128 results about "Electrostatic separation" patented technology

The invention relates to a method and device for preparing Ti-TiN core-shell powder, and the method comprises the steps that in an atomizing chamber, mixed gas is blown to a molten pool on the surface of an electrode bar, liquid drops are subjected to primary refining and primary coating nitrogen increasing treatment, the mixed gas comprises argon and nitrogen, and the volume content of the nitrogen does not exceed 10%; high-temperature pure nitrogen is blown to the flying liquid drops, so that secondary refining and secondary coating nitrogen increasing treatment are carried out, and the temperature of the high-temperature pure nitrogen is 1000-1500 DEG C; the powder which is not fully coated and the powder which is fully coated are separated through an electrostatic separation device; and the powder which is not fully coated is subjected to third-time coating nitrogen increasing treatment, so that the Ti-TiN core-shell structure powder is obtained. The prepared powder is core-shell powder with large thickness and small fineness, the yield is high, the shell layer structure is uniform, the sphericity degree of the powder is high, and the preparation efficiency is high.

The invention provides an electrostatic separation system, method and device based on the Internet of Things and artificial intelligence, and relates to the technical field of waste recovery and resource regeneration, the system comprises a feeding system, a receiving system, an electrified processing module, an electric field control module, an artificial intelligence optimization system and an Internet of Things system; the Internet of Things system is used for collecting feature data of the materials and operation data of the electrostatic separation system and carrying out data processing and analysis; the artificial intelligence optimization system is used for generating an optimal electric field adjustment instruction and an electrification control strategy according to the received feature data and the operation data; the electrification processing module is used for adjusting an electrification mode and an electrification parameter of the material according to an electrification control strategy; the electric field control module is used for optimizing electric field distribution according to the electric field adjusting instruction; and the material receiving system is used for receiving the materials subjected to electrostatic separation. The system response capability, the sorting precision and the energy efficiency level can be greatly improved, and intelligent optimization and self-adaptive adjustment of the electrostatic sorting process are achieved.

The invention belongs to the technical field of waste plastic recycling, and provides an electrostatic separation method and device for plastic particles, and the electrostatic separation method for the plastic particles comprises the steps that conductive materials are applied to the surfaces of the plastic particles to be separated, so that composite coatings are formed on the surfaces of the plastic particles; bombarding the plastic particles after the composite coating is applied through plasma; the bombarded plastic particles are cleaned through high-frequency ultrasonic waves; and selecting a corresponding ionization mode according to the type of the plastic particles so as to sort the cleaned plastic particles. According to the electrostatic separation method for the plastic particles, the separation efficiency and purity of the plastic particles can be greatly improved.

The invention relates to the technical field of soil treatment, and particularly discloses a soil micro-plastic electrostatic separation device and method.The soil micro-plastic electrostatic separation device comprises a sample pool, an electrostatic adsorption mechanism is arranged on one side of the sample pool, and the electrostatic adsorption mechanism is connected with an electrostatic discharge generator through a wire; the electrostatic adsorption mechanism comprises an adsorption plate and a connecting handle; the bottom box and the heightening frame bodies are made of wood, the height of the sample pool can be adjusted by installing the heightening frame bodies in an assembling mode, a nylon coating is arranged on the outer side of an adsorption plate and used for adsorbing micro-plastics and eradicating the risk of high-voltage electric leakage, and the height of the adsorption plate can be adjusted through an arranged supporting assembly; the particle size range of the micro-plastic covered by electrostatic adsorption is wide, compared with a traditional method, the recovery rate is remarkably improved, and the original form of the micro-plastic and the natural structure of soil are protected through normal-temperature physical separation and no reagent addition.

The invention relates to the field of high polymer material recycling, in particular to a technology for manufacturing a conveyor belt by recycling polytetrafluoroethylene. According to the process, the recycled polytetrafluoroethylene material is classified and collected according to sources and the like, impurities are removed through magnetic separation and electrostatic separation, and then microwave-assisted cleaning and activation are performed; then, a bio-based additive, a degradable polymer, a photocatalytic self-cleaning material and the like are adopted for modification treatment, so that the multi-aspect performance of the material is improved; then, the material is processed into the shape of a conveyor belt through a water-assisted injection molding or hot press molding process, and after molding, post-treatment is carried out through plant extract coating protection, recoverable and easy-to-disassemble design. The process is suitable for the requirements of conveyor belts in multiple fields, resource recycling is achieved, environmental protection and economic benefits are achieved, and the manufactured conveyor belt is excellent in performance and can meet the requirements of different working conditions.

The invention discloses a fly ash pretreatment method and a preparation method and application of an anti-corrosion and wear-resistant coating, and relates to the technical field of fly ash treatment, and the method comprises the following steps: s1, dispersing inferior fly ash in water, and then uniformly stirring to form ore pulp; s2, an emulsifying agent is dissolved in water, a collecting agent is added under stirring, and then an O / W type emulsifying collecting agent is obtained; s3, the prepared O / W type emulsifying collecting agent and foaming agent are added into the ore pulp, first-stage flotation solid removal treatment is conducted after sufficient stirring, and first-stage solid-removed fly ash is obtained; s4, drying the obtained first-stage solid-removed fly ash, and then carrying out second-stage electric separation solid-removed treatment to obtain second-stage solid-removed fly ash; and s5, adding a modifier and water into the obtained secondary solid-removed fly ash, carrying out wet grinding, taking out the fly ash after the modifier fully reacts with the fly ash, taking out the fly ash, drying the fly ash, and carrying out dry grinding to obtain the fly ash subjected to chambering modification. Therefore, the problem of incapability of direct resource utilization due to excessive impurity content of fly ash in the power plant in the prior art is avoided.

The invention relates to the technical field of automatic control, in particular to an automatic closed-loop control method and system for an electric separation production line. The method comprises the following steps: acquiring a stock bin level and equipment operation state parameters; the obtained material level of the stock bin and the equipment operation state parameters are preprocessed; according to the preprocessed stock bin material level and the preprocessed equipment operation state parameters, the equipment operation parameters are adjusted through a step-by-step feedback control strategy; and the balance of the material level of the material bin is maintained by monitoring and adjusting the operation state parameters of the equipment in real time. The blanking amount is accurately controlled, the subjectivity of manual adjustment and the inadaptability of a fixed blanking mode are eliminated, the stability and consistency of material supply are guaranteed, and stable operation of subsequent procedures is facilitated.

The invention provides a plastic sorting system and method, ionization and electrostatic parameters can be regulated and controlled in real time, and the plastic sorting system comprises a feeding conveying system for conveying according to feeding speeds corresponding to different materials; the ionization equipment is used for uniformly electrifying the surfaces of the to-be-sorted materials through discharging, so that different plastics in the to-be-sorted materials are respectively electrified; the electrostatic separation equipment enables the plastics with different electric quantities to deviate from a transmission track through an electrostatic field; a material collecting device; and the control system is connected with the feeding conveying system, the ionization equipment, the electrostatic separation equipment and the material collecting device, and is used for adjusting at least one of ionization voltage of the ionization area, electrostatic field intensity of the electrostatic separation area and the position of the material collecting device according to the material sorting parameters and a pre-established plastic sorting control model. By means of the plastic sorting device, plastic in the to-be-sorted materials can be efficiently separated and recycled, environmental pollution is reduced, and resource cyclic utilization is achieved.

The utility model belongs to the field of separation devices, and particularly relates to a high-voltage electrostatic separation device which comprises a box body, a supporting rod is fixedly connected to the bottom of the box body, an anti-skid pad is fixedly connected to the bottom of the supporting rod, the anti-skid pad is made of rubber, a feeding port is fixedly connected to the top of the box body, and a discharging port is fixedly connected to the bottom of the box body. And a plurality of guide grooves are fixedly connected to the interior of the box body. According to the material distributing device, through the design of the material distributing plates, the material distributing plates can separate the storage space of the materials in the barrel body, the rotating shaft and the material distributing plates can be driven to rotate under the action of the rotating motor, and when the two material distributing plates with the materials are overturned to the lower portion of the barrel body, the materials are separated from the material distributing plates. And internal materials can be automatically input into the feeding port through the discharging port so that the materials in the device can be added, the discharging speed can be controlled by controlling work of the rotating motor, and the situation that the separation effect is affected due to the fact that the amount of the materials added at a time is too large can be avoided.

The present invention relates to the technical field of chemical solid waste treatment. Specifically, it relates to a method for recovering and reducing ilmenite concentrate and zircon sand from ilmenite magnetic separation tailings and its application. The ilmenite magnetic separation tailings are subjected to screening, gravity separation roughing separation, and magnetic separation roughing to obtain magnetic separation roughing concentrate and magnetic separation roughing tailings; the magnetic separation roughing tailings are subjected to the first scavenging to obtain first-stage scavenging concentrate and first-stage scavenging tailings; the first-stage scavenging concentrate is subjected to the first electrostatic separation concentration to obtain first-stage electrostatic separation concentration concentrate and first-stage electrostatic separation concentration tailings; the first-stage scavenging tailings are subjected to the second scavenging to obtain second-stage scavenging concentrate and second-stage scavenging tailings, and the second-stage scavenging concentrate is subjected to the second electrostatic separation concentration to obtain second-stage electrostatic separation concentration concentrate and second-stage electrostatic separation concentration tailings; the second-stage scavenging tailings are subjected to electrostatic separation scavenging to obtain electrostatic separation scavenging concentrate and electrostatic separation scavenging tailings. The above-mentioned concentrates are mixed to obtain ilmenite concentrate; the first-stage electrostatic separation concentration tailings, the second-stage electrostatic separation concentration tailings, and the electrostatic separation scavenging tailings are mixed and subjected to gravity separation concentration to obtain zircon sand. This method can recover ilmenite concentrate and zircon sand.

This invention discloses an efficient separation and beneficiation method for scheelite, wolframite, and cassiterite in a tungsten-tin mixed concentrate, comprising the following steps: (1) pre-treatment by grinding, flotation desulfurization, and weak magnetic separation to remove iron from the tungsten-tin mixed concentrate to obtain weak magnetic tailings; (2) concentration and drying of the weak magnetic tailings obtained in step (1) followed by electrostatic separation to obtain electrostatic concentrate and electrostatic tailings; (3) stirring and slurry conditioning of the electrostatic concentrate obtained in step (2) followed by strong magnetic separation to obtain strong magnetic concentrate and strong magnetic tailings; stirring and slurry conditioning of the electrostatic tailings obtained in step (2) followed by scheelite upgrading flotation to obtain scheelite concentrate and scheelite flotation tailings. Based on the differences in conductivity, magnetism, and flotation properties of scheelite, wolframite, and cassiterite, this invention employs a “cassiterite / wolframite electrostatic separation-wolframite / cassiterite strong magnetic separation-scheelite upgrading flotation” process to achieve efficient separation of wolframite, scheelite, and cassiterite.

The present invention discloses a method and apparatus for electrostatic separation of trichomes from plant biomass, addressing the limitations of conventional separation techniques. The method relies on differences in electrical properties of trichomes and plant material, utilizing an external electric field. A multi-component electrostatic separation assembly may prepare and separate one or more samples, thereby incorporating a dispensing component, a pipeline component, and a separation chamber comprising at least one electrode assembly. Moreover, the present invention may also provide for electrode assemblies that feature self-cleaning mechanisms.

The utility model relates to the technical field of metal and plastic sorting machines, and provides a clean plastic sheet sorting machine which comprises a bottom frame and a conveying belt, the conveying belt is arranged in the bottom frame, an outer frame is fixed to the bottom frame, a screening assembly is arranged on the outer frame, and a driving motor is installed on the side surface of the bottom frame. The electrostatic separation assembly is arranged on the bottom frame, the annular frame is fixed between the outer frames, a plurality of springs are arranged on the inner wall of the annular frame, a sieve tray is connected between the springs, arc-shaped grooves are formed in the periphery of the outer surface of the sieve tray, and a driving motor is fixedly connected to the annular frame. By means of the technical scheme, the problems that in the prior art, a large number of tiny waste chips exist in smashed automobile materials, some waste chips are attached to a conveying belt and are inconvenient to collect, some waste chips are attached to the conveying belt and are inconvenient to collect, and the device needs to sort out plastic firstly and then sort out metal, so that the labor intensity of workers is lowered are solved. And switching is carried out continuously, which is troublesome.

This utility model discloses a vibrating screen for spreading materials in an electrostatic separator, including a mounting frame, a vibrating frame, and an electrostatic separator disposed above the vibrating frame. A screen plate is disposed inside the vibrating frame to divide the inner side of the vibrating frame into a vibrating chamber and a vibrating separation chamber. The vibrating frame and screen plate are inclined downwards from right to left. A vibrating motor is disposed on the lower side of the vibrating frame. A material conveying device is mounted on the inlet of the vibrating frame. A first discharge cylinder and a second discharge cylinder are respectively connected to the left side of the vibrating separation chamber and the vibrating chamber. Two collection frames are disposed on the left side of the mounting frame. The upper parts of the two collection frames are respectively connected to a first receiving pipe and a second receiving pipe, which are located directly below the first and second discharge cylinders. A storage frame is inserted into each of the two collection frames. A pushing component is disposed inside the vibrating frame for pushing out residual materials from the vibrating chamber and the vibrating separation chamber. This utility model has the advantage of facilitating material collection.

The invention belongs to the technical field of catalytic cracking slurry oil removal solid catalyst, and discloses electrostatic adsorption separation equipment, which comprises a separator body, a raw material inlet, a purified raw material outlet, a high-voltage electricity inlet, a backwashing solvent outlet, a plurality of groups of backwashing solvent inlets and a hand hole, a transformer is also arranged at the top of the separator body close to the high-voltage lead-in port, and extends into the high-voltage lead-in port through a high-voltage flexible connector to be connected with the electrode; the electrode is hung on the electrode beam; a plurality of groups of filler supporting plates and backwashing devices are arranged in an array manner in the direction perpendicular to the length direction of the separator body; the backwashing device is connected with the backwashing solvent inlet; the electrode extends from the topmost filler support plate to the bottommost filler support plate. According to different heights and cleaning requirements of the electrostatic separator, the arrangement of the filler bed layers in the electrostatic separator is realized by adopting a mode of multiple layers of filler supporting plates and multiple layers of backwashing pipes, fluidization cleaning is realized, and the cleaning efficiency and effect are improved.

The invention relates to the field of tea processing, and discloses a multi-stage impurity removal and electrostatic sorting ground tea stem and leaf separation system which comprises a feeding frame, a primary treatment mechanism is arranged at the bottom of the feeding frame, a separation treatment mechanism is arranged at the bottom of the primary treatment mechanism, and an electrostatic screening mechanism is arranged at the bottom of the separation treatment mechanism. The primary treatment mechanism comprises a sundry treatment bin, the outer wall of the sundry treatment bin is arranged at the bottom of a feeding frame, the upper portion of the outer wall of the sundry treatment bin is in threaded connection with a threaded column, and the top of the feeding frame is fixedly connected with a buffering assembly. After the roller motor is powered on, the electrode cylinder is connected with the high-voltage static negative electrode and the grounded distribution plate is connected with the positive electrode to form a stable electric field gap, the to-be-selected raw materials are precisely separated in the electric field according to the dielectric property difference, the raw material conveying continuity and the separation and screening precision are improved, and then the separation efficiency and quality are improved.

The invention relates to an electrostatic separator, and relates to the technical field of electrostatic separation, the electrostatic separator comprises a separation frame, a feeding hopper is arranged at the top of the separation frame, a discharging hopper is arranged on the side face of the separation frame, a separation mechanism, an ionization mechanism and a conveying mechanism are arranged in the separation frame, the ionization mechanism is arranged on the outer side of the separation mechanism, and the conveying mechanism is arranged on the outer side of the separation mechanism. The conveying mechanisms are arranged below the sorting mechanisms and communicate with the discharging hopper, the electrostatic sorting machine feeds plastic and metal mixed materials into the sorting frame through the feeding hopper, the sorting mechanisms sort the mixed materials in the sorting frame, and the discharging hopper is communicated with the conveying mechanisms. The ionization mechanism generates an electrostatic field to enable mixed materials to carry electrons or lose electrons, automatic feeding, electrostatic separation and automatic discharging of the materials are achieved through the structure, the separation efficiency and the automation degree are improved, separation is based on the electrostatic principle through the application of the ionization mechanism, the device is suitable for separating conductive and non-conductive particles, and the application range is widened.

The invention discloses a needle belt type electrostatic separation device for separating plastic film residues in straw feed, and belongs to the technical field of agricultural material separation, the needle belt type electrostatic separation device comprises a first metal type conveying belt and a second metal type conveying belt, and electrode supports are symmetrically arranged on the two sides of the first metal type conveying belt and the two sides of the second metal type conveying belt; electret discharge rods are arranged above the first metal type conveying belt and the second metal type conveying belt through the electrode supports respectively, residual film collecting boxes are arranged on the lower surfaces of the tail ends of the first metal type conveying belt and the second metal type conveying belt, and static brushes are arranged in the residual film collecting boxes. A feeding device is arranged above the head end of the first metal type conveying belt, a turnover device is arranged at the tail end of the first metal type conveying belt, and a straw feed collecting box is arranged below the tail end of the second metal type conveying belt. By the adoption of the structure, efficient separation of residual films and straw feed is achieved, and the separation efficiency and the overall separation rate are improved.

The invention relates to a fiber foreign matter sorting machine which comprises a foreign matter collecting system used for collecting and conveying foreign matters; the discharging assembly is used for generating and accumulating electrostatic charges; the electromagnetic vibration feeder is used for conveying materials; the electromagnetic vibration feeder comprises a conveying channel, a mounting opening and an adhesive tape opening are formed in the conveying channel, and the discharging assembly is located on the mounting opening. The foreign matter collecting system comprises a rack, an unwinding roller and a winding roller, the unwinding roller and the winding roller are arranged on the rack, an adhesive tape roll is arranged on the unwinding roller, and an adhesive tape on the adhesive tape roll penetrates through an adhesive tape opening to be connected with the winding roller. The fiber foreign matter sorting machine has the following advantages that fiber foreign matters in graphite powder are subjected to electrostatic sorting, and the separation effect is good; the sorting operation is carried out in the conveying channel, so that the conveying of the materials and the sorting of fiber foreign matters are synchronously carried out, and the working efficiency is high; the adhesive tape surface is adopted to adhere fiber foreign matters, the collection effect is good, and the removal efficiency is high.

The invention relates to a device for mechanochemical activation. The device has a mill (10), said mill (10) having a material inlet (12) and a material outlet (14). The device has a first separating device (20) arranged downstream of the mill (10) in the material flow, and the device has a product outlet (30) arranged downstream of the first separating device (20) in the material flow. The invention is characterized in that the first separating device (20) is an electrostatic separator, wherein the electrostatic separator has a first outlet (22) for charged particles and a second outlet (24) for discharged particles. The first outlet (22) is connected to the product outlet (30), and the second outlet (24) is connected to a return line (40), said return line (40) being connected to the material inlet (12) of the mill (10).

The invention discloses a carbon black granulation forming screening electrostatic separation method and equipment, and relates to the technical field of carbon black production and particle separation. The carbon black particles are electrified in the electrified box and repel each other, and the vibration electrostatic screen with the same polarity as the particle charges is matched, so that the bounce and dispersion performance of the particles is enhanced, and more efficient screening is facilitated. The photoelectric monitoring mechanism is used for monitoring the condition of carbon black particles falling from each area of the vibrating electrostatic screen in real time, and whether the screen is blocked or not and the blocking position can be accurately judged by comparing the falling number of the particles within the preset duration with a standard reference value. When blockage is found, the corresponding area of the electrostatic plate is electrified to generate the electric polarity opposite to that of the carbon black particles, the blockage particles are attracted in a targeted mode, and accurate localized blockage dredging is achieved. Meanwhile, different from a traditional negative pressure dredging mode, negative pressure is prevented from being generated on all screen holes of the whole screen plate, new blockage is prevented from being generated, and the screening efficiency and stability are greatly improved.

The utility model belongs to the technical field of catalytic cracking oil slurry solid catalyst removal, and discloses electrostatic adsorption separation equipment which comprises a separator body, a raw material inlet, a purified raw material outlet, a high-voltage electricity inlet, a backwashing solvent outlet, a plurality of groups of backwashing solvent inlets and a hand hole, a transformer is also arranged at the top of the separator body close to the high-voltage lead-in port, and extends into the high-voltage lead-in port through a high-voltage flexible connector to be connected with the electrode; the electrode is hung on the electrode beam; a plurality of groups of filler supporting plates and backwashing devices are arranged in an array manner in the direction perpendicular to the length direction of the separator body; the backwashing device is connected with the backwashing solvent inlet; the electrode extends from the topmost filler support plate to the bottommost filler support plate. According to different heights and cleaning requirements of the electrostatic separator, the arrangement of the packed bed layers in the electrostatic separator is realized by adopting a mode of multiple layers of packing support plates and multiple layers of backwashing pipes, fluidization cleaning is realized, and the cleaning efficiency and effect are improved.

The utility model discloses a carbon dioxide recycling device with a catalytic function, which particularly relates to the field of carbon dioxide recycling and comprises a plurality of modules: a carbon dioxide capturing module is used for reducing carbon dioxide into carbonate or other chemicals through electrochemical reaction; the pretreatment module further improves the trapping efficiency through gas cooling and condensation separation; the catalytic reaction module utilizes various catalysts to realize efficient conversion; the reactant supply module ensures stable supply of reactants; the reaction product separation module is combined with centrifugation, membrane separation, adsorption, heat exchange and electrostatic separation technologies to ensure high purity and quality of products; the energy supply module provides energy required by operation of the device; and the automatic control module monitors and adjusts reaction parameters in real time. According to the device, all the steps are accurately controlled and optimized, efficient capture, treatment and recycling of carbon dioxide are achieved, and the purposes of resource recycling and environmental protection are achieved.

The invention discloses an anti-impact filter box material based on recycled ABS (Acrylonitrile Butadiene Styrene) and a preparation method of the anti-impact filter box material, and belongs to the technical field of recycled ABS materials. The preparation method of the impact-resistant poison filtering box material based on the recycled ABS comprises the following steps: step 1, sorting, cleaning, drying, crushing and separating recycled waste safety helmets and other waste protective articles containing ABS parts, then performing density separation to obtain pure ABS fragments, crushing, washing, performing centrifugal dewatering, and performing electrostatic separation to obtain a recycled ABS base material; and 2, mixing the recycled ABS base material, the composite corrosion-resistant agent and the modified impact-resistant agent, then adding an antioxidant and a lubricant, uniformly mixing, melting, filtering, extruding, drying, carrying out injection molding, shaping and passivating to obtain the impact-resistant poison filter box material based on recycled ABS. The material prepared by the method has excellent corrosion resistance, impact resistance and thermal stability.

This invention relates to the field of water treatment technology, and in particular to an interface-enhanced water treatment device that combines gas-liquid jetting and photocatalysis. The device includes a reaction tank and a sealing cover plate arranged on the reaction tank. The reaction tank and the sealing cover plate enclose a reaction zone. An installation cavity is provided within the sealing cover plate, and several coaxial corona jetting units and a photocatalytic light source unit are integrated within the installation cavity. The coaxial corona jetting units spray a gas-liquid mixture carrying space charge onto the liquid surface in the reaction zone below. The photocatalytic light source unit provides light radiation to the liquid surface in the reaction zone below. By forcibly delivering space charge to the liquid surface through the coaxial corona jetting units, a non-Laplace high-intensity electric field is established at the gas-liquid interface, breaking through the "Laplace bottleneck" of traditional gas-gap electrostatic separation and significantly improving the coalescence efficiency of tiny emulsified oil droplets.

The circuit board separation equipment with the dust removal function comprises electrostatic separation equipment and a bucket elevator, a sealing frame is arranged on the outer surface of the bucket elevator, the output end of the bucket elevator is located in the electrostatic separation equipment, a maintenance groove is formed in one side of the sealing frame, and the maintenance groove is connected with a sliding assembly; the sealing frame is arranged at the top of the bucket elevator, so that dust generated in the conveying process is blocked in the circuit board conveying process, the dust collector is fixedly connected to the top of the sealing frame, dust generated in the conveying process is removed, and when the bucket elevator breaks down in the using process, the dust collector is fixedly connected to the top of the sealing frame. The outer sliding plate and the inner sliding plate can slide, so that an opening is formed in the fault position of the maintenance groove, other parts are sealed, the fault position of the bucket elevator is maintained under the condition that sealing of the sealing frame is not affected, and certain practicability is achieved.

The invention relates to a film impurity electrostatic separation device and method based on double-roller current feedback, and belongs to the technical field of agricultural machinery. The device comprises a collecting device, a crushing device and an electrostatic separation device, wherein the electrostatic separation device adopts a grid type outer roller and a columnar inner roller structure which are coaxially arranged; the grid-type outer roller is grounded, driven by a driving mechanism to rotate and connected with a negative high-voltage power supply to charge the surface of the grid-type outer roller; and a current sensor is connected in series on the supporting shaft of the columnar inner roller and is electrically connected with the central controller. The cylindrical inner roller can be connected with a positive high-voltage power supply to form an adsorption electric field. And the central controller adjusts the output voltage of the high-voltage power supply or the rotating speed of the grid type outer roller in real time according to the electrostatic micro-current change detected by the current sensor. When it is detected that the impurity proportion in the working gap is increased, the controller automatically increases the output voltage and / or reduces the rotating speed of the outer roller so as to adapt to different material states, and the separation purity and the operation stability are improved. Real-time monitoring and self-adaptive regulation and control in the membrane impurity separation process are achieved, and the problems that a traditional fixed parameter separation device is poor in working condition adaptability and prone to blockage are effectively solved.

An electrostatic sorting device (500) charges mixed resin pieces (100) of a plurality of kinds, carries the charged resin pieces (100a, 100b) to an electrostatic field space, makes them fall while being displaced within the electrostatic field space, and sorts the resin pieces (100a, 100b), wherein an automatic charge amount measuring system (7) that measures the charge amount of the resin pieces (100a, 100b) is provided, and the automatic charge amount measuring system (7) picks up a part of the resin pieces (100a, 100b) at the time of the carrying, and measures the charge amount of the picked-up resin pieces (100a, 100b).

The invention provides a method for reducing the content of silicon powder on the surface of granular silicon, and aims to solve the problems of low removal efficiency, serious environmental pollution, high production cost and possible damage to the granular silicon in the prior art. The method comprises the following steps: firstly, pre-treating granular silicon, and regulating the airflow rate (0.5-2.0 m / s), the temperature (20-40 DEG C) and the humidity (30-60%) to enable the surface of the granular silicon to be uniformly electrified and enhance the electrostatic separation effect of silicon powder; then, the particle silicon is placed in electrostatic dust collection equipment, a 10-30 kV high-voltage electric field is applied, and silicon powder is desorbed under the action of the electric field and adsorbed by an electrode; and finally, the desorbed silicon powder is guided to enter a dust collecting device (a cyclone separator, a bag-type dust collector and the like) through air flow (0.5-1.0 m / s), so that secondary pollution of the silicon powder is avoided. According to the method, the silicon powder on the surface of the particle silicon is removed through electrostatic adsorption, chemical reagents are not needed, damage to the particle silicon is avoided, environmental pollution is reduced, the removal efficiency is improved, and the method can be widely applied to preparation and optimization of high-purity silicon materials.

The invention relates to the technical field of mineral processing, and provides a synergistic enrichment method for associated niobium, tantalum, tin and rare earth in pegmatite type spodumene ore, which comprises the following steps: crushing pegmatite type spodumene raw ore associated with niobium, tantalum, tin and rare earth to obtain crushed minerals; the crushed minerals are ground, and ground ore pulp is obtained; pulp mixing is conducted on the ore grinding pulp, and to-be-separated ore pulp is obtained; the to-be-separated ore pulp is subjected to gravity separation, and gravity concentrate and final tailings are obtained; the gravity concentrate is subjected to strong magnetic separation, and niobium tantalum-tin-rare earth concentrate and magnetic separation tailings are obtained; the niobium-tantalum-tin-rare earth concentrate is subjected to electric separation, and iron-tin-containing concentrate and electric separation tailings are obtained; and the electric separation tailings are subjected to flotation separation, and rare earth concentrate and niobium-tantalum concentrate are obtained. According to the collaborative enrichment method, efficient recovery of niobium and tantalum can be achieved, efficient enrichment of tin and rare earth can be achieved, and therefore the utilization rate of niobium, tantalum, tin and rare earth in ore can be greatly increased.