22results about How to "Solve recycling difficulties" patented technology

The invention discloses preparation and application of an imido covalent organic framework material containing imidazolyl ionic liquid. The imido covalent organic framework material (ILs-TPN-COFs) containing the imidazolyl ionic liquid is obtained by connecting the imidazolyl ionic liquid [CnCmILs (at) Br] to an imido covalent organic framework TPN-COFs through a covalent bond. The material has an ionic liquid tertiary amine N active site and a halogen anion active site, and can promote CO2 activation and ring opening of epoxide. The ILs-TPN-COFs catalytic material has the advantages of uniform distribution of active sites, better stability, easiness in separation of the catalyst from a reaction system, better repeatability and the like. According to the invention, the prepared novel ILs-TPN-COFs material is applied to catalysis of synthesis of propylene carbonate from carbon dioxide and epoxypropane, and shows excellent catalytic performance under mild reaction conditions.

The present invention provides a kind of beneficiation method of low-grade spodumene ore, belongs to the field of mineral processing technology, and the method comprises the following steps: raw ore grinding, stirring and slurrying, flotation and other steps, wherein the stirring and slurrying operation uses YLH-01 as an adjusting agent, stirs under the original slurry pH condition, optimizes the rheological properties of the slurry, solves the problem that the fine mud covers the mineral surface and affects the ore sorting, and the flotation operation further improves the separation effect of spodumene and gangue minerals by the selective adsorption of collector PL2-01 on the spodumene surface, and realizes the efficient sorting of low-grade spodumene. The present invention is a new beneficiation method with good stability, good separation effect, high separation index and strong adaptability, which is suitable for promotion and application.

The invention provides a method for recovering copper from bismuth concentrate, which comprises the following steps of: adding water into initial bismuth concentrate for size mixing, not additionally adding an agent, and performing agent (sludge) removal on the initial bismuth concentrate by using agents such as a collecting agent and the like remained in front-end flotation operation and adopting a flotation method, so that residues at the bottom of a flotation tank are removed sludge; carrying out copper-bismuth separation roughing on a foam product obtained by flotation, and carrying out copper-bismuth separation fine-coarse separation on the obtained roughed concentrate to obtain fine-coarse separation concentrate and fine-coarse separation tailings; copper concentrate is obtained through two times of closed-circuit concentration of the concentrate and rough-separation concentrate, and tailings are obtained through two times of closed-circuit scavenging of the concentrate and rough-separation tailings. According to the method, for the copper-bismuth-containing concentrate, the measures of flotation reagent (mud) removal, bismuth mineral inhibition through combination of strong base and a high-efficiency environment-friendly bismuth inhibitor CD-B1, enhanced selective recovery of copper minerals and the like are adopted, the copper-bismuth separation flotation environment is remarkably improved, the flotation efficiency of bismuth inhibition and copper flotation is improved, and effective separation and recovery of low-grade copper in the bismuth concentrate are achieved.

The present application belongs to the technical field of disposable plugging stopper, and specifically provides a combined pin plugging stopper and a slurry sealing and blocking method. The combined pin plugging stopper comprises a stopper pipe, a first pin, a sliding structure, a deformation piece, an inner support, a steel ball, a second pin, a connector, a slurry overflow port and a slurry outlet pipe. The stopper pipe is fixedly connected with a grouting pipe through the first pin. The other end of the stopper pipe is arranged along the central axis of the grouting pipe and is connected with the slurry outlet pipe. The steel ball is arranged inside the side of the stopper pipe close to the slurry outlet pipe. The second pin is arranged between the steel ball and the slurry outlet pipe. The sliding structure is sleeved on the stopper pipe and is provided with a plurality of deformation pieces. The end of the sliding structure close to the slurry outlet pipe is connected with the slurry overflow port arranged on the slurry outlet pipe through the connector. The inner support is arranged on the stopper pipe and between the adjacent two deformation pieces. The present application can solve the problem of sealing failure or difficult recovery in the high-pressure grouting process caused by the structural and technological defects of the existing plugging stopper.

The invention relates to the technical field of silicon powder recovery and dust removal, and particularly discloses a silicon powder recovery and dust removal device which comprises a gas generator, a cyclone separator communicated with the gas generator, a silicon powder recovery and dust removal assembly arranged at the upper end of the cyclone separator and a collection barrel arranged at the lower end of the cyclone separator. The bottom is provided with a communicating port used for being connected with a cyclone separator and internally provided with a cooling assembly and a pressurizer used for cooling and boosting gas; a slidable filter bag and an adsorption plate for electrostatic adsorption are arranged in the shell; the taking-out window is used for disassembling the filter bag located in the shell; a flow pipe for cooling and boosting gas to flow is arranged in the shell, and the flow pipe is rotationally connected with a static electricity generation assembly; the device solves the problem that silicon powder in a filter bag is difficult to recover due to the fact that extremely small silicon powder still cannot be effectively separated and the filter bag has structural defects in a traditional silicon powder recovery and dust removal device.

This invention relates to a method for the resource utilization of ammonia-containing waste generated during beryllium smelting, belonging to the technical field of wastewater and waste residue treatment and resource utilization. The method includes: mixing aluminum ammonium vanadium slag with beryllium washing wastewater; mixing the resulting aluminum ammonium vanadium beryllium solution with a calcium-containing transforming agent to obtain aluminum-calcium slag and aluminum ammonium vanadium purified solution; mixing solution A with beryllium precipitation wastewater and adding a calcium-containing alkaline substance to obtain a conditioning solution and gypsum slag; adding a decalcifying agent to the conditioning solution for precipitation and decalcification to obtain decalcified slag and decalcified solution; stripping the decalcified solution to obtain ammonia water and ammonia stripping mother liquor; solution A is an aluminum ammonium vanadium beryllium solution and / or aluminum ammonium vanadium purified solution; or, mixing the aluminum ammonium vanadium purified solution with beryllium precipitation wastewater and evaporating and crystallizing to obtain ammonium salts. This method fully utilizes the ammonia resources in the ammonia-containing waste generated during beryllium smelting, preparing ammonium salts or ammonia water, achieving full recycling of ammonia nitrogen in the production process.

The utility model relates to a high-speed centrifugal spray drying device, belonging to the field of drying equipment, the high-speed centrifugal spray drying device is used for medicine drying, the left and right sides of a feed pipe are connected with a liquid storage tank through liquid inlet pipes, liquid inlet is uniform, the top of the feed pipe and the left and right sides of a drying tank are provided with air inlet pipes, the air inlet pipes are provided with heaters, and the heaters are connected with the liquid storage tank. According to the technical scheme, hot air is guaranteed to sufficiently and evenly enter the drying tank, dried materials enter the recycling tank to be recycled, the problem that the dried materials are difficult to recycle is effectively solved, at least four inner tank bodies are arranged in the recycling tank and correspond to the drying tank, the first cyclone separator, the second cyclone separator and the dust remover respectively, and the materials are recycled in a graded mode. And the drying degree which does not meet the requirement can be recycled and re-dried.

The present invention relates to the technical field of denitration catalysts, and discloses a low-temperature denitration catalyst and a preparation method and application thereof, the method comprising the following steps: (1) mixing an active component precursor, a co-catalyst precursor, a binder and a solvent to obtain a slurry; (2) coating the slurry on a carrier surface, drying, and obtaining a catalyst precursor; (3) placing the catalyst precursor in water and applying a voltage as a working electrode; the carrier is a carbon-based carrier or a titanium-based carrier, the carbon-based carrier is a carbon material or a waste carbon-based catalyst, and the titanium-based carrier is titanium dioxide or a waste titanium-based catalyst. The present invention adopts an electrochemical method to replace the traditional roasting method to prepare an ultra-low temperature denitration catalyst, which greatly saves the catalyst preparation cost, and the low-temperature denitration catalyst has an excellent low-temperature catalytic efficiency; in addition, the low-temperature denitration catalyst can be prepared using waste carbon-based catalysts and waste titanium-based catalysts, thereby realizing the recycling of waste denitration catalysts.

The invention provides an iron ore abnormal region mining method, which comprises the following steps of: 1, analyzing the existing conditions of region ore blocks, determining that the middle section S27 P to S37 P ore bodies in the corresponding region of-350m to-410m are thick and large ore bodies, the average thickness of part of the ore bodies is 80m to 85m, the length of the south side trend of the region is 150m, chambers are arranged perpendicular to the ore body trend, and a first-step stope and a second-step stope can be arranged; 2, arrangement of a stope preparation project is conducted, a slope ramp is constructed through a-410 m middle section footwall transportation roadway to be communicated with a-398 m auxiliary middle section, construction is conducted to the south through the-398 m middle section footwall transportation roadway to be communicated with a-350 m to-410 m middle section draw shaft, a bottom structure is arranged through an S27P to S37P roof collapse area of a-410 m middle section by means of the auxiliary middle section, and the slope ramp is communicated with the-398 m auxiliary middle section; meanwhile, the arrangement mode of the bottom structure is innovated, the mining and cutting work amount is reduced to the maximum extent, a large number of U-shaped steel arch supports during two-step stoping are avoided, ore losses are reduced, construction safety is guaranteed, the problem that regional resources are difficult to recycle is solved, and therefore the mine productivity is improved.

The utility model relates to the field of environmental remediation, specifically disclose a kind of mine ecological remediation monitoring equipment, including pasting bottom block, the fixed bottom structure is connected to pasting bottom block lower surface, pasting bottom block upper surface is fixedly connected with guide slide rail, guide slide rail inner surface is slidably connected with weight block, weight block outer surface is fixedly connected with support piece column, support piece column inner surface is slidably connected with storage part shell, storage part shell inner surface is fixedly connected with bearing plate, bearing plate outer surface is connected with lock structure, the upper surface of lock structure is connected with outer control plate, the outer surface of outer control plate is fixedly connected with electric telescopic rod, outer control plate is pulled in storage part shell by electric telescopic rod drive outer control plate pull in inclined lock block, so that storage part shell no longer be stuck in support piece column, after counterweight air bag drive floating plate float, so that water quality monitor floats to water surface, reached the purpose of the detector of deep water area is recycled, solved the detector of deep water area position recovery difficult problem.

The invention discloses a cyclodextrin bionic organic iridium magnetic catalyst as well as a preparation method and application thereof, and belongs to the field of catalysts and application. The catalyst is prepared from three parts, namely magnetic nanoparticles, beta-cyclodextrin and an adamantane functionalized 2-pyridine benzamide type organic iridium catalyst, the magnetic nanoparticles are surface carboxylated magnetic nanoparticles, are activated by N-hydroxysuccinimide and then are connected with aminated beta-cyclodextrin through amido bonds; the beta-cyclodextrin is connected with adamantane in the adamantane functionalized 2-pyridine benzamide type organic iridium catalyst structure through a host-guest coupling effect. The invention further discloses application of the combination of the catalyst and a rhodamine 110 type quinone reduction regulation fluorescent probe in coenzyme NADH (Nicotinamide Adenine Dinucleotide Hormone) detection. The cyclodextrin bionic organic iridium magnetic catalyst MBs (at) CD (at) Ir prepared by the invention has excellent biocompatibility, and the constructed NADH fluorescent probe has the advantages of high sensitivity, good selectivity and easiness in recovery of the catalyst.

The present invention discloses a trenchless ultraviolet repair device for a drainage network and a process thereof, comprising a guide shaft body, a mobile carrier and an ultraviolet lamp body, wherein the guide shaft body extends into the pipeline along the setting direction of the pipeline and is attached to the inner wall of the pipeline, the head end of the guide shaft body is fixed to the pipeline mouth, the mobile carrier is arranged on the guide shaft body, the mobile carrier can move from its head end to the end along the guide shaft body, and the ultraviolet lamp body is fixed on the mobile carrier. The present invention has the following advantages and effects: it can effectively adapt to the layout of pipelines placed horizontally, vertically and obliquely; it has strong stability, the mobile carrier moves on the guide shaft body and will not collide with the inner wall of the pipeline; the inner wall of the pipeline that is wet, has water or oil will not hinder the movement of the mobile carrier, and it has the advantage of convenient recovery of the displacement carrier.

The application discloses application of phosphonated starch in selective flocculation desliming of fine-grained niobium ore, and a structural formula of the phosphonated starch is composed of a phosphonate group and a polysaccharide group of starch, the polysaccharide group is a high molecular chain formed by connecting multiple six-carbon sugar units through a glycosidic bond, and the phosphonate group is used for chelating with Nb 5+ A chelation reaction occurs, the polysaccharide group high molecular chain produces flocculation, and fine-grained gangue minerals are removed by selective flocculation. The phosphonate group of the phosphonated starch in the application chelates with exposed niobium ions on the surface of niobium minerals, so that the phosphonated starch is selectively adsorbed on the surface of the niobium minerals, the polysaccharide high molecular chain plays a bridging and sweeping role, fine-grained gangue slimes can be significantly removed by the method of selective flocculation desliming, the grade of Nb2O5 is improved, and the method has important significance for efficient recycling of fine-grained niobium ore.

The invention discloses a cyclodextrin bionic organic iridium magnetic catalyst and its preparation method and application, belonging to the field of catalysts and applications. The catalyst comprises three parts: magnetic nanoparticles, β-cyclodextrin and adamantane-functionalized 2-pyridine benzamide-type organic iridium catalyst; the magnetic nanoparticles are surface carboxylated magnetic nanoparticles, which are connected to the amino β-cyclodextrin through an amide bond after being activated by N-hydroxysuccinimide; the β-cyclodextrin is connected to the adamantane in the structure of the adamantane-functionalized 2-pyridine benzamide-type organic iridium catalyst through a host-guest coupling effect. It also includes the application of the catalyst combined with a rhodamine 110-type quinone reduction-regulated fluorescent probe in the detection of coenzyme NADH. The cyclodextrin bionic organic iridium magnetic catalyst MBs@CD@Ir prepared by the present invention has excellent biocompatibility, and the constructed NADH fluorescent probe has the advantages of high sensitivity, good selectivity and easy recovery of the catalyst.

The invention provides a Fe-MOF hydrogel bead phosphorus adsorption material and a preparation method thereof, and belongs to the technical field of adsorption materials. The preparation method comprises the following steps: mixing phthalic acid and ferric nitrate in an N, N-dimethylformamide solution, then carrying out ultrasonic dispersion and centrifugation to collect solid substances, and sequentially drying and grinding the solid substances to obtain a Fe-MOF material; the Fe-MOF material and sodium alginate are mixed in an aqueous solution for water bath heating, and Fe-MOF hydrogel is obtained; the Fe-MOF hydrogel is dropwise added into a CaCl2 solution, and after aging, the Fe-MOF hydrogel bead phosphorus adsorption material is obtained. The Fe-MOFs are loaded on the hydrogel, so that the separation efficiency of the material can be effectively improved, and the problem that the adsorbent is difficult to recover is solved.

This invention discloses a copper-based metal-organic framework composite photoelectrochemical Fenton catalytic membrane, its preparation method, and its application, belonging to the field of photoelectrochemical Fenton composite catalytic membrane and water treatment technology. The catalytic membrane consists of an acidified carbon nanotube (ACCNTs) substrate and a copper-based MOF (CuBTC)@graphite-phase carbon nitride (CN) composite catalytic layer supported on its surface. First, carbon nanotubes (CNTs) are acidified with mixed acid to obtain ACCNTs, and an ACCNTs substrate membrane is prepared by vacuum filtration. Subsequently, a CuBTC@CN catalytic layer is further loaded onto the surface of the ACCNTs substrate membrane using vacuum filtration. The ACCNTs substrate enhances the electron transport rate and promotes hydrogen peroxide generation; the heterojunction formed by CuBTC and CN significantly inhibits photogenerated carrier recombination and broadens the visible light response range. The resulting copper-based metal-organic framework composite photoelectrochemical Fenton catalytic membrane can achieve simultaneous filtration and catalytic degradation in continuous flow mode, exhibiting good removal efficiency for organic wastewater.

The present application belongs to the technical field of mineral processing and environmental protection, and particularly relates to a method for removing impurity metal ions and compounds in raffinate acid. The impurity metal ions and compounds such as iron, magnesium and aluminum in the raffinate acid are selectively removed under the synergistic action of adsorption materials and flotation reagents. The method mainly uses the strong adsorption of the adsorption materials and the strong selectivity of the specific flotation reagents, and uses the adsorption materials and the flotation reagents in combination, and through adjusting and controlling the types, the ratio, the dosage of the adsorption materials and the flotation reagents, and the reaction sequence, the time and the temperature, the selective removal of the impurity metal ions and compounds in the raffinate acid is realized, and the comprehensive utilization rate of the raffinate acid is improved. The method is suitable for the purification system of the raffinate acid in the phosphorus chemical industry, and has the advantages of simple method, strong selectivity, remarkable effect and short action time, and has important significance for solving the problems of difficult disposal and reuse of the raffinate acid, high production cost of the phosphorus chemical industry and serious waste of phosphorus resources.

The invention relates to the technical field of oil production engineering, and provides an underground casing packer recovery safety connector which comprises an upper connector, a lower connector, a shear pin and an O-shaped sealing ring. The upper connector is connected with the lower connector in a matched mode, the shear pin is arranged on the overlapped portion where the upper connector and the lower connector are connected in a matched mode, and the shear pin is flush with the outer circle of the lower connector. And the O-shaped sealing ring is arranged between the upper joint and the lower joint for sealing. According to the scheme, the safety connector can optimize the structure of an oil well layered pipe column, and the problem that a well packer is difficult to recycle is effectively solved. The safety joint is simple and reliable in structure, has enough strength, and can not influence the normal use of the layered pipe column. And separation is ensured under a certain load, and smooth recovery of the tubular column above the joint is ensured. The safety joint has a proper salvage size, ensures that a salvage tool can grasp the residual tubular column, does not affect setting and recovery of the packer, and has great significance for safe recovery of the oil tube and the packer.

The application relates to the technical field of plastic packaging film, and particularly discloses a recyclable PE wrapping film and a preparation method thereof. The recyclable PE wrapping film comprises the following raw materials: PE recyclable material, ethylene-propylene-diene rubber, active phenolic resin, metal halide, metallocene POE, HDPE resin, tackifying masterbatch, and the balance of LLDPE resin; the preparation method is as follows: the LLDPE resin is mixed with the PE recyclable material and the ethylene-propylene-diene rubber, hot melting, the active phenolic resin and the metal halide are added from the side feeding, hot melting, and a melt is prepared; the melt is cast and cooled to prepare a cast sheet, the cast sheet is drawn and stretched, and then subjected to corona treatment, curling and slitting. The recyclable PE wrapping film does not add opening agents, slip agents and anti-fog agents, ensures that the product is easy to recycle, the recyclable material has high purity, a high content of PE recyclable material is added, and the recyclable PE wrapping film still has relatively high tensile strength, puncture resistance and transparency.

The invention relates to the technical field of phenolic wastewater treatment, in particular to PDMS (Polydimethylsiloxane) / ferrocenyl MOF (Metal Organic Framework) catalytic material coating liquid, a PDMS / ferrocenyl MOF composite membrane as well as a preparation method and application of the PDMS / ferrocenyl MOF catalytic material coating liquid. A preparation method of the agent A comprises the following steps: dissolving room temperature vulcanized methyl silicone rubber (RTV-107) and high-hydrogen-content silicone oil in a required amount in a first solvent to obtain a reaction solution, adding a catalyst, and stirring for reaction to obtain the agent A; a preparation method of the agent B comprises the step of dispersing ferrocene MOF powder into a second solvent to obtain the agent B. The stability of the MOF material is improved through PDMS coating, the problem that the MOF material is difficult to recycle is solved, phenolic substances in the coal chemical industry wastewater can be effectively degraded, and recycling is facilitated.

The present invention belongs to the field of mineral processing technology, and particularly relates to a mineral processing process for recovering gold and silver from sulfide concentrate. The method first uses a de-agent to de-agent the sulfide concentrate, and then re-grinds it after de-agenting to a specified fineness, and then adds a passivating agent or a deactivating agent to passivate the surface of non-gold and silver-bearing minerals, and finally adds a variety of flotation agents to perform multiple flotation operations to separate high-grade gold and silver concentrates from the sulfide concentrate. The present invention lays a foundation for the production process of directly selecting precious metals such as gold and silver from sulfide concentrate. Compared with the existing process, the technical solution provided by the present invention has the advantages of low cost, simple operation, high efficiency in extracting gold and silver, and no environmental pressure. It not only effectively solves the problem of difficult recovery of precious metals associated with complex sulfide concentrates, but also reduces the load of subsequent smelting operations, achieving the purpose of both environmental and economic benefits.

This invention belongs to the field of environmental materials, specifically relating to a method for preparing and applying a composite pollutant treatment agent, comprising the following steps: Step 1, dissolving polyacrylonitrile in N,N-dimethylformamide, stirring thoroughly to obtain a spinning solution, and performing electrospinning to obtain an electrospun polyacrylonitrile film; Step 2, pre-oxidizing the electrospun polyacrylonitrile film in an air atmosphere to obtain a pre-oxidized polyacrylonitrile film; Step 3, carbonizing the pre-oxidized polyacrylonitrile film under nitrogen protection to obtain electrospun carbon fibers; Step 4, dissolving bismuth nitrate in ethylene glycol, and obtaining a bismuth nitrate / ethylene glycol solution by magnetic stirring; Step 5, purifying anhydrous ethanol by dehydration using a 3A molecular sieve; Step 6, mixing the bismuth nitrate / ethylene glycol solution obtained in Step 4 with the anhydrous ethanol obtained in Step 5, adding the electrospun carbon fibers obtained in Step 3, performing a hydrothermal reaction, and washing and drying the reaction product to obtain Bi2O supported on carbon fibers with both adsorption and degradation effects. 2.33 / Bi2O3 composite pollutant treatment agent. This composite pollutant treatment agent is used for the catalytic degradation and adsorption of organic pollutants in wastewater.