44results about "Arsenic compounds" patented technology

The invention discloses equipment and a method for preparing a glass clarifying agent from arsenic trioxide, and belongs to the field of glass clarifying agents. A device for preparing a glass clarifying agent through arsenic trioxide comprises a supporting ring frame, a feeding assembly is fixedly installed on one side of the upper portion of the supporting ring frame, a motor is fixedly installed in the middle of the supporting ring frame, a linkage transmission assembly is installed on the lower portion of the supporting ring frame, and a stirring paddle used for ore dosing treatment is fixedly installed on the lower portion of the linkage transmission assembly. The stirring paddle comprises a second branch stirring paddle, the second branch stirring paddle comprises a stirring shaft used for conveying materials, a sliding plate is installed in the stirring shaft in a sliding mode through a spring, and a dredging rod used for dredging the stirring shaft is fixedly connected to the outer portion of the sliding plate; the sliding plate in the stirring shaft is matched with the dredging rod, self-inspection dredging is achieved through centrifugal force, and the blocking problem caused by accumulation of sediments such as sulfate and calcium sulfate is solved.

The invention discloses a method and a device for deeply purifying an arsenic solution and preparing high-purity arsenic oxide. The method comprises the following steps: oxidizing antimony impurities in an arsenic solution, precipitating, deeply removing, adding a reducing agent to reduce pentavalent arsenic in the solution into trivalent arsenic, decomposing, evaporating, cooling and crystallizing to obtain the high-purity arsenic trioxide. Wherein oxidation precipitation is carried out in a purification tank, reduction is carried out in a reduction tank, the purification tank and the reduction tank are located in the same box body and are separated by a filter screen and a partition plate in the middle, precipitated arsenic antimonate generated after purification in the purification tank is intercepted through the filter screen, and filtrate enters the reduction tank; during reaction, the partition plate is started for use to prevent the solution from flowing. The filtrate enters a reduction tank, reducing agents such as sulfur dioxide are introduced, pentavalent arsenic in the solution is further reduced to form trivalent arsenic, and a high-purity arsenic trioxide product (As2O3 is larger than or equal to 99.5%, and Sb is smaller than or equal to 0.05%) is prepared.

The utility model relates to an arsenic sulfide slag treatment system which comprises an oxygen pressure leaching unit, a first solid-liquid separation unit, a first reaction unit, a second solid-liquid separation unit, a second reaction unit and a third solid-liquid separation unit which are communicated in sequence, a discharge hole of the third solid-liquid separation unit is communicated with the first reaction unit. According to the treatment system disclosed by the utility model, the arsenic sulfide slag can be treated in a more efficient and energy-saving manner, and harmless and resourceful treatment of the arsenic sulfide slag is realized.

The application provides a preparation method and device of high-purity zinc arsenide by multiphase reduction-melt alloying, and belongs to the technical field of inorganic compound synthesis. The method uses arsenic trichloride as an arsenic source, volatilizes the arsenic trichloride by precise temperature control, and transports AsCl3 vapor to a reactor containing high-purity liquid zinc by using high-purity inert gas as a carrier gas; at a set reaction temperature, the liquid zinc reduces the AsCl3 gas phase to generate elemental arsenic, and the elemental arsenic immediately reacts with zinc to generate zinc arsenide Zn3As2 in situ; the by-product zinc chloride ZnCl2 escapes in a gaseous form and is collected by a condensation system, and the zinc arsenide is suspended on the surface of the zinc melt due to the lower density than the liquid zinc, so that continuous or batch separation and collection can be realized. The application has the advantages of simple process, high reaction efficiency and high product purity, avoids problems such as uneven components and introduction of impurities in the traditional solid-phase reaction method, and is suitable for large-scale production of semiconductor-grade zinc arsenide materials.

A method of preparing a Group III-V nanocrystalline composition, the method comprising forming a first mixture comprising a first indium-containing compound and / or a first gallium-containing compound, a first ligand, and a first solvent, adding to the first mixture at least one compound comprising a nitrogen group element, heating the first mixture to a growth temperature in the range of 200 DEG C to 350 DEG C; and adding an oxide remover and a composition comprising Group III-V clusters to the first mixture at a growth temperature for a total growth time of at least 6 hours to provide the Group III-V nanocrystalline composition. The invention also provides cubic octahedral III-V group nanocrystals, which can be formed by the method of the invention.

The present invention relates to aliovalently substituted argyrodite-type solid electrolyte solid electrolytes. These solid electrolytes display and increased ionic conductivity.

The invention discloses a sulfur-arsenic-strontium-sodium compound and a sulfur-arsenic-strontium-sodium nonlinear optical crystal as well as a preparation method and application thereof. The chemical formula of the sulfur-arsenic-strontium-sodium nonlinear optical crystal is Na4SrAs2S8, the sulfur-arsenic-strontium-sodium nonlinear optical crystal is of a non-centrosymmetric structure and belongs to a tetragonal system, and a space group is that cell parameters are alpha = beta = gamma = 90 degrees, Z = 2 and V = 701.57 (5). The sulfur-arsenic-strontium-sodium nonlinear optical crystal provided by the invention has a relatively large nonlinear optical coefficient and relatively wide transmission wave band and band gap. Meanwhile, the crystal meets the same-component melting characteristic, is easy to grow, cut, grind, polish and preserve, is stable in air, is not easy to deliquesce and is insoluble in water, so that the crystal is expected to become a new-generation novel middle-infrared band nonlinear optical material with excellent comprehensive performance, and can be effectively applied to a wide-spectrum-range tunable laser system.

The invention discloses a method and device for preparing high-purity antimony trioxide, according to the preparation method of the high-purity antimony trioxide, a micro-nano bubble multi-blowing method is combined with a graded filtration method, the arsenic content can be reduced to 0.1 ppm or below through treatment of conventional reagents such as hydrogen sulfide and ammonia water, and the method has extremely high impurity removal and purification efficiency; the high-purity antimony trioxide can be efficiently obtained, and a new choice is provided for industrial application.

The invention relates to the technical field of wet-process phosphoric acid purification, and discloses a method for separating and utilizing arsenic in wet-process phosphoric acid, which comprises the following steps of: clarifying wet-process phosphoric acid, and feeding supernate into an arsenic removal reaction tank; preparing an induced crystallization agent and a dearsenification agent, firstly adding the induced crystallization agent into the reaction tank, and then adding the dearsenification agent for reaction to obtain dearsenification phosphoric acid A; then heating and dissolving the phosphoric acid C, and cooling and growing crystals to obtain arsenic-removed phosphoric acid C; filtering to obtain arsenic-removed phosphoric acid and arsenic sulfide precipitate; washing and drying the precipitate to obtain an arsenic sulfide product; according to the method, the induced crystallization agent is combined with the dissolution-recrystallization process, so that separated arsenic sulfide is attached to the induced crystallization agent and grows into large-particle precipitates easy to filter, selective separation of arsenic is realized, and generation of arsenic-containing waste residues is avoided; and meanwhile, the separated arsenic is directly converted into a high-purity arsenic sulfide product, so that resource utilization of the arsenic is realized.

The invention discloses a thiobacillus ferrooxidans domestication strategy which is more efficient compared with an existing strategy, and a novel acidophilic thiobacillus ferrooxidans Dom-BY3 (Acidithiobacillus ferrooxidans Dom-BY3) with the preservation number of CCTCC (China Center for Type Culture Collection) NO: M 20242585 is obtained through domestication and separation of the strategy. Compared with found acidophilic thiobacillus ferrooxidans, the expression level of realgar leaching related genes of the strain is remarkably improved, higher realgar leaching efficiency is achieved, and the leaching effect result is stable. The concentration of arsenic ions and the concentration of iron ions in a realgar microbiological leaching solution obtained by leaching realgar with the acidithiobacillus ferrooxidans Dom-BY3 are higher. In the aspect of drug effect, the realgar microbiological leaching solution not only has an obvious inhibition effect on HePG2 hepatoma cell lines and K562 leukemia cell lines, but also has a poison effect on rat myocardial cells H9C2 weaker than that of realgar microbiological leaching solutions obtained by leaching disclosed strains.

The present invention provides a method for preparing a metal arsenide and its application; the method for preparing the metal arsenide includes: performing a melting reaction on metal arsenic and an active metal in an environment with a vacuum degree of 0.001~1 Pa and a temperature of 750~950 °C to obtain a reaction product; cooling the reaction product to room temperature and pulverizing it under the protection of an inert gas to obtain the metal arsenide. The present invention effectively utilizes metal arsenic resources, significantly reduces arsenic emissions in the industrial process, and promotes environmental protection; by converting low-value metal arsenic and active metals into high-value metal arsenide products, it has a wide range of applications in semiconductor materials and electronic special gases; under vacuum conditions, the present invention significantly reduces the reaction temperature by lowering the triple point of arsenic and active metal reactants, improves the reaction rate, and at the same time, the reaction conditions are easy to control and the operation is simple, thereby reducing the overall preparation cost.

The invention provides a comprehensive recovery method for valuable metals in smelting waste acid, and relates to the technical field of hydrometallurgy. The method comprises the steps that smelting waste acid is heated and then mixed with a sulfur-containing substance, a sulfur-containing compound is introduced, copper and rhenium in the smelting waste acid are selectively separated, and copper-rich rhenium slag and liquid obtained after copper and rhenium precipitation are obtained; the copper-rich rhenium slag is leached, and a leaching solution is obtained; and extracting the leachate to obtain a loaded organic phase and raffinate, carrying out reverse extraction on the loaded organic phase to obtain ammonium rhenate, and carrying out evaporative crystallization on the raffinate to obtain copper sulfate. Compared with the prior art, the precipitation rate of rhenium can be improved, selective separation of copper, rhenium and arsenic in the waste acid is achieved, the production cost of enterprises is reduced, and the economic benefits of the enterprises are improved.

The utility model discloses an efficient arsenic trichloride reduction device, which belongs to the technical field of reduction reaction and comprises a reaction kettle, a gas uniformizing device is mounted in the reaction kettle and comprises a mounting rack, a motor is fixedly mounted at the top of the mounting rack, an output shaft of the motor is connected with an outer gear, and the outer gear is connected with an inner gear. The outer wall of the outer gear is meshed with a gear ring; according to the gas uniformizing device, a motor drives a gear ring to rotate through a gear, so that the gear ring drives a rotating pipe to rotate on the outer wall of an external pipe, a transmission pipe drives a dispersing box to rotate, the dispersing box drives a connecting box to rotate, and then the connecting box drives a spray head to rotate; the nozzle drives the introduced hydrogen to move to form a relatively small gas mass, and the rising speed of the relatively small gas mass is slower than that of a relatively large gas mass, so that the hydrogen is uniformly dispersed in the arsenic trichloride and is fully contacted and reacted with the arsenic trichloride, and the reaction efficiency is improved.

This invention relates to the field of lithium salt synthesis technology for lithium-ion battery electrolytes, specifically a method for synthesizing lithium hexafluoroarsenate. This method uses 40% hydrofluoric acid as the reaction medium, replacing high-cost anhydrous hydrofluoric acid, and adds 0.5-5 wt% fluoride catalyst. It employs a segmented temperature control mode of mixing at -40 to -30°C, aeration at 20 to 30°C, and heat preservation at 40 to 50°C. Combined with a reactor with a built-in annular baffle plate to improve mixing efficiency, the highly toxic exhaust gas is treated by a three-stage tail gas absorption system of anhydrous calcium chloride-20% sodium hydroxide solution-activated carbon. Simultaneously, it achieves resource recovery of fluoride-containing wastewater through lime slurry pretreatment-sulfuric acid regeneration and hydrofluoric acid recycling. This invention features a safe process operation, reduces costs by more than 30%, produces a product purity ≥99.9%, a yield ≥92%, achieves a fluoride resource recovery rate of ≥85% in wastewater, and meets national standards for tail gas emissions. It realizes efficient and green synthesis of lithium hexafluoroarsenate and is suitable for industrial production.

The invention relates to a gradient treatment and multi-metal collaborative recovery process for micro-fine particle coated sulfur concentrate. The gradient treatment and multi-metal collaborative recovery process comprises the following steps: (1) carrying out acidic complexing reinforced desilicication pretreatment; (2) two-stage temperature-controlled and atmosphere-controlled roasting: vulcanizing and volatilizing in a first-stage low-temperature reducing atmosphere to remove arsenic, and pore-forming and desulfurizing in a second-stage medium-temperature oxidizing atmosphere; (3) selectively extracting copper by reducing ammonia leaching; and (4) gold and silver are leached in a non-cyanide mode. According to the cascade treatment and multi-metal collaborative recovery process, a complete technical chain from'blocking secondary wrapping from the source 'to'recycling arsenic and sulfur in the process' to'multi-metal cascade recovery 'is constructed, the gold recovery rate and the silver recovery rate are stabilized to be 90% or above and 80% or above respectively, the copper recovery rate reaches 88% or above, and the iron ore concentrate grade is gt; arsenic is smaller than or equal to 0.10%, sulfur is smaller than or equal to 1.0%, and the resource recovery rate gt of arsenic and sulfur is achieved; the comprehensive utilization rate of resources is increased by more than 35%, and comprehensive breakthrough in four dimensions of recovery rate of valuable elements in the sulfur concentrate difficult to treat, product quality, environmental protection benefit and economical efficiency is realized.

The utility model relates to the technical field of high-purity arsenic preparation, and provides a high-purity arsenic sublimation device which comprises a sublimation barrel, a barrel cover, a crucible, a collecting cover and a negative pressure machine, the crucible is arranged at the inner bottom of the sublimation barrel, and a heating sleeve is arranged on the outer wall of the crucible; a threaded bottom is arranged on the lower wall of the barrel cover, a sealing brim is fixedly connected to the outer wall of the sublimation barrel, and the threaded bottom is in threaded connection to the inner wall of the sealing brim; a mounting table is arranged on the inner wall of the sublimation barrel, the collecting cover is arranged above the mounting table, and a spiral pipeline is arranged in the collecting cover. By arranging the collecting cover and the conveying pipe, when arsenic is sublimated, sublimated impurities can be discharged firstly, the phenomenon that when arsenic steam is condensed, the impurities and the arsenic steam are condensed at the same time due to the fact that too many impurities are contained in the barrel, and the purity is reduced is avoided, the crucible is directly heated by the heating sleeve through the semi-embedded arrangement of the communicating pipe crucible, and therefore the purity of the arsenic is improved. And the influence on equipment is avoided.

The present invention provides a method for producing a group lll-V nanocrystal composition, the method comprising forming a first mixture comprising a first indium-containing compound and / or a first gallium-containing compound, a first ligand and a first solvent, adding at least one pnictogen-containing compound to the first mixture, and heating the first mixture to a growth temperature in the range of 200 °C to 350 °C; and adding an oxide removal reagent and a composition comprising group lll-V clusters to the first mixture at the growth temperature over a total growth time of at least 6 hours to provide the group lll-V nanocrystal composition. The present invention also provides cuboctahedral group lll-V nanocrystals, which may be formed by the method of the invention.

The present invention relates to a detection device for detecting a fire-like phenomenon occurring in a space loaded with or through which a medium flows, comprising a detector comprising a radiation-sensitive detector material which is designed to detect radiation emitted by the fire-like phenomenon. With regard to interference sources, the proposed detection device has improved properties.

The present application relates to copper electrolyte purification waste gas treatment technical field, especially to a kind of high-efficiency environmental protection removal method of arsine in copper electrodeposition tank surface waste gas.The method adds a certain concentration of waste electrolyte into flue gas spray liquor according to certain proportion, promotes arsine in copper electrodeposition tank surface waste gas and copper sulfate in spray liquor to react in spray tower, then the reaction product is clarified and separated in clarifier.Supernatant flows into clean water pool, after supplementing a certain amount of waste electrolyte, sulfuric acid and water, it is pumped into spray tower for recycling.The method effectively utilizes copper element in waste electrolyte, efficiently removes and recycles most of arsine in copper electrodeposition tank surface waste gas, and resources it as a semiconductor material, which not only solves the pollution of arsine to the environment, reduces the environmental protection risk of enterprise, but also greatly improves the economic and environmental protection benefit of enterprise.

A method of producing a group III-V nanocrystal composition comprising: (a) forming a mixture of a indium and / or gallium containing compound, a ligand and a non-polar solvent; (b) adding at least one

The utility model relates to a kind of dechlorination device for high-purity arsenic production, including main body mechanism, adsorption mechanism, heat dissipation mechanism, material receiving mechanism, the adsorption mechanism is located inside main body mechanism, the heat dissipation mechanism is located main body mechanism side, the material receiving mechanism is located main body mechanism side, the utility model passes through feed pipe and adds chlorine-containing impurity arsenic raw material to adsorption tank by motor driving heating disc rotation uses centrifugal force and evenly disperses to heating disc on raw material, raw material is heated to 620 DEG C to 650 DEG C by heating disc, ensure that chlorine-containing impurity arsenic raw material completely sublimes, avoid liquid residue, after sublimation, arsenic steam is adsorbed in raw material by five layer MOFs adsorption layer in adsorption tank, after adsorption, arsenic steam is entered into material receiving tank by steam pipeline, while steam pipeline is equipped with condenser pipeline, and arsenic steam is cooled, temperature 100 DEG C to 150 DEG C is condensed as solid high-purity arsenic.

The invention discloses a resourceful treatment method for smelting ash leached liquid. The leached liquid is subjected to multi-stage filtering purification, the purified filtrate is separated through a diffusion dialyzer, and waste acid and recycled acid are produced; carrying out vulcanization reaction on the obtained recycled acid, adding carbide slag into the acid wastewater obtained after the reaction for neutralization and dehydration to obtain an industrial byproduct gypsum, carrying out advanced treatment on the wastewater obtained after separation, and discharging the produced recycled water up to the standard or recycling the recycled water to each production water point; adding nano-iron and ozone into the produced waste acid, and reacting under micro-positive pressure to generate precipitate; the method comprises the following steps: filtering arsenic-precipitated liquid, carrying out sulfuration reaction on the arsenic-precipitated liquid, carrying out solid-liquid separation after the reaction, returning the produced sulfuration slag ingredients to a furnace to recover valuable metals such as zinc and cadmium, adding carbide slag into the filtrate obtained by separation, neutralizing and dehydrating to obtain an industrial byproduct gypsum, carrying out advanced treatment on the obtained sewage, and discharging the produced reuse water up to standard or recycling the reuse water for each production water point. By means of the method, resourceful treatment can be carried out on the smelting ash leached liquid, and the environment-friendly treatment concept of recycling non-ferrous metal and arsenic resources is embodied.

This invention discloses a method for the harmless resource utilization of zinc oxide leaching residue. First, the zinc oxide leaching residue undergoes low-temperature arsenic removal to obtain white arsenic and arsenic-removed leaching residue. Then, the arsenic-removed leaching residue is subjected to low-acid washing to remove cadmium, yielding a cadmium solution and cadmium-removed leaching residue. The cadmium solution is then subjected to a zinc powder displacement reaction to obtain sponge cadmium. The cadmium-removed leaching residue is subjected to sulfidation-grinding treatment for extraction of valuable components (zinc and lead). Chemical flotation yields lead-zinc concentrate (containing arsenic and cadmium) and tailings (containing arsenic and cadmium). The lead-zinc concentrate and tailings are then subjected to low-temperature arsenic removal to obtain white arsenic, arsenic-removed lead-zinc concentrate, and arsenic-removed tailings. The arsenic-removed lead-zinc concentrate and tailings are then subjected to low-acid washing to remove cadmium, yielding a cadmium solution, cadmium-removed lead-zinc concentrate, and cadmium-removed tailings (harmless tailings). The cadmium solution is then subjected to a zinc powder displacement reaction to obtain sponge cadmium. Ultimately, this method achieves effective lead and zinc recovery and harmless tailings disposal.

The invention belongs to the technical field of metallurgy, and discloses a method for efficiently recovering multiple elements in smelting smoke dust. The method comprises the following steps that S1, smoke dust is leached through sulfuric acid and hydrogen peroxide, zinc, copper and arsenic enter a solution, and lead, gold and silver are left in slag; s2, activated arsenic sulfide is added into the pickle liquor, copper is selectively precipitated to obtain copper sulfide slag, and meanwhile arsenic is further enriched in the solution to obtain arsenic-rich liquor; and S3, the acid leaching residues, the copper sulfide residues and the arsenic-rich liquid are treated correspondingly, and lead, gold, silver, copper, arsenic trioxide and zinc sulfate are recycled. According to the method, efficient separation and full-quantification recovery of multiple metals are achieved, especially harmful arsenic is converted into valuable products, the technological process is clean and environmentally friendly, the resource utilization rate is high, and economic benefits and environmental benefits are remarkable.

According to the technical scheme, the high-purity arsenic synthesis device comprises a temperature rising box, a synthesis tank and a heating box, the synthesis tank is installed at the top in the temperature rising box, an oil storage chamber is arranged on one side in the heating box, a circulating pump is installed at the bottom in the heating box, and the input end of the circulating pump is connected to the interior of the oil storage chamber through an oil pumping pipe; an output shaft of the circulating pump is connected into the heating box through an oil inlet pipe, a backflow pipe is installed close to the top of the heating box, the tail end of the backflow pipe is connected to the top in the oil storage chamber, and a heater is installed at the bottom in the oil storage chamber. The high-purity arsenic synthesis device solves the problems that an existing heating structure of an arsenic synthesis raw material cannot uniformly heat the arsenic synthesis raw material, the heating uniformity of the arsenic synthesis raw material is poor, the reaction uniformity of the arsenic synthesis raw material is poor, and the synthesis purity of arsenic is affected, the reaction uniformity of the arsenic synthesis raw material is improved, and the yield of the arsenic synthesis raw material is improved. Therefore, the synthesis purity of arsenic is ensured.

This invention relates to the field of lithium salt synthesis technology, specifically to a green synthesis process and purification method for high-purity lithium hexafluoroarsenate. The invention uses low-toxicity lithium arsenate as the arsenic source and employs a dual-functional system of a composite reducing agent and fluorine source to achieve in-situ reduction and coordination synthesis simultaneously. It also utilizes directional coordination-impurity masking coupling technology to control impurity generation at the source. After pre-purification, the synthesis solution undergoes a supercritical CO2 extraction-membrane separation coupling purification process, combined with low-temperature gradient crystallization to obtain high-purity lithium hexafluoroarsenate product. This invention avoids the generation of highly toxic intermediate products throughout the process, has a short process route, mild reaction conditions, closed-loop recovery of raw materials and solvents, low emissions of waste, and high product purity. The content of moisture, free acid, and metal impurities is far below battery-grade standards, making it suitable for large-scale industrial production.

The present invention relates to the field of comprehensive recycling and utilization of metal resources, and specifically discloses a comprehensive treatment method for copper-arsenic-rich solid waste. The method comprises: adding the copper-arsenic-rich solid waste and a leaching agent to a reactor for leaching to obtain a leachate at a leaching temperature of 110-150°C for a leaching time of 1-3 hours, using black acid as the leaching agent; filtering the leachate using a first filter press to obtain a filtrate; adding the filtrate to a heat exchanger to preheat the leaching agent; adding an iron extractant to an extraction and iron removal unit to extract and remove iron from the filtrate; adding a copper extractant to an extraction and copper removal unit to remove copper from the iron-extracted residual solution; adding the copper-extracted residual solution to a reduction and arsenic precipitation unit, and then performing a filter press to obtain As2O3. This method extracts iron and copper separately, and standard cathode copper can be obtained by subsequent copper stripping. It can achieve the coordinated treatment of black acid, arsenic-copper slag, and high-arsenic smoke, achieving efficient separation and recycling of copper and arsenic, with a short process and high efficiency.

The invention discloses a sulfur-silver-based compound, a sulfur-silver-based nonlinear optical crystal and a preparation method and application of the sulfur-silver-based nonlinear optical crystal. The chemical formula of the nonlinear optical crystal is A1Ag2AsS4 or A2Ag2PS4, A1 is K or Rb, and A2 is Na, K or Rb. The nonlinear optical crystal provided by the invention has a relatively large nonlinear optical coefficient and relatively wide transmission wave band and band gap. Meanwhile, the nonlinear optical crystal has the same-component melting characteristic, is easy to grow, cut, grind, polish and preserve, is stable in air, is not easy to deliquesce, is insoluble in water, and is expected to become a new-generation novel middle-infrared band nonlinear optical material with excellent comprehensive performance.

The utility model belongs to the field of semiconductor material manufacturing, and particularly relates to an arsenic hydride and phosphine adsorption tower, which comprises a tower body and a circulation port at the bottom of the tower body, a sealing box is mounted at the bottom of the tower body, the sealing box is hermetically connected with the circulation port through a filter cartridge, a cleaning groove is mounted in the sealing box, and a push block is mounted at the output end of the cleaning groove; an annular powerful magnet is installed on the push block, a synchronous sleeve is installed on the outer side of the filter cylinder in a sliding mode, an iron sheet is installed in the synchronous sleeve, and the iron sheet and the powerful magnet are attracted. According to the spraying circulating system, manganese crystals are prevented from entering the spraying circulating system in the mode that the filter cylinder is additionally arranged on the circulating opening, the cleaning groove is started to push the powerful magnet to slide in the filter cylinder, the powerful magnet on the push block can attract the powerful magnet in the synchronous sleeve, the push block can drive the synchronous sleeve to move synchronously, and therefore the manganese crystals are prevented from entering the spraying circulating system. And the synchronous sleeve moves to clean manganese crystals blocked on the outer wall of the filter cartridge, so that the circulating efficiency of the spraying liquid is improved.

The invention discloses a CoAs3 catalyst and a preparation method and application thereof, and the method comprises the following steps: firstly, mixing Co powder and As powder, and grinding; and then under the protection of inert atmosphere, carrying out heat treatment on the ground mixture to prepare the CoAs3 catalyst, the temperature in the heat treatment process is 750-850 DEG C, and the time is 40-60 hours. The preparation method of the CoAs3 catalyst is simple, easy to operate and low in cost, and the technical problem that in the prior art, topological semimetal photocatalytic hydrogen production performance is poor is effectively solved.