603 results about "Metal impurities" patented technology

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 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 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 the technical field of waste resourceful treatment, in particular to a sponge titanium weight bottom skin crushing and impurity removing method which comprises the following steps of peeling, bottom skin brake cutting, water jet cutting and crushing, acid leaching and impurity removing, ultrasonic cleaning, argon drying and screening and recycling. The bottom skin is crushed into small-granularity particles by adopting a cross grid water jet cutting technology, metal impurities such as Fe and Ni are removed in combination with acid leaching treatment, residual impurities are removed through multi-stage ultrasonic cleaning, oxidation discoloration is avoided through argon atmosphere drying, and meanwhile water jet sand is recycled; in the process, key indexes such as brake cutting pressure, cutting parameters, acid leaching time and ultrasonic frequency are accurately controlled through a quantification formula. The method effectively solves the problems that equipment is easy to damage during crushing and impurities are difficult to remove in a traditional process, remarkably improves the grade of bottom leather materials, widens the downstream application range, improves the resource utilization rate and economic benefits, and is suitable for industrial batch production.

The invention provides a treatment method for recovering high-purity graphite from black powder leaching residues. The treatment method comprises the following steps: removing impurity elements in graphite from the black powder leaching residues in a Joule heat flash evaporation manner; the black powder leaching residues obtained after impurity removal are put into a ball mill, liquid phenolic resin is added, full mixing is conducted, and ball milling is conducted; and putting the ball-milled mixture into flash evaporation Joule thermal equipment, and carbonizing and graphitizing the phenolic resin to obtain regenerated graphite. According to the method, the temperature of the black powder leaching residues can be increased within an extremely short time, metal impurities in the black powder leaching residues are gasified, and impurities in graphite are removed. Phenolic resin is used for carbonization and graphitization, generated disordered carbon can fill up particle cracks in waste graphite and internal lattice defects, a conductive network among graphite particles is established, a compact carbon layer is formed on the surface of graphite, and graphite structure transformation can also be induced in the step. The regenerated graphite obtained by the method is similar to commercial graphite in capacity and good in cycling stability.

The invention discloses a rinsing process for deep cleaning of purified natural quartz, which comprises the following steps: putting acid-washed quartz sand into a cleaning medium tank containing a mixed cleaning solution of deionized water and absolute ethyl alcohol for cleaning, and applying ultrasonic waves in the cleaning process; the cleaned quartz sand is put into a cleaning medium tank containing a mixed cleaning solution composed of deionized water, hydrogen peroxide and hydrofluoric acid to be cleaned, and ultrasonic waves are applied in the cleaning process; and the cleaned quartz sand is put into a cleaning medium tank containing deionized water to be rinsed so as to remove acid pickling residues to achieve deep cleaning, and ultrasonic waves are applied in the cleaning process. According to the method, a three-step cleaning scheme is innovatively adopted, so that loose impurities on the surfaces of quartz sand particles and organic reagent residues of a flotation process are efficiently stripped; the three steps are clear in function and have a synergistic effect, and the cleaning effect is far better than that of traditional single washing.

The invention relates to the technical field of semiconductor materials, in particular to a method for preparing a semiconductor material from high-purity quartz sand. The method comprises the following steps: firstly, grafting and modifying the surface of quartz sand through 3-aminopropyltriethoxysilane, complexing metal impurities by using amino functional groups, and improving the purity of a precursor from the source; secondly, hydrogen / deuterium gas pulse back-and-forth switching is adopted, surface hydrogen atom dynamics is regulated and controlled through the isotope effect, and an etching-nucleation synergistic window is created; and finally, through sequential alternate supply of silane and disilane, time separation of a weak bond etching period and a high-activity nucleation period is realized. The prepared semiconductor material shows excellent performance, and compared with a traditional method, the technical problem of low-temperature deposition of a high-quality semiconductor film is solved through full-process optimization from a material source to a deposition end.

The invention relates to the technical field, in particular to a plastic storage box blank forming machine which comprises a feeding box shell, a storage tank, a screening bin and a hot drying bin are sequentially arranged in the feeding box shell from top to bottom, conveying belts are symmetrically arranged in the screening bin, and shape follow-up electromagnets are arranged in the conveying belts; the shape follow-up electromagnet is used for adsorbing metal impurities in the raw materials to realize screening; porous ventilation hoods communicating with the hot drying bin are symmetrically arranged at the bottom of the feeding box shell, an extrusion barrel communicating with the hot drying bin is fixedly connected to one side of the feeding box shell, and an extrusion auger is rotationally connected to the interior of the extrusion barrel. The controller is combined with detection data of the first temperature sensor and the second temperature sensor, and the heating power of the electric heater and the output power of the fan are dynamically regulated and controlled, so that when the extrusion rate needs to be increased during production of a large-specification storage box, the hot air temperature and air volume are automatically increased, and the situation that raw materials are insufficiently dried due to the fact that feeding speed is increased is avoided.

A production process of electronic grade molybdenum dichloride dioxide comprises the following steps: S1, pretreatment: contacting molybdenum trioxide with a dilute acid solution at a low temperature for pickling to remove alkaline impurities and soluble metal impurities adsorbed on the surface, and drying for later use after washing; s2, wet synthesis: in an inert gas atmosphere, reacting the molybdenum trioxide subjected to acid pickling in the step S1 with concentrated hydrochloric acid of which the mass is 4-5 times of that of the molybdenum trioxide at 80-100 DEG C, and after the reaction is finished, evaporating and concentrating in a high-temperature chlorine atmosphere to generate a crude product of dichloromolybdenum dioxide; s3, primary sublimation purification; s4, complexing and decomplexing purification; and S5, secondary sublimation purification: using a quartz sublimation tower to carry out vacuum sublimation on the secondary decomplexed molybdenum dichloride obtained in the step S34, and collecting sublimation condensate to obtain the electronic grade molybdenum dichloride. The final product purity of the production process is greater than or equal to 6N, and the process can be used for large-scale production.

The invention discloses a self-healing high-temperature anti-oxidation carbon-ceramic composite material, belongs to the technical field of ceramic-based composite materials, and particularly relates to a method for introducing a self-healing metal-element-free high-temperature anti-oxidation ceramic matrix into a carbon fiber preform. Then introducing a resin carbon matrix and a self-healing inorganic filler through two times of vacuum impregnation and high-temperature cracking, and finally preparing the SiC matrix by adopting high-temperature siliconizing. The carbon-ceramic composite material prepared by the invention does not contain metal impurities, has a self-healing function, and has a long-life anti-oxidation function in a range of 700-1000 DEG C.

The invention provides an impurity and oil removal method for a laterite-nickel ore hydrometallurgy filter stick. The impurity and oil removal method comprises the following steps: dynamically cleaning a to-be-treated filter stick by adopting a first cleaning solution so as to remove oil stains on the surface of the filter stick; the first cleaning solution comprises an alkaline reagent and a surfactant; dynamically cleaning the oil-removed filter stick by adopting a second cleaning solution so as to remove metal impurities on the surface of the filter stick; the second cleaning solution comprises an acidic reagent and fluoride. According to the method, a step-by-step strategy of oil removal and impurity removal is adopted, the alkaline reagent and the surfactant cooperate with each other, oil stains on the surface of the filter stick can be efficiently stripped, and a channel is opened for subsequent impurity removal; the acidic reagent and the fluoride cooperate with each other, nickel, cobalt, lead and other impurities on the surface of the filter stick can be efficiently removed, fluorine ions and the metal ions can form a water-soluble complex, the problem of impurity metal residues is thoroughly solved, and deep regeneration of the filter stick is achieved. The strategy is excellent in oil and impurity removal effect and regeneration performance.

The invention provides a preparation method and application of a modified PVC adsorbent for gold extraction of carbonaceous gold ore, and belongs to the technical field of organic polymer materials and resource utilization. Based on construction of a hydroxylation-xanthate esterification reaction and bifunctional adsorption sites, a series of chemical modification paths of acetate nucleophilic substitution-hydrolysis-carbon disulfide alkali treatment are established, and xanthate functional groups with high reaction activity are accurately constructed on an inert PVC framework. Sulfur atoms in xanthate groups of the modified PVC are excellent electron donors and can generate strong chemical adsorption with metal impurities or polar sites on the surface of carbon, meanwhile, Van der Waals interaction between a main chain of the modified PVC and the carbon is reserved, and unmodified PVC or single hydroxylated PVC does not have the synergism of chemical adsorption and physical adsorption, so that the modified PVC can be used for preparing the carbon-modified PVC composite material, and the carbon-modified PVC composite material can be used for preparing the carbon-modified PVC composite material. And leap-type improvement of the adsorption capacity and selectivity of organic carbonaceous in minerals is realized.

The utility model discloses a waste paperboard crushing and stirring device which comprises a machine body, a stirring device, a stirring device, a stirring device and a stirring device. The top of the machine body is provided with a feeding port, and the bottom of the machine body is provided with a discharging port; the crushing mechanism is arranged in the machine body, the crushing mechanism is located below the feeding opening, and the crushing mechanism is used for crushing waste paperboards; the eddy current separation mechanism is arranged below the crushing mechanism, and the eddy current separation mechanism is used for separating metal on the waste paperboards; and the stirring magnetic attraction mechanism is located below the eddy current separation mechanism, and the stirring magnetic attraction mechanism is used for stirring the crushed waste paperboards and removing iron metal on the waste paperboards, so that efficient crushing of the waste paperboards and thorough removal of metal impurities are achieved.

The utility model discloses a high-purity quartz sand screening device applied to a photovoltaic power generation system. The high-purity quartz sand screening device comprises a feeding bin cover, a vibrating screen and a discharging bin which are sequentially arranged from top to bottom. A feeding opening is formed in the feeding bin cover; a feeding hole I is formed in the top of the vibrating screen; a coarse material discharging hole and a fine material discharging hole are formed in the side wall of the vibrating screen; a feed port II is formed in the top of the discharge bin, a discharge port is formed in the bottom of the discharge bin, and a fine material discharge port of the vibrating screen is connected with the feed port II of the discharge bin; the hot air supply pipes are fixed on the inner wall of the bottom of the discharging bin, and a plurality of air holes are formed in the hot air supply pipes; the exhaust unit comprises an upper exhaust pipe and a lower exhaust pipe; the vibrating screen of the screening device can achieve particle size grading of quartz sand, the hot gas supply pipe in the discharging bin sprays high-temperature gas such as argon, metal impurities such as Fe, Al and hydroxyl-OH adsorbed on the surface of the quartz sand in the falling process of the quartz sand are removed, the purity of the quartz sand is remarkably improved, and the photovoltaic high-purity quartz sand screening device meets the strict requirements of photovoltaic high-purity quartz sand.

This utility model relates to the field of crushing device technology, specifically disclosing a crushing device for recovering coated sand, including a base, a crushing cylinder fixedly installed on the top of the base, a feeding channel fixedly connected to the top of the crushing cylinder, a rotating rod rotatably arranged inside the crushing cylinder, a uniformly distributed and symmetrically arranged cutting blade fixedly installed on the rotating rod, an arc-shaped filter plate arranged on the bottom surface of the crushing cylinder, a conveying channel fixedly connected to the bottom surface of the crushing cylinder at a point on the arc-shaped filter plate, a bottom cylinder fixedly connected to the bottom of the conveying channel, a movable disc rotatably arranged inside the bottom cylinder, a rotating rod 2 arranged inside the bottom cylinder, the rotating rod 2 arranged on the movable disc, a distributed and symmetrically arranged movable column fixedly installed on the rotating rod 2, and a magnetic column arranged inside the movable column. This crushing device for recovering coated sand can directly adsorb metal impurities in the crushed coated sand, improving the purity of the recovered coated sand and having strong practicality.

The utility model relates to the technical field of engine oil filters, and discloses a long-life engine oil filter which comprises a shell mechanism, a sealing cover mechanism is fixedly arranged on the upper end face of the shell mechanism, a first clamping mechanism is fixedly arranged on the lower end face of the sealing cover mechanism, and a filter cartridge mechanism is fixedly arranged on the lower end face of the first clamping mechanism. A second clamping mechanism is fixedly arranged on the lower end surface of the filter cartridge mechanism, and filter paper is clamped between the first clamping mechanism and the second clamping mechanism. According to the filter, the upper end and the lower end of the filter paper can be clamped and fixed in the clamping grooves and are adhered by using an adhesive, so that the adhesion strength of the filter paper can be greatly improved, and the service life of the filter is prolonged; and the magnetic attraction block can attract and collect metal impurities in unfiltered engine oil into the storage groove to prevent the metal impurities from scouring the filter paper to cause breakage of the filter paper, so that the filtering efficiency of the filter is improved.

The application discloses a kind of feed dynamic regulation methods of synthesizing trichlorosilane, through multispectral synergistic detection, through the accurate calculation of key parameters such as hydroxyl inhibition factor, amorphous phase activity gain and metal impurity inhibition factor, the activity condition of silicon powder in fluidized bed can be accurately and real-time reflected, the technical bottleneck that silicon powder activity cannot be monitored on line is broken through, and then in industrial production, for the proportion of fluidized bed feed etc. Real-time regulation provides control basis.Through feed dynamic regulation mechanism, silicon powder feed rate, H2 / SiCl4 ratio and catalyst addition amount can be optimized in real time, ensure that silicon powder is always in high activity state, promote the reaction to proceed, improve trichlorosilane yield and purity, solve the problem that traditional fixed regulation mode and silicon powder dynamic activity do not match, and then improve regulation accuracy.

The application relates to the technical field of cylinder cooler screening, in particular to a screening device on a cylinder cooler, which comprises a first fixing frame, the upper surface of the first fixing frame is symmetrically fixedly connected with supporting pieces, the upper surfaces of the supporting pieces are all annularly rotationally connected with rolling pieces, the outer surfaces of the rolling pieces are rotationally connected with cooler bodies, the outer surfaces of one end of the cooler bodies are fixedly connected with driving gear rings, one end of the cooler bodies is through-connection with a feeding port, the end, away from the feeding port, of the cooler body is slidably connected with a closing piece, the inner side of the closing piece is rotationally connected with a rotating frame, the surface of the rotating frame is symmetrically equidistantly rotationally connected with a plurality of electromagnets, when materials are cooled in the cooler bodies, the metal impurities in the materials can be adsorbed by the electromagnets, so that the unnecessary components in the materials can be removed, the purity of the materials is improved, and the metal impurities in the materials can avoid causing abrasion of production equipment in the next process.

The invention discloses a low-energy-consumption crystallization purification method of high-purity molten salt-grade potassium nitrate, and belongs to the technical field of purification of inorganic chemical materials. The method comprises the steps of raw material pretreatment directional impurity removal, multi-stage gradient crystallization, mother liquor graded circulation and low-temperature drying, in the raw material pretreatment stage, impurity concentration online detection and dynamic pH regulation are combined, a chelating agent, an oxidizing agent and an adsorption flocculant are added step by step, precise directional removal of metal impurities and suspended solids is achieved, and the product purity is improved; a multi-stage gradient crystallization process combining gradient temperature control and sectional controllable cooling is adopted, and the crystallization efficiency is improved in cooperation with a crystal form regulating agent; a mother liquor graded circulation and drying waste heat recovery system is matched, so that the mother liquor utilization rate is increased, and the production energy consumption is reduced.

The application discloses a sorting device for geopolymer recycled concrete production and a working method thereof. The sorting device comprises a main body, a feeding cavity is formed in the upper end of the inside of the main body, a sorting chamber is formed below the feeding cavity and is communicated with the feeding cavity, a PLC controller is mounted on one side of the front end of the main body, rotating doors are movably mounted on the two sides and the front and back ends of the main body, a rotating shaft is rotatably arranged in the inside of the feeding cavity, spiral conveying blades are welded to the outer wall of the rotating shaft, a threaded transmission rod is rotatably arranged on one side of the upper end of the inside of the sorting chamber, and a moving block is threadedly connected to the outer part of the threaded transmission rod. The sorting device can avoid the influence of metal impurities on subsequent sorting, improve the sorting effect, make the metal impurities enter the inside of a second collecting frame, facilitate a user to collect and take out the metal impurities, and can inhale generated dust to avoid the diffusion of the dust, thus being good in practicability.

The present invention relates to a method, for detecting metal foreign matters in an electrode active material, including a first step of forming a metal foreign matter extraction solution by mixing an electrode active material and a nitric acid aqueous solution, a second step of obtaining a precipitate by selectively precipitating a metal foreign matter in the metal foreign matter extraction solution, and a third step of measuring a content of the metal foreign matters in the precipitate.

This invention relates to the field of fine chemical technology, specifically disclosing a production process for electronic-grade diethyl carbonate. The method includes the following steps: ethylene carbonate and anhydrous ethanol undergo a transesterification reaction in a microwave reactor catalyzed by a composite catalyst; the reaction solution is then subjected to phase separation treatment, followed by a continuous separation process coupling atmospheric and vacuum distillation to obtain an intermediate; further purification is achieved by molecular sieve adsorption to remove metal impurities and moisture, combined with precision filtration using a polytetrafluoroethylene membrane. The composite catalyst significantly improves the transesterification reaction efficiency and product selectivity. This process, through the synergistic effect of reaction process enhancement and multi-stage purification technology, achieves highly efficient removal of moisture, metal impurities, and nanoscale particles from the reaction system. The resulting electronic-grade diethyl carbonate meets the stringent requirements of high-end electronic chemicals such as lithium battery electrolytes, and possesses technical advantages such as short reaction cycle, thorough impurity removal, and high product purity.

The utility model discloses a magnetic oil filter which comprises a shell, a filter cover mechanism forming an assembly type cover body structure, a pre-screening mechanism used for pre-screening magnetic oil and a filter element mechanism used for forming a double-filtering structure, and the upper end of the shell is provided with an opening structure. The filter cover mechanism is assembled at an opening in the upper end of the shell, the pre-screening mechanism is arranged on the inner side of the filter cover mechanism, and the filter element mechanism is arranged in the shell. The filter is convenient to disassemble, assemble and maintain while the filter element is replaced, the pre-screening mechanism is arranged, metal impurities in oil entering the filter can be preliminarily pre-screened, abrasion and blockage of the filter element caused by accumulation of the metal impurities are avoided, the service life of the filter element is prolonged, and the service cycle of the filter element is prolonged; the magnetic oil can be doubly filtered, the impurity removal rate is high, and the filtering effect is good.

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carrier and active metal, the carrier is an aluminum oxide core wrapped by a carbon shell, the active metal is Mo and Ni, and on the basis of the weight of the catalyst, the content of MoO3 is 7.5 wt%-15.5 wt%, the content of NiO is 1.5 wt%-4.5 wt%, the content of carbon is 20 wt%-45 wt%, and the content of aluminum oxide is 35 wt%-70 wt%; and the ratio delta 1 of the content of the active metal in the shell layer to the content of the active metal in the core layer is 0.25: 1-0.75: 1. The preparation method comprises the following steps: (1) preparing active metal modified flour; (2) preparing active metal modified pseudo-boehmite microspheres; and (3) rolling the active metal modified flour and the active metal modified pseudo-boehmite microspheres for molding, then carrying out heat treatment, drying and roasting to obtain the hydrogenation catalyst. The catalyst disclosed by the invention has relatively high metal impurity capacity and relatively high Ca, Fe, Ni and V removal capacity, and is suitable for being used as a hydrogenation protection catalyst and a hydrodemetallization catalyst in a residual oil hydrogenation process.

The invention provides a recovery treatment method of fluoride slag in uranium hexafluoride preparation, belongs to the technical field of nuclear industry waste slag treatment, and solves the technical problems that a product obtained by an existing fluoride slag treatment method is high in metal impurity content and low in uranium recovery rate, secondary fluoride slag is easily generated, and the product cannot be returned to a uranium purification and conversion production line for reuse. The method comprises the following steps: at the temperature of 400-600 DEG C, contacting the fluorinated slag with excessive water vapor to carry out high-temperature hydrolysis reaction, so that UF4 and uranium intermediate fluoride in the fluorinated slag generate uranium oxides U3O8 and UO3 with the fluorine ion content of less than 1mg / g, and filtering to obtain uranium oxides; mixing uranium oxide with a nitric acid solution, dissolving and reacting to obtain a uranyl nitrate solution; the pH of the uranyl nitrate solution is adjusted to 3-4, hydrogen peroxide is added for a precipitation reaction, solid-liquid separation is conducted, and uranium peroxide solid precipitates are obtained. The method is high in uranium recovery rate, low in product impurity content and capable of returning to a uranium purification and conversion production line for reuse.

The invention belongs to the technical field of infrared focal plane sensor manufacturing, and particularly relates to a vanadium oxide etching post-processing method based on VHF wetting driving. Comprising the following steps: performing graded vacuumizing and temperature programming pretreatment on a wafer subjected to vanadium oxide etching, and continuously introducing VHF moistening mixed gas consisting of anhydrous hydrogen fluoride, ethanol steam and inert carrier gas into a treatment cavity; by accurately regulating and controlling the temperature and pressure of the cavity, anhydrous hydrogen fluoride is promoted to be subjected to a selective fluorination reaction with photoresist decomposition products and metal impurities left after etching to generate gaseous products, and ethanol steam synchronously exerts the dual effects of moistening, corrosion prevention and water molecule desorption promotion. According to the method, a gas phase processing mode is adopted in the whole process, liquid intervention is avoided, the problems of vanadium oxide pixel adhesion and film corrosion can be effectively solved, meanwhile, residual impurities are thoroughly removed, the electrical property stability of the vanadium oxide film is guaranteed, the yield and detection precision of the infrared focal plane sensor are remarkably improved, and the method has good industrial application prospects.

The utility model provides a reprocessed plastic processing and conveying device, which relates to the technical field of processing and conveying and comprises a cabinet body, and the surface of the cabinet body is provided with a placing groove and an air outlet; and the screening and conveying device is arranged on the surface of the cabinet body and used for impurity removal and conveying of the regenerated plastic. According to the screening device, impurities and metal impurities with large sizes can be screened out through the screening frame and the magnetic bar respectively, the fan blade body is driven by the servo motor to blow air, light impurities can be removed in cooperation with the inclined plate and the guide plate, and the impurities can be removed through cooperation of the spiral conveying rod and the screening drum. According to the recycled plastic screening device, impurities with the size smaller than that of recycled plastic are screened out while the recycled plastic is conveyed, the falling small impurities and light impurities are collected through the material collecting box and the material receiving box correspondingly, effective screening and impurity removal of the recycled plastic are achieved, and the quality of the recycled plastic in subsequent machining is improved.

The utility model discloses a recovery device for precoated sand production, which comprises a recovery frame, the inner bottom wall of the recovery frame is fixedly connected with a hydraulic rod, one end of the hydraulic rod is fixedly connected with a fixing frame, the inner wall of the fixing frame is fixedly connected with a second screening frame, and the bottom of the second screening frame is provided with screening holes. And a screen is arranged on the inner wall of the screen hole. The device solves the problem that a current recovery device for precoated sand production is inconvenient to screen metal objects, and is provided with a recovery frame, a movable rod, a movable block, a belt pulley, a lead screw, a belt, a first screening frame, a movable hole, a magnet, an adsorption plate and an adsorption rod; according to the precoated sand recycling device, metal impurities in waste materials can be adsorbed and collected, the metal impurities and other impurity waste materials are prevented from being screened out together, and therefore the recycling effect of effective resources is improved, and meanwhile the recycling efficiency of precoated sand is further improved.

The utility model relates to a cat litter production system and harmful metal impurity removal equipment thereof. The harmful metal impurity removal equipment comprises a box-shaped main body, a feeding and paving device arranged in the box-shaped main body and at least one group of conveying and separating components, the conveying and separating assembly comprises a belt transmission mechanism and a separating guide plate. The belt transmission mechanism is composed of a strong magnetic roller, a non-magnetic roller and a horizontal conveying belt. The feeding and paving device is arranged below the feeding hole and is used for uniformly paving raw materials on the horizontal conveying belt; the strong magnetic roller is located at the discharging end of the horizontal conveying belt and used for adsorbing harmful metal impurities in the raw materials. The separation guide plate comprises a front guide plate and a rear guide plate which are arranged in an inverted V shape, the tip ends of the front guide plate and the rear guide plate are located below the axis of the strong magnetic roller and are adjacent to the horizontal conveying belt, the front guide plate guides harmless materials to the next production process or the next horizontal conveying belt to be continuously sorted, and the rear guide plate guides harmful metal impurities to the waste hopper. Therefore, harmful metal impurities are separated out.