35results about How to "Environmental recycling" patented technology

The invention discloses a preparation method of a Pb oxide nano powder for recovery and manufacture of a lead acid battery. The method comprises the steps of: (1) reacting lead salt or waste lead acid battery lead paste with an organic or inorganic compound capable of complexing with Pb atom / ion, so as to realize desulphurization or reloading of acid radical; and (2) carrying out treatment processes of filtering, drying for removing water and heating for decomposition, so as to obtain the Pb oxide nano powder. The method of the invention realizes an environment-friendly and energy-efficient recovery and production process with substantially reduced production cost; meanwhile, the prepared Pb oxide powder is beneficial for enhancement of product performance.

The invention provides a waste rigid polyurethane foaming plastic recycling and use method which comprises the following steps: firstly, carrying out shearing crushing, grinding, adding a surfactant in the shearing crushing and grinding process, and continuously grinding till the particle size of obtained waste rigid polyurethane foaming plastic powder is smaller than or equal to 40 [mu]m, the volume water absorption rate is greater than or equal to 100% and the aperture ratio is greater than or equal to 90%. Under coactions of a mechanical action and a chemical action, closed cell foams are changed into opened cell foams, then the foams have water-absorbing quality and can be used as a water absorption powder material; the material can be mixed with fermentation culture seeds, carbohydrate and excrement below livestock beds in net bed breeding, and a composted fertilizer can be prepared through direct in-situ fermentation; the material can be also used as a medium of medium cultivation of soilless culture; the water absorption powder material has very wide application, and thus waste rigid polyurethane foaming plastics can be recycled and used with environmental protection, energyconservation and high efficiency.

The invention discloses a treatment method of third phases in a wet metallurgy extraction system. The method is characterized by comprising the following steps that a, extraction agents are added intothe third phases in the wet metallurgy extraction system; stirring is performed; b, acid is added into a mixture obtained in the step a for performing back extraction; c, a mixture obtained after back extraction in the step b is subjected to phase splitting. The treatment method has the advantages that material liquid and organic phases carried by the third phases can be economically, simply andconveniently recovered in an environment-friendly way; the loss caused by a third phase extraction system is reduced.

Disclosed is a method for recycling silicon cutting waste mortar. The method comprises the steps of performing solid-liquid separation of the waste mortar; performing solid flow washing and vacuum filtration; drying the obtained filter cake, mixing with deionized water and performing activation reaction; adding water glass and sodium hydroxide successively and performing heating reaction, performing solid-liquid separation of the obtained product, performing ion exchange resin decolorization and distillation of the liquid phase to obtain silica sol, and performing solid phase washing and drying to obtain a silicon carbide raw material; and performing ultra precision filter of obtained liquid phase after solid-liquid separation of the waste mortar, adding a decoloring agent a filter aid to perform solid-liquid separation, reducing the conductivity, and heating and evaporating water to obtain finished polyethylene glycol cutting liquid. According to the technical scheme of the method, the flow line production is achieved, the silicon cutting waste mortar is recycled, the silica sol is prepared effectively, and the environmental pollution is reduced.

The invention discloses a method for completely recovering valuable components in a waste lithium battery. And carrying out electrified crushing on the disassembled single batteries under the protection of nitrogen atmosphere, and carrying out high-temperature pyrolysis in an anaerobic environment after crushing. Tail gas generated by high-temperature pyrolysis, electrolyte volatilization in the crushing process, metal dust generated by winnowing and acid mist generated by wet stripping are conveyed to an environment-friendly treatment system, and are discharged after being treated to reach the standard through the steps of secondary high-temperature combustion and the like. The pyrolyzed material passes through a multi-component screening and sorting system, and positive and negative pole pieces, a magnetic conductive shell and a pile head, and a non-magnetic shell and a pile head are sorted out. The sorted positive and negative pole pieces pass through a material wet stripping system, pole powder and copper-aluminum foil are separated, and copper and aluminum separation is achieved through color sorting. The recovery rate of the pole powder is 98% or above, the grade of the pole powder is high, copper and aluminum foil current collectors are recovered at the same time, metal shells and pile heads made of different materials are recovered in a classified mode, the recovery rate is high, the output value of the recovery process is increased, and the recovery process is environmentally friendly.

The invention discloses a method for completely recovering valuable metal components of a waste lithium battery by stripping pole powder by a hydrodynamic separation wet method. According to the invention, the disassembled waste lithium battery is directly crushed in an electrified manner and then is subjected to high-temperature pyrolysis in an anaerobic environment, and waste gas generated in the process is discharged after reaching the standard through secondary combustion and the like; performing hydrodynamic separation on the pyrolyzed material to separate a shell, a pile head, pole powder and positive and negative pole pieces; and performing wet stripping on the positive and negative pole pieces to strip residual pole powder, drying and granulating the separated copper-aluminum foil, performing color sorting, and separating out copper and aluminum particles. And combining the stripped residual pole powder with the pole powder obtained by cleaning the shell and the pile head, the pole powder obtained by hydrodynamic separation and the pole powder obtained by washing and screening the pole piece, filtering, dehydrating and drying to obtain positive and negative pole powder products, and further separating the shell and the pile head through magnetic separation and eddy current separation. The recovery rate of the polar powder reaches 98% or above, the grade of the polar powder is high, the recovery rate of copper and aluminum foil is also high, metal shells and pile heads made of different materials can be recovered in a classified mode, and the recovery and utilization output value is increased.

The invention discloses a fluid leaking and filling system. The fluid leaking and filling system comprises at least one working unit; the working unit comprises an oil gun, an oil pumping device connected with the oil gun and an oil injection device, a pressure source connected with the oil pumping device and the oil injection device, a waste oil recycling system connected with the oil pumping device, and an oil storage device connected with the oil injection device. The fluid leaking and filling system combines a plurality of working units into a system; power is uniformly provided by the pressure air source, the waste oil discharged by every working unit is intensively recycled by a waste oil recycling system, and new engine oil is uniformly provided by an oil storage device; the oil injection and recycling of waste oil are high-efficient, safe and environment-friendly; therefore, the fluid leaking and filling system is widely applied to 4S store or automobile repair shops.

The invention discloses a method for recycling copper, silver and gold step by step by using a waste printed circuit board. The method comprises the following steps: a, pretreatment of the waste printed circuit board: a, crushing of the waste printed circuit board; b, mixing copper sulfate with a saturated sodium chloride solution, adding the circuit board powder, stirring for reaction, and filtering; c, filtering the filtrate in the step b into deionized water, and standing and precipitating to obtain cuprous chloride; d, adding the gold and silver enriched slag obtained in the step b into an ammonia solution, stirring and leaching, and filtering to obtain a silver solution and gold enriched slag; and e, adding the gold-enriched slag obtained in the step d into a Cu < 2 + >-NH3-Na2S2O3 mixed solution, stirring and leaching to obtain a gold solution. According to the method, copper in the waste circuit board is converted into cuprous chloride in the cuprous chloride synthesis process, meanwhile, enrichment of Ag and Au is achieved, step-by-step recycling of copper, gold and silver is achieved, and the method is a simple and environment-friendly method for recycling valuable metal from the waste circuit board.

The invention discloses a method for recycling a graphite negative electrode of a waste battery. The method comprises the following steps of (1) taking a waste lithium ion battery, discharging, disassembling, manually cutting or mechanically crushing to obtain a negative plate, (2) mixing the negative plate obtained in the step (1) with salt which is hydrolyzed to be acidic and has strong oxidizing property, and soaking until copper in the negative plate is completely dissolved, and (3) filtering the solution containing graphite, washing the obtained filter residue with deionized water, and drying to obtain regenerated graphite. According to the method provided by the invention, the pollution generated by the waste lithium ion battery is effectively reduced, and the waste graphite material of the negative electrode can be recycled to regenerate the graphite negative electrode material. The regenerated material has excellent mechanical strength and toughness, good cycle performance, large reversible capacity and high capacity retention rate.

The invention provides a recovery treatment method of waste oil sludge, which comprises the following steps: preparing a sodium silicate composition from the following raw materials in parts by mass: 90-110 parts of sodium silicate, 5-10 parts of sodium bicarbonate, 2-5 parts of sodium dihydrogen phosphate, 0.2-0.5 part of disodium ethylene diamine tetraacetate, 0.2-0.5 part of nitrilotriacetic acid, 2-4 parts of fatty alcohol-polyoxyethylene ether and 2-5 parts of a demulsifier; and then mixing waste oil sludge, the sodium silicate composition and hot water for primary oil extraction, then mixing primary filter pressing residues, the sodium silicate composition and hot water for secondary oil extraction, then dehydrating, decolorizing and drying primary oil-rich liquid and secondary oil-rich liquid, performing wastewater treatment on primary wastewater and secondary wastewater, and subjecting the secondary filter pressing residues to pyrolysis treatment. The oil product recovery rate exceeds 97 wt%, and water is discharged after reaching the standard.

The invention discloses a preparation method of a magnesium-based metal air battery. The preparation method comprises the following steps of 1, preparing a positive electrode catalytic material, 2, preparing a battery shell, 3, mounting a positive plate, 4, packaging a battery shell, and 5, assembling the single batteries. The invention also discloses the magnesium-based metal air single battery and the magnesium-based metal air battery which are manufactured by using the preparation method. The composite paper and the magnesium-based metal air battery positive electrode catalytic material are subjected to hot gluing, so that firm packaging can be realized, and the sealing problems of electrolyte leakage and the like are avoided; the composite paper is light in weight, high in strength and good in toughness, so that the packaging weight can be greatly reduced, and enough compression resistance, falling resistance and impact resistance of the battery can be ensured; paper is adopted for packaging, batch and large-scale production is suitable, the production efficiency is obviously improved, and full-automatic heat sealing, folding and liquid injection can be achieved.

The invention discloses electric vehicle lead-acid battery slurry recovery equipment which comprises a shell. A decomposition feeding cavity is formed in the left side of the shell; a decomposition motor is fixed onto the left wall of the decomposition feeding cavity; a decomposition shaft is rotationally arranged on the right side of the decomposition motor; a fan-shaped bevel gear is fixedly arranged on the left side of the decomposition shaft; a feeding wheel is fixedly arranged at the middle section of the decomposition shaft; and a feeding hydraulic cavity is arranged on the upper side wall of the decomposition feeding cavity. According to the electric vehicle lead-acid battery slurry recovery equipment provided by the invention, lead-acid battery pieces in an battery of an electric vehicle can be decomposed and recovered, the shells of the battery pieces are broken, and lead in a slurry is extracted and recovered through electrolysis and oxidation reduction methods, so that the recovery process is environmentally friendly, the energy consumption is low, the extraction purity is high, the environmental pollution is reduced, the lead can be continuously utilized, the sustainable development is achieved, and the economic loss is reduced.

The invention discloses a lead-acid battery environment-friendly recycling device and a using method thereof. A recycling box for compressing and collecting lead-acid batteries is arranged on the table top of a workbench, a washing mechanism is arranged on the recycling box, a lead liquid collecting box for collecting lead liquid for washing the lead-acid batteries is arranged at the bottom of the workbench, a grinding cylinder for processing lead-acid battery waste is arranged on one side of the top of the recycling box, the output end of the grinding cylinder is connected with an iron powder collecting cavity, an output port of the iron powder collecting cavity communicates with a feeding port of the recycling box, a crushing cavity is formed in one side of the workbench, and a crushing roller set is arranged in the crushing cavity. Preliminary crushing in the lead-acid battery recycling process is achieved through the crushing cavity, preliminary crushing and decomposition of the lead-acid battery are achieved, crushed battery waste is further ground through the grinding cylinder, decomposition of ferrous materials in the battery waste is achieved, separation of lead liquid is achieved through water washing of the recycling box, and environment-friendly separation of the lead-acid batteries is realized.

The invention provides a neodymium-iron-boron rare earth permanent magnet waste regenerated magnet and a preparation method thereof. The neodymium-iron-boron rare earth permanent magnet waste regenerated magnet comprises main phase crystal grains formed by rare earth waste powder and an R-M alloy layer coating the surfaces of the main phase crystal grains. The preparation method comprises the steps that rare earth waste powder and R-M alloy powder are mixed to obtain mixed fine powder, the mixed fine powder is sequentially subjected to forming, sintering and heat treatment, and the neodymium iron boron rare earth permanent magnet waste regenerated magnet is obtained. According to the invention, the regenerated magnet is prepared by directly utilizing the waste through a short-process controllable preparation process, new materials do not need to be added, the recovery efficiency is greatly improved, the recovery cost is reduced, introduction of chemical reagents in the production process is omitted, the recovery process is more environmentally friendly, a large amount of Ce-containing waste is utilized, and the problem that a large amount of Ce-containing waste is overstocked at present is solved.

The invention provides a copper-sulfur separation inhibitor, a lime-free copper-sulfur flotation separation method and an application thereof, and relates to the technical field of mineral treatment. The copper-sulfur separation inhibitor comprises sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide raw materials, the copper-sulfur separation inhibitor prepared from the raw materials according to a specific dosage ratio has the characteristics of strong inhibition capability, good selectivity and the like, and a good inhibition effect can be achieved by using a small dosage in the copper-sulfur beneficiation process; the copper-sulfur separation inhibitor can replace a traditional lime inhibitor, environment-friendly and efficient recovery of copper-sulfur resources is achieved under the lime-free condition, and the defects that due to the fact that lime is adopted as the inhibitor, foam becomes sticky, the grade of copper concentrate is not high, pipelines and equipment are calcified and corroded, the pH value of tailing water is high, and the environment is polluted are overcome. The invention further provides the lime-free copper-sulfur flotation separation method. In the flotation process of the copper-sulfur raw ore, the specific copper-sulfur separation inhibitor and a collecting agent are adopted, so that efficient separation of copper and sulfur is achieved.