CN106944225B - A kind of high electric field pulse preprocess method that strong permanent magnet mine is crushed and sorts - Google Patents
A kind of high electric field pulse preprocess method that strong permanent magnet mine is crushed and sorts Download PDFInfo
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- CN106944225B CN106944225B CN201710206911.3A CN201710206911A CN106944225B CN 106944225 B CN106944225 B CN 106944225B CN 201710206911 A CN201710206911 A CN 201710206911A CN 106944225 B CN106944225 B CN 106944225B
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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
-
- 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
-
- 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
-
- 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
The invention discloses the high electric field pulse preprocess methods that a kind of strong permanent magnet mine is broken and sorts, and belong to technical field of mineral processing.This kind of method makes target minreal crystal will be completely dissociated by selective crushing, i.e. mineral generate more mono mineral particles by die break, ensure that the quantity of monomer dissociation iron mineral in milling product can meet the requirement of follow-up separation technique, reduces subsequent processing process energy consumption.High electric field pulse energy storage, and it is released energy to load with high power density in very short time, complete high electric field pulse output, magnetic iron ore is discharged by high-pressure work electrode, make magnetic iron ore along magnet mineral and gangue mineral granule boundary, inclusion enclave, do not crack between jljl phase and come, and keeps complete crystalline form.
Description
Technical field
The invention belongs to technical field of mineral processing, and in particular to a kind of high-voltage electricity arteries and veins that strong permanent magnet mine is crushed and sorts
Preprocess method is rushed, to meet the needs of broken product and subsequent technique.
Background technology
China's steel and iron industry flourishes in recent years, and iron and steel output hits new peak continuously, and greatly have stimulated the demand of iron ore, iron
Ore price also hits new peak continuously.And currently, global iron ore supply-demand relationship changes, iron ore price plummets, and causes the country
The intimate whole industry loss in iron ore mine.At the same time, China's iron ore deposit is in the majority with lean ore, and mineral deposit symbiosis, Associated Constituents are more, iron ore
Stone forms that complex and disseminated grain size is thin, and therefore, it is low and of high cost that the ore dressing of China's iron ore work faces difficulty bigger, efficiency
Etc. problems.Wherein iron ore is crushed field sixty-four dollar question and has：The investment of broken and grinding attachment and maintenance cost it is very high,
Energy consumption is big, generate the excessive fine fraction that cannot be handled and dissociates insufficient coarse fraction, increases the difficulty of follow-up sorting operation.
Breaking method is mainly mechanical crushing used by industrial at present.Mechanical crushing is the granularity by reducing ore
Make mineral disaggregation, in the process, acts on the power that mineral grains borderline power is compared to be used in mineral grain and want weak, meeting
Cause coarse grain mineral in ore occasionally can be broken along crystal grain face, it is broken a degree of transcrystalline occur.With ore machinery comminution
The target minreal amount of the reduction of granularity, monomer dissociation is more and more, but method for separating to the recycling ability of target minreal with
It dissociates the reduction of granularity and declines.
In the depression period of the current domestic intimate whole industry loss in iron ore mine, the innovation and optimization of technique of preparing seem particularly
Urgently, the research of high electric field pulse selective crushing magnet ore preprocess method is come into being, and has important strategic importance.
On the basis of ensureing valuable mineral quality, operation cost of enterprises is saved, the waste of resource is reduced, is the sustainable development of enterprise
Most solid foundation guarantee is provided with strong competition, one seat can be accounted in fierce industry competition.
Invention content
For existing machinery crushing technology above shortcomings, a kind of strong permanent magnet mine of present invention offer is broken and sorts
High electric field pulse preprocess method.This kind of method makes target minreal crystal will be completely dissociated by selective crushing, i.e., mineral are pressed
Die break generates more mono mineral particles, it is ensured that the quantity of monomer dissociation iron mineral can meet follow-up point in milling product
The requirement of technique is selected, subsequent processing process energy consumption is reduced.
High electric field pulse technology be it is a kind of carrying out temporal compression by storing energy, then in the extremely short time
The interior technology for carrying out High voltage output.It is stored up by the way that the energy of smaller power to be slowly input to the long period in intermediate energy storage device
Store away, then energy compressed and converted, by pulse shaping system, the extremely short time (most short is nanosecond) with
High power density releases energy to load, completes high electric field pulse output, metallic ore is discharged by high-pressure work electrode
Stone makes metallic ore along granule boundary, inclusion enclave, does not crack between jljl phase and come, the various mineral meetings wherein in ore
It is fully exfoliated, and keeps complete crystalline form.
The present invention method realized firstly the need of following high electric field pulse ore crushing apparatus is used, this high-voltage electricity
Pulse ore crushing apparatus is as shown in Fig. 1, mainly by power supply (1), single-phase voltage regulator (2), exchange ignition transformer (3), six multiplication of voltages
Rectification circuit (4), super-pressure ceramic capacitor (5), copper rod (6), high-field electrode (7), conductive cylinder (8), electric discharge muck bucket
(9), vibration screen (10), dielectric (11), to ore storage bin (12), dielectric storehouse (13), earth lead (14), solid-liquid separator
(15), product collector (16), gas switch (17), high-voltage conducting wires (18), insulation bung (19), dielectric circulating line
(20), vibrating device (21), insulation vibrating arm (24) form, and wherein power supply (1) belongs to daily power supply unit, power supply (1) and list
Phase voltage regulator (2) is connected, single-phase voltage regulator (2) again with exchange ignition transformer (3) and be connected, exchange ignition transformer (3)
Output six voltage doubling rectifing circuits of termination (4), the input of six voltage doubling rectifing circuits (4) output end and super-pressure ceramic capacitor (5)
End is connected, and the both ends and the both ends of gas switch (17) of super-pressure ceramic capacitor (5) are in parallel, and being constituted with this can be defeated
Go out the high-voltage rectifying oscillating circuit of high electric field pulse, the output end of high-voltage rectifying oscillating circuit is the super-pressure ceramic electrical after parallel connection
Container (5) output end is connected with high-voltage conducting wires (18), and one end of multiple copper rods (6) is connected in parallel on high-voltage conducting wires (18), copper rod
(6) the other end is equipped with high-field electrode (7), and copper rod (6) is insulated the insulation being fixed at the top of electric discharge muck bucket (9)
On bung (19), and the one end for being equipped with high-field electrode (7) is deep into electric discharge muck bucket (9)；Discharge muck bucket (9)
Outer layer is made of insulating materials, and the liner of electric discharge muck bucket (9) is inlaid with conductive cylinder (8), and the top of electric discharge muck bucket (9) is
Tubular, bottom are back taper, and the excessive place of tubular and back taper is that tubular bottom is equipped with vibration screen (10), and electric discharge is broken
It is fixed with vibrating device (21) in the upper portion insulating partial sidewall of mine bucket (9), and passes through the vibrating arm that insulate with vibration screen (10)
(24) it connects；The back taper bottom of electric discharge muck bucket (9) is connected by discharge port and conveyance conduit with solid-liquid separator (15),
Solid-liquid separator (15) is followed by product collector (16) and dielectric circulating line (20), the upper portion side wall of electric discharge muck bucket (9)
On have dielectric entrance and ore inlet, wherein dielectric entrance is connected by pipeline with dielectric storehouse (13), mine
Stone entrance is connected by the way that chute or feeding belt are same to ore storage bin (12)；One end of earth lead (14) passes through electric discharge muck bucket
(9) outer layer is connected with its internal conductive cylinder (8), and the other end of earth lead (14), which is directly grounded, constitutes entire circuit
Circuit.
When work, startup power supply (1) power supply, through single-phase voltage regulator (2) transformation, exchange ignition transformer (3) boosts and six
High voltage direct current is exported after voltage doubling rectifing circuit (4) rectifier boost, is charged to super-pressure ceramic capacitor (5), charging voltage
Rise time is musec order, and after the voltage at super-pressure ceramic capacitor both ends reaches certain value, gas in parallel is opened therewith
(17) breakdown conducting is closed, the output rise time, in the high electric field pulse of nanosecond order, copper rod was loaded into through high-voltage conducting wires (18)
(6) it and is transmitted on high-field electrode (7)；High-field electrode (7) and conductive cylinder (8) material use stainless steel, and the cylinder material that insulate is
Nylon, conductive cylinder (8) are grounding electrode, are connected with the earth by earth lead (14)；The tubular bottom of electric discharge muck bucket (9)
Vibration screen (10) is installed, vibration screen is by insulation vibrating arm (24) and is fixed on electric discharge muck bucket (9) upper portion insulating portion
The vibrating device (21) of point side wall is connected, and screen size can be according to requiring to be adjusted；High-field electrode (7) is high electric field pulse
Input terminal, the high electric field pulse that high electric field pulse electric discharge device is formed is output to by high-field electrode (7) is placed on conductive cylinder (8)
On interior bulky grain ore (22), and earth lead (14) forming circuit is connect with conductive cylinder (8).It high-field electrode (7) and leads
Torch body forms voltage difference between (8)；When the voltage on high-field electrode (7) reaches certain value, then in high-field electrode (7) and
Cylindrical drum is discharged between (8), and electric discharge is happened inside the ore being immersed in dielectric (11), due in nanosecond pulse
Under effect, it is more than ore by the dielectric strength of dielectric of water, so internal along valuable mineral and arteries and veins in bulky grain ore (22)
Be concatenated to form plasma channel between stone mineral interface, between high-field electrode and conductive cylinder after multiple discharge, then can
The bulky grain ore (22) that grain granularity is 10-100mm is crushed to the little particle ore (23) that grain graininess is 5-60mm, little particle
Ore (23) falls into electric discharge muck bucket (9) bottom centrum lower part absolutely after vibration screen (10) screening, after precipitation with a small amount of
Dielectric (11) discharge electric discharge muck bucket (9) is outside and interior into solid-liquid separator (15), is isolated by solid-liquid separator (15)
Little particle ore (23) enters product collector (16), in case being used continuously when follow-up broken, grinding operation.Final granular size
It, can be according to requiring to be adjusted slot size depending on the size of sieve pore.
The high electric field pulse ore crushing apparatus that this invention is completed should be used as follows.
Vibration on Start-up device (21), by insulating, vibrating arm (24) drives vibration screen (10) to vibrate；Its vibration frequency is
300~1200 times/min, the discharge port valve for being located at electric discharge muck bucket (9) bottom is closed, opens dielectric entrance and mine respectively
A certain number of dielectrics (11) and bulky grain ore (22) are imported into electric discharge muck bucket (9) by the valve of stone entrance, wherein
Dielectric (11) and the volume ratio of bulky grain ore (22) should be 1：2~5；When dielectric (11) and bulky grain ore (22) are filled
To electric discharge muck bucket (9) total measurement (volume) 2/3 to 3/4 when close above-mentioned two entrance valve；
Startup power supply (1) is powered, and through single-phase voltage regulator (2) transformation, exchange ignition transformer (3) boosts and six voltage multiplying rectifiers
Export high voltage direct current after circuit (4) rectifier boost, to super-pressure ceramic capacitor (5) charge, then pass through subsequent conditioning circuit to
High-field electrode (7) constantly conveys electric pulse, and sends bulky grain ore (22) to, so that it is shattered broken, the pulse of electric pulse is strong
Degree is 50~300kV, and pulse frequency is 10~20Hz；
The dielectric entrance of electric discharge muck bucket (9) is again turned on after 10~15min and ore enters after startup power supply (1) power supply
The valve of mouth, opens simultaneously its discharge port valve, and the flow of control dielectric (11) and bulky grain ore (22) ensures that electric discharge is broken
Dielectric (11) and the volume ratio of bulky grain ore (22) in mine bucket (9) remain 1：2~5, dielectric (11) and bulky grain
The loading of ore (22) is the 2/3~3/4 of electric discharge muck bucket (9) total measurement (volume)；
While opening the discharge port valve of electric discharge muck bucket (9), startup is attached thereto logical solid-liquid separator (15), Gu
The little particle ore (23) that liquid/gas separator (15) is isolated enters in product collector (16), in case follow-up use, isolates absolutely
Edge liquid (11) back among dielectric storehouse (13), is recycled through dielectric circulating line (20)；
Little particle ore (23) is milled to fineness control and accounts for 40%~80% in -0.044mm, in magnetic field intensity 60 by magnetic separation
Magnetic separation is carried out under the conditions of~100kA/m, obtains iron ore concentrate and tailing that TFe grades are more than 64%.
Compared with prior art, the features of the present invention and advantageous effect are：
Traditional sample broke method is compared, this highly selective breaking method has many good qualities：It is easy to clean, do not have
Cross contamination；Selective crushing does not destroy mineral crystal form etc..It is optimal along brilliant failure mode that electric pulse is broken, not only may be used
Keep magnetic iron ore broken, and generate running crack and crack on magnetic iron ore internal mineral interface, and then it is special to improve mineral cleavage
Property.After the broken pretreatment of high electric field pulse, one side magnetic iron ore intensity can substantially reduce magnetic iron ore, it is contemplated that reduce ore grinding energy consumption
30% or more；On the other hand it can make magnetic iron ore along the boundary breaking of different minerals, considerably increase the monomer solution of valuable mineral
From degree, magnetic iron ore separation index is helped to improve.
The present invention main innovation point be：
1, high electric field pulse preconditioning technique can realize that ore is dissociated along mineral grains interface, i.e. selective crushing,
Rather than crushed, in this way can keep component original form while by valuable mineral from the other components of surrounding
It separates.
2, high electric field pulse preconditioning technique may be implemented in not reduce in ore and be produced in the case of valuable mineral grain graininess
Raw more mono mineral particles, compare mechanical crushing, can improve the valuable mineral content of crushed product, improve crushed product
Liberation degree of minerals is conducive to the reduction of subsequent processing process energy consumption, saves entreprise cost.
3, high electric field pulse preconditioning technique can improve the Relative grindability of breakdown products, with single Mechanical Crushing phase
Than under the identical ore grinding time, high electric field pulse preconditioning technique can significantly improve fine fraction content.It is identical so as to shorten obtaining
The time of grain size content ore milling product saves energy consumption, increases enterprise profit.
4, high electric field pulse preconditioning technique can improve the separation index of magnetic iron ore, be provided for efficient utilize of magnetic iron ore
Technical strategies, the idea of development of response " innovation, green ", have been established in the widely applied good basis in ore dressing plant.
Description of the drawings
Fig. 1 is a kind of high electric field pulse ore crushing apparatus structural schematic diagram for magnetic iron ore comminution pretreatment, in figure：1
It is single-phase voltage regulator for power supply, 2,3 be exchange ignition transformer, and 4 be six voltage doubling rectifing circuits, and 5 be super-pressure ceramic capacitor,
6 be copper rod, and 7 be high-field electrode, and 8 be conductive cylinder, and 9 be electric discharge muck bucket, and 10 be vibration screen, and 11 be dielectric, 12 for
Ore storage bin, 13 be dielectric storehouse, and 14 be earth lead, and 15 be solid-liquid separator, and 16 be product collector, and 17 be gas switch, 18
It is insulation bung for high-voltage conducting wires, 19,20 be dielectric circulating line, and 21 be vibrating device, and 22 be bulky grain ore, and 23 be small
Granular ore, 24 be insulation vibrating arm.
Specific implementation mode
The present invention will be further described with reference to embodiments.
This invention is implemented fully according to method above-mentioned, that is, utilizes high electric field pulse ore crushing apparatus shown in FIG. 1,
Implemented according to each operating procedure listed by method, wherein Φ 50mm × 100mm tube ball mill ore grindings are used, using Φ
50mm magnetic separation tubes carry out magnetic separation and sort, the sorting index that then comparison Mechanical Crushing and high electric field pulse preconditioning technique obtain,
Illustrate the superiority of high electric field pulse preconditioning technique with this.
Embodiment 1
The sample ore that the present embodiment uses is The Great Hermit Hill magnetic iron ore, and main chemical compositions are as shown in table 1.It can be seen by table 1
Go out, valuable element is iron in raw ore, and TFe grades are that 32.61%, FeO contents are 17.49%；Major impurity is SiO2, is accounted for
45.77%；Objectionable impurities S, P content are relatively low.The chemical phase analysis of raw ore Fe elements is shown in Table 2, as shown in Table 2, iron in ore
Mainly exist in the form of magnetic iron ore, iron occupation rate is up to 79.70% in magnetic iron ore, secondly with siderite, red (brown) iron ore and silicon
The form of sour iron exists, and exists in the form of iron sulfide on a small quantity.
1 raw ore chemical composition analysis of table/%
Chemical phase analysis result/% of 2 iron in ore element of table
Among the magnetite ore of mentioned component is added to high electric field pulse ore crushing apparatus, carry out as the method previously described
Operation, the wherein frequency of vibration screen are 500 times/min, pulse strength 100kV, pulse frequency 10Hz；It is average persistently right
Ore electric discharge is crushed 10min, takes out pretreated little particle ore.And be finely ground to -0.074mm contents and account for 80%,
Magnetic field intensity carries out magnetic separation tube magnetic separation experiment under conditions of being 85kA/m.
The magnetic iron ore that raw ore TFe grades are 32.61%, by pre-processing ore and not pretreated ore using same
Ore grinding-magnetic separation process, analytical test is carried out to obtained product, separation results are as shown in table 3：
Screening test result % after table 3 pre-processes
By indicating that TFe grades can be improved 6.55%, return as it can be seen that being compared with untreated by pretreated ore
Yield improves 1.87%.
Embodiment 2
The sample ore that the present embodiment uses is derived from the mixing magnetic concentrate in thousand Mining Limited Company ore dressing plant of saddle, main
Chemical composition is as shown in table 4.As can be seen from Table 4, sample ore mineral composition is fairly simple, main iron-bearing mineral be magnetic iron ore and
Bloodstone, and gangue mineral is based on quartz, it is 33.012% that TFe grades, which are 47.70%, SiO2 contents, has industrial value
Other mineral contents it is very low, utility value is little.
4 raw ore chemical composition analysis of table/%
The magnetic iron ore that raw ore TFe grades are 47.70%, experiment production is carried out using 1 same technique of embodiment and parameter,
Analyze the production of unprocessed common mineral products and the little particle magnetic iron ore product by the processing of high electric field pulse ore crushing apparatus
Three rate, grade and the rate of recovery indexs, the results are shown in Table 5：
Screening test result % after table 5 pre-processes
By table 5 as it can be seen that the magnetic iron ore for being 47.70% for raw ore TFe grades, is handled by high electric field pulse ore crushing apparatus
Afterwards, TFe grades can be improved the 2.84%, rate of recovery and improve 0.9%.
Claims (1)
1. a kind of strong permanent magnet mine is crushed and the high electric field pulse preprocess method of sorting, it is characterised in that used by this method
High electric field pulse ore crushing apparatus is mainly by power supply (1), single-phase voltage regulator (2), exchange ignition transformer (3), six voltage multiplying rectifiers electricity
Road (4), super-pressure ceramic capacitor (5), copper rod (6), high-field electrode (7), conductive cylinder (8), electric discharge muck bucket (9), vibration
Sieve (10), gives ore storage bin (12), dielectric storehouse (13), earth lead (14), solid-liquid separator (15), product at dielectric (11)
Collector (16), gas switch (17), high-voltage conducting wires (18), insulation bung (19), dielectric circulating line (20), vibrating device
(21), insulation vibrating arm (24) forms, and wherein power supply (1) belongs to daily power supply unit, power supply (1) and single-phase voltage regulator (2) phase
Connection, single-phase voltage regulator (2) again with exchange ignition transformer (3) and is connected, exchange ignition transformer (3), which exports, terminates six multiplication of voltages
Rectification circuit (4), six voltage doubling rectifing circuits (4) output end and the input terminal of super-pressure ceramic capacitor (5) are connected, super-pressure
The both ends of ceramic capacitor (5) and the both ends of gas switch (17) are in parallel, and high electric field pulse can be exported by being constituted with this
High-voltage rectifying oscillating circuit, the output end of high-voltage rectifying oscillating circuit are super-pressure ceramic capacitor (5) output end after parallel connection
It is connected with high-voltage conducting wires (18), one end of multiple copper rods (6) is connected in parallel on high-voltage conducting wires (18), the other end peace of copper rod (6)
Equipped with high-field electrode (7), copper rod (6) is insulated on the insulation bung (19) being fixed at the top of electric discharge muck bucket (9), and
The one end for being equipped with high-field electrode (7) is deep into electric discharge muck bucket (9)；The outer layer of electric discharge muck bucket (9) is by insulation material
Material is made, and the liner of electric discharge muck bucket (9) is inlaid with conductive cylinder (8), and the top of electric discharge muck bucket (9) is tubular, and bottom is
The excessive place of back taper, tubular and back taper is that tubular bottom is equipped with vibration screen (10), the upper of muck bucket (9) of discharging
It is fixed with vibrating device (21) on portion's insulated part side wall, and is connect by the vibrating arm (24) that insulate with vibration screen (10)；It puts
The back taper bottom of electric muck bucket (9) is connected by discharge port and conveyance conduit with solid-liquid separator (15), solid-liquid separator
(15) it is followed by product collector (16) and dielectric circulating line (20), is had in the upper portion side wall of electric discharge muck bucket (9)
Dielectric entrance and ore inlet, wherein dielectric entrance are connected by pipeline with dielectric storehouse (13), and ore inlet passes through
Chute or feeding belt are connected to ore storage bin (12) together；One end of earth lead (14) pass through electric discharge muck bucket (9) outer layer with
Its internal conductive cylinder (8) is connected, and the other end of earth lead (14) is directly grounded the circuit for constituting entire circuit；It uses
High electric field pulse ore crushing apparatus, is operated in accordance with the following steps：
Vibration on Start-up device (21), by insulating, vibrating arm (24) drives vibration screen (10) to vibrate；Its vibration frequency be 300~
1200 times/min, the discharge port valve for being located at electric discharge muck bucket (9) bottom is closed, opens dielectric entrance and ore inlet respectively
Valve, a certain number of dielectrics (11) and bulky grain ore (22) are imported into electric discharge muck bucket (9), wherein dielectric
(11) it should be 1 with the volume ratio of bulky grain ore (22)：2~5；When dielectric (11) and bulky grain ore (22) are filled into electric discharge
Muck bucket (9) total measurement (volume) 2/3 to 3/4 when close above-mentioned two entrance valve；
Startup power supply (1) is powered, and through single-phase voltage regulator (2) transformation, exchange ignition transformer (3) boosts and six voltage doubling rectifing circuits
(4) high voltage direct current is exported after rectifier boost, charged to super-pressure ceramic capacitor (5), then pass through subsequent conditioning circuit to high pressure
Electrode (7) constantly conveys electric pulse, and sends bulky grain ore (22) to, so that it is shattered broken, and the pulse strength of electric pulse is
50~300kV, pulse frequency are 10~20Hz；
The dielectric entrance and ore inlet of electric discharge muck bucket (9) are again turned on after startup power supply (1) power supply after 10~15min
Valve, opens simultaneously its discharge port valve, and the flow of control dielectric (11) and bulky grain ore (22) ensures electric discharge muck bucket
(9) dielectric (11) and the volume ratio of bulky grain ore (22) in remain 1：2~5, dielectric (11) and bulky grain ore
(22) loading is the 2/3~3/4 of electric discharge muck bucket (9) total measurement (volume)；
While opening the discharge port valve of electric discharge muck bucket (9), startup is attached thereto logical solid-liquid separator (15), solid-liquid point
Enter in product collector (16) from the little particle ore (23) that device (15) is isolated, in case follow-up use, isolates dielectric
(11) it is recycled back among dielectric storehouse (13) through dielectric circulating line (20)；
Little particle ore (23) is milled to fineness control and in -0.044mm accounts for 40%~80% by magnetic separation, magnetic field intensity 60~
Magnetic separation is carried out under the conditions of 100kA/m, obtains iron ore concentrate and tailing that TFe grades are more than 64%.
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| CN111229423B (en) * | 2020-03-13 | 2021-07-06 | 中国矿业大学 | Continuous high-voltage electric pulse ore crushing device for multi-metal ore step-by-step enrichment |
| CN112916432B (en) * | 2021-03-24 | 2022-06-03 | 江西理工大学 | Intelligent magnetic ore sorting method and equipment |
| CN114733628B (en) * | 2022-03-16 | 2023-04-11 | 北京科技大学 | Composite ore dissociation and separation method based on high-pressure carbon dioxide |
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| JPH09192526A (en) * | 1996-01-12 | 1997-07-29 | Kobe Steel Ltd | Discharge crusher |
| DE10346650A1 (en) * | 2003-10-08 | 2005-05-19 | Forschungszentrum Karlsruhe Gmbh | Process reactor and operating method for electrodynamic fragmentation |
| RU2401701C1 (en) * | 2009-09-30 | 2010-10-20 | Государственное образовательное учреждение высшего профессионального образования Волгоградский государственный технический университет (ВолгГТУ) | Electrohydraulic crusher |
| CN104772209B (en) * | 2015-03-06 | 2017-03-08 | 中国科学院电工研究所 | A kind of light-operated pulse for polycrystalline silicon crushing device triggers system |
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