consumption of leaching agent can be reduced, plays a part of the synergy that lowers consumption, if initial pile ore is carried out into classification builds heap, be can further improve
The leaching rate of gold.
Brief description of the drawings
Fig. 1 is the flow chart of the inventive method；
Fig. 2 is the process chart of experiment 1；
Fig. 3 is the process chart of experiment 2；
Fig. 4 is the process chart of experiment 3；
Fig. 5 is the process chart of experiment 4.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of low grade gold ore heap leaching method crushed based on high electric field pulse, is comprised the following steps：
（1）Tcrude ore sequentially pass through open circuit coarse crushing and it is closed circuit in it is broken, obtain it is closed circuit in broken product.
Coarse crushing of opening a way uses coarse crushing disintegrating machine, and the upper size boundary of coarse crushing disintegrating machine is 150 ~ 250mm, and coarse crushing disintegrating machine is circle
One kind in the conventional crushers such as conic crusher, jaw crusher or impact breaker；
Broken disintegrating machine broken vibratory sieve with broken use in closed circuit, the open loop coarse crushing product for the suitable grade that open circuit coarse crushing is obtained is complete
Portion's broken disintegrating machine in feeding, in broken disintegrating machine obtain it is primary in broken product pass through in the effect of broken vibratory sieve be classified,
In broken vibratory sieve sieve on thick material return in broken disintegrating machine continue broken, in the screenings of broken vibratory sieve be broken production in closed circuit
Product, it is closed circuit in it is broken control it is closed circuit in broken product granularity be less than high electric field pulse disintegrating machine maximum material size.
In broken disintegrating machine maximum material size scope be 80 ~ 150mm；In broken disintegrating machine and screen size be 40 ~ 80mm
In broken vibratory sieve composition closed circuit crushing flow.In broken vibratory sieve can also use in broken double-deck screen shale shaker, in broken double-deck vibration
Broken disintegrating machine continues broken during the upper thick material of upper sieve sieve of sieve is returned to, in the lower screen oversize of broken double-deck screen shale shaker feed
Progress open circuit is in small, broken bits in high electric field pulse disintegrating machine, and the high electric field pulse crushed product that high electric field pulse disintegrating machine is obtained is with
The lower screen screenings of broken double-deck screen shale shaker is mixed as product in small, broken bits, feeds Wet oscillating screen, is put down with will pass through raising pan feeding
Equal granularity improves the broken efficiency of high electric field pulse.
（2）Broken product, which is fed, in closed circuit carries out that open circuit is in small, broken bits in high electric field pulse disintegrating machine, and product in small, broken bits feeds wet type and shaken
Dynamic sieve.What is utilized is that high electric field pulse manufactures the advantage that crack makes leachate facilitate access for bulky grain in ore, and leachate is more
It is to enter to be leached inside ore particles along crack mostly.
The broken maximum material size of high electric field pulse is 40 ~ 80mm, and crest value of impulse voltage is 30 ~ 500kV, for example：
50kV, 200 kV, 300 kV etc., pulse energy are 50 ~ 2000J, and pulse rise time is the μ s of 5ns ~ 500, hydraulic classification equipment
The mass fraction for the gold ore for entering all sliming cyanidation leaching system in the overflow product of classification accounts for 8% ~ 25%.
Step（2）In, gravitational separation equipment can also be set, and gravitational separation equipment selects the broken obtained machine production in small, broken bits of high electric field pulse
Particulate gold in product.
（3）Product in small, broken bits is leached through dump leaching, full mud and obtains purpose product, and golden product is obtained by purpose product.Specific steps
It is as follows：
31：Product in small, broken bits feeds Wet oscillating screen.
32：On the one hand：Wet oscillating screen screenings is fed in hydraulic classification equipment, the overflow of hydraulic classification equipment classification
Product feeds all sliming cyanidation leaching system, obtains gold loaded carbon product.Hydraulic classification equipment is spiral classifier or hydraulic cyclone
Device, the maximum particle size of the overflow product of hydraulic classification equipment classification is 0.10 ~ 0.15mm；
The screen size of Wet oscillating screen is 3 ~ 6mm, and the screenings of Wet oscillating screen coordinates hydraulic classification equipment to be classified, obtained
To overflow product in -0.074mm grain size contents control 75 ~ 90%, feed all sliming cyanidation leaching system；
On the other hand：The upper coarse-grained material of Wet oscillating screen sieve and the sand setting of hydraulic classification equipment classification are mixed with appropriate alkali tune lime
After conjunction, stockyard being sent to together and carries out building heap, and leached using leaching agent, your liquid for building heap collection is carried out using activated carbon
Static Adsorption, isolates gold loaded carbon product and lean solution, and lean solution returns to stockyard and carries out circulated sprinkling.Acticarbon can be replaced
Change charcoal non activated adsorbent into；
Leaching agent can be Cyanide Leaching agent or non-cyanogen leaching agent, if non-cyanogen leaching agent, then leaching agent spraying intensity, pH can be done
Corresponding adjustment；
Wet oscillating screen can also use wet type double-deck screen shale shaker, on-the-sieve material nonjoinder, the oversize of wet type double-deck screen shale shaker
The sand setting addition lime feeding stockyard that material is classified with hydraulic classification equipment respectively, forms the ore deposit heap of different grain size scope, obtains more
Dump leaching effect well.
33：The gold loaded carbon product that the gold loaded carbon product and dump leaching that all sliming cyanidation leaching system is obtained are obtained is respectively fed to desorption
Groove, obtains purpose product and recovered carbon, and recovered carbon enters all sliming cyanidation leaching system in step 32 and collected with heap is built
Your liquid regeneration cycle use.The purpose product that solution bothrium is obtained enters golden smeltery and obtains golden product.
The technique effect that the present invention program is brought is proved below by specific experiment.
Experiment 1
Certain high silicon type low grade gold ore, Gold in Ores content be 0.36g/t, metalliferous mineral using limonite, pyrite as
It is main；The gangue mineral overwhelming majority is quartz.As shown in Fig. 2 using PEX-150 × 250, XPC-60 × 100 to the ore of acquirement
The closed circuit crushing flow progress coarse crushing of the jaw crusher and 26.5mm square hole screens composition of two kinds of models is broken with, it is ensured that ore grain
Degree is respectively less than 26.5mm, then in small, broken bits using PEF-60 × 100 type jaw crusher progress standard-sized sheet roads（Control the row of jaw crusher
Mine mouth width is 4 ~ 7mm）.The screened classification of product after jaw crusher crushing, wherein -0.15mm grade materials（Account for
14.56%）As all sliming cyanidation test sample, 200g samples are taken to feed in the tank diameter that volume is 3L, adding running water makes ore pulp
Concentration is 40%, and it is 11 to add quick lime 1.5kg/t adjustment pH value, and sodium cyanide solution concentration is 1.5g/L, electric speed regulation agitator
Speed setting be 500r/min, the leaching time be 24h.+ 0.15mm grade materials（Account for 85.44%）It is used as column leaching test
Sample, sample is fed in diameter Ф=160mm small-sized leaching post, ore deposit stack height H=650mm, and peristaltic pump spraying intensity is 10L/
M2 h, sodium cyanide solution concentration is 0.8g/L, and closed circuit (lean solution is used as leaching agent reuse) leaches 20 days, clear water is used after the completion of leaching
Wash ore deposit heap 48h.It can obtain two kinds are leached your liquid and leached mud, each sample gold content before and after leaching is determined respectively.
After being crushed through conventional jaw crusher, -0.15mm grade materials post leaching gold leaching rate is 85.31%, leaching agent consumption
For 1.86kg/t；+ 0.15mm grade materials post leaching gold leaching rate is 73.31%, and leaching agent consumption is 1.29kg/t；Raw ore it is comprehensive
It is 75.06% to close leaching rate, and leaching agent consumption is 1.37kg/t.
Experiment 2
Certain high silicon type low grade gold ore, Gold in Ores content be 0.36g/t, metalliferous mineral using limonite, pyrite as
It is main；The gangue mineral overwhelming majority is quartz.As shown in figure 3, using PEX-150 × 250, XPC-60 × 100 to the ore of acquirement
The closed circuit crushing flow progress coarse crushing of the jaw crusher and 26.5mm square hole screens composition of two kinds of models is broken with, it is ensured that ore grain
Degree is respectively less than 26.5mm, then discharges high electric field pulse to ore using self-control high electric field pulse disintegrating machine, and pulse voltage is
200kV, electrode spacing is 50mm, and pulse number is 500 times/kg.Screened point of product after the processing of high electric field pulse disintegrating machine
Level, wherein -0.15mm grade materials（Account for 10.27%）As all sliming cyanidation test sample, it is 3L's to take 200g samples to feed volume
In tank diameter, adding running water makes pulp density be 40%, and it is 11 to add quick lime 1.5kg/t adjustment pH value, and sodium cyanide solution is dense
Spend for 1.5g/L, the speed setting of electric speed regulation agitator is 500r/min, and the leaching time is 24h；+ 0.15mm grade things
Material（Account for 89.73%）As column leaching test sample, sample is fed in diameter Ф=160mm small-sized leaching post, and ore deposit stack height H=
650mm, peristaltic pump spraying intensity is 10L/m2 h, and sodium cyanide solution concentration is 0.8g/L, and closed circuit (lean solution is returned as leaching agent
With) leach 20 days, ore deposit heap 48h is washed after the completion of leaching with clear water.It can obtain two kinds are leached your liquid and leached mud, determine leach respectively
Front and rear each sample gold content.
After being handled through high electric field pulse disintegrating machine, -0.15mm grade materials post leaching gold leaching rate is 94.11%, leaching agent consumption
Measure as 1.77kg/t；+ 0.15mm grade materials post leaching gold leaching rate is 78.36%, and leaching agent consumption is 1.19kg/t；Raw ore
Comprehensive leaching rate is 79.98%, and leaching agent consumption is 1.25kg/t.
Contrasted from the experimental data of above-mentioned experiment 1,2, compared with conventional jaw crumbling method, be through pulse voltage
200kV, electrode spacing is 50mm, after pulse number is 500 times/kg high electric field pulse disintegrating machine processing, the gold ore sample
Gold leaching rate improves about 4.92 percentage points, and Cymag consumption reduces about 8.99%, wherein the leaching gold leaching of+0.15mm coarse contents stock column
Extracting rate improves about 5.05 percentage points, and Cymag consumption reduces about 7.75%.
Experiment 3
Certain high silicon type low grade gold ore, Gold in Ores content be 0.36g/t, metalliferous mineral using limonite, pyrite as
It is main；The gangue mineral overwhelming majority is quartz.As shown in figure 4, using PEX-150 × 250, XPC-60 × 100 to the ore of acquirement
The closed circuit crushing flow progress coarse crushing of the jaw crusher and 26.5mm square hole screens composition of two kinds of models is broken with, it is ensured that ore grain
Degree is respectively less than 26.5mm, then in small, broken bits using PEF-60 × 100 type jaw crusher progress standard-sized sheet roads（Control the row of jaw crusher
Mine mouth width is 4 ~ 7mm）.The screened classification of product after jaw crushing crusher machine, wherein -0.15mm grade materials（Account for
14.11%）As all sliming cyanidation test sample, 200g samples are taken to feed in the tank diameter that volume is 3L, adding running water makes ore pulp
Concentration is 40%, and it is 11 to add quick lime 1.5kg/t adjustment pH value, and sodium cyanide solution concentration is 1.5g/L, electric speed regulation agitator
Speed setting be 500r/min, the leaching time be 24h.- 6.7+0.15mm grade materials（Account for 63.07%）As miniature
Column leaching test sample, sample is fed in diameter Ф=50mm miniature leaching post, ore deposit stack height H=240mm, peristaltic pump spraying intensity
For 10L/m2 h, sodium cyanide solution concentration is 0.8g/L, and open circuit (lean solution not reuse) is leached 10 days, washed after the completion of leaching with clear water
Wash ore deposit heap 48h.+ 6.7mm grade materials（Account for 22.82%）As small-sized column leaching test sample, sample feeds diameter Ф=160mm's
In small-sized leaching post, ore deposit stack height H=650mm, peristaltic pump spraying intensity is 10L/m2 h, and sodium cyanide solution concentration is 0.8g/L,
Closed circuit (lean solution is used as leaching agent reuse) leaches 20 days, washs ore deposit heap 48h after the completion of leaching with clear water.It can obtain your liquid is three kinds leached
And leached mud, each sample gold content before and after leaching is determined respectively.
After being crushed through conventional jaw crusher ,+6.70mm grade materials gold leaching rate is 71.02%, and leaching agent consumption is
1.11kg/t；- 6.70+0.15mm grade materials gold leaching rate is 75.51%, and leaching agent consumption is 1.38kg/t；- 0.15mm
Level material post leaching gold leaching rate is 86.51%, and leaching agent consumption is 1.81kg/t, and the synthesis leaching rate of raw ore is 76.04%, is leached
Agent consumption is 1.38kg/t.
Experiment 4
Certain high silicon type low grade gold ore, Gold in Ores content be 0.36g/t, metalliferous mineral using limonite, pyrite as
It is main；The gangue mineral overwhelming majority is quartz.As shown in figure 5, using PEX-150 × 250, XPC-60 × 100 to the ore of acquirement
The closed circuit crushing flow progress coarse crushing of the jaw crusher and 26.5mm square hole screens composition of two kinds of models is broken with, it is ensured that ore grain
Degree is respectively less than 26.5mm, then discharges high electric field pulse, pulse voltage during processing to ore using self-control high electric field pulse disintegrating machine
For 200kV, electrode spacing is 50mm, and pulse number is 500 times/kg.Product after high electric field pulse crusher in crushing is screened
Classification, wherein -0.15mm grade materials（Account for 9.97%）As all sliming cyanidation test sample, 200g samples are taken to feed volume for 3L
Tank diameter in, adding running water makes pulp density be 40%, and it is 11, sodium cyanide solution to add quick lime 1.5kg/t adjustment pH value
Concentration is 1.5g/L, and the speed setting of electric speed regulation agitator is 500r/min, and the leaching time is 24h.-6.7+0.15mm
Grade material（Account for 64.40%）Test sample is soaked as micro-column, sample is fed in diameter Ф=50mm miniature leaching post, ore deposit heap
Height H=240mm, peristaltic pump spraying intensity is 10L/m2 h, and sodium cyanide solution concentration is 0.8g/L, is opened a way (lean solution not reuse)
Leach 10 days, wash ore deposit heap 48h after the completion of leaching with clear water.+ 6.7mm grade materials（Account for 25.63%）It is used as small-sized column leaching test
Sample, sample is fed in diameter Ф=160mm small-sized leaching post, ore deposit stack height H=650mm, and peristaltic pump spraying intensity is 10L/
M2 h, sodium cyanide solution concentration is 0.8g/L, and closed circuit (lean solution is used as leaching agent reuse) leaches 20 days, clear water is used after the completion of leaching
Wash ore deposit heap 48h.It can obtain three kinds are leached your liquid and leached mud, each sample gold content before and after leaching is determined respectively.
After high electric field pulse crusher in crushing, -0.15mm grade materials post leaching gold leaching rate is 95.64%, leaching agent consumption
Measure as 1.77kg/t；- 6.70+0.15mm grade materials gold leaching rate is 82.64%, and leaching agent consumption is 1.31kg/t；+
6.70mm grade materials gold leaching rate is 74.65%, and leaching agent consumption is 0.93kg/t；The synthesis leaching rate of raw ore is 81.89%,
Leaching agent consumption is 1.26kg/t.
Contrasted from the experimental data of above-mentioned experiment 3,4, compared with conventional jaw crumbling method, be through pulse voltage
200kV, electrode spacing is 50mm, after pulse number is 500 times/kg high electric field pulse disintegrating machine processing, the gold ore sample
Gold leaching rate improves about 5.85 percentage points, and Cymag consumption reduces about 8.74%, wherein -6.70+0.15mm coarse contents stock column soaks
Gold leaching rate improves about 7.13 percentage points, and Cymag consumption reduces about 5.07%；+ 6.7mm coarse contents stock column leaching gold leaching rate is carried
High about 3.63 percentage points, Cymag consumption reduces about 16.22%.
In summary, in low grade gold ore extract technology, product Gold leaching after being handled through high electric field pulse disintegrating machine
Rate can reduce the consumption of leaching agent apparently higher than conventional jaw disintegrating machine product, play a part of the synergy that lowers consumption, if by initial pile
Field ore carries out classification and builds heap, can further improve the leaching rate of gold.Using the heap after high electric field pulse disintegrating machine open circuit crushing
New technology is soaked, low grade gold ore is recycled beneficial to further.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (9)
1. a kind of low grade gold ore heap leaching method crushed based on high electric field pulse, it is characterised in that comprise the following steps：
（1）Tcrude ore sequentially pass through open circuit coarse crushing and it is closed circuit in it is broken, obtain it is closed circuit in broken product；
（2）Broken product feeds that open circuit is carried out in high electric field pulse disintegrating machine is in small, broken bits in closed circuit；
（3）Product in small, broken bits is leached through dump leaching, full mud and obtains purpose product, and golden product is obtained by purpose product.
2. a kind of low grade gold ore heap leaching method crushed based on high electric field pulse according to claim 1, its feature
It is, the step（3）Specially：
31：Product in small, broken bits feeds Wet oscillating screen；
32：Wet oscillating screen screenings is fed in hydraulic classification equipment, and the overflow product of hydraulic classification equipment classification is fed
All sliming cyanidation leaching system, obtains gold loaded carbon product；
After the upper coarse-grained material of Wet oscillating screen sieve and the sand setting of hydraulic classification equipment classification are mixed with soda lime, it is sent to together
Stockyard carries out building heap, and is leached using leaching agent, and your liquid for building heap collection carries out Static Adsorption using activated carbon, isolates
Gold loaded carbon product and lean solution, lean solution return to stockyard and carry out circulated sprinkling；
33：The gold loaded carbon product feeding solution bothrium obtained in step 32, obtains purpose product and recovered carbon, recovered carbon
All sliming cyanidation leaching system and your liquid for building heap collection are recycled into step 32.
3. a kind of low grade gold ore heap leaching method crushed based on high electric field pulse according to claim 2, its feature
It is, the screen size of the Wet oscillating screen is 3 ~ 6mm, and the screenings of Wet oscillating screen coordinates hydraulic classification equipment to be divided
The control of -0.074mm grain size contents is 75 ~ 90% in level, obtained overflow product.
4. a kind of low grade gold ore heap leaching method crushed based on high electric field pulse according to claim 2, its feature
It is, the Wet oscillating screen uses wet type double-deck screen shale shaker, and the on-the-sieve material of wet type double-deck screen shale shaker is respectively and hydraulic classiciation
The sand setting addition lime feeding stockyard of sizing of equipment, forms the ore deposit heap of different grain size scope.
5. a kind of low grade gold ore heap leaching method crushed based on high electric field pulse according to claim 2, its feature
It is, the maximum particle size of the overflow product of the hydraulic classification equipment classification is 0.10 ~ 0.15mm.
6. a kind of low grade gold ore heap leaching method crushed based on high electric field pulse according to claim 1, its feature
It is, the open circuit coarse crushing uses coarse crushing disintegrating machine, and the upper size boundary of coarse crushing disintegrating machine is 150 ~ 250mm；
It is described it is closed circuit in broken use broken disintegrating machine and in broken vibratory sieve, the open loop coarse crushing product that open circuit coarse crushing is obtained all feeds
The broken disintegrating machine in, in broken disintegrating machine obtain it is primary in broken product pass through in the effect of broken vibratory sieve be classified, in broken shake
Broken disintegrating machine continues broken during thick material is returned on the sieve of dynamic sieve, in the screenings of broken vibratory sieve be broken product in closed circuit, close
Broken product granularity is less than the maximum material size of high electric field pulse disintegrating machine during broken control is closed circuit in road.
7. a kind of low grade gold ore heap leaching method crushed based on high electric field pulse according to claim 6, its feature
Be, it is described in broken disintegrating machine maximum material size scope be 80 ~ 150mm；
The screen size of broken vibratory sieve is 40 ~ 80mm in described.
8. a kind of low grade gold ore heap leaching method crushed based on high electric field pulse according to claim 6, its feature
Be, it is described in broken vibratory sieve use in broken double-deck screen shale shaker, in the upper thick material of upper sieve sieve of broken double-deck screen shale shaker return to
In broken disintegrating machine continue broken, in the lower screen oversize of broken double-deck screen shale shaker feed in high electric field pulse disintegrating machine and opened
Road is in small, broken bits, the lower screen screenings of the high electric field pulse crushed product that high electric field pulse disintegrating machine is obtained broken double-deck screen shale shaker with
Mixing feeds Wet oscillating screen as product in small, broken bits.
9. a kind of low grade gold ore heap leaching method crushed based on high electric field pulse according to claim 1, its feature
It is, the broken maximum material size of the high electric field pulse is 40 ~ 80mm, crest value of impulse voltage is 30 ~ 500kV, pulse energy
Measure as 50 ~ 2000J, pulse rise time is to enter full mud cyanogen in the μ s of 5ns ~ 500, the overflow product of hydraulic classification equipment classification
The mass fraction for changing the gold ore of leaching system accounts for 8% ~ 25%.
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| CN114100807A (en) * | 2021-11-25 | 2022-03-01 | 南方科技大学 | Control method, system, device and equipment for pre-enriching ores based on surface type electrode |
| CN114378026A (en) * | 2021-12-17 | 2022-04-22 | 中建材蚌埠玻璃工业设计研究院有限公司 | Method for preparing electronic grade high-purity quartz sand |
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| CN101940972A (en) * | 2010-09-09 | 2011-01-12 | 中国恩菲工程技术有限公司 | Ore-crushing device |
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Effective date of registration: 20231130 Address after: 561500 Songlin Group 1, Louxia Community, Louxia Town, Pu'an County, Qianxinan Buyei and Miao Autonomous Prefecture, Guizhou Province Patentee after: Guizhou Asia Pacific Mining Co.,Ltd. Address before: 401120 No.107 dataguzhong Road, Xiantao street, Yubei District, Chongqing Patentee before: Chongqing Super Star Technology Co.,Ltd. Effective date of registration: 20231130 Address after: 401120 No.107 dataguzhong Road, Xiantao street, Yubei District, Chongqing Patentee after: Chongqing Super Star Technology Co.,Ltd. Address before: 350108 new campus of Fuzhou University, No. 2, Xue Yuan Road, University Town, Minhou street, Minhou, Fujian. Patentee before: FUZHOU University |