CN110215983B - Method for promoting tourmaline activation by using high-voltage electric pulse - Google Patents
Method for promoting tourmaline activation by using high-voltage electric pulse Download PDFInfo
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- CN110215983B CN110215983B CN201910603125.6A CN201910603125A CN110215983B CN 110215983 B CN110215983 B CN 110215983B CN 201910603125 A CN201910603125 A CN 201910603125A CN 110215983 B CN110215983 B CN 110215983B
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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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Abstract
A method for promoting tourmaline activation by using high-voltage electric pulse, which adopts a high-voltage electric pulse device and comprises the following steps: (1) starting a water pump to enable water to continuously enter the pulsating insulation cylinder and be discharged from the product collector; (2) conveying the tourmaline ore to a pulse insulation cylinder through an ore feeding bin, accumulating the tourmaline ore on a screen, and contacting the top of the pulse insulation cylinder with a high-voltage electrode; (3) turning on a power supply, discharging between the high-voltage electrode and the high-voltage cathode to break the tourmaline ore; (4) the eccentric wheel is driven to rotate by the motor, so that the pulse conical body periodically moves up and down; (5) the crushed tourmaline ore enters a product collector through a pulsation device. The method can obtain the calcium carbide ore powder with the activated water performance.
Description
Technical Field
The invention belongs to the technical field of material processing, and particularly relates to a method for promoting tourmaline activation by using high-voltage electric pulses.
Background
Tourmaline is a general name of minerals of tourmaline group, which is a silicate mineral with a ring structure characterized by containing boron and having very complex structure and chemical components; the tourmaline has the characteristics of permanent spontaneous polarization effect, piezoelectricity and pyroelectric property, can release negative ions, radiate far infrared rays, shield electromagnetism, adsorb ions and be recycled, is a green and environment-friendly functional mineral material, and has wide application prospect; the research of tourmaline as an industrial mineral in China is still in a primary stage, so that a large amount of non-precious stone level tourmaline resources in China cannot be fully developed and utilized; at present, the domestic tourmaline research mainly comprises the following aspects: purification processing of tourmaline, ultrafine grinding of tourmaline, surface modification of tourmaline, adsorption of tourmaline to heavy metal ions, application research of tourmaline, and activation of tourmaline to water.
The tourmaline has spontaneous polarization effect, can release negative ions and can radiate far infrared rays; far infrared rays radiated by the tourmaline can raise the water temperature, weaken the hydrogen bond action among water molecules, break the hydrogen bond, change large molecular group water into small molecular group water, and break the hydrogen bond in a water molecule cluster by an electric field generated spontaneously; the small molecular cluster water has strong osmotic energy, dissolving capacity and diffusing capacity, and can not only enhance the activity of enzyme in organism cells and improve the metabolism and autoimmunity of the organism, but also accelerate the running speed of the small molecular cluster water in the organism, thereby activating the cells, promoting the cells to absorb dissolved oxygen and nutrient substances and eliminating toxic and harmful metabolites.
In addition, the tourmaline can be repeatedly used, and secondary pollution to the environment can not be caused, so that the tourmaline is used for changing water molecule clusters, and the environment is protected and the energy is saved; therefore, the existing tourmaline needs to be acted on tourmaline powder by different pretreatment modes to improve the performances of releasing negative ions, radiating far infrared rays and activating water, so that the tourmaline can better exert value and is utilized by people.
Disclosure of Invention
The invention aims to provide a method for promoting tourmaline activation by using high-voltage electric pulses, aiming at the characteristics of tourmaline such as permanent spontaneous polarization effect, capability of releasing negative ions, far infrared ray radiation and the like, and improving the performances of tourmaline, far infrared ray radiation and activated water release through high-voltage electric pulse treatment.
The method for promoting the activation of the tourmaline by using the high-voltage electric pulse adopts a high-voltage electric pulse device, which comprises an ore feeding bin, a pulse insulation cylinder, a supporting frame, a pulsation device, a product collector and a power supply; the upper part of the pulse insulation cylinder is cylindrical, the lower part of the pulse insulation cylinder is in an inverted round table shape, the top of the pulse insulation cylinder is provided with a cover plate, and a channel is arranged on the cover plate and communicated with the ore feeding bin; the side wall of the insulating cylinder body is sleeved with a support frame, and the bottom of the insulating cylinder body is assembled with the pulsation device; the pulsation device consists of a pulsation insulating cylinder, a drumming diaphragm, an ore discharge port, a pulsation conical body, a connecting rod and an eccentric wheel, wherein a water inlet is formed in the side wall of the pulsation insulating cylinder and communicated with a water pump; the material of the drumming diaphragm is rubber; the ore discharge port is communicated with the feed inlet of the product collector, and the side wall of the product collector is provided with a water outlet; the cover plate is provided with a plurality of telescopic devices, each telescopic device consists of a copper rod, a high-voltage electrode, an upper fixed block, a lower fixed block and a spring, the upper fixed block is fixedly connected to the upper part of the copper rod, the lower fixed block is fixed on the cover plate, the copper rod penetrates through the lower fixed block and is in sliding sealing connection with the lower fixed block, the high-voltage electrode is fixedly connected with the bottom of the copper rod, the top end of the spring is fixedly connected with the lower fixed block, the bottom end of the spring is fixedly connected with the high-voltage electrode, and the spring is surrounded; the copper bars of the telescopic devices are connected in parallel on the two groups of high-voltage ceramic capacitors through high-voltage leads, the high-voltage ceramic capacitors are assembled with the alternating-current ignition transformer, and the alternating-current ignition transformer is assembled with the power supply through a one-way voltage regulator; the bottom end of the pulse insulation cylinder is fixedly connected with a grounding electrode, and the grounding electrode penetrates through the supporting frame to be grounded; the bottom end of the cylindrical part of the pulse insulation cylinder is fixedly provided with a screen, and a plurality of high-voltage cathodes are arranged on the screen;
the method comprises the following steps:
1. starting a water pump to enable water to continuously enter a pulsating insulation cylinder of the pulsating device and be continuously discharged from a water outlet of the product collector; water is used as insulating liquid to fill the interior of the pulsating insulating cylinder and the product collector, and the liquid level is higher than the bottom end of the high-voltage electrode;
2. the tourmaline ore is placed in an ore feeding bin and is conveyed into the pulse insulation cylinder body through the ore feeding bin; the tourmaline ore is stacked on the screen, and the tourmaline ore at the top is contacted with the high-voltage electrode;
3. the power supply is started, the current is transformed by the single-phase voltage regulator, the alternating current ignition transformer is boosted, and the six-time voltage rectifying circuit is rectified and boosted to output high-voltage direct current to charge the high-voltage ceramic capacitor; when the voltage on the high-voltage electrode reaches a breakdown voltage value, discharging occurs between the high-voltage electrode and the high-voltage cathode, so that the tourmaline ore is crushed; when the voltage on the high-voltage electrode reaches the breakdown voltage value again, the next discharge is formed; when the broken tourmaline ore particles are smaller than the aperture of the screen mesh, the broken tourmaline ore particles enter a pulsating device through the screen mesh;
4. the eccentric wheel is driven to rotate by the motor, so that the pulse conical body periodically moves up and down; when the pulsation conical body moves upwards, ascending water flow is formed in the pulsation device, and when the pulsation conical body moves downwards, descending water flow is formed in the pulsation device; the small particle parts in the tourmaline ore on the screen gradually move downwards under the action of the lifting of the water flow on the ore on the screen;
5. the crushed tourmaline ore enters a product collector through a pulsation device.
In the high-voltage electric pulse device, the central shaft of the eccentric wheel is assembled with the motor, and the position where the connecting rod is hinged with the eccentric wheel is positioned outside the central shaft.
In the high-voltage electric pulse device, the water inlet of the water pump is communicated with the water outlet of the water tank, and the water inlet of the water tank is communicated with the water outlet on the side wall of the product collector.
In the high-voltage electric pulse device, the pulse insulation cylinder is made of PVC, and the support frame and the cover plate are made of stainless steel.
In the high-voltage electric pulse device, the screen is made of stainless steel, and the aperture of the screen is 2-10 mm.
In the high-voltage electric pulse device, the high-voltage electrode and the high-voltage cathode are made of stainless steel; the high-voltage electrode is in an inverted conical shape, and the high-voltage cathode is in a conical shape.
In the high-voltage electric pulse device, the lower fixing block and the cover plate are insulated by the insulating washer.
In the high-voltage electric pulse device, the discharge hole of the ore feeding bin is communicated with the lower part of the cover plate, and the feed hole is provided with a valve.
In the high-voltage electric pulse device, the inclined screen is arranged in the product collector, the included angle between the inclined screen and the horizontal plane is 20-40 degrees, the inclined screen is positioned above the water outlet, and the aperture of the inclined screen is 2-10 mm.
In the above high-voltage electric pulse device, the material of the pulse insulation cylinder is PVC.
In the high-voltage electric pulse device, the spring is a compression spring, and the length of the spring in a natural state is larger than the distance between the high-voltage electrode and the lower fixed block.
In the method, the tourmaline ore on the screen is gradually reduced along with the discharge of the broken tourmaline ore from the screen; the high-voltage electrode gradually descends under the action of the elastic force of the spring until the upper fixing block is contacted with the lower fixing block, and at the moment, a gap is reserved between the high-voltage electrode and the high-voltage cathode to prevent short circuit.
In the method, the time interval between two adjacent discharges is a discharge period, and the up-and-down movement of the pulse conical body is a pulse period; controlling the pulse period to be equal to the positive integral multiple of the discharge period by adjusting the rotating speed of the motor; the discharge period is changed along with the first-stage input voltage and the ball gap distance, wherein the first-stage input voltage is 45-90V, the ball gap distance is 15-30 mm, the pulse frequency per minute is 5-45 times, and the discharge period is 1/5-1/45 min.
The power supply voltage is 220V, and the frequency is 50 Hz.
The single-phase voltage regulator, the alternating-current ignition transformer and the high-voltage ceramic capacitor form a pulse power supply which is used for outputting electric pulses, and the rising edge time of the electric pulses is 50-500 ns; the rising edge time is the time when the pulse forms a waveform.
The high-voltage negative electrodes are uniformly distributed on the screen mesh and used for improving the electric crushing efficiency and strengthening the crushing effect.
The above-mentioned breakdown voltage value was 20 kV.
The pulsating device drives water and enables the drumming film to generate alternate expansion and contraction, ascending water flow and descending water flow are alternately formed in the pulsating device and the pulse insulation cylinder, mineral particles meeting the particle size are timely dispersed through the ascending water flow, ore discharge is carried out through the descending water flow, the crushing efficiency is improved, and over-crushing is prevented.
Compared with the traditional sample crushing method, the crushing method with high selectivity has many advantages: the treatment time is short, the production efficiency is high, and the energy consumption is low; the device is provided with a pulse ore discharging device, and compared with crushing equipment with the same power, the processing capacity is expected to be improved by 1.5 to 2 times; promoting the generation and development of microcracks at the grain boundary, further improving the mineral cleavage property, and not destroying the crystal form of the mineral; the mineral particles which meet the requirements of the size fraction are uniformly distributed, which is beneficial to the deep processing of the tourmaline.
The main innovation points of the invention are as follows: because of no requirement of grinding mineral medium, the broken product has no pollution, and is beneficial to the subsequent deep processing of the tourmaline; the ore discharging device is pulsed to discharge ores in time, so that the invalid electric crushing process is reduced, and the treatment efficiency is improved; the self-service telescopic device ensures point-surface contact of the high-voltage electrode and ore, can greatly reduce energy waste, has small energy loss, ensures the generation of a discharge channel and improves the energy utilization rate.
The method can obtain the calcium carbide ore powder with the activated water performance.
Drawings
FIG. 1 is a schematic structural diagram of a high-voltage electric pulse device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a telescopic device according to an embodiment of the present invention;
FIG. 3 is a schematic view of a pulsation device according to an embodiment of the present invention;
FIG. 4 is a schematic view of the product collector of FIG. 1;
FIG. 5 is a schematic diagram of a top view of the screen of FIG. 1 (the portion marked by X is the position of the high voltage negative electrode);
FIG. 6 is a schematic circuit diagram of the high voltage ceramic capacitor and AC ignition transformer portion of FIG. 1;
FIG. 7 is a graph of first-level input voltage versus pulse number for different ball-gap spacings, according to an embodiment of the present invention;
fig. 8 is a scanning electron microscope image of tourmaline ore in example 1 of the present invention;
fig. 9 is a high power scanning electron micrograph of tourmaline crude ore in example 1 of the present invention;
in the figure, 1, a feeding bin, 2, a pulse insulation cylinder, 3, a support frame, 4, a grounding electrode, 5, a pulsation device, 6, a product collector, 7, a water pump, 8, insulation liquid (water), 9, a power supply, 10, an alternating current ignition transformer, 11, a high-voltage ceramic capacitor (with a six-time voltage rectification circuit), 12, a cover plate, 13, a high-voltage lead, 14, a copper rod, 15, a spring, 16, a high-voltage electrode, 17, a high-voltage negative electrode, 18, a screen, 19, a single-phase voltage regulator, 20, a rubber gasket, 21, a lower fixed block, 22, an upper fixed block, 23, a pulsation insulation cylinder, 24, a water inlet, 25, a blowing film, 26, an ore discharge port, 27, an eccentric wheel, 28, a connecting rod, 29, a pulsation cone, 30, an inclined screen, 31 and a water outlet.
Detailed Description
The insulating layers are coated outside the copper rod, the spring, the lower fixing block and the upper fixing block, so that the part of the non-high-voltage electrode is prevented from generating a high-voltage environment, and the waste of electric energy is avoided.
In the embodiment of the invention, the rubber gasket is arranged between the lower part of the spring and the top of the high-voltage electrode and is used for preventing safety accidents caused by abrasion of the insulating layer.
In the embodiment of the invention, a plurality of high-voltage cathodes are uniformly arranged on a screen mesh into a plurality of rows, the distance between two adjacent high-voltage cathodes in each row is equal, the distance between the high-voltage cathodes in two adjacent rows is equal, and the high-voltage cathodes in the two adjacent rows are staggered; the number of high voltage negative electrodes in each row is at least 10, and at least 10 rows are total.
In the embodiment of the invention, the number of the high-voltage electrodes is at least 5, the high-voltage electrodes are uniformly distributed on the cover plate, and the high-voltage electrodes are distributed in one or more rows or in one or more rings.
In the embodiment of the invention, water is stored in the water tank, the water outlet of the water tank is communicated with the water inlet of the water pump, and the water inlet of the water tank is communicated with the water outlet of the product collector.
In the embodiment of the invention, when the high-voltage electric pulse is output, the pulse intensity is 50-800 kV, and the pulse frequency is 15-50 Hz.
In the embodiment of the invention, the pulse insulation cylinder is made of PVC, and the support frame and the cover plate are made of stainless steel.
In the embodiment of the invention, the screen is made of stainless steel, and the aperture of the screen is 2-10 mm.
In the embodiment of the invention, the high-voltage electrode and the high-voltage cathode are made of stainless steel; the high-voltage electrode is in an inverted conical shape, and the high-voltage cathode is in a conical shape.
In the embodiment of the invention, the lower fixing block and the cover plate are insulated by the insulating gasket.
In the embodiment of the invention, the discharge hole of the ore feeding bin is communicated with the lower part of the cover plate, and the feed hole of the ore feeding bin is provided with a valve.
In the embodiment of the invention, the inclined screen is arranged in the product collector, the included angle between the inclined screen and the horizontal plane is 20-40 degrees, the inclined screen is positioned above the water outlet, and the aperture of the inclined screen is 2-10 mm.
In the embodiment of the invention, the wall thickness of the drumming film is 15-20 mm.
The discharge period of the embodiment of the invention is changed along with the first-stage input voltage and the ball gap spacing, wherein the first-stage input voltage is 45-90V, the ball gap spacing is 15-30 mm, the pulse frequency per minute is 5-45 times, and the discharge period is 1/5-1/45 min; as shown in fig. 7.
The structure of the high-voltage electric pulse device in the embodiment of the invention is shown in figure 1, and comprises an ore feeding bin 1, a pulse insulation cylinder 2, a support frame 3, a pulse device, a product collector and a power supply 9; the upper part of the pulse insulation cylinder is cylindrical, the lower part of the pulse insulation cylinder is in an inverted round table shape, the top of the pulse insulation cylinder is provided with a cover plate 12, and a channel is arranged on the cover plate 12 and communicated with the ore feeding bin 1; the side wall of the insulating cylinder body 2 is sleeved with a support frame 3, and the bottom of the insulating cylinder body is assembled with the pulsation device;
the structure of the pulsation device is shown in fig. 3, and the pulsation device comprises a pulsation insulating cylinder 23, a blast diaphragm 25, a mine discharge port 26, a pulsation conical body 29, a connecting rod 28 and an eccentric wheel 27, wherein a water inlet 24 is formed in the side wall of the pulsation insulating cylinder 23 and is communicated with an outlet of a water pump 7, the bottom of the pulsation insulating cylinder 23 is connected with the top of the blast diaphragm 25, the bottom of the blast diaphragm 25 is connected with the mine discharge port 26, the pulsation conical body 29 is arranged in the mine discharge port 26, the bottom of the pulsation conical body 29 is hinged with one end of the connecting rod 28, the other end of the connecting rod 28 is hinged with the eccentric wheel 27, and the eccentric wheel 27;
the material of the drumming diaphragm 25 is rubber;
the ore discharge port 26 is communicated with the feed inlet of the product collector, the structure of the product collector is shown in figure 4, and the side wall of the product collector is provided with a water outlet 31;
the cover plate 12 is provided with a plurality of telescopic devices, the telescopic devices are structurally shown in figure 2 and comprise a copper bar 14, a high-voltage electrode 16, an upper fixing block 22, a lower fixing block 21 and a spring 15, the upper fixing block 22 is fixedly connected to the upper part of the copper bar 14, the lower fixing block 21 is fixed on the cover plate 12, the copper bar 14 penetrates through the lower fixing block 21 and is in sliding sealing connection with the lower fixing block 21, the high-voltage electrode 16 is fixedly connected with the bottom of the copper bar 14, the top end of the spring 15 is fixedly connected with the lower fixing block 21, the bottom end of the spring 15 is fixedly connected with the high-voltage electrode 16, and the spring 15 surrounds;
the copper bars 14 of the plurality of telescopic devices are connected in parallel on the two groups of high-voltage ceramic capacitors 11 through high-voltage leads 13, the high-voltage ceramic capacitors 11 are assembled with the alternating current ignition transformer 10, and the alternating current ignition transformer 10 is assembled with the power supply 9 through a one-way voltage regulator 19;
wherein the circuit of the high voltage ceramic capacitor and the ac ignition transformer portion is as shown in fig. 6; each of the two groups of high-voltage ceramic capacitors comprises four high-voltage ceramic capacitors; the power supply outputs high-voltage direct current after transformation by a single-phase voltage regulator, boosting by an alternating-current ignition transformer and rectification and boosting by a six-time voltage rectifying circuit, and charges a high-voltage ceramic capacitor, wherein the rise time of the charging voltage is microsecond; after the voltage of each capacitor reaches the voltage for conducting the gas switch, outputting high-voltage electric pulses with the rise time in nanosecond level, and loading the high-voltage electric pulses onto a load electrode through a high-voltage lead;
the bottom end of the pulse insulation cylinder 2 is fixedly connected with a grounding electrode 4, and the grounding electrode 4 penetrates through the support frame 3 to be grounded;
a screen 18 is fixedly installed at the bottom end of the cylindrical part of the pulse insulation cylinder 2, and a plurality of high-voltage cathodes 17 are installed on the screen 18, and the structure is shown in fig. 5;
the central shaft of the eccentric wheel 27 is assembled with the motor, and the position where the connecting rod 28 is hinged with the eccentric wheel 27 is positioned outside the central shaft;
the water inlet of the water pump 7 is communicated with the water outlet of the water tank, and the water inlet of the water tank is communicated with the water outlet 31 on the side wall of the product collector; the water tank is filled with water as an insulating liquid 8.
In the embodiment of the invention, the high-voltage negative electrodes are uniformly distributed on the screen mesh and used for improving the electric crushing efficiency and strengthening the crushing effect.
Example 1
The tourmaline raw ore is from inner Mongolia red peak, and the results of chemical multi-element analysis in percentage by mass are shown in Table 1;
TABLE 1
| Components | B2O3 | SiO2 | Al2O3 | TFe | MgO | CaO | Na |
| Content/% | 7.27 | 50.05 | 18.60 | 11.37 | 3.33 | 1.76 | 0.95 |
| Components | TiO2 | FeO | P | K | S | Loss of heat | |
| Content/% | 0.84 | 0.25 | 0.078 | 0.058 | ＜0.004 | 1.98 |
As can be seen from Table 1, the tourmaline ore contains SiO as the main component250.05% by weight, and Al by weight2O3And accounts for 18.60%. Total iron content of 11.37%, wherein magnetic iron content is 0.25%, B2O3The content of (A) is 7.27%, and the content of magnesium oxide is 3.33%; the scanning electron microscope analysis map of the crude ore is shown in fig. 8 and fig. 9;
the method comprises the following steps: starting a water pump by adopting a high-voltage electric pulse device, so that water continuously enters a pulsating insulation cylinder of the pulsating device and is continuously discharged from a water outlet of a product collector; water is used as insulating liquid to fill the interior of the pulsating insulating cylinder and the product collector, and the liquid level is higher than the bottom end of the high-voltage electrode;
the tourmaline ore is placed in an ore feeding bin and is conveyed into the pulse insulation cylinder body through the ore feeding bin; the tourmaline ore is stacked on the screen, and the tourmaline ore at the top is contacted with the high-voltage electrode;
the power supply is started, the current is transformed by the single-phase voltage regulator, the alternating current ignition transformer is boosted, and the six-time voltage rectifying circuit is rectified and boosted to output high-voltage direct current to charge the high-voltage ceramic capacitor; when the voltage on the high-voltage electrode reaches a breakdown voltage value, discharging occurs between the high-voltage electrode and the high-voltage cathode, so that the tourmaline ore is crushed; when the voltage on the high-voltage electrode reaches the breakdown voltage value again, the next discharge is formed; when the broken tourmaline ore particles are smaller than the aperture of the screen mesh, the broken tourmaline ore particles enter a pulsating device through the screen mesh;
the eccentric wheel is driven to rotate by the motor, so that the pulse conical body periodically moves up and down; when the pulsation conical body moves upwards, ascending water flow is formed in the pulsation device, and when the pulsation conical body moves downwards, descending water flow is formed in the pulsation device; the small particle parts in the tourmaline ore on the screen gradually move downwards under the action of the lifting of the water flow on the ore on the screen;
the crushed tourmaline ore enters a product collector through a pulsation device;
the tourmaline ore on the screen is gradually reduced along with the discharge of the broken tourmaline ore from the screen; the high-voltage electrode gradually descends under the action of the elastic force of the spring until the upper fixed block is contacted with the lower fixed block, and a gap is formed between the high-voltage electrode and the high-voltage cathode to prevent short circuit;
the time interval between two adjacent discharges is a discharge period, and the up-and-down movement of the pulse conical body is a pulse period; controlling the pulse period to be equal to the positive integral multiple of the discharge period by adjusting the rotating speed of the motor; the discharge period is changed along with the first-stage input voltage and the ball gap distance, wherein the first-stage input voltage is 45-90V, the ball gap distance is 15-30 mm, the pulse frequency per minute is 5-45 times, and the discharge period is 1/5-1/45 min;
the power supply voltage is 220V, and the frequency is 50 Hz.
The single-phase voltage regulator, the alternating current ignition transformer and the high-voltage ceramic capacitor form a pulse power supply which is used for outputting electric pulses, and the rising edge time of the electric pulses is 50-500 ns; the rising edge time is the time for forming a waveform by the pulse;
the breakdown voltage value is 20 kV;
the pulsating device drives water and enables the drumming film to generate alternate expansion and contraction, ascending water flow and descending water flow are alternately formed in the pulsating device and the pulse insulation cylinder, mineral particles meeting the particle size are dispersed in time through the ascending water flow, and ore discharge is performed through the descending water flow, so that the crushing efficiency is improved, and over-crushing is prevented;
adding crushed tourmaline serving as activated tourmaline into deionized water, wherein the mass ratio of the activated tourmaline to water is 1:50, stirring at 17 ℃ for 10min, performing activated water test, and detecting the surface tension, dissolved oxygen, conductivity, water molecule cluster and other performance change conditions of water activated by tourmaline; the water properties before and after the test are shown in table 2;
TABLE 2
As can be seen from table 2, after the water is activated by tourmaline, hydrogen bonds in the water are weakened or broken, which destroys the interaction between molecules of the surface layer and between molecules in the liquid and molecules of the surface layer, so that the surface tension of the water is reduced, and the surface tension is reduced along with the reduction of water molecule clusters; the better the pretreatment effect of the tourmaline is, the better the activation effect of the tourmaline on water is, and the smaller the surface tension of the activated water is; the surface tension of the pretreated tourmaline activated water is reduced from 72.17mN/m to 71.82mN/m, and the reduction amplitude is very obvious;
the dissolved oxygen in the pretreated tourmaline activated water can reach up to 10.35mg/g, which is higher than the dissolved oxygen in the non-pretreated tourmaline activated water by 9.57mg/g, so that the high-voltage electric pulse can improve the performance of the tourmaline on the dissolved oxygen in the water;
the better the pretreatment effect of the tourmaline, the better the activation performance of the pretreated tourmaline, and the higher the conductivity of the activated water, and the highest conductivity of the activated water of the pretreated tourmaline can reach 1.13 mus/cm. The electric conductivity is 0.53 mu s/cm higher than that of the tourmaline activated water without pretreatment, and the visible high-voltage electric pulse can improve the activated water performance of the tourmaline and the electric conductivity of the water;
the average relative size of the liquid water clusters may be determined by17The O NMR half-height width is well represented, the wider the nuclear magnetic resonance spectral line is, the larger the liquid water molecule cluster is, and conversely, the narrower the nuclear magnetic resonance spectral line is, the smaller the liquid water molecule cluster is; the tourmaline pretreated by high-voltage electric pulse is tested and activated to obtain water molecules17The minimum half height and width of the O nuclear magnetic resonance can reach 464Hz, and the water molecule is activated compared with the water molecule activated by the tourmaline without pretreatment17The full width at half maximum of the O nuclear magnetic resonance is 766Hz, which shows that the high-voltage electric pulse can improve the water activation performance of the tourmaline.
Example 2
The tourmaline pure mineral is from Altai in Xinjiang, has the granularity of 2-12 mm, is dark gray and has a chemical formula of NaFe3Al6Si6O18(BO3)3(OH)4(ii) a Detecting chemical components of a sample by using an EPMA-1720 electronic probe, wherein the accelerating voltage is 15kV, the beam current is 2 multiplied by 10 < -8 >, and the beam spot diameter is 0.5 mu m; the electron probe detection analysis chemical components are shown in the table 3 according to the mass percentage;
TABLE 3
| Main component | SiO2 | Al2O3 | MgO | TFe | |
| Content/% | 38.45 | 29.67 | 9.89 | 3.29 |
The main component of the selected iron-magnesium tourmaline is SiO2、Al2O3MgO and FeO;
the procedure is as in example 1;
the activated water test was the same as example 1; the water properties before and after the test are shown in table 4;
TABLE 4
The surface tension of the pretreated tourmaline activated water is reduced from 73.45mN/m to 71.65 mN/m;
the dissolved oxygen in the pretreated tourmaline activated water can reach up to 10.14mg/g, which is higher than the dissolved oxygen in the non-pretreated tourmaline activated water by 9.06 mg/g;
the conductivity of the pretreated tourmaline activated water can reach 1.03 mu s/cm at most, and is 0.52 mu s/cm higher than that of the tourmaline activated water without pretreatment;
the tourmaline pretreated by high-voltage electric pulse is tested and activated to obtain water molecules17The maximum width at half maximum of the O nuclear magnetic resonance can reach 488Hz, and the water molecules are activated compared with the water molecules of the tourmaline without pretreatment17The full width at half maximum of O nuclear magnetic resonance is 744 Hz.
Claims (6)
1. A method for promoting tourmaline activation by using high-voltage electric pulse is characterized in that a high-voltage electric pulse device is adopted, and comprises a feeding bin, a pulse insulation cylinder, a support frame, a pulsation device, a product collector and a power supply; the upper part of the pulse insulation cylinder is cylindrical, the lower part of the pulse insulation cylinder is in an inverted round table shape, the top of the pulse insulation cylinder is provided with a cover plate, and a channel is arranged on the cover plate and communicated with the ore feeding bin; the side wall of the insulating cylinder body is sleeved with a support frame, and the bottom of the insulating cylinder body is assembled with the pulsation device; the pulsation device consists of a pulsation insulating cylinder, a drumming diaphragm, an ore discharge port, a pulsation conical body, a connecting rod and an eccentric wheel, wherein a water inlet is formed in the side wall of the pulsation insulating cylinder and communicated with a water pump; the material of the drumming diaphragm is rubber; the ore discharge port is communicated with the feed inlet of the product collector, and the side wall of the product collector is provided with a water outlet; the cover plate is provided with a plurality of telescopic devices, each telescopic device consists of a copper rod, a high-voltage electrode, an upper fixed block, a lower fixed block and a spring, the upper fixed block is fixedly connected to the upper part of the copper rod, the lower fixed block is fixed on the cover plate, the copper rod penetrates through the lower fixed block and is in sliding sealing connection with the lower fixed block, the high-voltage electrode is fixedly connected with the bottom of the copper rod, the top end of the spring is fixedly connected with the lower fixed block, the bottom end of the spring is fixedly connected with the high-voltage electrode, and the spring is surrounded; the copper bars of the telescopic devices are connected in parallel on the two groups of high-voltage ceramic capacitors through high-voltage leads, the high-voltage ceramic capacitors are assembled with the alternating-current ignition transformer, and the alternating-current ignition transformer is assembled with the power supply through a one-way voltage regulator; the bottom end of the pulse insulation cylinder is fixedly connected with a grounding electrode, and the grounding electrode penetrates through the supporting frame to be grounded; the bottom end of the cylindrical part of the pulse insulation cylinder is fixedly provided with a screen, and a plurality of high-voltage cathodes are arranged on the screen; the middle shaft of the eccentric wheel is assembled with the motor, and the position where the connecting rod is hinged with the eccentric wheel is positioned outside the middle shaft; the water inlet of the water pump is communicated with the water outlet of the water tank, and the water inlet of the water tank is communicated with the water outlet on the side wall of the product collector; the spring is a compression spring, and the length of the spring in a natural state is greater than the distance between the high-voltage electrode and the lower fixed block;
the method comprises the following steps:
(1) starting a water pump to enable water to continuously enter a pulsating insulation cylinder of the pulsating device and be continuously discharged from a water outlet of the product collector; water is used as insulating liquid to fill the interior of the pulsating insulating cylinder and the product collector, and the liquid level is higher than the bottom end of the high-voltage electrode;
(2) the tourmaline ore is placed in an ore feeding bin and is conveyed into the pulse insulation cylinder body through the ore feeding bin; the tourmaline ore is stacked on the screen, and the tourmaline ore at the top is contacted with the high-voltage electrode;
(3) the power supply is started, the current is transformed by the single-phase voltage regulator, the alternating current ignition transformer is boosted, and the six-time voltage rectifying circuit is rectified and boosted to output high-voltage direct current to charge the high-voltage ceramic capacitor; when the voltage on the high-voltage electrode reaches a breakdown voltage value, discharging occurs between the high-voltage electrode and the high-voltage cathode, so that the tourmaline ore is crushed; when the voltage on the high-voltage electrode reaches the breakdown voltage value again, the next discharge is formed; when the broken tourmaline ore particles are smaller than the aperture of the screen mesh, the broken tourmaline ore particles enter a pulsating device through the screen mesh; the single-phase voltage regulator, the alternating current ignition transformer and the high-voltage ceramic capacitor form a pulse power supply which is used for outputting electric pulses, and the rising edge time of the electric pulses is 50-500 ns; the rising edge time is the time for forming a waveform by the pulse;
(4) the eccentric wheel is driven to rotate by the motor, so that the pulse conical body periodically moves up and down; when the pulsation conical body moves upwards, ascending water flow is formed in the pulsation device, and when the pulsation conical body moves downwards, descending water flow is formed in the pulsation device; the small particle parts in the tourmaline ore on the screen gradually move downwards under the action of the lifting of the water flow on the ore on the screen;
(5) the crushed tourmaline ore enters a product collector through a pulsation device.
2. The method of claim 1, wherein the high voltage electric pulse apparatus is made of stainless steel, and the mesh has a diameter of 2-10 mm.
3. The method of claim 1, wherein the high voltage electric pulse device comprises a high voltage electrode and a high voltage cathode made of stainless steel; the high-voltage electrode is in an inverted conical shape, and the high-voltage cathode is in a conical shape.
4. The method for promoting the activation of tourmaline according to claim 1, wherein an inclined screen is arranged in the product collector of the high voltage electric pulse device, the inclined screen forms an angle of 20 to 40 degrees with the horizontal plane, the inclined screen is positioned above the water outlet, and the aperture of the inclined screen is 2 to 10 mm.
5. The method for promoting the activation of tourmaline according to claim 1 using high voltage electric pulses, wherein in the step (3), as the tourmaline ore is crushed and discharged from the mesh, the tourmaline ore on the mesh is gradually decreased; the high-voltage electrode gradually descends under the action of the elastic force of the spring until the upper fixing block is contacted with the lower fixing block, and at the moment, a gap is reserved between the high-voltage electrode and the high-voltage cathode to prevent short circuit.
6. The method of claim 1, wherein in step (3), the time interval between two adjacent discharges is a discharge period, and the pulse cone moves up and down once to form a pulse period; controlling the pulse period to be equal to the positive integral multiple of the discharge period by adjusting the rotating speed of the motor; the discharge period is changed along with the first-stage input voltage and the ball gap distance, wherein the first-stage input voltage is 45-90V, the ball gap distance is 15-30 mm, the pulse frequency per minute is 5-45 times, and the discharge period is 1/5-1/45 min.
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| CN111034895A (en) * | 2019-12-31 | 2020-04-21 | 华南理工大学 | Multi-site shapeable pulse electric field processing device and method |
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