CN107297264B - A kind of low grade gold ore heap leaching method being crushed based on high electric field pulse - Google Patents
A kind of low grade gold ore heap leaching method being crushed based on high electric field pulse Download PDFInfo
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- CN107297264B CN107297264B CN201710658198.6A CN201710658198A CN107297264B CN 107297264 B CN107297264 B CN 107297264B CN 201710658198 A CN201710658198 A CN 201710658198A CN 107297264 B CN107297264 B CN 107297264B
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- 238000002386 leaching Methods 0.000 title claims abstract description 137
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000010931 gold Substances 0.000 title claims abstract description 78
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 78
- 230000005684 electric field Effects 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 35
- 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 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 5
- 239000004571 lime Substances 0.000 claims abstract description 5
- 238000001179 sorption measurement Methods 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 229910052799 carbon Inorganic materials 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 15
- 238000012216 screening Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 3
- 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 13
- 239000010419 fine particle Substances 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000003795 desorption Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 14
- 229910052500 inorganic mineral Inorganic materials 0.000 description 10
- 239000011707 mineral Substances 0.000 description 10
- 235000010755 mineral Nutrition 0.000 description 10
- 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 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 6
- 230000002572 peristaltic effect Effects 0.000 description 6
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 5
- 238000005507 spraying Methods 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
- 238000005259 measurement Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 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
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003610 charcoal Substances 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
- 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
- 239000007921 spray Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000005406 washing Methods 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)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to it is a kind of based on high electric field pulse be crushed low grade gold ore heap leaching method, comprising the following steps: 1. tcrude ore by open circuit coarse crushing and it is closed circuit in it is broken reach suitable granularity after, be sent into high electric field pulse crusher handled；2. it is fine crushing open a way to tcrude ore with high electric field pulse crusher, product Wet oscillating screen and classifying equipoment carry out combined and staged；3. thinner overflow product, which is fed, builds up the progress dump leaching of mine heap after all sliming cyanidation leaching system, sand setting and coarse-grained material are mixed with appropriate alkali tune lime；4. obtaining golden liquid and tailings 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 product gold exposure is high, fine particle content is few, can be obviously shortened period of heap leaching, reduce leaching agent consumption, improves gold leaching rate.While dump leaching, fine fraction graded product is also recycled.
Description
Technical field
The present invention relates to metallurgical technology fields, more particularly, to a kind of low grade gold ore being crushed based on high electric field pulse
Heap leaching method.
Background technique
As China's high-grade metal mineral resources are almost exhausted, contain the important of low-grade metal mineral products resource abundant
Property more highlights.For low grade gold ore, heap Leaching is one of current most widely used extracting method.As one kind
Liquid-solid reaction process, the exposure and leaching solution that the efficiency of dump leaching processing depends primarily on gold in actual production are in mine heap
Permeability.Dump leaching raw ore needs to improve the exposure of gold particle, 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 gap inside mine heap, to form channel even
Blocking, the serious permeability for reducing leaching solution in mine heap.Therefore meet heap Leaching pair while Mechanical Crushing cannot be very well
Gold particle 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
Cause electrical breakdown inside ore in water impregnating using pulse generating unit, so that tens of to hundreds of joules of energy be existed
It is discharged into inside ore particles within several milliseconds, the material internal around the discharge channel that plasma is formed generates powerful
Pressure wave, lead to the disintegration of ore particles.
High electric field pulse crushing technology can discharge energy on the boundary of metal and nonmetal deposits object crystal grain in ore particles
Amount causes ore and disintegrates, thus have selective crushing compared with high grade ore particle, keep ore broken along intercrystalline boundary or solve
From, the advantages that a large amount of cracks and product particle size narrow range and fine particle content are few is being generated in breakdown products.High electric field pulse is broken
Broken technology is expected to further increase the gold recovery of dump leaching operation, shorten extraction time and reduce solvent leaching reagent dosage.
Summary 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 to be based on high-voltage electricity arteries and veins
Break through broken low grade gold ore heap leaching method, sequentially include the following steps: 1. tcrude ore by open circuit coarse crushing and it is closed circuit in broken reach
To after suitable granularity, it is sent into high electric field pulse crusher and is handled；2. being carried out with high electric field pulse crusher to tcrude ore
It opens a way fine crushing, product Wet oscillating screen and classifying equipoment carry out combined and staged；3. thinner overflow product feeds full mud cyanogen
Change leaching system, sand setting and coarse-grained material build up mine heap and carry out dump leaching after mixing with appropriate alkali tune lime；4. after the completion of 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 increasing dump leaching operation, shortening extraction time
With the purpose for reducing solvent leaching reagent dosage.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of low grade gold ore heap leaching method being crushed based on high electric field pulse, comprising the following steps:
(1) tcrude ore successively by open circuit coarse crushing and it is closed circuit in it is broken, obtain broken product in closed circuit；
(2) in closed circuit broken product feed carry out opening a way in high electric field pulse crusher it is fine crushing；
(3) product fine crushing leaches to obtain purpose product through dump leaching, full mud, obtains golden product by purpose product.
The step (3) specifically:
31: product fine crushing 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 given
Enter to 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, send together
Entering to stockyard to carry out building heap, and is leached using leaching agent, your liquid for building heap collection carries out Static Adsorption using active carbon, point
Gold loaded carbon product and lean solution are separated out, lean solution carries out circulated sprinkling back to stockyard；
33: the gold loaded carbon product obtained in step 32 is sent into solution bothrium, obtains purpose product and recovered carbon, and recycling is lived
Property charcoal enter step that all sliming cyanidation leaching system in 32 and your liquid for building that heap is collected are recycled.
The screen size of the Wet oscillating screen is 3 ~ 6mm, the screenings of Wet oscillating screen cooperate hydraulic classification equipment into
Row is classified, and the control of -0.074mm grain size content is 75 ~ 90% in 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 of grade sizing of equipment is sent into stockyard, forms the mine heap of different grain size range.
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 crusher, and the upper size boundary of coarse crushing crusher is 150 ~ 250mm；
It is described it is closed circuit in broken use broken crusher and in broken vibrating screen, the open loop coarse crushing product that open circuit coarse crushing obtains is whole
Broken crusher in feeding, in the obtained primary of broken crusher broken product pass through in the effect of broken vibrating screen be classified, in
On the sieve of broken vibrating screen rough material return in broken crusher continue to be crushed, in broken vibrating screen screenings be it is closed circuit in broken production
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 crusher maximum material size.
The maximum material size range of broken crusher is 80 ~ 150mm in described；
The screen size of broken vibrating screen is 40 ~ 80mm in described.
In described broken vibrating screen use in broken double-deck screen shale shaker, in the upper sieve of broken double-deck screen shale shaker sieve upper rough material and return
Broken crusher continues to be crushed in, in the lower screen oversize of broken double-deck screen shale shaker feed in high electric field pulse crusher and carry out
It opens a way fine crushing, under the lower screen sieve of the high electric field pulse crushed product that high electric field pulse crusher obtains broken double-deck screen shale shaker in
Object mixing is used as product fine crushing, 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 the μ s of 5ns ~ 500, enters full mud in 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 invention has the following advantages that
1, with mechanical crusher (jaw crusher, gyratory crusher, high-pressure roller mill etc.) broken dump leaching process phase
Than high electric field pulse crushing technology is passing through monomer dissociation, is exposed to particle surface and generating the crack permeated for leaching solution
Etc. modes while improve gold particle exposure, product particle size is thicker compared to Mechanical Crushing and fine particle content is few, therefore energy
Meet dump leaching processing while enough more preferable to gold particle exposure and the infiltrative requirement of leaching solution.While dump leaching, particulate
Grade graded product is also recycled.
2, when using dump leaching method processing low grade gold ore, product gold exposure is high, fine particle content is few, high-voltage electricity
The broken use of pulse can be played the role of shortening period of heap leaching, reduce leaching agent consumption, improve gold leaching rate, solve with
Toward dump leaching time length, the problem of leaching effect difference, more economical the gold ore of extremely low-grade can be recycled, avoid resource
Waste.
3, it being proved by comparative experiments, the present invention is apparently higher than conventional jaw crusher product in product gold leaching rate, and
The dosage that can be reduced leaching agent plays the role of the synergy that lowers consumption, if initial pile field ore, which is carried out classification, builds heap, can further improve
The leaching rate of gold.
Detailed description of the invention
Fig. 1 is the flow chart of the method for the present invention；
Fig. 2 is the process flow chart for testing 1；
Fig. 3 is the process flow chart for testing 2；
Fig. 4 is the process flow chart for testing 3；
Fig. 5 is the process flow chart for testing 4.
Specific 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 being crushed based on high electric field pulse, comprising the following steps:
(1) tcrude ore successively by open circuit coarse crushing and it is closed circuit in it is broken, obtain broken product in closed circuit.
Coarse crushing of opening a way uses coarse crushing crusher, and the upper size boundary of coarse crushing crusher is 150 ~ 250mm, and coarse crushing crusher is circle
One of conventional crushers such as conic crusher, jaw crusher or impact breaker；
Broken crusher broken vibrating screen in broken use, the open loop coarse crushing for the suitable grade that open circuit coarse crushing obtains produce in closed circuit
Product all feed in broken crusher, in the obtained primary of broken crusher broken product pass through in the effect of broken vibrating screen divided
Grade, in broken vibrating screen sieve on rough material return in broken crusher continue to be crushed, in broken vibrating screen screenings be it is closed circuit in
Broken 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 crusher maximum material size.
In broken crusher maximum material size range be 80 ~ 150mm；In broken crusher and screen size be 40 ~ 80mm
In broken vibrating screen form closed circuit crushing process.In broken vibrating screen can also use in broken double-deck screen shale shaker, in the broken double-deck vibration
The upper sieve of sieve sieve upper rough material return in broken crusher continue to be crushed, in the lower screen oversize of broken double-deck screen shale shaker feed
Open a way in high electric field pulse crusher fine crushing, the high electric field pulse crushed product that high electric field pulse crusher obtains is in
The lower screen screenings mixing of broken double-deck screen shale shaker is used as product fine crushing, feeds Wet oscillating screen, flat 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 opening a way fine crushing in high electric field pulse crusher, product fine crushing feeds wet type vibration
Dynamic sieve.What is utilized is that high electric field pulse manufactures the advantages of crack makes leachate facilitate access for bulky grain in ore, and leachate is more
It is mostly to enter inside ore particles to be leached along crack.
The broken maximum material size of high electric field pulse is 40 ~ 80mm, and crest value of impulse voltage is 30 ~ 500kV, such as:
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%.
In step (2), gravitational separation equipment can also be set, gravitational separation equipment selects the broken obtained machine production fine crushing of high electric field pulse
Particulate gold in product.
(3) product fine crushing leaches to obtain purpose product through dump leaching, full mud, obtains golden product by purpose product.Specific steps
It is as follows:
31: product fine crushing 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 are 0.10 ~ 0.15mm；
The screen size of Wet oscillating screen is 3 ~ 6mm, and the screenings cooperation hydraulic classification equipment of Wet oscillating screen is divided
Grade, the control of -0.074mm grain size content feeds all sliming cyanidation leaching system 75 ~ 90% in obtained overflow product；
On the other hand: Wet oscillating screen sieve the sand setting of upper coarse-grained material and hydraulic classification equipment classification with appropriate alkali tune stone
After ash mixing, it is sent to stockyard together and carries out building heap, and is leached using leaching agent, builds your liquid of heap collection using active carbon
Static Adsorption is carried out, gold loaded carbon product and lean solution are isolated, lean solution carries out circulated sprinkling back to stockyard.Acticarbon can
To be substituted for charcoal non activated adsorbent；
Leaching agent can be Cyanide Leaching agent or non-cyanogen leaching agent, if non-cyanogen leaching agent, then leaching agent spraying intensity, pH
It can adjust accordingly；
Wet oscillating screen can also use wet type double-deck screen shale shaker, on-the-sieve material nonjoinder, the sieve of wet type double-deck screen shale shaker
Upper material is sent into stockyard with the sand setting addition lime of hydraulic classification equipment classification respectively, forms the mine heap of different grain size range, obtains
Obtain preferably dump leaching effect.
33: the gold loaded carbon product that the gold loaded carbon product and dump leaching that all sliming cyanidation leaching system obtains obtain is respectively fed to desorb
Slot, obtains purpose product and recovered carbon, and recovered carbon enters step all sliming cyanidation leaching system in 32 and builds heap collection
Your liquid regeneration cycle use.The purpose product that solution bothrium obtains enters golden smeltery and obtains golden product.
Technical effect brought by the present invention program is proved below by specific experiment.
Experiment 1
Certain high silicon type low grade gold ore, Gold in Ores content are 0.36g/t, and metalliferous mineral is with limonite, Huang Tie
Based on mine；The gangue mineral overwhelming majority is quartz.As shown in Fig. 2, the ore to acquirement uses PEX-150 × 250, XPC-60
The closed circuit crushing process progress coarse crushing of the jaw crusher and 26.5mm square hole screen composition of × 100 two kinds of models is broken in, it is ensured that
Ore grain size is respectively less than 26.5mm, then carries out standard-sized sheet road (control jaw crushing fine crushing using the type jaw crusher of PEF-60 × 100
The gape width of machine is 4 ~ 7mm).The screened classification of the smashed product of jaw crusher, wherein -0.15mm grade material
(accounting for 14.56%) is used as all sliming cyanidation test sample, and 200g sample is taken to feed in the stirred tank that volume is 3L, and tap water, which is added, to be made
Pulp density is 40%, and it is 11 that quick lime 1.5kg/t adjustment pH value, which is added, and sodium cyanide solution concentration is 1.5g/L, and electric speed regulation stirs
The revolving speed for mixing device is set as 500r/min, and the leaching time is for 24 hours.+ 0.15mm grade material (accounting for 85.44%) is soaked as column
Test sample, sample are fed in the small-sized leaching column of diameter Ф=160mm, mine stack height H=650mm, and peristaltic pump spraying intensity is
10L/m2 h, sodium cyanide solution concentration are 0.8g/L, and closed circuit (lean solution is as leaching agent reuse) is leached 20 days, are used after the completion of leaching
Clear water washs mine heap 48h.Two kinds of your liquid of leaching and leached mud can be obtained, each sample gold content of front and back is leached in measurement respectively.
After the crushing of conventional jaw crusher, it is 85.31% that -0.15mm grade material column, which soaks gold leaching rate, leaching agent consumption
For 1.86kg/t；It is 73.31% that+0.15mm grade material column, which soaks gold leaching rate, and leaching agent consumption is 1.29kg/t；Raw ore it is comprehensive
Closing leaching rate is 75.06%, and leaching agent consumption is 1.37kg/t.
Experiment 2
Certain high silicon type low grade gold ore, Gold in Ores content are 0.36g/t, and metalliferous mineral is with limonite, Huang Tie
Based on mine；The gangue mineral overwhelming majority is quartz.As shown in figure 3, the ore to acquirement uses PEX-150 × 250, XPC-60
The closed circuit crushing process progress coarse crushing of the jaw crusher and 26.5mm square hole screen composition of × 100 two kinds of models is broken in, it is ensured that
Ore grain size is respectively less than 26.5mm, then discharges high electric field pulse, pulse voltage to ore using self-control high electric field pulse crusher
For 200kV, electrode spacing 50mm, pulse number is 500 times/kg.Treated that product is screened for high electric field pulse crusher
Classification, wherein -0.15mm grade material (accounting for 10.27%) is used as all sliming cyanidation test sample, taking 200g sample to feed volume is 3L
Stirred tank in, tap water, which is added, makes pulp density 40%, and it is 11 that quick lime 1.5kg/t adjustment pH value, which is added, sodium cyanide solution
Concentration is 1.5g/L, and the revolving speed of electric speed regulation blender is set as 500r/min, and the leaching time is for 24 hours；+ 0.15mm grade
Material (accounting for 89.73%) is used as column leaching test sample, and sample is fed in the small-sized leaching column of diameter Ф=160mm, and mine stack height H=
650mm, peristaltic pump spraying intensity are 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, mine heap 48h is washed with clear water after the completion of leaching.Two kinds of your liquid of leaching and leached mud can be obtained, measurement is leached respectively
Each sample gold content of front and back.
After the processing of high electric field pulse crusher, it is 94.11% that -0.15mm grade material column, which soaks gold leaching rate, leaching agent consumption
Amount is 1.77kg/t；It is 78.36% that+0.15mm grade material column, which soaks gold leaching rate, and leaching agent consumption is 1.19kg/t；Raw ore
Comprehensive leaching rate is 79.98%, and leaching agent consumption is 1.25kg/t.
It is compared by the experimental data of above-mentioned experiment 1,2 it is found that compared with conventional jaw crumbling method, is through pulse voltage
200kV, electrode spacing 50mm, after the high electric field pulse crusher processing that pulse number is 500 times/kg, 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 content 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 are 0.36g/t, and metalliferous mineral is with limonite, Huang Tie
Based on mine；The gangue mineral overwhelming majority is quartz.As shown in figure 4, the ore to acquirement uses PEX-150 × 250, XPC-60
The closed circuit crushing process progress coarse crushing of the jaw crusher and 26.5mm square hole screen composition of × 100 two kinds of models is broken in, it is ensured that
Ore grain size is respectively less than 26.5mm, then carries out standard-sized sheet road (control jaw crushing fine crushing using the type jaw crusher of PEF-60 × 100
The gape width of machine is 4 ~ 7mm).The screened classification of the broken product of jaw crusher, wherein -0.15mm grade material
(accounting for 14.11%) is used as all sliming cyanidation test sample, and 200g sample is taken to feed in the stirred tank that volume is 3L, and tap water, which is added, to be made
Pulp density is 40%, and it is 11 that quick lime 1.5kg/t adjustment pH value, which is added, and sodium cyanide solution concentration is 1.5g/L, and electric speed regulation stirs
The revolving speed for mixing device is set as 500r/min, and the leaching time is for 24 hours.- 6.7+0.15mm grade material (accounting for 63.07%) conduct
Micro-column soaks test sample, and sample is fed in the miniature leaching column of diameter Ф=50mm, mine stack height H=240mm, peristaltic pump spray
Intensity is 10L/m2 h, and sodium cyanide solution concentration is 0.8g/L, and open circuit (lean solution not reuse) leaches 10 days, with clear after the completion of leaching
Water washing mine heap 48h.+ 6.7mm grade material (accounting for 22.82%) be used as small-sized column leaching test sample, sample feed diameter Ф=
In the small-sized leaching column of 160mm, mine 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 as leaching agent reuse) are leached 20 days, wash mine heap 48h with clear water after the completion of leaching.Three kinds can be obtained
Your liquid and leached mud are leached, each sample gold content of front and back is leached in measurement respectively.
After the crushing of conventional jaw crusher ,+6.70mm grade material gold leaching rate is 71.02%, and leaching agent consumption is
1.11kg/t；- 6.70+0.15mm grade material gold leaching rate is 75.51%, and leaching agent consumption is 1.38kg/t；- 0.15mm
Grade material column 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 are 0.36g/t, and metalliferous mineral is with limonite, Huang Tie
Based on mine；The gangue mineral overwhelming majority is quartz.As shown in figure 5, the ore to acquirement uses PEX-150 × 250, XPC-60
The closed circuit crushing process progress coarse crushing of the jaw crusher and 26.5mm square hole screen composition of × 100 two kinds of models is broken in, it is ensured that
Ore grain size is respectively less than 26.5mm, then discharges high electric field pulse to ore using self-control high electric field pulse crusher, handles clock pulse
Rushing voltage is 200kV, and electrode spacing 50mm, pulse number is 500 times/kg.The broken product of high electric field pulse crusher
Screened classification takes 200g sample to feed body wherein -0.15mm grade material (accounting for 9.97%) is used as all sliming cyanidation test sample
Product is in the stirred tank of 3L, and tap water, which is added, makes pulp density 40%, and it is 11 that quick lime 1.5kg/t adjustment pH value, which is added, cyaniding
Sodium solution concentration is 1.5g/L, and the revolving speed of electric speed regulation blender is set as 500r/min, and the leaching time is for 24 hours.-6.7+
0.15mm grade material (accounting for 64.40%) soaks test sample as micro-column, and sample feeds the miniature leaching column of diameter Ф=50mm
Interior, mine stack height H=240mm, peristaltic pump spraying intensity is 10L/m2 h, and sodium cyanide solution concentration is 0.8g/L, (lean solution of opening a way
Not reuse) it leaches 10 days, mine heap 48h is washed with clear water after the completion of leaching.+ 6.7mm grade material (accounting for 25.63%) is as small-sized
Column leaching test sample, sample are fed in the small-sized leaching column of diameter Ф=160mm, mine stack height H=650mm, and peristaltic pump spray is strong
Degree is 10L/m2 h, and sodium cyanide solution concentration is 0.8g/L, and closed circuit (lean solution is as leaching agent reuse) leaches 20 days, leach and complete
Mine heap 48h is washed with clear water afterwards.Three kinds of your liquid of leaching and leached mud can be obtained, each sample gold content of front and back is leached in measurement respectively.
After high electric field pulse is crushed crusher machine, it is 95.64% that -0.15mm grade material column, which soaks gold leaching rate, leaching agent consumption
Amount is 1.77kg/t；- 6.70+0.15mm grade material gold leaching rate is 82.64%, and leaching agent consumption is 1.31kg/t；+
6.70mm grade material 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.
It is compared by the experimental data of above-mentioned experiment 3,4 it is found that compared with conventional jaw crumbling method, is through pulse voltage
200kV, electrode spacing 50mm, after the high electric field pulse crusher processing that pulse number is 500 times/kg, 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 content stock column soaks
Gold leaching rate improves about 7.13 percentage points, and Cymag consumption reduces about 5.07%；+ 6.7mm coarse content stock column leaching gold leaching rate mentions
About 3.63 percentage points high, Cymag consumption reduces about 16.22%.
In summary, in low grade gold ore extract technology, the product Gold leaching after the processing of high electric field pulse crusher
Rate is apparently higher than conventional jaw crusher product, and can be reduced the dosage of leaching agent, plays the role 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 crusher open circuit crushing
New process is soaked, is conducive to further recycle low grade gold ore.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of low grade gold ore heap leaching method being crushed based on high electric field pulse, which comprises the following steps:
(1) tcrude ore successively by open circuit coarse crushing and it is closed circuit in it is broken, obtain broken product in closed circuit；
(2) in closed circuit broken product feed carry out opening a way in high electric field pulse crusher it is fine crushing；
(3) product fine crushing leaches to obtain purpose product through dump leaching, full mud, obtains golden product by purpose product；
The step (3) specifically:
31: product fine crushing 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, your liquid for building heap collection carries out Static Adsorption using active carbon, isolates
Gold loaded carbon product and lean solution, lean solution carry out circulated sprinkling back to stockyard；
33: the gold loaded carbon product obtained in step 32 is sent into solution bothrium, obtains purpose product and recovered carbon, recovered carbon
It enters step all sliming cyanidation leaching system in 32 and builds that your liquid that heap is collected is recycled；
The maximum material size of the high electric field pulse crusher is 40~80mm, and crest value of impulse voltage is 30~500kV, pulse
Energy is 50~2000J, and pulse rise time is the μ s of 5ns~500, is entered in the overflow product of hydraulic classification equipment classification complete
The mass fraction of the gold ore of mud Cyanide Leaching system accounts for 8%~25%.
2. a kind of low grade gold ore heap leaching method being crushed based on high electric field pulse according to claim 1, feature
It is, the screen size of the Wet oscillating screen is 3~6mm, and the screenings cooperation hydraulic classification equipment of Wet oscillating screen carries out
It is classified, the control of -0.074mm grain size content is 75~90% in obtained overflow product.
3. a kind of low grade gold ore heap leaching method being crushed based on high electric field pulse according to claim 1, 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 of sizing of equipment is sent into stockyard, forms the mine heap of different grain size range.
4. a kind of low grade gold ore heap leaching method being crushed based on high electric field pulse according to claim 1, feature
It is, the maximum particle size of the overflow product of the hydraulic classification equipment classification is 0.10~0.15mm.
5. a kind of low grade gold ore heap leaching method being crushed based on high electric field pulse according to claim 1, feature
It is, the open circuit coarse crushing uses coarse crushing crusher, and the upper size boundary of coarse crushing crusher is 150~250mm；
It is described it is closed circuit in broken use broken crusher and in broken vibrating screen, the open loop coarse crushing product that open circuit coarse crushing obtains all feeds
The broken crusher in, in the obtained primary of broken crusher broken product pass through in the effect of broken vibrating screen be classified, in broken vibration
On the sieve of dynamic sieve rough material return in broken crusher continue to be crushed, in the screenings of broken vibrating screen be broken product in closed circuit, close
The broken maximum material size for controlling broken product granularity in closed circuit and being less than high electric field pulse crusher in road.
6. a kind of low grade gold ore heap leaching method being crushed based on high electric field pulse according to claim 5, feature
Be, it is described in broken crusher maximum material size range be 80~150mm；
The screen size of broken vibrating screen is 40~80mm in described.
7. a kind of low grade gold ore heap leaching method being crushed based on high electric field pulse according to claim 5, feature
Be, it is described in broken vibrating screen use in broken double-deck screen shale shaker, in the upper sieve of broken double-deck screen shale shaker sieve upper rough material and return to
In broken crusher continue to be crushed, in the lower screen oversize of broken double-deck screen shale shaker feed in high electric field pulse crusher and opened
Road is fine crushing, the lower screen screenings of the high electric field pulse crushed product that high electric field pulse crusher obtains broken double-deck screen shale shaker in
Mixing is used as product fine crushing, feeds Wet oscillating screen.
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