CN106944223B - A method of grinding efficiency is improved using electric pulse pretreatment ore - Google Patents
A method of grinding efficiency is improved using electric pulse pretreatment ore Download PDFInfo
- Publication number
- CN106944223B CN106944223B CN201710206437.4A CN201710206437A CN106944223B CN 106944223 B CN106944223 B CN 106944223B CN 201710206437 A CN201710206437 A CN 201710206437A CN 106944223 B CN106944223 B CN 106944223B
- Authority
- CN
- China
- Prior art keywords
- ore
- dielectric
- electric discharge
- muck bucket
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- 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
- B02C23/06—Selection or use of additives to aid 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
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a kind of methods for improving grinding efficiency using electric pulse pretreatment ore, belong to technical field of mineral processing.This method realizes the broken pretreatment of high electric field pulse using the dielectric property difference of different minerals in ore, high-voltage pulse exports the energy of high power density, it is discharged on ore by high-field electrode, valuable mineral and gangue mineral interface form many microfissures in ore, and then it reduces the intensity of ore and improves liberation characteristic, be conducive to improve grinding efficiency, reduce energy consumption, and separation index can be improved.
Description
Technical field
The invention belongs to technical field of mineral processing, and in particular to a kind of to improve ore grinding effect using electric pulse pretreatment ore
The method of rate, to reduce the energy consumption of subsequent grinding operation.
Background technique
China Metal mineral reserve reserves are more, but it is in the majority to be commonly low-grade difficult ore dressing, for example, iron ore, copper mine, Pb-Zn deposits and
Molybdenum ore etc. utilizes for Mining Development and brings bigger difficulty.And for metal mine production, the equipment of comminution operation is thrown
For money by the 65%~70% of Zhan Quan factory total amount, power consumption is about 50%~65%, steel consumption up to 50%, therefore, such as
What improves comminution operating equipment performance, the energy-efficient equipment of research and development, obtains more monomer particles, drop lower steel consumption, becomes each field
The target that worker pursues jointly.Technically, the quality height of ore milling product directly affects the height of mineral processing index, ore grinding
Production capacity directly decides the production capacity in dressing plant.
Current breaking method used by industrial is mainly mechanically pulverized.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.
Summary of the invention
For existing machinery crushing technology above shortcomings, the present invention provides a kind of high-voltage electricity for strengthening ore reduction
Pulse preprocess method, this kind of method are slowly to be inputted the electric flux of smaller power with the long period by specific device
It is stored into intermediate energy storage device, then energy is compressed and converted, by pulse shaping system, be most short
It is released energy with high power density to the load of ore class in the very short time of nanosecond, completes high electric field pulse output, lead to
It crosses high pressure working electrode and discharges into metallic ore, make metallic ore along granule boundary, inclusion enclave, do not crack between jljl phase and open
Come, wherein the various mineral in ore can be fully exfoliated, and keep complete crystalline form by die break, it is ensured that milling product
The quantity of middle monomer dissociation valuable mineral can sufficiently meet the requirement of follow-up separation technique, reduce subsequent processing process energy consumption.
Method needs provided by the invention are realized using specific high electric field pulse ore crushing apparatus, described here
High electric field 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, vibration device 21, insulation vibrating arm 24 form, wherein power supply 1
Belong to daily power supply unit or general power supply unit, power supply 1 is connected with single-phase voltage regulator 2, single-phase voltage regulator 2 again with exchange a little
Fiery transformer 3 is connected, exchange ignition transformer 3 output terminate six voltage doubling rectifing circuits 4, six voltage doubling rectifing circuits 4 it is defeated
Outlet is connected with the input terminal of super-pressure ceramic capacitor 5, the both ends of super-pressure ceramic capacitor 5 and the two of gas switch 17
End is in parallel, and constitutes the high-voltage rectifying oscillating circuit that can export high electric field pulse with this, high-voltage rectifying oscillating circuit it is defeated
Outlet is that the output end of the super-pressure ceramic capacitor 5 after parallel connection is connected with high-voltage conducting wires 18, and one end of multiple copper rods 6 is in parallel
On high-voltage conducting wires 18, the other end of copper rod 6 is equipped with high-field electrode 7, and the insulating mounting of copper rod 6, which is fixed on, is located at electric discharge muck bucket
On the insulation bung 19 at 9 tops, and the one end for being equipped with high-field electrode 7 is extend into electric discharge muck bucket 9；Discharge muck bucket
9 outer layer is made of insulating material, wherein being preferred with nylon material, the liner of electric discharge muck bucket 9 is inlaid with conductive cylinder 8, is put
The top of electric muck bucket 9 is tubular, and it is that tubular bottom is equipped with vibration in place of the transition of tubular and back taper that bottom, which is back taper,
Dynamic sieve 10, is fixed with vibration device 21 in the upper portion insulating partial sidewall for the muck bucket 9 that discharges, and by insulation vibrating arm 24 with
Vibration screen 10 connects；The conical lower portion 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, opens respectively in the upper portion side wall for the muck bucket 9 that discharges
There are dielectric entrance and ore inlet, wherein dielectric entrance is connected by pipeline with dielectric storehouse 13, and ore inlet passes through
Chute or feeding belt are connected with to ore storage bin 12；One end of earth lead 14 is inside the outer layer of electric discharge muck bucket 9 and its
Conductive cylinder 8 be connected, the other end of earth lead 14 is directly grounded the circuit for constituting entire circuit.
When work, startup power supply 1 is powered, and through 2 transformation of single-phase voltage regulator, exchanges the boosting of ignition transformer 3 and six times of repoussages
High voltage direct current is exported after 4 rectifier boost of current circuit, is charged to super-pressure ceramic capacitor 5, the rise time of charging voltage is
Musec order, after the voltage at 5 both ends of super-pressure ceramic capacitor reaches certain value, gas switch 17 in parallel is breakdown therewith
Conducting exports the rise time in the high electric field pulse of nanosecond order, is loaded into copper rod 6 through high-voltage conducting wires 18 and is transmitted to high-voltage electricity
On pole 7；The material of high-field electrode 7 and conductive cylinder 8 uses stainless steel, and insulation cylinder material is nylon.Conductive cylinder 8 is ground connection electricity
Pole is connected with the earth by earth lead 14；The tubular bottom of electric discharge muck bucket 9 is equipped with vibration screen 10, vibrating screen Netcom
It crosses insulation vibrating arm 24 and is connected with the vibration device 21 for being fixed on electric discharge 9 upper portion insulating partial sidewall of muck bucket, screen size
It can be according to requiring to be adjusted；High-field electrode 7 is high electric field pulse input terminal, the high-voltage electricity that high electric field pulse electric discharge device is formed
Pulse is output on the bulky grain ore 22 being placed in conductive cylinder 8 by high-field electrode 7, and connect ground connection with conductive cylinder 8
Conducting wire 14 is formed into a loop.Voltage difference is formd between high-field electrode 7 and conductive cylinder 8；When the voltage on high-field electrode 7 reaches one
When definite value, then discharge between high-field electrode 7 and conductive cylinder 8, electric discharge occurs in the ore being immersed in dielectric 11
Inside, due to being greater than ore by the dielectric strength of dielectric of water, so in bulky grain ore 22 in the case where nanosecond pulse acts on
Inside is concatenated to form plasma channel between valuable mineral and gangue mineral interface, more between high-field electrode 7 and conductive cylinder 8
After secondary electric discharge, then it is 5mm-60mm's that the bulky grain ore 22 that can be 10mm-100mm grain graininess, which is crushed to grain graininess,
Little particle ore 23, little particle ore 23 falls into electric discharge 9 bottom centrum lower part of muck bucket after the screening of vibration screen 10, through heavy
It is discharged outside electric discharge muck bucket 9 and enters in solid-liquid separator 15 with a small amount of dielectric 11 behind shallow lake, isolated by solid-liquid separator 15
Little particle ore 23 enter product collector 16, in case being used continuously when subsequent broken, grinding operation.Final granular size takes
It, can be according to requiring to be adjusted slot size certainly in the size of sieve pore.
The high electric field pulse ore crushing apparatus completed of the present invention should carry out as follows using.
I) start vibration device 21, drive vibration screen 10 to vibrate by insulation vibrating arm 24；Its vibration frequency be 300~
1200 times/min, the discharge port valve for being located at electric discharge 9 bottom of muck bucket is closed, opens dielectric entrance and ore inlet respectively
Valve, by a certain number of dielectrics 11 and bulky grain ore 22 imported into electric discharge muck bucket 9 in, wherein dielectric 11 with big
The volume ratio of grain ore 22 should be 1:2~5；When dielectric 11 and bulky grain ore 22 are filled into electric discharge 9 total measurement (volume) of muck bucket
The valve of above-mentioned two entrance is closed when 2/3 to 3/4；
II) startup power supply 1 is powered, and through 2 transformation of single-phase voltage regulator, exchanges the boosting of ignition transformer 3 and six voltage multiplying rectifiers electricity
High voltage direct current is exported after 4 rectifier boost of road, is charged to super-pressure ceramic capacitor 5, then passes through subsequent conditioning circuit to high-voltage electricity
The constantly conveying electric pulse of pole 7, and send bulky grain ore 22 to, so that it is shattered broken, pulse strength is 50~300kV, arteries and veins
Rushing frequency is 10~20Hz；
III the dielectric entrance and ore inlet of electric discharge muck bucket 9) are again turned on after 10~15min of the power supply of startup power supply 1
Valve, open simultaneously its discharge port valve, control the flow of dielectric 11 and bulky grain ore 22, guarantee electric discharge muck bucket 9
The volume ratio of interior dielectric 11 and bulky grain ore 22 remains 1:2~5, the loading of dielectric 11 and bulky grain ore 22
It is the 2/3~3/4 of electric discharge 9 total measurement (volume) of muck bucket；
IV the discharge port valve for) opening electric discharge muck bucket 9 simultaneously, starts and is attached thereto logical solid-liquid separator 15, solid-liquid
The little particle ore 23 that separator 15 is isolated enters in product collector 16, in case subsequent use, the dielectric 11 isolated
It returns among dielectric storehouse 13, is recycled through dielectric circulating line 20；
V) the ore grinding stage：The ores such as iron ore, copper mine, Pb-Zn deposits or molybdenum ore are distinguished after high electric field pulse pre-processes
Ore grinding is carried out according to different milling methods.
Compared with prior art, the features of the present invention and beneficial effect include：
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
Make ore reduction, and generate running crack and crack on ore internal mineral interface, and then improves mineral disaggregation characteristic.Mine
After high electric field pulse is broken, one side ore strength can substantially reduce stone, it is contemplated that reduce by 30% or more ore grinding energy consumption；Another party
Face can make ore considerably increase the liberation degree of minerals of valuable mineral along the boundary breaking of different minerals, help to improve mine
Stone separation index.
Main innovation point of the invention includes：
(1) the structure design of multi-pair electrodes realizes high efficiency and the company of high electric field pulse electric discharge ore crushing apparatus breaking ores
Continuous property；
(2) screen mesh size can be changed according to the requirement to breaking ores granular size, meets broken, grinding operation demand；
(3) the broken equipment of high electric field pulse electric discharge can dissociate ore 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；
(4) the broken equipment of high electric field pulse electric discharge can be produced in the case where not reducing valuable mineral grain graininess in ore
The valuable mineral content of crushed product can be improved compared to being mechanically pulverized in raw more mono mineral particles, improves crushed product
Liberation degree of minerals is conducive to the reduction of subsequent processing process energy consumption, saves entreprise cost.
Detailed description of the invention
Fig. 1 be it is a kind of crush pretreated high electric field pulse ore crushing apparatus structural schematic diagram for ore, in figure：1 is electricity
Source, 2 be single-phase voltage regulator, and 3 be exchange ignition transformer, and 4 be six voltage doubling rectifing circuits, and 5 be super-pressure ceramic capacitor, and 6 are
Copper rod, 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, and 12 is to mines
Storehouse, 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, and 18 are
High-voltage conducting wires, 19 be insulation bung, and 20 be dielectric circulating line, and 21 be vibration device, and 22 be bulky grain ore, and 23 be small
Grain ore, 24 be insulation vibrating arm.
Specific embodiment
The present invention will be further described with reference to embodiments.
All kinds of ores are carried out using high electric field pulse ore crushing apparatus above-mentioned and its application method in the embodiment of the present invention
Pretreatment, wherein the pulse strength selected is 100~300kV, pulse frequency is 10~15Hz；Using Φ 50mm × 100mm
Shape ball mill ore grinding.Specific embodiment and result are as follows：
Embodiment 1
The sample ore that the present embodiment uses is Liaoning iron ore factory raw ore, and main chemical compositions are as shown in table 1.It can by table 1
To find out, which has the common feature of the poor sinople rock of Anshan type sedimentary metamorphic, i.e. chemical component is simple, high
Silicon, poor iron, low calcium, magnesium, aluminium, for objectionable impurities sulphur phosphorus lower than the acid drift that industry allows, ore TFe grade is relatively low.Raw ore Fe
The chemical phase analysis of element is shown in Table 2, and as shown in Table 2, the content of magnetic iron ore accounts for the 77.94% of full iron in ore, ferrosilite
Content is higher, secondly exists in the form of red (brown) iron ore, ferric carbonate.
1 raw ore chemical composition analysis of table/%
Chemical phase analysis result/% of 2 iron in ore element of table
Using high electric field pulse ore crushing apparatus above-mentioned, the pulse strength selected is 120kV, pulse frequency 15Hz, height
Piezoelectric pulses equipment, which persistently discharges to ore, is crushed the time as 10min, ore after pretreatment is then taken out, using cartridge type rod mill
High electric field pulse pretreatment-ore grinding test is carried out, ore grinding index is shown in Table 3.
3 standard sample of table and pretreatment sample ore grinding comparison of test results %
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 21.12 hundred compared with standard ore milling product respectively
Branch increases 12.88 percentage points, increases 2.01 percentage points, increases 6.23 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 19.40 percentage points.As it can be seen that high electric field pulse is located in advance
Reason technology is applied to the operation of iron ore comminution, improves liberation degree of minerals, improves grinding efficiency.
Embodiment 2
The sample ore that the present embodiment uses is derived from Yunnan copper mine factory raw ore, and main chemical compositions are as shown in table 4, object phase point
Analysis as shown in table 5, the results are shown in Table 6 for the chemical phase analysis of copper in ore, as shown in Table 6, in ore copper mainly with
The form preservation of Independent Mineral accounts for about the 44.00% of total copper in the bornite, chalcopyrite, covellite of copper sulfide；Copper is with independent mine
Object preservation accounts for about the 41.82% of total copper in the cuprite, malachite of copper oxide.Separately there is the copper of part (to tie with isomorphism
Close copper oxide) form preservation in gangue mineral and chrysocolla, account for about the 14.18% of total copper.
4 raw ore chemical analysis results of table/%
5 raw ore copper material phase analysis result of table/%
Chemical phase analysis result/% of copper in 6 ore of table
Using high electric field pulse ore crushing apparatus above-mentioned, the pulse strength selected is 200kV, pulse frequency 12Hz, height
Piezoelectric pulses equipment, which persistently discharges to ore, is crushed the time as 15min, pretreated little particle ore is then taken out, using cylinder
Formula rod mill carries out high electric field pulse pretreatment-ore grinding test, and ore grinding index obtained is shown in Table 7.
7 standard sample of table and pretreatment sample ore grinding comparison of test results %
As shown in Table 7, pretreated little particle ore is after broken-ore grinding ,+0.074mm, -0.074 in product
The content of four grades of+0.043mm, -0.043+0.038mm, -0.038mm reduces by 17.52 hundred compared with standard ore milling product respectively
Branch increases 11.54 percentage points, increases 2.17 percentage points, increases 3.80 percentage points；Raw ore is pre- by high electric field pulse
After processing, ore milling product valuable mineral liberation degree of minerals improves 17.18 percentage points.As it can be seen that high electric field pulse pre-processes skill
Art is applied to the operation of copper mine comminution, improves liberation degree of minerals, improves grinding efficiency.
Embodiment 3
The sample ore that the present embodiment uses is derived from Yunnan lead-zinc dressing plant, and the metalliferous mineral in ore is with lead and zinc
Based on, raw ore chemistry multielement analysis is as shown in table 8, and raw ore lead material phase analysis is as shown in table 9, raw ore zinc material phase analysis such as table 10
Shown, raw ore chemistry multielement analysis and material phase analysis show that raw ore is lead-zinc, mainly have the element of recovery value to be
Lead and zinc, wherein Lead oxidation rate is 51.39%, zinc oxygenation efficiency is 39.45%.For current ore-dressing technique is horizontal, it can be recycled
Zinc oxide minerals be only zinc carbonate (i.e. smithsonite), raw ore zinc grade is lower and smithsonite distributive law is only 20.18%, for
Technique of preparing economic consideration, it is believed that the Zinc oxide minerals of the mine do not have synthetical recovery value.So the mesh of mine ore dressing recycling
Mineral be mainly vulcanized lead, zinc sulphide and lead oxide mineral.
8 raw ore chemistry multielement analysis result of table/%
9 raw ore lead material phase analysis result of table/%
10 raw ore zinc material phase analysis result of table/%
Using high electric field pulse ore crushing apparatus above-mentioned, the pulse strength selected is 100kV, pulse frequency 15Hz, height
Piezoelectric pulses equipment, which persistently discharges to ore, is crushed the time as 10min, pretreated little particle ore is then taken out, using cylinder
Formula rod mill carries out high electric field pulse pretreatment-ore grinding test, and ore grinding index obtained is shown in Table 11.
11 standard sample of table and pretreatment sample ore grinding comparison of test results %
Pretreated little particle ore after broken-ore grinding ,+0.074mm in product, -0.074+0.043mm, -
The content of four grades of 0.043+0.038mm, -0.038mm reduces by 16.41 percentage points compared with standard ore milling product respectively, increases
6.73 percentage points, 4.24 percentage points of raising, 5.43 percentage points of raising；Raw ore is after high electric field pulse pre-processes, mill
Mineral products valuable mineral liberation degree of minerals improves 18.22 percentage points.As it can be seen that high electric field pulse preconditioning technique is applied to lead
Zinc ore comminution operation, improves liberation degree of minerals, improves grinding efficiency.
Embodiment 4
More metal molybdenum ores that the molybdenum ore company of sample ore Shaanxi Province that the present embodiment uses provides, are crushed to test grain
After degree, mix well with being tested use.Chemical analysis and material phase analysis are carried out by standard samples.Analysis the results are shown in Table 12, table 13.
The chemical multielement analysis result/% of table 12
13 molybdenum material phase analysis result of table/%
X-ray diffraction analysis and rock-mineral determination analysis are carried out to ore, main ore mineral and its content are:Molybdenite
1.1%, magnetic iron ore 7.6%, galena 1.1%, pyrite 3.9%, chalcopyrite 0.20%, bloodstone 7.9% add up to
21.8%.There is gangue mineral and its content is：Plagioclase 29.4%, potassium feldspar 16.7%, quartz 10.6%, muscovite 5.5%,
Carbonate 14.2%, chlorite 1.5% add up to 78.2%.Wherein optional ore mineral is molybdenite, galena, magnetic iron ore, Huang
Iron ore.
Using high electric field pulse ore crushing apparatus above-mentioned, the pulse strength selected is 100kV, pulse frequency 15Hz, height
Piezoelectric pulses equipment, which persistently discharges to ore, is crushed the time as 10min, pretreated little particle ore is then taken out, using cylinder
Formula rod mill carries out high electric field pulse pretreatment-ore grinding test, and ore grinding index obtained is shown in Table 14.
14 standard sample of table and pretreatment sample ore grinding comparison of test results %
Pretreated little particle ore after broken-ore grinding ,+0.074mm in product, -0.074+0.043mm, -
The content of four grades of 0.043+0.038mm, -0.038mm reduces by 16.63 percentage points compared with standard ore milling product respectively, increases
9.69 percentage points, 4.44 percentage points of raising, 2.50 percentage points of raising；Raw ore is after high electric field pulse pre-processes, mill
Mineral products valuable mineral liberation degree of minerals improves 18.85 percentage points.As it can be seen that high electric field pulse preconditioning technique is applied to iron
Mine comminution operation, improves liberation degree of minerals, improves grinding efficiency.
Claims (3)
1. a kind of method for improving grinding efficiency using electric pulse pretreatment ore, which is characterized in that used by the 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), vibration device
(21), insulation vibrating arm (24) composition, wherein power supply (1) is general power supply unit, and power supply (1) is connected with single-phase voltage regulator (2)
Connect, single-phase voltage regulator (2) again with exchange ignition transformer (3) and be connected, the output of exchange ignition transformer (3) terminates six multiplication of voltages
The output end of rectification circuit (4), six voltage doubling rectifing circuits (4) is connected with the input terminal of super-pressure ceramic capacitor (5), superelevation
The both ends at the both ends and gas switch (17) of pressing ceramic capacitor (5) are in parallel to be configured to the high pressure of output high electric field pulse
The output end of rectification oscillating circuit, high-voltage rectifying oscillating circuit is connected with high-voltage conducting wires (18), and one end of multiple copper rods (6) is simultaneously
It is associated on high-voltage conducting wires (18), the other end of copper rod (6) is equipped with high-field electrode (7), and copper rod (6) insulating mounting, which is fixed on, to be located at
On insulation bung (19) at the top of electric discharge muck bucket (9), and one end for being equipped with high-field electrode (7) of copper rod (6) is placed in and puts
In electric muck bucket (9)；The outer layer of electric discharge muck bucket (9) is made of insulating material, and the liner of electric discharge muck bucket (9) is inlaid with conduction
Cylinder (8), the top of electric discharge muck bucket (9) are tubular, and bottom is back taper, are equipped with vibration in place of the transition of tubular and back taper
It moves sieve (10), is fixed with vibration device (21) in the upper portion insulating partial sidewall of electric discharge muck bucket (9), and vibration device
(21) it is connect by insulation vibrating arm (24) with vibration screen (10)；The back taper bottom of electric discharge muck bucket (9) passes through discharge port
It is connected with conveyance conduit with solid-liquid separator (15), solid-liquid separator (15) is followed by product collector (16) and dielectric circulation
Pipeline (20), discharge muck bucket (9) upper portion side wall on have dielectric entrance and ore inlet, wherein dielectric entrance
It is connected by pipeline with dielectric storehouse (13), ore inlet gives ore storage bin (12) to be connected by the way that chute or feeding belt are same；It connects
The outer layer that one end of ground wire (14) passes through electric discharge muck bucket (9) is connected with its internal conductive cylinder (8), earth lead
(14) the other end is directly grounded the circuit for constituting entire circuit, using the high electric field pulse ore crushing apparatus, according to following step
Suddenly it is operated：
I) start vibration device (21), by insulation vibrating arm (24) drive vibration screen (10) vibration, 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
It (11) is 1 with the volume ratio of bulky grain ore (22):2~5；When dielectric (11) and bulky grain ore (22) be filled into electric discharge it is broken
Mine bucket (9) total measurement (volume) 2/3 to 3/4 when close dielectric entrance and ore inlet valve；
II) startup power supply (1) is powered, through single-phase voltage regulator (2) transformation, exchange ignition transformer (3) boosting and six voltage multiplying rectifiers
High voltage direct current is exported after circuit (4) rectifier boost, to charge to super-pressure ceramic capacitor (5), then passes through subsequent conditioning circuit
Constantly convey electric pulse to high-field electrode (7), and send bulky grain ore (22) to so that its shatter it is broken, wherein pulse is strong
Degree is 50~300kV, and pulse frequency is 10~20Hz；
III the dielectric entrance and ore inlet of electric discharge muck bucket (9)) are again turned on after 10~15min of startup power supply (1) power supply
Valve, open electric discharge muck bucket (9) discharge port valve, control dielectric (11) and bulky grain ore (22) flow, guarantor
The volume ratio of dielectric (11) and bulky grain ore (22) in card electric discharge muck bucket (9) is 1:2~5, dielectric (11) and big
The loading of granular ore (22) is the 2/3~3/4 of electric discharge muck bucket (9) total measurement (volume)；
IV starting is attached thereto logical solid-liquid separator (15), solid-liquid while) opening the discharge port valve of electric discharge muck bucket (9)
The little particle ore (23) that separator (15) is isolated enters in product collector (16), in case subsequent use, that isolates is exhausted
Edge liquid (11) returns among dielectric storehouse (13) through dielectric circulating line (20) to be recycled；
V) the ore grinding stage：Bulky grain ore (22) is carrying out ore grinding after high electric field pulse pre-processes.
2. the method according to claim 1, wherein insulating materials includes nylon material.
3. the method according to claim 1, wherein bulky grain ore (22) include iron ore, copper mine, Pb-Zn deposits or
Molybdenum ore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710206437.4A CN106944223B (en) | 2017-03-31 | 2017-03-31 | A method of grinding efficiency is improved using electric pulse pretreatment ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710206437.4A CN106944223B (en) | 2017-03-31 | 2017-03-31 | A method of grinding efficiency is improved using electric pulse pretreatment ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106944223A CN106944223A (en) | 2017-07-14 |
| CN106944223B true CN106944223B (en) | 2018-11-27 |
Family
ID=59474491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710206437.4A Active CN106944223B (en) | 2017-03-31 | 2017-03-31 | A method of grinding efficiency is improved using electric pulse pretreatment ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106944223B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2017204211A1 (en) * | 2017-06-21 | 2019-01-17 | The University Of Queensland | An integrated separator system & process for preconcentration and pretreatment of a material |
| CN109569857A (en) * | 2018-11-23 | 2019-04-05 | 鞍钢集团矿业有限公司 | A kind of the magnetic field impulse pretreatment unit and method of continuous-stable |
| CN110075980A (en) * | 2019-06-03 | 2019-08-02 | 东北大学 | A kind of magnetic field impulse preprocess method for tourmaline grinding aid |
| CN110215985B (en) * | 2019-07-05 | 2021-06-01 | 东北大学 | High-voltage electric pulse device for ore crushing pretreatment |
| 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 |
| CN112007737A (en) * | 2020-08-18 | 2020-12-01 | 中国矿业大学(北京) | Crushing equipment |
| CN114433330B (en) * | 2022-02-08 | 2023-06-02 | 西安交通大学 | Device and method for crushing ores by controllable shock waves |
| FR3144767A1 (en) * | 2023-01-10 | 2024-07-12 | I-Rox | High Power Pulsed Electric Discharge Firing Tool |
| CN116371561B (en) * | 2023-02-21 | 2024-06-28 | 北京理工大学 | Method for reducing excessive crushing of tin polymetallic ore by cooperation of clustered bubbles and electric pulse explosion |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104984807B (en) * | 2015-07-08 | 2017-10-31 | 温州科技职业学院 | A kind of method of device and its breaking ores for continuous discharge breaking ores |
| CN205361598U (en) * | 2016-02-02 | 2016-07-06 | 苏州鸿博斯特超净科技股份有限公司 | Broken system of high -voltage pulse formula polycrystalline silicon silicon rod |
-
2017
- 2017-03-31 CN CN201710206437.4A patent/CN106944223B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106944223A (en) | 2017-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106944223B (en) | A method of grinding efficiency is improved using electric pulse pretreatment ore | |
| CN106944225B (en) | A kind of high electric field pulse preprocess method that strong permanent magnet mine is crushed and sorts | |
| CN106984412B (en) | A kind of lean hematite ore high electric field pulse selective molecular attraction Preconcentration | |
| WO2022032922A1 (en) | Series elutriation and deep beneficiation process for magnetite extremely difficult to be beneficiated | |
| CN106824455A (en) | A kind of high electric field pulse ore crushing apparatus and method for ore pretreatment | |
| CN206661389U (en) | A kind of high electric field pulse ore crushing apparatus for ore pretreatment | |
| CN108014913B (en) | Ultra-lean magnetite beneficiation method and system for associated phosphorus minerals | |
| CN106824454B (en) | A kind of high electric field pulse preprocess method strengthened refractory gold ore and leached | |
| CN104888947B (en) | The magnetic separation of fine grain teeth cloth magnetic-red composite ore-centrifuge sorting process | |
| CN109013037B (en) | Magnetite beneficiation process for improving coarse fraction tailing content and mill processing capacity | |
| CN108405173B (en) | Novel fine beneficiation process for magnetic hematite and siderite mixed iron ore | |
| CN101716553A (en) | Kiln slag processing technology of zinc volatilizing kiln | |
| CN105032582A (en) | Efficient mineral separation process using high-pressure roller mill and magnetic field screening machine | |
| CN106000639A (en) | High-grade matte-contained copper smelting converter slag treatment process | |
| CN112024120B (en) | Beneficiation method for micro-fine-particle-grade hematite and limonite | |
| CN111686926A (en) | Rough and fine separation-magnetism-weight-floatation combined process for treating magnetite | |
| CN112387413A (en) | Beneficiation method for fine flake graphite ore | |
| WO2024153015A1 (en) | Method and system for efficient ore crushing, grinding and sorting | |
| CN102230071B (en) | Novel technology of low-grade magnetite two-stage pre-selecting and crushing | |
| CN203990903U (en) | Flotation tailing reclaims iron device | |
| CN106944224B (en) | One kind being used for the pretreated high electric field pulse ore crushing apparatus of ore | |
| CN114100846B (en) | Mineral separation process for dry grinding and dry separation of magnetite with non-uniform embedded particle size | |
| CN115430517A (en) | Anshan type maghemite sectional grinding, heavy-magnetic process flow | |
| CN111229423B (en) | Continuous high-voltage electric pulse ore crushing device for multi-metal ore step-by-step enrichment | |
| CN108097448B (en) | Wet-type quality grading beneficiation process for shaft furnace roasting ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |