CN110215986A - It is a kind of to strengthen the high electric field pulse preprocess method that scheelite is broken and sorts - Google Patents
It is a kind of to strengthen the high electric field pulse preprocess method that scheelite is broken and sorts Download PDFInfo
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- CN110215986A CN110215986A CN201910603343.XA CN201910603343A CN110215986A CN 110215986 A CN110215986 A CN 110215986A CN 201910603343 A CN201910603343 A CN 201910603343A CN 110215986 A CN110215986 A CN 110215986A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
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- 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
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
- B02C2019/183—Crushing by discharge of high electrical energy
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- 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
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
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- Disintegrating Or Milling (AREA)
Abstract
A kind of to strengthen the high electric field pulse preprocess method that scheelite is broken and sorts, using high electric field pulse device, method sequentially includes the following steps: (1) starting water pump, and water continuously enters pulsation insulating cylinder body, is discharged from the water outlet of product collector；(2) scheelite ore is passed through and is transmitted to pulse insulating cylinder body to ore storage bin；It is deposited on sieve, top is contacted with high-field electrode；(3) power supply is opened, discharges between electric high-field electrode and high voltage negative, makes scheelite ore reduction；(4) it is rotated by eccentric wheel, makes bullet periodically up and down motion of pulsing；Move the part of scheelite ore small particles on sieve gradually downward；(5) broken scheelite ore enters product collector.The valuable mineral content of crushed product can be improved in method of the invention, improves crushed product liberation degree of minerals, is conducive to the reduction of subsequent processing process energy consumption, saves entreprise cost.
Description
Technical field
The invention belongs to technical field of mineral processing, in particular to a kind of to strengthen the high-voltage electricity arteries and veins that scheelite is broken and sorts
Rush preprocess method.
Background technique
Tungsten is a kind of high density refractory metal, has good thermal conductivity, higher compression modulus and springform
Amount and outstanding Properties of High Temperature Creep, tungsten metal is sufficiently stable under room temperature and is insoluble in various strong acid or aqueous slkali, extensive
Applied to the every field such as civilian, industrial, military project, it is known as " industrial tooth "；World's tungsten resource reserves are 3,300,000 tons,
1,900,000 tons of middle China Tungsten resource reserve, occupies first place in the world；Tungsten resource is widely distributed and abundant in China, and wherein scheelite accounts for about
Tungsten ore total amount 70%, wolframite are then 20%, remaining 10% be mixed mineral；All be over a long period of time to exploit based on wolframite,
With the reduction of China's wolframite resource, the efficient utilization and recycling for improving scheelite are to the supply of guarantee tungsten resource and national economy
Sound development have grand strategy meaning.
The white tungsten CaWO in China4Resources reserve amount is big, wherein most commonly seen Scheelite Deposit is Skarn Deposit, gangue mine
Object typically contains fluorite, calcite etc., these mineral disseminated grain sizes are superfine, and correlation is close, and property is crisp；Due to scheelite and arteries and veins
The physicochemical properties difference of stone ore object is larger, and especially prominent with electric conductivity, interfacial property, this allows for electric pulse and is broken into
It may；Because traditional scheelite is easy argillization in grinding process, and similar to gangue mineral surface chemical property, can float
It is big to sort difficulty for similar temperament；So improve the liberation degree of minerals of mineral before selected, the similar arteries and veins of timely separation chemistry property
Stone ore object, it is most important to the optimization of subsequent Beneficiation flowsheet.
Summary of the invention
The object of the present invention is to provide the high electric field pulse preprocess methods that a kind of reinforcing scheelite is broken and sorts, and use
When high electric field pulse is crushed tourmaline, discharge channel easily develops along mineral interface, generates plasma explosion, heat in mineral interface
Stress expansion etc., and then forming shock wave and the destruction field of force causes crackle to generate and extend, and ultimately causes the gross fracture of ore,
Improve the effect of subsequent ore grinding processing.
Method of the invention use high electric field pulse device, the device include to ore storage bin, pulse insulating cylinder body, support frame,
Palsating equipment, product collector and power supply；Pulse insulating cylinder body top be cylindrical shape, lower part be it is inverted round table-like, top is set
There is cover board, cover board is equipped with channel and is connected to ore storage bin；The side wall of insulating cylinder body is cased with support frame, and bottom and palsating equipment assemble
Together；Palsating equipment by pulsation insulating cylinder body, agitate diaphragm, gape, pulsation bullet, connecting rod and eccentric group at arteries and veins
The side wall of dynamic insulating cylinder body is equipped with water inlet and is connected to water pump, and the bottom for insulating cylinder body of pulsing connects at the top of diaphragm with agitating
It connects, the bottom of diaphragm is agitated to connect with gape, pulsation bullet is arranged in gape, pulse bullet bottom and connecting rod
One end is hinged, and the other end of connecting rod is hinged with eccentric wheel, and eccentric wheel passes through motor driven；The diaphragm material of agitating is rubber
Glue；Gape is connected to the feed inlet of product collector, and the side wall of product collector is equipped with water outlet；It is set on the cover board
There are multiple telescopic devices, telescopic device is made of copper rod, high-field electrode, upper fixed block, lower fixed block and spring, and upper fixed block is solid
Surely it is connected to copper rod top, lower fixed block is fixed on the cover board, and copper rod passes through lower fixed block and is slidingly sealed company with lower fixed block
It connects, high-field electrode is fixedly connected with copper rod bottom, and spring top is fixedly connected with lower fixed block, and spring bottom end and high-field electrode are solid
Fixed connection, and spring is looped around outside copper rod；The copper rod of each telescopic device is connected in parallel on two groups of higfh-tension ceramicses by high-voltage conducting wires
On capacitor, high voltage ceramic capacitor is assembled together with ignition transformer is exchanged, and exchange ignition transformer passes through one-way pressure-regulating
Device is assembled together with power supply；The bottom end of pulse insulating cylinder body is fixedly connected with grounding electrode, and grounding electrode passes through support bridge joint
Ground；The bottom end of the cylindrical portion of pulse insulating cylinder body is fixedly installed with sieve, and multiple high voltage negatives are equipped on sieve；
Method sequentially includes the following steps:
1, start water pump, continuously enter water in the pulsation insulating cylinder body of palsating equipment, and from the water outlet of product collector
The continuous discharge of mouth；Water is full of inside pulsation insulating cylinder body and product collector as dielectric, and liquid level is higher than high-field electrode
Bottom end；
2, scheelite ore is placed in in ore storage bin, and by being transmitted in pulse insulating cylinder body to ore storage bin；Scheelite mine
Stone is deposited on sieve, and the scheelite ore at top is contacted with high-field electrode；
3, power supply is opened, electric current exchanges ignition transformer boosting and six voltage doubling rectifing circuits are whole through single-phase voltage regulator transformation
High voltage direct current is exported after stream boosting, is charged to high voltage ceramic capacitor, when super-pressure ceramic capacitor voltage reaches breakdown potential
After pressure value, the gas switch conducting being attached thereto exports high electric field pulse, is loaded into copper rod through high-voltage conducting wires and is transmitted to high pressure
Instantaneous high pressure electric field is formd on electrode, between high-field electrode and high voltage negative；When the voltage on high-field electrode reaches breakdown potential
It when pressure value, discharges between high-field electrode and high voltage negative, makes scheelite ore reduction；When the voltage on high-field electrode again
When reaching breakdown voltage value, formation is discharged next time；When broken scheelite ore particles are less than mesh size, through sieve
Into palsating equipment；
4, it is rotated by motor driven eccentric wheel, makes bullet periodically up and down motion of pulsing；When pulsation bullet is upward
When movement, ascending current is formed in palsating equipment, and when bullet of pulsing moves downward, descending water is formed in palsating equipment
Stream；The ore on sieve is acted on by the lifting of water flow, makes the part of scheelite ore small particles on sieve gradually downward
It is mobile；
5, broken scheelite ore enters in product collector by palsating equipment.
In above-mentioned high electric field pulse device, axis and the motor of eccentric wheel are assembled together, and connecting rod is hinged with eccentric wheel
Position be located at the part other than axis.
In above-mentioned high electric field pulse device, the water inlet of water pump is connected to the water outlet of sink, the water inlet of sink with
Water outlet connection on product collector side wall.
In above-mentioned high electric field pulse device, the material of pulse insulating cylinder body is PVC, and the material of support frame and cover board is not
Become rusty steel.
In above-mentioned high electric field pulse device, the material of sieve is stainless steel, and the aperture of sieve is 2~10mm.
In above-mentioned high electric field pulse device, the material of high-field electrode and high voltage negative is stainless steel；High-field electrode is to fall
The cone set, high voltage negative are cone.
It is lower to be insulated between fixed block and cover board by insulating washer in above-mentioned high electric field pulse device.
In above-mentioned high electric field pulse device, to being connected to below the discharge port and cover board of ore storage bin, feed inlet is equipped with valve.
It is equipped with inclination sieve in above-mentioned high electric field pulse device, in product collector, tilts the folder of sieve and horizontal plane
20 °~40 ° of angle, inclination sieve are located above water outlet, and the aperture for tilting sieve is 2~10mm.
In above-mentioned high electric field pulse device, the material for insulating cylinder body of pulsing is PVC.
In above-mentioned high electric field pulse device, spring is compressed spring, and the length of the nature of spring is greater than high-voltage electricity
The distance between pole and lower fixed block.
In the above method, with being discharged after scheelite ore reduction from sieve, the scheelite ore on sieve is gradually decreased；
High-field electrode is gradually reduced under the elastic force effect of spring, is contacted until working as upper fixed block with lower fixed block, at this time high-field electrode
There is gap between high voltage negative, prevents short circuit.
In the above method, the adjacent time interval discharged twice is discharge cycle, and pulsation bullet up and down motion is once
Pulsation period；It is equal to the positive integer times of discharge cycle by adjusting the motor speed control pulsation period；The discharge cycle with
Level-one input voltage and the variation of ball gap spacing, wherein level-one input voltage is in 45~90V, ball gap 15~30mm of spacing, per minute
Pulse number is at 5~45 times, then discharge cycle is 1/5~1/45min.
Above-mentioned supply voltage 220V, frequency 50Hz.
Above-mentioned single-phase voltage regulator, exchange ignition transformer and high voltage ceramic capacitor forms the pulse power, for exporting
Electric pulse, electric pulse rising time are 50ns~500ns；The rising time is the time of pulse shaping waveform.
Above-mentioned high voltage negative is evenly distributed on sieve, for improving electric crushing efficiency, strengthens crushing effect.
Above-mentioned breakdown voltage value is 20kV.
Above-mentioned palsating equipment drives water and makes that film is agitated to generate alternate expansion and contraction, in palsating equipment and pulse
It is alternatively formed raising and lowering water flow inside insulating cylinder body, disperses the mineral grain for meeting partial size in time by ascending current, leads to
It crosses descent waterflow and carries out ore discharge, improve crushing efficiency and prevented crushing.
In the above method, electric discharge occurs inside scheelite ore, and rising time is less than 10-5When the second, in nanosecond arteries and veins
Under punching effect, using water as dielectric, dielectric strength is greater than scheelite ore, so edge has inside bulky grain scheelite ore
Plasma channel is concatenated to form between mineral and gangue mineral interface；Broken little particle scheelite ore passes through high voltage negative
Crusher chamber bottom centrum lower part is fallen into, is influenced since the water flow of pulser chromatographs, little particle can preferentially be sunk to the bottom, through palsating equipment
It is discharged into product collector, is separated by solid-liquid separation etc., in case being used continuously when subsequent broken, grinding operation；Final particle
Size depends on the size of sieve pore, according to requiring to be adjusted slot size.
In the above method, rising time is less than 10-5When the second, under nanosecond pulse effect, the dielectric strength of water is instead
Greater than ore, therefore water energy is enough used as dielectric；In discharge process, discharge channel easily develops along mineral interface, in mineral interface
Plasma explodes, thermal stress expands etc. is generated, and then forming shock wave and the destruction field of force causes crackle to generate and extend, finally
Cause the gross fracture of ore；High electric field pulse is broken can not only to make ore reduction, but also produces on ore internal mineral interface
Raw running crack and crack, and then improve mineral cleavage and sorting property；The exploitation of electric pulse equipment is promoted, there is important war
Slightly meaning saves operation cost of enterprises, reduces the waste of resource on the basis of guaranteeing valuable mineral quality, is enterprise
Sustainable development and strong competition provide most solid foundation guarantee, a seat can be monopolized in the industry competition of changeable situation
Ground.
It is optimal intercrystalline cracking mode that high electric field pulse is broken, can not only make ore reduction, but also in ore
Running crack and crack are generated on portion's mineral crystal boundary, and then improve mineral cleavage and sorting property；Useful mine in scheelite ore
The electrical properties such as the dielectric constant of object and gangue mineral, conductivity differ greatly, when being crushed metallic ore using high electric field pulse,
Discharge channel easily develops along mineral interface, generates plasma explosion, thermal stress expansion etc. in mineral interface, and then form impact
Wave and the destruction field of force cause crackle to generate and extend, and ultimately cause the gross fracture of ore.Make purpose mine by selective crushing
Object will be completely dissociated, it is ensured that the quantity of monomer dissociation valuable mineral is able to satisfy the requirement of follow-up separation technique in milling product, reduces
Subsequent processing energy consumption.
Traditional sample broke method is compared, breaking method of the invention has many good qualities: short processing time, production efficiency
Height, low energy consumption；It equipped with pulse ore discharge device, is compared with the crushing plant of equal-wattage, processing capacity is expected to improve 1.5 to 2 times；
Crumbling method is broken along crystal boundary, promotes the generation and development of grain boundaries micro-crack, improves selective crushing, and then improve mineral cleavage
Characteristic, and do not destroy mineral crystal form；It is easy to clean, without cross contamination；After high electric field pulse is broken, ore strength can be big
It is big to reduce, it is contemplated that reduce by 30% or more ore grinding energy consumption；The liberation degree of minerals for considerably increasing valuable mineral, helps to improve ore
Separation index.
Main innovation point of the invention is: pulsation ore discharge device, timely ore discharge, the invalid electric shattering process of reduction, at raising
Manage efficiency；Self-service telescopic device, it is ensured that high-voltage motor and ore point-face contact can greatly reduce the waste of energy, energy damage
It consumes small, guarantees the generation of discharge channel, improve energy utilization rate；Pointed high voltage negative and sieve combine, and save space, meanwhile,
Improve electric pulse crushing efficiency；The broken equipment of high electric field pulse electric discharge carries out selective crushing to ore, and broken production can be improved
The valuable mineral content of product improves crushed product liberation degree of minerals, is conducive to the reduction of subsequent processing process energy consumption, saves enterprise
Cost.
Detailed description of the invention
Fig. 1 is the high electric field pulse apparatus structure schematic diagram in the embodiment of the present invention；
Fig. 2 is the telescopic device structural schematic diagram in the embodiment of the present invention；
Fig. 3 is the palsating equipment structural schematic diagram in the embodiment of the present invention；
Fig. 4 is the product collector structural schematic diagram in Fig. 1；
Fig. 5 is the sieve overlooking structure diagram (label × part be high voltage negative position) in Fig. 1；
Fig. 6 is Fig. 1 middle-high-pressure ceramic capacitor and the circuit diagram that exchanges ignition transformer part；
Fig. 7 is level-one input voltage and pulse number curve graph in the embodiment of the present invention under different ball gap spacing conditions；
In figure, 1, give ore storage bin, 2, pulse insulating cylinder body, 3, support frame, 4, grounding electrode, 5, palsating equipment, 6, product receive
Storage, 7, water pump, 8, dielectric (water), 9, power supply, 10, exchange ignition transformer, 11, high voltage ceramic capacitor (have six times
Voltage rectifier), 12, cover board, 13, high-voltage conducting wires, 14, copper rod, 15, spring, 16, high-field electrode, 17, high voltage negative, 18, sieve
Net, 19, single-phase voltage regulator, 20, rubber washer, 21, lower fixed block, 22, upper fixed block, 23, pulsation insulating cylinder body, 24, water inlet
Mouthful, 25, agitate film, 26, gape, 27, eccentric wheel, 28, connecting rod, 29, pulsation bullet, 30, inclination sieve, 31, water outlet
Mouthful.
Specific embodiment
The present invention will be further described with reference to embodiments.
Insulating layer coating is applied outside copper rod, spring, lower fixed block and the upper fixed block used in the embodiment of the present invention, for preventing
Only the part of non-high-field electrode generates hyperbaric environment, avoids waste of energy.
In the embodiment of the present invention, it is provided with rubber washer between spring lower part and high-field electrode top, is insulated for preventing
Layer abrasion causes safety accident.
Multiple high voltage negatives are evenly arranged into multiple rows of on sieve in the embodiment of the present invention, and two neighboring high pressure is negative in every row
For interpolar away from equal, the high voltage negative spacing of adjacent two rows is equal, and each high voltage negative staggered row in adjacent two rows of high voltage negatives
Column；Quantity at least ten of every row's high voltage negative, in total at least 10 rows.
Quantity at least five of mesohigh electrode of the embodiment of the present invention, is uniformly distributed on the cover board, and each high-field electrode is in a row
Or multiple rows of distribution, or be distributed in one or how each annulus.
Sink memory water storage in the embodiment of the present invention, the water outlet of sink are connected to the water inlet of water pump, the water inlet of sink
Mouth is connected to the water outlet of product collector.
50~800kV of pulse strength, 15~50Hz of pulse frequency when exporting high electric field pulse in the embodiment of the present invention.
The material of pulse insulating cylinder body is PVC in the embodiment of the present invention, and the material of support frame and cover board is stainless steel.
The material of sieve is stainless steel in the embodiment of the present invention, and the aperture of sieve is 2~10mm.
The material of mesohigh of embodiment of the present invention electrode and high voltage negative is stainless steel；High-field electrode is inverted circular cone
Shape, high voltage negative are cone.
It is insulated between lower fixed block and cover board by insulating washer in the embodiment of the present invention.
To being connected to below the discharge port of ore storage bin and cover board in the embodiment of the present invention, valve is equipped with to the feed inlet of ore storage bin.
Inclination sieve is equipped in the embodiment of the present invention in product collector, tilt 20 ° of the angle of sieve and horizontal plane~
40 °, inclination sieve is located above water outlet, and the aperture for tilting sieve is 2~10mm.
The wall thickness that film is agitated in the embodiment of the present invention is 15~20mm.
Discharge cycle changes with level-one input voltage and ball gap spacing in the embodiment of the present invention, and wherein level-one input voltage exists
45~90V, ball 15~30mm of gap spacing, pulse number per minute is at 5~45 times, then discharge cycle is 1/5~1/45min；Such as
Shown in Fig. 7.
Mesohigh electrical pulse device structure of the embodiment of the present invention as shown in Figure 1, include to ore storage bin 1, pulse insulating cylinder body 2,
Support frame 3, palsating equipment, product collector and power supply 9；Pulse insulating cylinder body top is cylindrical shape, and lower part is inverted rotary table
Shape, top are equipped with cover board 12, and cover board 12 is equipped with channel and is connected to ore storage bin 1；The side wall of insulating cylinder body 2 is cased with support frame 3, bottom
Portion is assembled together with palsating equipment；
Palsating equipment structure is as shown in figure 3, by pulsation insulating cylinder body 23, agitate diaphragm 25, gape 26, pulsation bullet
29, connecting rod 28 and eccentric wheel 27 form, and the side wall of pulsation insulating cylinder body 23 is equipped with water inlet 24 and 7 outlet of water pump, arteries and veins
The bottom of dynamic insulating cylinder body 23 is connect with the top of diaphragm 25 is agitated, and the bottom of diaphragm 25 is agitated to connect with gape 26, is pulsed
Bullet 29 be arranged in gape 26, pulsation 29 bottom of bullet and one end of connecting rod 28 it is hinged, the other end of connecting rod 28 and
Eccentric wheel 27 is hinged, and eccentric wheel 27 passes through motor driven；
25 material of diaphragm of agitating is rubber；
Gape 26 is connected to the feed inlet of product collector, and the structure of product collector is as shown in figure 4, side wall is equipped with
Water outlet 31；
Cover board 12 be equipped with multiple telescopic devices, telescopic device structure as shown in Fig. 2, by copper rod 14, high-field electrode 16,
Upper fixed block 22, lower fixed block 21 and spring 15 form, and upper fixed block 22 is fixedly connected on 14 top of copper rod, and lower fixed block 21 is solid
It is scheduled on cover board 12, copper rod 14 passes through lower fixed block 21 and is slidably and sealingly connected with lower fixed block 21, high-field electrode 16 and copper rod
14 bottoms are fixedly connected, and 15 top of spring is fixedly connected with lower fixed block 21, and 15 bottom end of spring is fixedly connected with high-field electrode 16,
And spring 15 is looped around outside copper rod 14；
The copper rod 14 of multiple telescopic devices is connected in parallel on two groups of high voltage ceramic capacitors 11 by high-voltage conducting wires 13, high pressure pottery
Porcelain condenser 11 assembles 10 together with ignition transformer is exchanged, and exchange ignition transformer 10 passes through one-way pressure-regulating device 19 and power supply
9 are assembled together；
Wherein high voltage ceramic capacitor and the circuit for exchanging ignition transformer part are as shown in Figure 6；Two groups of higfh-tension ceramics electricity
Every group of four higfh-tension ceramics capacitors in container；Power supply is through single-phase voltage regulator transformation, the boosting of exchange ignition transformer and six times of repoussages
High voltage direct current is exported after current circuit rectifier boost, is charged to high voltage ceramic capacitor, the rise time of charging voltage is microsecond
Magnitude；The voltage of each capacitor reach make gas switch be connected after, output the rise time nanosecond order high electric field pulse, through height
Pressure conducting wire is loaded on load electrode；
The bottom end of pulse insulating cylinder body 2 is fixedly connected with grounding electrode 4, and grounding electrode 4 is grounded across support frame 3；
The bottom end of the cylindrical portion of pulse insulating cylinder body 2 is fixedly installed with sieve 18, is equipped on sieve 18 multiple high
Cathode 17 is pressed, structure is as shown in Figure 5；
The axis of eccentric wheel 27 is assembled together with motor, and connecting rod 28 and the hinged position of eccentric wheel 27 are located at other than axis
Part；
The water inlet of water pump 7 is connected to the water outlet of sink, the water inlet of sink and the water outlet on product collector side wall
Mouth 31 is connected to；Filled with water as dielectric 8 in sink.
Mesohigh cathode of the embodiment of the present invention is evenly distributed on sieve, for improving electric crushing efficiency, strengthens broken effect
Fruit.
Embodiment 1
The scheelite sample ore used selects factory's raw ore for the low-grade no tin ore of south jiangxi, and main chemical compositions are by mass percentage
As shown in table 1；
Table 1
| Element | WO3 | Sn | Zn | Cu | Pb | Bi | Mo |
| Content | 0.185 | 0.13 | 0.145 | 0.027 | 0.033 | 0.016 | 0.017 |
| Element | Fe | SiO2 | Al2O3 | CaO | MgO | Li2O | Rb2O |
| Content | 1.61 | 72.86 | 12.04 | 0.92 | 0.145 | 0.130 | 0.126 |
| Element | Cs2O | Be2O3 | MnO | K2O | P | As | S |
| Content | 0.0073 | 0.00 | 0.57 | 2.67 | 0.008 | 0.003 | 0.15 |
By table as it can be seen that the element recycled in ore for ore dressing is mainly tungsten, harmful element arsenic content is lower.To raw ore into
X-ray diffraction analysis is gone, to find out that the essential mineral of sample ore forms.In raw ore essential mineral have wolframite, cassiterite, quartz,
Albite, mica, content are about 0.32%, 0.17%, 39.82%, 23.54%, 24.31%.
Method are as follows:
Start water pump, continuously enter water in the pulsation insulating cylinder body of palsating equipment, and from the water outlet of product collector
Continuous discharge；Water is full of inside pulsation insulating cylinder body and product collector as dielectric, and liquid level is higher than the bottom of high-field electrode
End；
Scheelite ore is placed in in ore storage bin, and by being transmitted in pulse insulating cylinder body to ore storage bin；Scheelite ore
It is deposited on sieve, and the scheelite ore at top is contacted with high-field electrode；
Power supply is opened, electric current exchanges ignition transformer boosting and the rectification of six voltage doubling rectifing circuits through single-phase voltage regulator transformation
High voltage direct current is exported after boosting, is charged to high voltage ceramic capacitor, when super-pressure ceramic capacitor voltage reaches breakdown voltage
After value, the gas switch conducting being attached thereto exports high electric field pulse, is loaded into copper rod through high-voltage conducting wires and is transmitted to high-voltage electricity
Instantaneous high pressure electric field is formd on extremely, between high-field electrode and high voltage negative；When the voltage on high-field electrode reaches breakdown voltage
It when value, discharges between high-field electrode and high voltage negative, makes scheelite ore reduction；When the voltage on high-field electrode reaches again
When to breakdown voltage value, formation is discharged next time；When broken scheelite ore particles be less than mesh size when, through sieve into
Enter palsating equipment；
It is rotated by motor driven eccentric wheel, makes bullet periodically up and down motion of pulsing；When pulsation bullet is transported upwards
When dynamic, ascending current is formed in palsating equipment, and when bullet of pulsing moves downward, descending water is formed in palsating equipment
Stream；The ore on sieve is acted on by the lifting of water flow, makes the part of scheelite ore small particles on sieve gradually downward
It is mobile；
Broken scheelite ore enters in product collector by palsating equipment；
Supply voltage 220V, frequency 50Hz；
Single-phase voltage regulator, exchange ignition transformer and high voltage ceramic capacitor form the pulse power, are used for output electric pulse,
Electric pulse rising time is 50ns~500ns；The rising time is the time of pulse shaping waveform；
Breakdown voltage value is 20kV；
The pulse strength 80kV of high electric field pulse, pulse frequency 25Hz；
High electric field pulse handles the time as 5min, then takes out ore after pretreatment, pre-processes sample ore grinder
2mm is crushed to hereinafter, carrying out ore grinding with cartridge type rod mill, adjusts ore pulp mass concentration 60% in ore grinding, ore grinding time 2min,
Pretreatment sample is made；
Using identical ore without Electric Pulse Treatment ore grinding in the same manner, obtain standard sample；
Size exclusion test and the measurement of liberation degree of minerals are carried out to two kinds of ore grinding products, as a result by mass percentage such as table
Shown in 2；
Table 2
Pretreated little particle ore is after broken-ore grinding ,+0.074mm, -0.074+ in ore milling product
The content of four grades of 0.043mm, -0.043+0.038mm, -0.038mm reduces by 20.76 hundred compared with standard ore milling product respectively
Branch increases 0.58 percentage point, increases 11.22 percentage points, increases 8.96 percentage points；Raw ore is pre- by high electric field pulse
After processing, ore milling product valuable mineral liberation degree of minerals is total to improve 23.83 percentage points；As it can be seen that high electric field pulse is located in advance
Reason technology is applied to the operation of scheelite comminution, improves liberation degree of minerals, improves grinding efficiency.
Embodiment 2
For the scheelite sample ore used for Jiangxi tungsten mines raw ore, main chemical compositions are as shown in table 3 by mass percentage；
Table 3
| Element | WO3 | Cu | Sn | Mo | Pb | Zn | S |
| Content | 0.27 | 0.09 | 0.03 | 0.003 | 0.017 | 0.016 | 0.17 |
| Element | P | SiO2 | Al2O3 | CaO | MgO | TiO2 | Fe |
| Content | 0.07 | 69.86 | 13.85 | 2.41 | 2.08 | 0.69 | 3.02 |
| Element | K2O | Na2O | MnO | As | S | ||
| Content | 3.73 | 1.19 | 0.57 | 0.004 | 0.16 |
By table as it can be seen that useful element is mainly tungsten, copper, molybdenum, essential element is silicon, magnesium, aluminium in gangue mineral；Tungsten object phase point
Analysis shows mainly to be recovered as scheelite 79.52% in mineral, and wolframite 18.59% is few containing wolfram ocher, and occupation rate is
1.89%；
Method is the same as embodiment 1；
Using identical ore without Electric Pulse Treatment ore grinding in the same manner, obtain standard sample；
Size exclusion test and the measurement of liberation degree of minerals are carried out to two kinds of ore grinding products, as a result by mass percentage such as table
Shown in 4；
Table 4
Pretreated little particle ore is after broken-ore grinding ,+0.074mm, -0.074+ in ore milling product
The content of four grades of 0.043mm, -0.043+0.038mm, -0.038mm reduces by 11.01 hundred compared with standard ore milling product respectively
Branch increases 1.02 percentage points, increases 21.24 percentage points, 11.25 percentage points of decline；Raw ore passes through high electric field pulse
After pretreatment, ore milling product valuable mineral liberation degree of minerals is total to improve 28.46 percentage points；As it can be seen that improving monomer solution
Under the premise of from degree, fine-graded yield is also effectively reduced, facilitates the recovery processing of subsequent flotation.High electric field pulse pretreatment
Technology is applied to the operation of scheelite comminution, improves liberation degree of minerals, improves grinding efficiency.
Claims (10)
1. a kind of strengthen the high electric field pulse preprocess method that scheelite is broken and sorts, it is characterised in that use high electric field pulse
Device, the device include to ore storage bin, pulse insulating cylinder body, support frame, palsating equipment, product collector and power supply；Pulse insulation
Cylinder top be cylindrical shape, lower part be it is inverted round table-like, top be equipped with cover board, cover board be equipped with channel be connected to ore storage bin；
The side wall of insulating cylinder body is cased with support frame, and bottom is assembled together with palsating equipment；Palsating equipment by pulsation insulating cylinder body, agitate
Diaphragm, gape, pulsation bullet, connecting rod and eccentric group are at the side wall for insulating cylinder body of pulsing is equipped with water inlet and water pump
Connection, the bottom for insulating cylinder body of pulsing are connect with the top of diaphragm is agitated, and the bottom of diaphragm is agitated to connect with gape, pulsation cone
Body is arranged in gape, and one end of pulsation bullet bottom and connecting rod is hinged, and the other end and eccentric wheel of connecting rod are hinged, partially
Heart wheel passes through motor driven；The diaphragm material of agitating is rubber；Gape is connected to the feed inlet of product collector, product
The side wall of collector is equipped with water outlet；The cover board is equipped with multiple telescopic devices, and telescopic device is by copper rod, high-voltage electricity
Pole, upper fixed block, lower fixed block and spring composition, upper fixed block are fixedly connected on copper rod top, and lower fixed block is fixed on cover board
On, copper rod passes through lower fixed block and is slidably and sealingly connected with lower fixed block, and high-field electrode is fixedly connected with copper rod bottom, spring top
End is fixedly connected with lower fixed block, and spring bottom end is fixedly connected with high-field electrode, and spring is looped around outside copper rod；It is each flexible
The copper rod of device is connected in parallel on two groups of high voltage ceramic capacitors by high-voltage conducting wires, high voltage ceramic capacitor with exchange igniting transformation
Device is assembled together, and exchange ignition transformer is assembled together by one-way pressure-regulating device with power supply；The bottom end of pulse insulating cylinder body
It is fixedly connected with grounding electrode, grounding electrode is grounded across support frame；The bottom end of the cylindrical portion of pulse insulating cylinder body is fixed
Sieve is installed, multiple high voltage negatives are installed on sieve；
Method sequentially includes the following steps:
(1) start water pump, continuously enter water in the pulsation insulating cylinder body of palsating equipment, and connect from the water outlet of product collector
Continuous discharge；Water is full of inside pulsation insulating cylinder body and product collector as dielectric, and liquid level is higher than the bottom end of high-field electrode；
(2) scheelite ore is placed in in ore storage bin, and by being transmitted in pulse insulating cylinder body to ore storage bin；Scheelite ore storage
Product is on sieve, and the scheelite ore at top is contacted with high-field electrode；
(3) power supply is opened, electric current exchanges ignition transformer boosting and the rectification of six voltage doubling rectifing circuits rises through single-phase voltage regulator transformation
High voltage direct current is exported after pressure, is charged to high voltage ceramic capacitor, when super-pressure ceramic capacitor voltage reaches breakdown voltage value
Afterwards, the gas switch conducting being attached thereto, exports high electric field pulse, is loaded into copper rod through high-voltage conducting wires and is transmitted to high-field electrode
On, instantaneous high pressure electric field is formd between high-field electrode and high voltage negative；When the voltage on high-field electrode reaches breakdown voltage value
When, it discharges between high-field electrode and high voltage negative, makes scheelite ore reduction；When the voltage on high-field electrode reaches again
When breakdown voltage value, formation is discharged next time；When broken scheelite ore particles are less than mesh size, enter through sieve
Palsating equipment；
(4) it is rotated by motor driven eccentric wheel, makes bullet periodically up and down motion of pulsing；When pulsation bullet moves upwards
When, ascending current is formed in palsating equipment, and when bullet of pulsing moves downward, descent waterflow is formed in palsating equipment；
The ore on sieve is acted on by the lifting of water flow, moves the part of scheelite ore small particles on sieve gradually downward
It is dynamic；
(5) broken scheelite ore enters in product collector by palsating equipment.
2. a kind of high electric field pulse preprocess method for strengthening scheelite and being crushed and sorting according to claim 1, special
Sign is in the high electric field pulse device that axis and the motor of eccentric wheel are assembled together, and connecting rod and eccentric wheel are hingedly
Position is located at the part other than axis.
3. a kind of high electric field pulse preprocess method for strengthening scheelite and being crushed and sorting according to claim 1, special
Sign is in the high electric field pulse device that the water inlet of water pump is connected to the water outlet of sink, the water inlet of sink and production
Water outlet connection on product collector side wall.
4. a kind of high electric field pulse preprocess method for strengthening scheelite and being crushed and sorting according to claim 1, special
Sign is in the high electric field pulse device that the material of sieve is stainless steel, and the aperture of sieve is 2~10mm.
5. a kind of high electric field pulse preprocess method for strengthening scheelite and being crushed and sorting according to claim 1, special
Sign is in the high electric field pulse device that the material of high-field electrode and high voltage negative is stainless steel；High-field electrode is to be inverted
Cone, high voltage negative be cone.
6. a kind of high electric field pulse preprocess method for strengthening scheelite and being crushed and sorting according to claim 1, special
Sign is in the high electric field pulse device, and inclination sieve is equipped in product collector, tilts the angle of sieve and horizontal plane
20 °~40 °, inclination sieve is located above water outlet, and the aperture for tilting sieve is 2~10mm.
7. a kind of high electric field pulse preprocess method for strengthening scheelite and being crushed and sorting according to claim 1, special
Sign is in the high electric field pulse device that spring is compressed spring, and the length of the nature of spring is greater than high-field electrode
The distance between lower fixed block.
8. a kind of high electric field pulse preprocess method for strengthening scheelite and being crushed and sorting according to claim 1, special
Sign is in step (3) that with being discharged after scheelite ore reduction from sieve, the scheelite ore on sieve is gradually decreased；It is high
Piezoelectricity pole is gradually reduced under the elastic force effect of spring, until contacted with lower fixed block when upper fixed block, at this time high-field electrode with
There is gap between high voltage negative, prevents short circuit.
9. a kind of high electric field pulse preprocess method for strengthening scheelite and being crushed and sorting according to claim 1, special
Sign is in step (3) that the adjacent time interval discharged twice is discharge cycle, and pulsation bullet moves up and down once as pulsation
Period；It is equal to the positive integer times of discharge cycle by adjusting the motor speed control pulsation period；The discharge cycle is with level-one
Input voltage and the variation of ball gap spacing, wherein level-one input voltage is in 45~90V, ball 15~30mm of gap spacing, pulse per minute
Number is at 5~45 times, then discharge cycle is 1/5~1/45min.
10. a kind of high electric field pulse preprocess method for strengthening scheelite and being crushed and sorting according to claim 1, special
Sign is the supply voltage 220V, frequency 50Hz.
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| WO2021004189A1 (en) * | 2019-07-05 | 2021-01-14 | 东北大学 | High-voltage electrical pulse pretreatment method for reinforcing galena crushing and sorting |
| CN115515718A (en) * | 2020-02-27 | 2022-12-23 | 德尔塔鲁特有限责任公司 | Method and apparatus for electric pulse disruption and separation |
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