1603 results about "Metal impurities" patented technology

The invention discloses a method and a device for modifying and recycling waste plastics. The method comprises the following steps: carrying out multi-band electromagnetic resonance sorting on plastic fragments, distinguishing plastic types through an intelligent recognition algorithm, and synchronously adopting high-frequency eddy current sorting to remove metal impurities, so as to obtain classified plastic fragments; then supercritical fluid treatment is conducted, impurities are removed through a pressure oscillation system, obtained purified plastic fragments, a chain extender and nanofiller are jointly fed into solid-state shearing equipment, a molecular chain repairing reaction is triggered through a temperature control system, then the purified plastic fragments are injected into an intelligent forming system, and technological parameters are dynamically adjusted based on real-time monitoring data; forming a microstructure self-repairing replica through gradient cooling to obtain a regenerated plastic product, and embedding a traceable chip into the regenerated plastic product; impurity separation efficiency is improved through electromagnetic-vortex synergistic separation, microporous pollutants are deeply removed through supercritical fluid treatment, aged molecular chains are effectively repaired through a solid-state shearing chain extension technology, the microstructure of a product is optimized, and the strength and quality of the regenerated plastic product are improved.

The invention relates to the technical field of plastic recycling, in particular to a waste plastic crushing and sorting device and an automatic metal impurity rejecting method.The waste plastic crushing and sorting device comprises a rack, a primary separation assembly and a two-part assembly, and the primary separation assembly comprises a crushing mechanism arranged on the rack, a flattening mechanism arranged on the crushing mechanism and a conveying and sorting mechanism arranged on a sorting mounting box; the two-part assembly comprises a crushing mechanism arranged on the sorting mounting box and a vibration screening mechanism arranged on the rack and located below the crushing mechanism, through the arrangement of the crushing mechanism and the conveying sorting mechanism, metal is adsorbed to a conveying belt after waste plastic is crushed, and through the arrangement of a power supply component, when a conductive rod slides to an insulating rod, the metal is separated from the insulating rod; the metal automatically falls into the crushing mechanism, plastic remaining on the metal is further crushed, the plastic and the metal are separated more thoroughly, plastic crushing and metal separation are conducted synchronously, the plastic crushing and separating efficiency is improved, and the labor intensity of workers is reduced.

The invention discloses a peanut oil impurity detection method based on image recognition analysis, and relates to the technical field of computer vision, and the peanut oil impurity detection method comprises the following steps: carrying out impurity targeted marking on an oil sample; adopting dual-wavelength laser to excite the oil sample subjected to impurity target marking, synchronously acquiring a fluorescence image, and marking the coordinates of a suspicious composite impurity region by utilizing an FRET fluorescence intensity ratio; metal impurities and fiber impurities are distinguished according to the plasma formant position, and nanoscale impurity morphology data are formed; detecting unmarked transparent nanoparticles, triggering surface acoustic wave assisted detection, and outputting impurity motion feature codes; inputting the FRET fluorescence intensity ratio, the nanoscale impurity morphology data and the impurity motion trail features into a graph neural network classifier based on an attention mechanism, and performing joint interpretation on impurity types; and sorting and filling the oil sample according to an impurity classification result. The comprehensive performance of impurity detection is remarkably improved through a multi-mode sensing cooperation mechanism.

The invention discloses a new energy battery insulation protection UV adhesive tape and a preparation method thereof, and belongs to the technical field of battery UV adhesive tape processing, and the preparation method comprises the following steps: mixing matrix resin, a modified polymeric monomer, a composite filler, tackifying resin, an ultraviolet delayed curing agent, a photobase generator, a photoinitiator, an antioxidant and a solvent, and stirring to obtain UV glue; coating the UV glue on the surface of the base material blue film, drying to obtain an adhesive layer, and adhering a release film on the surface of the adhesive layer to obtain the UV adhesive tape. The soybean protein isolate is complexed with iron, chromium, calcium, magnesium, sodium and other metal impurities in the montmorillonite to avoid falling; the UV adhesive tape comprises a photobase generator, a photoinitiator and an ultraviolet light delay curing agent which are cooperatively used, the UV glue is initiated to be preliminarily cured and then attached to the surface of the battery, the fixing effect is achieved within 1-2 h, and the problems that the curing speed of the UV adhesive tape is high, the curing of the UV adhesive tape on the battery is not uniform, the operable time is short, and the quality of the battery is affected are avoided.

The invention relates to the technical field of hafnium tetrachloride preparation, in particular to a process method for preparing low-niobium-content hafnium tetrachloride based on a hydrogen reduction method, which comprises the following steps: S1, raw material processing, S2, chlorination and impurity removal, S3, purification, S4, refining and S5, material receiving. According to the method, metal impurities in the hafnium-containing raw stone are removed step by step through the working procedures of raw material processing, chlorination and impurity removal, purification, refining and material receiving, high-purity hafnium tetrachloride with the low niobium content is obtained, in the refining working procedure, under the assistance of the supported catalyst, the metal niobium impurities are removed through a hydrogen reduction method, the removal rate is effectively increased, and the production cost is reduced. And moreover, the process flow is simplified, the energy consumption is reduced, and the method meets the environmental protection requirement.

The invention relates to the technical field of injection molding waste plastic recovery, in particular to injection molding equipment and a process for producing plastic automobile ornaments. The equipment comprises an injection machine and an online recycling mechanism, the injection machine is provided with a double-channel solution cavity composed of a new material main runner and a waste material returning cavity, and the tail ends of the two channels converge in a 30-degree Y shape; the on-line recovery mechanism comprises a waste conveyor belt, a crushing mechanism and a transmission device, a magnetic separation impurity removal device is arranged in the crushing mechanism, and a discharge end is connected with the batching mechanism. Through double channels and a Y-shaped confluence structure, production waste is subjected to online recovery and crushing and then is fused, mixed and reused with new materials, the waste utilization rate is increased, and the cost is reduced. The magnetic separation and impurity removal device efficiently removes metal impurities through the movement of inclined avoiding, rotary impurity scraping and inclined discharging of a scraping plate; the batching mechanism removes dust to prevent impurities from affecting melt performance. The crushing device adapts to different waste materials, airflow assists discharging to improve the efficiency, and the green production concept is met.

The invention discloses a waste rubber sealing element recovery treatment all-in-one machine, and relates to the technical field of waste recovery, the waste rubber sealing element recovery treatment all-in-one machine comprises a treatment box, the outer wall of the front side of the treatment box is fixedly connected with a feeding hopper, the inner wall of the treatment box is fixedly connected with a sieve plate, and the outer wall of the front side of the treatment box is provided with a discharge port corresponding to the sieve plate. When the rubber sealing element is processed, the first driving motor drives the roller to rotate, rubber particles are screened through the screen holes, the particles meeting the size are thrown out, the particles which do not meet the standard are taken back through the blocking plate to be smashed again, the particle size uniformity is ensured, meanwhile, the knocking block is matched with the triggering rod, the sealing element accurately falls onto the smashing roller, deviation is avoided, and the screen holes are prevented from being blocked. And in addition, an inner gear ring and a third gear synchronously drive a rotating rod to rotate, a power-on guide column is matched with a magnetic attraction ring, the magnetic attraction ring moves in a reciprocating mode to attract metal impurities, the impurities fly into a magnetic collecting barrel after power failure, and the impurity removal efficiency and the rubber recovery purity and quality are improved.

The invention discloses a method for preparing activated carbon by using waste tire pyrolytic carbon black, which comprises the following steps of: selectively and dynamically screening and removing magnetic impurities, namely dynamically screening a pyrolytic product through an airflow grading device, separating out high-purity carbon black particles with the particle size of less than 10 microns, and removing metal impurities and residual steel wires by using a magnetic separation technology to obtain the activated carbon. And the purity of the carbon black reaches 95% or above. Therefore, the pore structure is optimized through combination of a wet method and high-temperature activation, the pore distribution is further maintained, regulated and controlled through freeze drying and solvent heat treatment, the specific surface area of the finally prepared activated carbon reaches 1500-2000 m < 2 > / g, and the pore volume retention rate reaches 90% or above; the technology not only effectively solves the problems of insufficient carbon black purity, unstable pore structure and high energy consumption in the prior art, but also remarkably improves the adsorption performance and chemical stability, so that the carbon black is widely applied to the fields of water treatment, gas adsorption, catalyst carriers and the like, and has the outstanding advantages of high efficiency, low consumption and environmental protection.

The invention discloses a processing method for reducing the broken rice rate of commercial rice, which comprises the following steps: S1, an unhulled rice pretreatment stage: S1a, a multi-stage linkage impurity removal process is adopted, and large impurities, light impurities, metal impurities and stones in unhulled rice are removed through combination of classified screening, airflow separation, magnetic separation and specific gravity stone removal, so that the impurity removal rate is greater than or equal to 99%; s1b, on the basis of a dynamic adaptation model of rice physical characteristics and rice hulling parameters, rice moisture and hardness data are collected in real time through a first detection device, the rice hulling flow and the inter-roller pressure are calculated and adjusted through a control unit, and closed-loop control is achieved; s2, carrying out a color sorting and polishing stage; s3, carrying out a rice milling regulation and control stage; and S4, entering a vacuum packaging stage.

The invention discloses a method for synthesizing electronic-grade ethyl acetate through catalytic esterification of acidic ion exchange resin, and belongs to the technical field of ethyl acetate preparation. The method comprises the following steps: mixing crosslinked polystyrene white balls and a swelling agent, and dropwise adding concentrated sulfuric acid for reaction to obtain S-PS resin; mixing an EDTA disodium salt saturated solution and a polyacrylic acid solution, adding a cross-linking agent and an emulsifier, and carrying out a cross-linking curing reaction to obtain EDTA microcapsules; the preparation method comprises the following steps: dispersing S-PS resin in a solvent, adding EDTA microcapsules, a dehydration condensation agent and a catalyst, reacting under the protection of inert gas, and filtering and recovering after the reaction is finished to obtain S-PS-EDTA resin; mixing glacial acetic acid, absolute ethyl alcohol and S-PS (at) EDTA resin for reaction, and filtering and collecting liquid after the reaction is finished; and rectifying the collected liquid to obtain the product. According to the method provided by the invention, metal impurities can be chelated in the synthesis process, and the electronic-grade ethyl acetate with high purity and low impurity content is produced.

The utility model belongs to the technical field of quartz sand production magnetic separation, and particularly relates to a magnetic separation device for quartz sand production, which comprises a lower bracket for fixing a quartz sand magnetic separation component, an upper bracket fixed on the lower bracket, a power component arranged on the upper bracket, and a cleaning component arranged at the bottom of the lower bracket, a plurality of overturning assemblies are arranged on the lower support, an L-shaped sliding block is pushed to move downwards on a sliding rod under the acting force of a spring, then an overturning inclined plate is attached to the magnetic separation conveying belt, a gear motor drives a driving gear to rotate, and at the moment, a driven gear drives a driving roller to rotate; due to the fact that the magnetic separation conveying belt is arranged between the driving roller and the driven roller, the magnetic separation conveying belt is driven to convey quartz sand at the moment, when the quartz sand is conveyed to the overturning inclined plate, the quartz sand is overturned to the magnetic separation conveying belt from the overturning inclined plate to be flatly laid, and the situation that the quartz sand is accumulated and metal impurities cannot be adsorbed by the magnetic separation conveying belt is prevented; and the magnetic separation effect is poor.

The bearing retainer magnetic polishing device comprises a magnetic polishing machine and a material overturning frame located at the front end of the magnetic polishing machine, a collecting groove is formed in the right side of the material overturning frame, and a cellular bearing frame is connected to the material overturning frame through a material overturning mechanism; the material turning mechanism comprises a driving air cylinder, a sliding table, a material turning rod, an arc-shaped top shell, a material turning guide groove and a circular sliding block, an equal dividing mechanism is arranged in the cellular bearing frame and comprises a set of transverse fixing plates and a plurality of vertical adjusting plates, and a collecting box is placed in the collecting groove. The bearing retainer magnetic polishing device has the beneficial effects that the bearing retainers needing magnetic polishing are placed in the lattices, the bearing retainers can be prevented from being collided and damaged in the magnetic polishing process, the latticed bearing frames can be adjusted according to the sizes of the bearing retainers, the overturning mechanism can drive the latticed bearing frames to automatically overturn and discharge, and the bearing retainers are prevented from being damaged. And in cooperation with a collecting box in the collecting groove, metal impurities attached to the surface of the bearing retainer can be washed conveniently, and the magnetic needles can be collected conveniently.

The invention discloses a scrap aluminum classification and rapid identification method, and relates to the field of scrap aluminum classification and rapid identification, the method comprises the following steps: S1, grading pretreatment: to-be-sorted scrap aluminum is conveyed into a three-layer vibrating screen machine through a conveying belt for grading screening, and different sizes of scrap aluminum are sorted out; and S2, impurity separation is conducted, specifically, the classified scrap aluminum is conveyed into a drum-type magnetic separator, magnetic impurities are removed, then the scrap aluminum subjected to magnetic separation is conveyed to an airflow separator, light non-metal impurities are separated, then the scrap aluminum is conveyed to an objective table through a conveying belt, full-process automatic treatment is conducted, manual dependence is reduced, the production efficiency is improved, and the production cost is reduced. A single production line can reduce the workload of sorting workers; and compared with manual sorting, due to the fact that classification is accurate, the rejection rate of the regenerated aluminum alloy can be effectively reduced, and economic benefits are remarkably improved.

The invention relates to a hollow silicon dioxide microsphere and a preparation method and application thereof, the hollow silicon dioxide microsphere has a dielectric constant less than or equal to 2.5, a dielectric loss tangent angle less than or equal to 0.001, a purity greater than 95%, a sphericity rate greater than or equal to 99%, a wall thickness greater than 0 and less than or equal to 0.42 [mu] m, and an average diameter of 0.1 [mu] m-5 [mu] m, and the hollow rate, the wall thickness and the average particle size satisfy a relational expression, eta is the hollow rate, t is the wall thickness, and R is 1 / 2 of the average particle size. The hollow silicon dioxide microspheres provided by the invention are high in spherical rate, firm in wall thickness, uniform in particle size distribution, high in purity, relatively excellent in dielectric property and extremely low in content of metal impurities, and can meet the application requirements of high-speed and high-frequency substrates, in addition, the preparation method provided by the invention is few in adopted raw materials, simple in preparation process, low in cost and high in efficiency.

The invention provides special-shaped copper pipe machining equipment for a copper-aluminum composite bar and a machining method of the special-shaped copper pipe machining equipment, and relates to the technical field of copper pipe rolling machining. The special-shaped copper pipe machining equipment for the copper-aluminum composite bar comprises a machine tool, and a rolling device, a driving device, a flame jetting device and a straightening device are arranged on the upper surface of the machine tool. According to the special-shaped copper pipe processing equipment for the copper-aluminum composite bar, the fire spraying assembly is arranged in the copper pipe for continuous heating to prevent temperature loss, and the lining assembly is matched to abut against the heated inner wall, so that the problem that uncontrollable pits, protrusions and falling metal impurities are generated on the inner wall in the rolling process due to the fact that the inner wall of the copper pipe is lack of supporting is solved; and the problem of slipping or rigid fracture in the compression process due to temperature loss when the steel sheet enters a medium-temperature brittle zone is prevented.

The invention belongs to the technical field of aluminum alloy die-casting devices, and particularly relates to an aluminum alloy die-casting device and a forming process thereof.The aluminum alloy die-casting device comprises a device body, a die-casting die, a spraying part used for spraying a release agent and an electric push rod used for controlling the spraying part to move, and further comprises a circulating assembly arranged at the top end of the device body; the collecting box is arranged under the spraying part, a separating plate is arranged in the collecting box, a containing groove is formed in the separating plate, and a push plate is installed at the top end of the separating plate in a sliding mode and used for pushing residual metal impurities at the top end of the separating plate into the containing groove. And a storage box is arranged on the separation plate, a conveying assembly is arranged in the storage groove and used for conveying metal impurities falling into the storage groove into the storage box, and through cooperative use of the structures, metal residues can be effectively recycled, and certain resources are saved.

The invention discloses an integrated reaction process for preparing potassium fluoborate through efficient conversion of fluosilicic acid, and relates to the technical field of inorganic fluorine chemical industry, and the potassium fluoborate is prepared through the technologies of complexing metal impurities through EDTA disodium, catalyzing condensation reaction through Fe-TiO2, carrying out K2CO3 / nano gamma-Al2O3 composite desilicication, deeply removing sodium through ion exchange and carrying out mother liquor closed-loop circulation. The problems of serious sodium pollution, low reaction efficiency and resource waste in the traditional process are solved. The composite desiliconization agent improves the desiliconization rate to 96%, the reaction time is shortened by 40% through nanometer catalysis, the mother liquor recycling rate is 80%, and the silicon slag is converted into high-added-value nanometer white carbon black. The product purity is greater than or equal to 99.5%, the sodium residue is less than or equal to 0.003%, and the method is suitable for industrial production of electronic-grade potassium fluoborate.

The invention relates to the technical field of sodium battery material preparation, in particular to a preparation method of a sodium battery hard carbon material. The method comprises the following steps: raw material treatment: moso bamboo or shell biomass is subjected to bubble crushing treatment to obtain raw material particles, the crushing air pressure is 0.5-3 MPa, and the raw material particles are crushed until the particle size is 50-200 [mu] m; pre-carbonization: carrying out stepped heating on the raw material particles under a protective atmosphere; carrying out heat preservation for 0.5-1 hour at an initial temperature of 200-250 DEG C, then heating to 400-600 DEG C at a speed of 5-10 DEG C / min, and carrying out heat preservation for 1-3 hours to obtain a pre-carbonized product; according to the method, the protective atmosphere is introduced at intervals by adopting a dynamic regulation and control strategy in the pre-carbonization step, so that the consumption of the protective gas is effectively reduced, meanwhile, the volatile matter content of the hearth is monitored in real time by adopting a non-contact conductivity sensor, and once the volatile matter content exceeds a preset threshold value, a shutdown signal is immediately sent to a gas tank; therefore, the residual quantity of metal impurities is effectively reduced.

The pole frame polar plate comprises the pole frame polar plate, the pole frame polar plate is a plastic pole frame polar plate, a plurality of alkali liquor inlets are formed in the bottom of the pole frame polar plate, a hydrogen outlet and an oxygen outlet are formed in the top of the pole frame polar plate, and an inner sealing face and an outer sealing face are arranged on the pole frame polar plate in the circumferential direction of the pole frame polar plate. A plurality of metal pins are arranged in the region, positioned inside the inner sealing surface, of the pole frame pole plate and are embedded into the plastic pole frame pole plate. The plastic electrode frame and the electrode plate are formed through one-time injection molding, subsequent machining and the fixing procedure of the electrode plate and the electrode frame are avoided, the leakage risk is fundamentally eliminated, the electrode frame and the electrode plate are all made of alkali-resisting materials, high in chemical corrosion resistance and free of metal impurities, the risk of electrochemical corrosion is fundamentally eradicated, and the service life of the battery is prolonged. The integrated plastic pole plate and the pole frame greatly reduce the equipment weight and size, simplify the installation, transportation and maintenance, and have obvious cost advantages; and meanwhile, metal pins are embedded in the middle of the polar plate to ensure electron transfer.

The invention relates to the technical field of wastewater treatment equipment, and particularly discloses metal impurity-containing industrial wastewater treatment equipment which comprises a main body structure, a filtering structure, a cleaning structure and a recycling structure, the filtering structure is fixedly arranged on the main body structure, the cleaning structure is fixedly arranged on the main body structure and located above the filtering structure, the filtering structure is movably sleeved with the cleaning structure, and the recycling structure is fixedly arranged on the cleaning structure; the device has targeted adsorption, improves the resource utilization rate, prevents blockage, and is convenient to clean, replace and adjust; metal objects are collected through magnetic adsorption and air suction extraction, so that the metal can be reused, accumulation of the metal objects on the first filter screen is reduced, and the risk of blockage is reduced.

The utility model discloses a waste plastic hot melting recycling regeneration device which comprises a plastic hot melting box, a heat conducting plate is installed in the plastic hot melting box, and through holes are evenly formed in the heat conducting plate. Waste plastics are smashed through the smashing box, the plastics and impurities meeting the conditions enter the mounting base, when the smashed plastics pass through the magnetic plate, the metal impurities are attracted to the outer side of the magnetic plate due to magnetic attraction, and the smashed plastics smoothly fall into the plastic hot melting box to be subjected to hot melting; when hot melting is finished and metal impurities need to be collected, a sealing mounting frame is pulled, so that the sealing mounting frame is separated from a mounting base and moved out of the plastic hot melting box, a magnetic plate and the metal impurities are taken out of the sealing mounting frame through separation of a connecting groove and a connecting block, and workers can conveniently collect the metal impurities in a centralized mode; the influence on the use performance of the regenerated plastic is avoided.

The invention discloses a crystal growth device and a crystal growth method for gallium oxide crystal downward growth, and belongs to the technical field of gallium oxide single crystal preparation. The device comprises a crucible, an upper shaft, a heating mechanism and a heat preservation mechanism, the crucible is composed of a metal layer and an isolation layer arranged on the inner side wall of the metal layer, an opening is formed in the top of the metal layer, the thermal expansion coefficient of the side, away from the metal layer, of the isolation layer ranges from 0.5 * 10 <-6 > k <-1 > to 2.5 * 10 <-6 > k <-1 >, and the thermal expansion coefficient of the isolation layer is gradually increased outwards from the side, away from the metal layer, of the isolation layer. The rising rate is 2 * 10 <-6 >-3 * 10 <-6 > k <-1 > / mm; the upper shaft is arranged above an opening of the crucible and can lift and rotate relative to the crucible, a seed crystal support is arranged below the upper shaft, a first cooling pipeline is arranged in the upper shaft, and a second cooling pipeline is arranged in the seed crystal support. The crystal growth device breaks through the limitation of a traditional Czochralski method, a casting method and a Bridgman method, realizes downward growth of crystals, and can reduce the influence of crucible metal impurities on the crystals, so that gallium oxide single crystals with high quality, large size and high yield are obtained.

The invention relates to a method for producing industrial-grade phosphoric acid from wet-process phosphoric acid raffinate acid, and belongs to the technical field of wet-process phosphoric acid. The technical problem to be solved by the invention is to provide a low-cost method for producing industrial-grade phosphoric acid from wet-process phosphoric acid raffinate. The method comprises the steps of pretreatment, metal ion extraction, pretreatment, phosphoric acid extraction, washing, phosphoric acid reverse extraction, concentration and the like, and finally industrial-grade phosphoric acid is obtained. The method adopts the raffinate acid as the raw material to prepare the industrial grade phosphoric acid, perfects and improves the wet-process phosphoric acid purification process, can utilize the original production equipment of a phosphorus purification enterprise, does not need to add new equipment, and is low in production cost. According to the method, phosphoric acid loss is avoided, all extracting agents can be recycled, associated metal elements in the raffinate acid can be recycled in a cascade classification mode, and cost is saved. The method is high in extraction efficiency, the content of metal impurity ions in the obtained product phosphoric acid is low, and the requirement of industrial grade phosphoric acid is met.

To provide: a cleaning fluid having improved removability of stains due to impurities: and a cleaning method using the cleaning fluid.SOLUTION: Provided is a cleaning fluid, comprising a solvent and a metal remover. The cleaning fluid includes two or more kinds of solvents, the distance (HSP distance) between the Hansen solubility parameter of the cleaning fluid and the Hansen solubility parameter of dimethylacetamide is 1.0 or less, and the content of metal impurities is 0.1×10-9 pts.mass or more to 102×10-6 pts.mass or less relative to 100 pts.mass in total of the solvent and the metal remover.SELECTED DRAWING: None

The invention relates to the technical field of stripping liquids, and discloses a water-based photoresist stripping liquid for the AMOLED (Active Matrix / Organic Light Emitting Diode) field, which comprises the following components in percentage by mass: 15-20% of 2, 2-dimethylolpropionic acid, 25-30% of diethylene glycol monobutyl ether, 8-10% of diethylene glycol monomethyl ether, 5-8% of diethanol amine, 1.5-3% of a metal protective agent, 0.5-1% of a surfactant and the balance of pure water. According to the stripping liquid, raw materials including 2, 2-dimethylolpropionic acid, diethylene glycol monomethyl ether and diethylene glycol monobutyl ether are subjected to double-tower distillation, metal ions are reduced to 100 ppt, the pollution possibility is eliminated, and metal impurities and granularity in the stripping liquid production process are controlled. According to the invention, the proper metal protective agent and surfactant are adopted, so that the metal silver is protected in the stripping process, the surface tension is reduced, the permeability of the solution is improved, and the problem of photoresist residue is solved.

The invention relates to an automatic package removing device, and belongs to the technical field of package detection equipment. The device comprises a horizontal conveyor belt, a metal detection unit, a weight detection unit, a correlation grating, a servo push plate mechanism and a control system, the metal detection unit detects metal impurities through a metal detector above a conveying belt, the weight detection unit obtains weight data through a weighing platform below the conveying belt, a built-in encoder of a correlation grating collects the speed of the conveying belt in real time, and the servo push plate mechanism drives a push plate through a servo motor and monitors thrust through a pressure sensor. And the control system receives the detection signal, calculates the starting delay time of the push plate based on the speed of the conveyor belt and the conveying distance, and drives the servo motor to act according to preset parameters, so that accurate removal of metal, weight and composite defective packaging materials is realized. The device is mainly used for automatically detecting and removing unqualified packages on a packaging production line, and the packaging quality control efficiency is improved.

The invention relates to the technical field of polyester fiberboard production, and provides polyester fiberboard production integrated equipment with an automatic waste recycling function, the polyester fiberboard production integrated equipment comprises a recycling box, a material guide groove and a solid-liquid separation box, a material crushing and slicing assembly and a high-pressure water washing assembly are arranged in the recycling box, and the high-pressure water washing assembly is located below the material crushing and slicing assembly; waste materials are sliced and cleaned through cooperation of the material crushing and slicing assembly and the high-pressure water washing assembly, the material guide groove is obliquely formed in the bottom of the recycling box, the material crushing and knocking assembly is arranged above the material guide groove, the electromagnet set is installed below the material guide groove, and secondary cleaning and metal impurity removal are conducted on the waste materials through cooperation of the material crushing and knocking assembly and the electromagnet set. And one end, far away from the recycling box, of the material guide groove extends into the solid-liquid separation box, and through the technical scheme, the problem that the cleaning efficiency is low when an existing polyester fiber board production device recycles and treats waste materials with more impurities and a large amount is solved.

The invention discloses a lithium ion battery self-discharge evaluation method. The method comprises the following steps: S1, manufacturing a plurality of metal impurity single batteries and a plurality of control group single batteries; s2, executing a multi-step aging process on each metal impurity single cell and a control group single cell, and checking the timeliness of metal precipitation in each aging process; obtaining the voltage drop rate of each metal impurity single cell and the control group single cell; s3, comparing the voltage drop rate of each metal impurity single cell with a reference standard of a control group; and if yes, judging the battery as a bad battery. On the basis of the characteristics of simple structure, low cost and easy operation of a single battery, in combination with accurate regulation and control of high-SOC interval charge-discharge cycle, high-temperature aging and normal-temperature aging processes and in combination with disassembly of the single battery to detect the timeliness of metal precipitation in each stage, metal impurities introduced in the production process of the lithium ion battery are fully dissolved, and the production efficiency of the lithium ion battery is improved. The problem that metal impurities are difficult to screen out is solved.

The invention relates to the technical field of pressure reducing valves, and discloses a high-pressure hydrogen pressure reducing valve and a using method thereof.The high-pressure hydrogen pressure reducing valve comprises a valve pipe assembly, the valve pipe assembly comprises a hydrogen filtering assembly, the two ends of the hydrogen filtering assembly fixedly communicate with valve shells, and the top of the hydrogen filtering assembly fixedly communicates with a gas valve assembly; one end of the hydrogen filtering assembly is fixedly sleeved with an electric heating ring sleeve, the other end of the hydrogen filtering assembly is rotationally connected with a fan wheel, the side face of the fan wheel is rotationally sleeved with a magnetic cutting element, the bottom of the fan wheel is fixedly connected with a rotating wheel, and one end of the inner side of the bottom of the valve shell fixedly communicates with a magnetic cylinder. The problem that groove-shaped erosion marks appear on the sealing face of the valve seat due to the fact that metal impurity particles in a pipeline of the pressure reducing valve impact the valve element and the valve seat along with high-speed hydrogen flow is solved, the metal impurity particles attached to the magnetic cylinder can be recycled, and the problems that resources are wasted and the surface of an outlet of a valve body is frosted when high-pressure hydrogen expands through throttling are solved.

The invention relates to the technical field of raw coal impurity removal, and particularly provides a raw coal impurity removal anti-blocking device. By arranging the feeding primary screening mechanism, coal powder is filtered out through a flow guide plate, and by arranging a first-stage material uniformizing device and a second-stage material uniformizing device, coal can be evenly dispersed, and the phenomenon that the device is blocked due to accumulation of the coal is prevented; the belt type iron removal mechanism is additionally arranged, metal impurities in raw coal are adsorbed through the magnetism of an electromagnet, and the discharging quality of coal is guaranteed; the grate type screening unit is additionally arranged, so that coal briquettes with small sizes can smoothly fall into a stock bin below through gaps between swing rods, and impurities such as stones with large sizes are temporarily intercepted on the swing rods and wait for follow-up rotary throwing treatment of the rotary roller claw type screening unit; and a rotating roller claw type screening unit is arranged, a first gear motor and a cam divider are used for providing power, a claw is intermittently driven to rotate, and large sundries can be thrown into a sundry recycling box.