17 results about "Hazardous metals" patented technology

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.

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.

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 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 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 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 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 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.

The present application discloses a rare earth-containing aluminum alloy and a preparation method therefor, and a heating, ventilation and air conditioning device. 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 being Al and impurity elements, wherein the sum of the mass percentages of the impurity elements is less than or equal to 0.20%. In the present application, the selection of elements of an aluminum alloy is optimized to implement uniform distribution of intermetallic compounds of the aluminum alloy, such that the corrosion potential of an aluminum matrix is increased, and the corrosion potential of harmful intermetallic compounds is decreased, thereby reducing the corrosion potential difference between an aluminum alloy matrix and the intermetallic compounds, and improving the corrosion resistance. Additionally, the rare earth-containing aluminum alloy of the present application can achieve a corrosion depth of 150 μm or less after exposed for 12 days in sea water acetic acid test (SWAAT) per ASTM G85 standard.