42results about How to "Applicable recycling" patented technology

The invention provides an integral recycling method of a lithium iron phosphate positive electrode material. The integral recycling method comprises the steps of (1) preparing paste from the lithium iron phosphate positive electrode material, mixing the paste and an acid for leaching reaction, and performing liquid-solid separation to obtain a leaching liquid and residue; (2) adjusting a pH valueof the leaching liquid to 1.5-3, and performing solid-liquid separation to obtain iron phosphate and a deironing acid liquid; (3) adjusting a pH value of the deironing acid liquid to 5-8, and performing solid-liquid separation to obtain a precipitant of aluminum and iron and a lithium-containing purification liquid; and (4) and performing post-treatment on the purification liquid to obtain a lithium product and a precipitation mother liquid. By the method, the recycling rates of lithium, iron and phosphate all are larger than 95wt%, the purity of the obtained lithium carbonate product is larger than 98.5wt%, the impurity content conforms to the requirement of GB/T11075-2013, the iron phosphate product conforms to the quality requirement (HG/T 4701-2014) of battery-level iron phosphate, theresidue discharging quantity is reduced by 85wt%, the flow is simple, and the process is clean.

The invention discloses a preparation method of a BPPO (Brominated Polystyrene) and PVA (Polyvinyl Alcohol)-based organic-inorganic hybrid anion exchange membrane. The preparation method comprises the following steps: (1), dissolving the BPPO in chlorobenzene, and adding DMF (Dimethyl Formamide), tertiary amine solution, two micromolecule alkoxy silanes and water so as to obtain BPPO (+)/SiO2 materials; (2) dissolving the obtained BPPO (+)/SiO2 materials into DMF mixed solution so as to BPPO (+)/SiO2 solution; (3) dropping the BPPO (+)/SiO2 solution into PVA solution so as to prepare coating liquid; and (4) coating the coating liquid on a basal body so as to form a diaphragm, and drying the diaphragm to obtain the organic-inorganic hybrid anion exchange membrane. According to the invention, quaternary ammonium BPPO, PVA and micromolecule alkoxy silanes are utilized to prepare the hybrid anion exchange membrane containing the quaternary ammonium group and-OH base, the content of the PVA in the membrane can be controlled, and a cross-linked structure can be formed, so that the stability and mechanical performance of the membrane can be reinforced; and moreover, the -OH base in the PVA can promote the H+ ion to transfer, so that the prepared hybrid anion exchange membrane is particularly suitable for diffusion dialysis process, and can separate and recycle acid waste liquid.

The invention relates to a method for preparing titanium-rich material from titanium-containing slag, comprising the following steps: 1. carrying out ball-milling on titanium-containing slag, then adding Na2CO3 or NaOH and mixing evenly; 2. carrying out calcination on the mixture obtained in step 1, then adding HC1 solution for leaching; 3. filtering the leached solution, concentrating and then recycling the filtrate; 4. calcining the filter residue to obtain titanium-rich material with grade of TiO2 being more than 90%.In the invention, Na2CO3, NaHCO3 or NaOH are added into the titanium-containing slag, then SiO2, Al203 in the slag are converted into NaSiO3 and NaAlO2 which are later leached by HC1 solution, so that SiO2, Al2O3 and MgO which are not converted are leached into the solution and grade of TiO2 in leached slag is improved by a big margin. The technique of the invention features simple method, convenient operation, environmental-friendliness, good economic benefits, high level of resource utilization and adaptability to industrialized production; in addition, the technique is especially suitable for recovering titanium in titanium-containing slag produced by the direct iron process.

The invention relates to a method for recovering triethylamine from an aqueous solution. the method comprises the following steps: adjusting pH value of a triethylamine aqueous solution system to 1 by the use of hydrochloric acid, extracting triethylamine by the use of cyclohexane, adjusting pH value to more than 12 by the use of sodium hydroxide, carrying out backflow and water division after division of an alkaline water layer until there is no obvious moisture, carrying out atmospheric distillation, distilling to obtain high-purity triethylamine, and recovering cyclohexane. The method has advantages of simple operation, high efficiency and less environment stress, and is suitable for recovery of a triethylamine aqueous solution with the concentration of 5-50%.

The invention discloses a separating and recovering device for a needle and a syringe cylinder of an injection syringe. The device comprises a casing, a supporting plate, a separating base, a pushing base, a separating cutter, a U-shaped positioning sleeve, a baffle rod, a connecting plate, a limiting plate and a pushing rod; a casing cavity of the casing is divided into a syringe cylinder cavity and a needle cavity; the supporting plate is arranged at the upper end of the needle cavity and provided with a guide hole; the separating base is arranged on the supporting plate and provided with a needle hole and a separating hole; the pushing base is arranged on the supporting plate; the separating cutter is arranged at the left end of the pushing base and is exactly opposite to the separating hole; the U-shaped positioning sleeve is located above the separating base; the front end of the baffle rod is hinged to the left end of the front side wall of the U-shaped positioning sleeve; the connecting plate is fixed to the pushing base; the limiting plate is fixed to the connecting plate; the rear end of the baffle rod is supported at the left portion of the limiting plate, and the limiting plate is provided with a falling port; the pushing rod is fixed to the connecting plate and is higher than the U-shaped positioning sleeve. The device can automatically separate the needle of the injection syringe from the syringe cylinder and directly store the needle and the syringe cylinder separately, so that the labor amount of medical staff is reduced, and the safety of the separation process is improved.

The invention relates to the field of liquefying equipment, and provides a BOG recovery system for an LNG (Liquefied Natural Gas) gas station. The BOG reclaiming system comprises a BOG introduction pipeline, a compressor, a cooler, an ejector and an LNG discharging pipeline, wherein the BOG introduction pipeline, the compressor, the cooler, the ejector and the LNG discharging pipeline are sequentially communicated with one another. The BOG in an LNG storage tank enters the compressor through the BOG introduction pipeline and is pressurized to about 20MPa, the pressurized BOG is cooled by the cooler and enters the ejector to perform ejection liquefaction, and finally, the obtained LNG is introduced into a storage device as products. Through the adoption of the BOG recovery system disclosed by the invention, the BOG generated in the LNG storage tank can be re-liquefied, and the re-liquefied BOG can be introduced into the LNG storage tank or other containers so as to be sufficiently utilized, and the air pollution and the waste of energy sources can be avoided. The BOG recovery system is suitable for LNG gas stations.

The invention discloses a production method for separating silver from silver-containing waste liquid. In the method, firstly, the silver-containing waste liquid is complexed with ammonia water and then filtered, and the hydroxide of inert metal ions is precipitated and removed to obtain silver ammonium solution, and then Use hydrazine hydrate to reduce the silver ammonium solution to obtain silver powder, and finally separate the supernatant, wash the silver powder with pure water several times, filter and dry to obtain silver powder with a purity greater than 98%. The invention only needs a small amount of plastic containers and filter cloth, does not need to invest in complicated equipment, only needs two reagents of ammonia water and hydrazine hydrate, does not need to introduce other base metals, and does not use halides to precipitate silver, and can complete the removal of silver and other metal impurities. Separation, the excess reducing agent added can be removed by washing to obtain higher purity silver powder. The invention has the advantages of low cost, simple operation and high efficiency, and is suitable for recovering and purifying silver in silver-containing waste liquid with a silver concentration greater than 0.1 g/ml, and the separated silver has high purity.

The invention relates to a method for effectively selecting lead with high-enriched fineness. The method is characterized in that under a condition of one-stage grinding, green ore is sent into a spiral classifier for classification after the green ore is subjected to ball milling through a ball miller; ore slurry overflowing from the spiral classifier is sent into a whirlcone for classifying; the ore slurry with qualified fineness overflowing from the whirlcone is sent into a thickener for concentrating, and is sent into a flotation washer for lead selection. When the method is adopted to carry out floatation on lead-zinc sulphide ore, the recovery rate of lead selection is improved by 2 percentage, the lead concentrate grade is improved by 2 percentage, the recovery rate of silver in lead is improved by 5 percentage, the flotation energy consumption is reduced by 20 percent, and medicaments for lead selection are reduced by 15 percent. The method not only can greatly improve lead dressing index, and save electricity consumption of lead dressing and medicament consumption, but also can realize quick cyclic utilization of lead dressing wastewater and partial lead dressing medicament, prevent pollution to the environment, and finally realize high efficiency separation and clean production of lead dressing. The method is also applicable to multiple-metal reclamation of other sulfide ores.

The invention relates to a method for recovering pyridine from an aqueous solution. The method comprises the following steps: adjusting the pH value of a pyridine aqueous solution system to 1 by using hydrochloric acid; extracting pyridine by using cyclohexane and then adjusting the pH value to more than 12 by using sodium hydroxide; after an alkaline water layer is separated, carrying out reflux and water separation until there is no obvious water and then carrying out normal pressure rectification; and finally, carrying out distillation so as to obtain high-purity pyridine and recovering cyclohexane. The method provided by the invention has the advantages of simple operation, high efficiency, small environment stress and applicability to recovery of an aqueous pyridine solution with a concentration of 5 to 48%.

The invention discloses a beneficiation method for recovering molybdenum from a tungsten tin associated sulfide ore bulk concentrate. The beneficiation method is characterized by comprising the following steps: after the heating reagent removal is performed for a sulfide ore bulk concentrate obtained from a tungsten tin associated sulfide ore; water is added for mixing pulp; quicklime is added for stirring to adjust the pulp; an inhibitor and a collecting agent are added for primary roughing to obtain a primary roughing concentrate and a primary roughing tailing; the collecting agent is added in the primary roughing tailing for secondary selection to obtain a secondary selection concentrate and a secondary selection tailing; and three times of blank selection are performed for the secondary selection concentrate to obtain a molybdenum concentrate. The method obtains the molybdenum concentrate with a molybdenum grade of 48-52% and a molybdenum recovery rate of 87-93%, reduces the molybdenum selection cost, generates no waste water and other substances harmful to the environment, and is an environment-friendly beneficiation method. The method is suitable for recovering molybdenum from the tungsten tin associated sulfide ore bulk concentrate.

The invention discloses an old- regenerating method of print cartridge in the ink-ejecting printer, which adapts high-pressure hot air to blow and wash the old hollow print cartridge through scouring agent. The method improves the utility of old print cartridge greatly, which possesses high effective economical character.

A deployment and recovery device of a flight suspension type underwater glider comprises a frame structure. A controller is mounted in the middle of the top surface of the rack, a camera is mounted under the controller, a plurality of motor folding brackets are uniformly spaced apart from each other in the circumferential direction of the outer ring of the controller, the head of each electric motor folding support frame is fixed with a rotating electric machine, the output end of the rotating electric machine is installed with a propeller fixing plate, the propeller is installed on the propeller fixing plate, the head of each electric motor folding support frame is also fixed with a cross-shaped conduit fixing frame, and a circular conduit is installed on the outside of the conduit fixingframe; a battery box fixing seat is also installed on the inner side of the rack, a battery is installed on the inner side of the battery box fixing seat, a self-clamping catch device is symmetrically installed on the bottom of the rack, and two self-clamping catch devices grasp the glider; air bags are installed at both ends of the bottom of the frame. The device is flexible and reliable to use.

The invention discloses a recovery process of dilute sulfuric acid in industrial wastewater. The process comprises the steps: adding a polyamino compound-containing toluene extract to the dilute sulfuric acid-containing industrial wastewater, performing stirring and still standing, separating the toluene extract, adding an aldehyde group-containing compound and deionized water to the separated toluene extract, performing stirring and still standing, performing separation so as to obtain a Schiff base compound-containing toluene solution and a sulfuric acid aqueous solution, and then recyclingintermediate products by using copper chloride, deionized water, sodium hydroxide and other substances. The recovery process has large universality for to-be-treated dilute sulfuric acid solutions andconcentrations of the to-be-treated dilute sulfuric acid solutions, and is suitable for general recovery of sulfuric acid in wastewater which contains dilute sulfuric acid with different concentrations; and the adopted reagents and the generated by-products in the entire process can be recycled basically, sulfuric acid is precipitated through a room-temperature reaction between the aldehyde group-containing compound and the polyamino compound-containing sulfate solution so that side effects caused by high-temperature reactions can be avoided, and no easy damage to equipment and high safety are achieved.

the invention belongs to the technical field of offshore wind power foundation recovery and discloses a four-drum fan foundation recovery construction method. The method comprises the steps of injecting water into and pressurizing three drums to allow a whole fan foundation to be inclined to another drum, releasing water pressure of the three drums, repeating the operation to allow the four drumsto be inclined sequentially, injecting the water into and pressurizing the four drums simultaneously to raise the drum foundation, stopping water injection after the drum foundation rises to certain required height from the initial height, inflating the four drums simultaneously to continue raising the drum foundation, after an inflating amount meets a design requirement, waiting the drum foundation to rise to the water surface if the drum foundation continues rising, raising the drum foundation to the water surface through an uplift force of a lifting rope if the drum foundation does not continue rising, and accomplishing recovery work of the four-drum fan foundation. The method achieves integrated recovery of the foundation and a fan, and is high in construction economical efficiency andshort in construction period, and large construction equipment is not required.

The invention belongs to the technical field of offshore wind power foundation recycling, and discloses a three-cylinder fan foundation recycling construction method. The method comprises the steps that the manner of conducting water injection pressurization on two single cylinders is adopted to enable a whole fan foundation to incline to the direction of another single cylinder, and then water pressure of the two single cylinders is released; the first is repeatedly conducted till the three single cylinders incline sequentially, water is simultaneously injected into the three single cylindersfor pressurization, and then the cylinder-type foundation is lifted; after the cylinder-type foundation is lifted to a certain height from the initial height, water injection is stopped, and air inflation is simultaneously conducted on the three single cylinders to enable the cylinder-type foundation is continuously lifted; after the air inflation amount meets the design requirement, if the cylinder-type foundation is kept lifting continuously, and then the cylinder-type foundation is lifted to the water surface; and if the cylinder-type foundation does not continuously lift, the cylinder-type foundation is lifted to the water surface through the up-pulling force of lifting ropes, and then recycling work of the three-cylinder fan foundation is completed. According to the three-cylinder fan foundation recycling construction method, integrated recycling of the foundation and a fan is achieved, and large construction equipment is not needed; and meanwhile, the construction economic efficiency is good, and the construction period is short.