31 results about "Hazardous metals" patented technology

The invention discloses a method for treating heavy metal wastewater by using a bimetal MOFs (Metal-Organic Frameworks) derived carbon-porous carbon composite electrode material. The method comprises the following steps: preparing the bimetal MOFs derived carbon-porous carbon into a composite electrode material, and assembling the composite electrode material as a working electrode into a capacitive deionization device; and carrying out electro-adsorption treatment on the heavy metal wastewater by utilizing the capacitive deionization device to finish treatment on the heavy metal wastewater. According to the present invention, the bimetallic MOFs derived carbon-porous carbon assembled capacitive deionization device is utilized to treat the heavy metal wastewater, such that the characteristics of high adsorption capacity and selective adsorption are provided while the heavy metal ions are efficiently and rapidly removed so as to achieve the efficient removal of the heavy metals in the wastewater, and the selective recovery of the toxic and harmful metals can be performed; the method has the advantages of being low in cost, simple in process, convenient to operate, high in treatment efficiency, good in removal effect, environmentally friendly and the like, and has high application value and wide application prospects in the aspect of heavy metal polluted water treatment.

The invention provides a comprehensive treatment method for gold-copper-containing smelting wastewater, and belongs to the technical field of wastewater treatment. The method comprises the following steps: adding reduced iron powder into the gold-containing copper smelting wastewater, and fully reacting to obtain an iron powder replacement turbid solution; a first pH value regulator is added into the iron powder replacement turbid solution, an oxidizing agent is added after the pH value is regulated, and an iron-removed turbid solution is obtained after full reaction; adding a flocculating agent into the iron-removed turbid liquid, fully flocculating, and carrying out solid-liquid separation to obtain iron-removed underflow and iron-removed overflow; carrying out filter pressing dehydration treatment on the iron-removed underflow to obtain gold-copper slag and filter pressing liquid; and mixing the iron-removed overflow and the press filtrate, adding a second pH value regulator, and fully reacting after regulating the pH value to obtain a neutralized turbid solution. By means of the mode, valuable substances are effectively recycled, meanwhile, harmful metal ions in the wastewater are prevented from affecting a production system or the ecological environment, hazardous waste is not generated in the whole process, and unification of environmental benefits and economic benefits is achieved.

A method of joining a first component and a second component that are made of dissimilar metals. In some embodiments, the method comprises applying friction between the first component and the second component sufficient to generate a layer of quasi-liquid metal and produce shear localization within the quasi-liquid metal at a dissimilar metal interface between the first component and the second component and terminating the application of friction at a predetermined time after generation of the quasi-liquid metal. In some embodiments, the method comprises applying amorphous metal between at least a portion of the first component and the second component at a dissimilar metal interface, heating the amorphous metal to a temperature between its glass transition temperature (Tg) and the lowest melting temperature of the components involved, and applying compression pressure to generate thermoplastic deformation of the amorphous metal.

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.

The present application relates to a method for sealing harmful metals by fly ash-titanium-containing blast furnace slag geopolymer, and belongs to the technical field of harmful metal pollution treatment. The present application uses fly ash and titanium-containing blast furnace slag as main raw materials, and is prepared through steps of baking, mixing with activator, geopolymer pre-sealing and microwave sealing. The synthesized geopolymer has advantages of high temperature resistance, acid, alkali and salt corrosion resistance, small shrinkage rate in freeze-thaw cycle and low permeability coefficient, and is a new type of green building material, which has broad application prospects in sealing harmful metals. The present application realizes industrial production and application of geopolymer synthesized by fly ash and titanium-containing blast furnace slag. The present application uses industrial solid waste as main raw material to prepare new building materials, which can consume a large amount of solid waste containing active silicon and aluminum, and form a three-dimensional network structure geopolymer structure under low temperature and alkali activation conditions, and can seal toxic metal ions in the skeleton structure.

The invention belongs to the field of waste battery material recovery, and provides a waste battery material recovery method based on a plasma chemical vapor deposition technology. Firstly, a network compound with a metal chelating function is synthesized and forms stable combination with active sites on the surface of an electrode in subsequent coating deposition, and harmful metal ions are effectively captured; secondly, a fluorine-containing imidazolyl-quaternary ammonium salt network compound is designed, and the fluorine-containing imidazolyl-quaternary ammonium salt network compound is endowed with excellent surface passivation and chemical stability by a fluorinated group; in the stripping process, the active material and the metal current collector are separated by periodically adjusting the temperature and combining the plasma technology, the stripped active powder can be further extracted and purified through acid pickling treatment, and the metal current collector is combined with a fluorine-containing compound and an inorganic silica network deposition process. The metal surface is endowed with good corrosion resistance and reprocessing performance, the method is suitable for recycling of electrode materials in waste batteries, and meanwhile the recycling value of related materials is improved.

The invention discloses a composite formula of an environment-friendly degreasing agent and a preparation method of the environment-friendly degreasing agent, and relates to the technical field of industrial cleaning agents.A specific low-molecular-weight chitosan-citric acid cross-linked substance is introduced to serve as an oil stain flocculation bridge and a corrosion inhibition synergist, cationic (-NH3 +) and carboxyl (-COOH) exist on a molecular chain of the cross-linked substance at the same time, and therefore the oil stain flocculation bridge and the corrosion inhibition synergist can be effectively inhibited; the flocculating agent can strongly adsorb negatively-charged emulsified oil drops or dispersed oil drops, forms large floccules for sedimentation through molecular chain bridging, improves the oil removal efficiency, is adsorbed on the metal surface to form a protective film, obviously enhances the corrosion inhibition performance of a formula, especially has an outstanding effect on ferrous metals, overcomes the defects that a flocculating agent introduces harmful metal ions and has no corrosion inhibition function, and has a good application prospect. The natural polysaccharide modifier is endowed with the double functions of efficient flocculation and corrosion inhibition, and the cross-linking agent is stable in structure and not prone to failure due to too fast biodegradation.

The present invention discloses a metallic luster glaze frit, its preparation method, and a ceramic product. The metallic luster glaze frit provided by the present invention utilizes the principle of phase separation and crystallization to make the fired glaze surface present a metallic luster. The glaze frit is rich in bone meal, which has strong phase separation ability and can promote the nucleation and crystallization components of iron oxide or iron phosphate; copper oxide, as a colorant and crystallization agent, under the action of a large amount of zinc oxide in the glaze frit components, phase-separates to precipitate CuFe2O4 crystals, making the glaze surface present a metallic luster. At the same time, no harmful metals such as lead frit are added to the glaze frit, which is green and environmentally friendly. Moreover, the components of the metallic luster glaze frit are simple, the cost is low, and the glazing process is simple, having extremely high practical application value. Finally, the novel green and environmentally friendly metallic luster glaze frit provided by the present invention can withstand high-temperature firing, the fired glaze surface has good metallic luster, and the glossiness is greater than 95, providing a broader space and more extensive choices for the decoration of ceramics.

This invention discloses a beneficiation method for complex altered copper-molybdenum ore with high sulfur, iron, talc, and zinc content. Before grinding, harmful metal ions are removed from the raw ore to weaken the floatability of sphalerite and pyrite. The pretreated slurry rapidly floats out talc and coarse-grained copper minerals with high degree of liberation, separating the talc to obtain a high-grade coarse-grained copper concentrate. The rapidly floating tailings float out copper, molybdenum, zinc, and sulfur minerals with complex intergrowth characteristics, as well as some floatable individual minerals. An inhibitor is added, and the ore is re-ground to further weaken the floatability of easily floatable sphalerite and pyrite, thereby separating a mixed concentrate of fine-grained copper minerals and molybdenite. The separated tailings are incorporated into the copper-molybdenum scavenging tailings to recover sphalerite, and the fine-grained copper-molybdenum mixed concentrate is incorporated into the coarse-grained copper concentrate for copper-molybdenum separation, yielding copper concentrate and molybdenum concentrate products. This invention achieves the separation and recovery of copper, molybdenum, and zinc by intervening in harmful metal ions in advance and employing staged grinding and staged flotation, thereby progressively enhancing the differences in surface hydrophobicity of the polymetallic minerals.

1. Name of the product in this design: Handheld metal detector. 2. Purpose of this design: For detecting hazardous metal materials. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The present application provides a comprehensive treatment method for gold-containing copper smelting wastewater, belonging to the technical field of wastewater treatment. The method includes: adding reduced iron powder to the gold-containing copper smelting wastewater, and obtaining a turbid liquid after iron powder replacement through sufficient reaction; adding a first pH regulator to the turbid liquid after iron powder replacement, adjusting the pH value and then adding an oxidant, and obtaining a turbid liquid after iron removal through sufficient reaction; adding a flocculant to the turbid liquid after iron removal, and after sufficient flocculation, obtaining an underflow after iron removal and an overflow after iron removal through solid-liquid separation; performing pressure filtration and dehydration treatment on the underflow after iron removal to obtain gold-copper slag and filtrate after pressure filtration; mixing the overflow after iron removal and the filtrate after pressure filtration, and adding a second pH regulator, adjusting the pH value and then reacting sufficiently to obtain a neutralized turbid liquid. Through the above method, while effectively recovering valuable substances, the present application avoids the impact of harmful metal ions in the wastewater on the production system or the ecological environment, and no hazardous waste is generated throughout the process, achieving the unity of environmental benefits and economic benefits.

1. Name of the product in this design: Handheld metal detector. 2. Purpose of this design: For detecting hazardous metal materials. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention relates to the technical field of electroplating sludge treatment, and provides an electroplating sludge treatment method which comprises the following steps: adding sodium salt into electroplating sludge, roasting, washing and filtering to obtain washing liquid and filter residues; mixing the filter residues with water, and adding acid for acid leaching to obtain eluent so as to leach valuable heavy metals; adding resin containing monophosphate groups into the pickle liquor; the resin adsorbing iron is desorbed; carrying out modification treatment on the bagasse by using the eluent, adjusting the pH value to 4-6 by using a sodium hydroxide solution, and loading the iron precipitate in the bagasse to form positive charges; chromium in the liquid is adsorbed by the modified bagasse; and the obtained liquid is precipitated through a precipitation method, valuable metal is used for pyrogenic smelting, and the wastewater discharge requirement is met. The modified biomass adsorbent is used, emission of harmful metal is reduced, the influence on the environment is reduced, electroplating sludge can be effectively treated, chromium-containing wastewater can be treated, one agent has multiple purposes, and the treatment efficiency and economical efficiency are improved.

The utility model discloses a device for adsorbing metal foreign matters in solid products, which comprises a main body and at least one magnetic adsorption mechanism, the inside of the main body is of a hollow structure, the front side plate of the main body is provided with at least one mounting hole, the magnetic adsorption mechanism comprises a mounting plate, the inner side surface of the mounting plate is provided with at least one adsorption magnetic strip, and the adsorption magnetic strip is arranged in the mounting plate. According to the utility model, foreign matters such as metal particles and the like in a solid product are adsorbed through the double-layer drawable magnetic adsorption mechanism, so that the purpose of removing harmful metal foreign matters in the product is achieved, the qualified rate of the product is improved, the production cost is reduced, the production efficiency is improved, and the production cost is reduced. Potential safety hazards are avoided, the device is simple in structure and easy to operate, adsorption magnetic strips are only added in the conveying process, extra workload cannot be increased, and the working efficiency is guaranteed; and the assembling and connecting structure of the hand-screwing type bolt is convenient for personnel to disassemble, clean and replace the adsorption magnetic strip.

The invention discloses an acid wastewater permeable reactive barrier filling material as well as a preparation method and application thereof, and belongs to the technical field of acid mine wastewater treatment and water environment remediation, the filling material comprises the following components in percentage by mass: 20-60% of modified tailing sand and 40-80% of municipal sludge biochar. According to the permeable reactive barrier filler, the gelling performance and compressive strength of the filler are enhanced through modification of the iron ore tailings, the adsorption capacity of the filler to toxic and harmful metal is increased through the municipal sludge biochar, meanwhile, attached growth of sulfate reducing bacteria is promoted through biochar pores and organic matter contained in the biochar, and the service cycle of the permeable reactive barrier filler is prolonged; the treatment efficiency of the acid wastewater is improved. The composite filler has the characteristics of wide raw material sources, simple preparation process, rich reaction ways and the like, and has a better market application prospect in the aspects of mine wastewater treatment and water environment restoration.

The invention discloses an aluminum alloy containing rare earth, a preparation method of the aluminum alloy and heating and ventilation equipment. The rare earth-containing aluminum alloy comprises the following components in percentage by mass: 0.05%-0.30% of Fe, 0.05%-0.25% of Si, 0.80%-1.6% of Mn, 0.05%-0.45% of Cu, 0.01%-0.15% of Ti, 0.10%-0.20% of Zr, 0.05%-0.30% of rare earth and the balance of Al and impurity elements, wherein the sum of the mass percentages of the impurity elements is less than or equal to 0.20%. Elements of the aluminum alloy are optimized and selected to achieve uniform distribution of intermetallic compounds of the aluminum alloy, so that the corrosion potential of an aluminum matrix is improved, the corrosion potential of harmful intermetallic compounds is reduced, the corrosion potential difference between the aluminum alloy matrix and the intermetallic compounds is reduced, and the corrosion resistance is improved; after the aluminum alloy containing the rare earth is exposed for 12 days under a cyclic acidic seawater test (SWAAT) of the ASTM G85 standard, the corrosion depth can reach 150 microns and below.

The utility model discloses a standard filter membrane integrated manufacturing device in the technical field of harmful metal pollution detection in the air, aiming to solve the problems of low efficiency and easy contamination in the laboratory preparation of filter membranes in the prior art. It includes a bracket, a mask is provided on the bracket, and the mask is used to form a closed chamber with the upper surface of the bracket, and an annular movable part and an intelligent pipette are arranged in the chamber. The annular movable part is provided with a plurality of processing stations, each of which can be placed on a filter membrane box, and each of which can be moved to another adjacent processing station along a circular path, and the intelligent pipette is used to add a standard substance to the filter membrane in the filter membrane box; the utility model is used to provide a closed environment in the laboratory to form an integrated processing of the filter membrane, with high processing efficiency and can effectively reduce the possibility of contact between the filter membrane sample and the pollutant, thereby ensuring the preparation yield and efficiency of the filter membrane.

The invention belongs to the field of laser cutting devices, and particularly relates to a laser cutting device and method based on automobile brake pad steel backing production. An adjusting table is movably connected to the top end of the device lower body, a movable cutting table is movably connected to the top end of the adjusting table, and a filtering protection mechanism is arranged on the outer side of the movable cutting table. Through the design of the filtering protection mechanism, the functions of automatically collecting poisonous gas and harmful metal particles and filtering and discharging the poisonous gas and the harmful metal particles are achieved, and the problem that an existing device is not provided with an assembly capable of collecting and filtering smoke generated by cutting in the laser cutting process is solved; the problems that poisonous gas and harmful metal particles can be generated during laser cutting, if the poisonous gas and the harmful metal particles are not collected, filtered and discharged, and operators inhale smoke containing the metal particles for a long time, the respiratory system can be seriously damaged are solved, and protection on the workers is improved.

One of our goals is to provide a new agent that can remove harmful metals that have entered the body, and that is safe and easy to ingest. [Solution] The above problem is solved by providing an oral composition for removing metals, which contains calcium phosphate as an active ingredient.

The utility model belongs to the technical field of sewage filtration, and particularly relates to a resin throttling and filtering device which comprises a shell, an arc-shaped filtering cavity is formed in the shell, an arc-shaped limiting block is detachably arranged at the upper end of the arc-shaped filtering cavity, a detection cover is detachably arranged at the upper end of the shell, a motor is arranged on the inner side wall of the arc-shaped filtering cavity, and the arc-shaped limiting block is detachably arranged on the detection cover. A rotating shaft is installed at the output end of the motor, one end of the rotating shaft is rotatably installed on the other inner side wall of the arc-shaped filtering cavity, the rotating shaft is sleeved with a sleeve, one end of a supporting frame is arranged on the sleeve, and a fixing ring is arranged at the other end of the supporting frame; resin has efficient ion exchange and adsorption capacity and can effectively remove soluble pollutants such as heavy metal ions, organic matters and the like in water, harmful metal ions such as lead, mercury, chromium and the like, organic solvents, grease and the like, and the filter bag can remove large-particle impurities such as suspended solids, colloids and the like in the water, so that the water is clearer and more transparent.

The application discloses a method for synthesizing sodalite by a hydrothermal method and solidifying and stabilizing harmful metal elements and application thereof, and belongs to the technical field of solidification treatment of hazardous waste. In the method, raw materials for synthesizing the sodalite, such as silicon dioxide, are pretreated by ball milling, and then the sodalite solidification body is rapidly synthesized by hydrothermal synthesis at a low temperature for a certain time, and radioactive harmful substances, such as radioactive waste salt in the nuclear industry, are simultaneously solidified in the process. The sodalite synthesized under the optimized conditions can also be used as an adsorbent to be extended to environmental media such as aqueous solution and liquid salt and be used for adsorbing radioactive or other common heavy metal harmful elements. The method has the advantages of fast reaction rate, high immobilization rate, strong stability, low cost and environmental friendliness and the like, and has important application value in the field of treatment and disposal of radioactive waste salt and other hazardous waste.

The utility model relates to the field of corrugated paper processing, in particular to a slag removing and sieving device for corrugated paper production. The technical problems that in the using process of the slag removing and screening device, due to the fact that the structure is complex, slag removing equipment and screening equipment need to be used, the workload is seriously increased, the efficiency is reduced, and the using requirement cannot be met are solved. According to the technical scheme, the slag removing and screening device for corrugated paper production comprises a fixed bottom plate and further comprises a feeding hopper, a screening assembly, a slag removing assembly, a discharging opening, a limiting inserting groove and a limiting inserting plate. By arranging the screening assembly, small particles and impurities can fall down through the screening net so that the impurities and waste materials in corrugated paper slag removal can be effectively separated, the limiting sliding blocks at the front end and the rear end are in sliding connection with the interiors of the limiting sliding grooves respectively, the stability of the screening box in the left-right shaking process is improved, and the deviation phenomenon is avoided; and through the slag removal assembly, harmful metal particles can be adsorbed, and recycling is prevented.

The present invention discloses a method for smelting and enriching platinum group metals from industrial waste iron scraps and waste automotive exhaust catalysts, which relates to the technical field of solid waste resource recovery and metallurgy. The method for smelting and enriching platinum group metals includes: uniformly mixing waste automotive exhaust catalysts, slag formers, reducing agents and industrial waste iron scraps, and performing high-temperature smelting to obtain an alloy phase and a slag phase containing platinum group metals. In the method for smelting and enriching platinum group metals of the present invention, by using industrial waste iron scraps instead of conventional elemental iron collectors, not only the production cost is saved, but also the un-reduced FeO in the industrial waste iron scraps enters the molten slag, which will promote the fluidity of the molten slag, facilitate the separation of the slag and the metal. Moreover, by adding boron trioxide to the slag former and controlling the mass ratio of CaO and SiO2 in the molten slag and the mass fraction of magnesium oxide, the recovery rates of platinum, palladium and rhodium are all greater than 98%, and the content of harmful metals is far lower than the environmental protection industry standard of the People's Republic of China.

The invention discloses a method for smelting and enriching platinum group metals by using industrial scrap iron and a waste automobile exhaust catalyst, and relates to the technical field of solid waste resource recovery and metallurgy. The method for smelting and enriching the platinum group metal comprises the following steps: uniformly mixing a waste automobile exhaust catalyst, a slag former, a reducing agent and industrial scrap iron, and smelting at high temperature to obtain an alloy phase containing the platinum group metal and a slag phase. According to the method for smelting and enriching the platinum group metal, the industrial scrap iron replaces a conventional elemental iron trapping agent, the production cost is saved, FeO which is not reduced in the industrial scrap iron enters the slag, the fluidity of the slag can be promoted, slag-metal separation is facilitated, diboron trioxide is added into the slagging constituent, and the slag-metal separation efficiency is improved. And the mass ratio of CaO to SiO2 in the slag and the mass fraction of magnesium oxide are controlled, so that the recovery rates of platinum, palladium and rhodium are all greater than 98%, and the content of harmful metals is far lower than the environmental protection industry standard of the People's Republic of China.

The invention provides a process method for preparing a building material from solidified and stabilized drilling solid waste, and the building material is prepared from the following components in parts by weight: desulfurized fly ash, slag powder, desulfurized gypsum, carbide slag, a decomposing agent and drilling solid waste; the process method for preparing the building material from the cured and stabilized drilling solid waste is used for curing the drilling solid waste to prepare a compression molding brick wall material, the compressive strength of a compression molding brick after 14 days of maintenance can reach 16.2 MPa, and the compressive strength after 28 days of maintenance can reach 24.5 MPa. The heavy metal leaching concentration of the building material prepared from the solidified drilling solid waste is lower than the limit value of leachable harmful metal elements of a wall material, the building material can be used as a building material for resource utilization, and good economic benefits are generated.

The invention relates to the technical field of water treatment and precious metal separation and purification, and particularly discloses a method for synchronously removing, separating and purifying precious metal silver and harmful metal in wastewater. The method comprises the following steps: (1) adding an adsorbent containing amidoxime groups on the surface into wastewater, and carrying out adsorption treatment; (2) adding the adsorbent after adsorption into a primary desorption solution of non-oxidizing acid, and carrying out primary desorption to remove hetero-ions except silver; and (3) the adsorbent obtained after primary desorption is added into a secondary desorption solution of oxidizing acid, secondary desorption is conducted, and a high-purity silver solution is obtained. The method is based on the principle that amidoxime groups can spontaneously reduce silver ions into acid-resistant silver nanoparticles, and other metal ions form acidolysis complexes. The method is simple and convenient, an external electric field or a reducing agent is not needed, water purification and high-purity recovery of silver are achieved, and remarkable economic and environmental benefits are achieved.

The invention relates to a brick-mortar-adhesive biomass aerogel dried at normal temperature and normal pressure and application of the brick-mortar-adhesive biomass aerogel to detection and adsorption of Cr (VI). The method comprises the following five steps: (1) preparing CDs quantum dots by a hydrothermal method; (2) preparing a PAN nanofiber membrane by an electrostatic spinning technology; (3) constructing CDs (at) PAN nanofiber CP by a solvothermal method; (4) preparing oxidized cellulose TOCNFs by an oxidation method; and (5) preparing the CP / CMC / TOCNFs aerogel by adopting a normal-temperature and normal-pressure drying method. The prepared CP / CMC / TOCNFs aerogel has the advantages of being light in weight, small in shrinkage rate, capable of being prepared on a large scale, good in underwater memory performance, good in mechanical property, good in fluorescent property and the like, high-sensitivity and high-selectivity detection and strong adsorption on Cr (VI) are achieved, and wide application prospects are achieved in the aspect of treating harmful metal in wastewater.

The invention relates to the field of metallurgical engineering, and discloses a zinc anode slime comprehensive recovery treatment method which comprises the following steps: pretreating zinc anode slime to remove impurities; determining optimal operation parameters in the recovery process based on an optimal control method; metal components are leached under the optimal condition, and a metal ion solution is formed; zinc, copper, lead and silver are sequentially recycled in an electrolysis mode; the waste residues are subjected to high-temperature roasting treatment, residual metal is recycled, and resource utilization is achieved; and carrying out chemical precipitation treatment on the waste liquid, and after metal ions are removed, discharging the waste liquid up to standard or recycling the waste liquid. By means of the multi-stage waste liquid chemical precipitation and ion exchange combined process, various harmful metal ions in complex waste liquid generated in the zinc anode slime leaching process are efficiently removed, the treatment effect that the waste liquid can be stably discharged is achieved, and compared with the prior art, the purification degree and the process stability are improved.

The invention discloses a method for synthesizing sodalite through a hydrothermal method and solidifying and stabilizing harmful metal nuclides and application, and belongs to the technical field of solidification treatment of hazardous wastes. According to the method, silicon dioxide and other raw materials for synthesizing sodalite are subjected to ball milling pretreatment and then subjected to heat preservation for a certain time at the low temperature, sodalite solidified bodies are rapidly subjected to hydro-thermal synthesis, and radioactive harmful substances such as nuclear industry radioactive waste salt are synchronously solidified in the process; the sodalite synthesized under optimized conditions can also be used as an adsorbent to be expanded and applied to environmental media such as aqueous solutions and liquid salts, and is used for adsorbing radioactive or other common heavy metal harmful elements. The method has the advantages of high reaction rate, high immobilization rate, strong stability, low cost, environmental friendliness and the like, and has important application value in the field of treatment and disposal of hazardous wastes such as radioactive waste salt and the like.

The utility model relates to a pre-filter pollution discharge structure with a magnetic attraction function. The pre-filter pollution discharge structure comprises a pre-filter pollution discharge seat, a pre-filter bottle, a magnetic attraction component and a valve component, the pre-filter bottle is inserted into the pre-filter pollution discharge seat, and a water outlet of the pre-filter bottle is communicated with the pre-filter pollution discharge seat; the magnetic attraction assembly is installed on the pre-filter pollution discharge seat and located on the outer wall of the pre-filter bottle, the magnetic attraction assembly is located above a water outlet of the pre-filter bottle or flush with the water outlet of the pre-filter bottle, and the valve assembly is installed between the water outlet of the pre-filter bottle and the pre-filter pollution discharge seat. The water purifier has the advantages that the structure is compact, the product size can be reduced, the material cost and the packaging cost are reduced, and scrap iron, cobalt, nickel and other harmful metals in water can be adsorbed.