63results about How to "Reduce entrainment loss" patented technology

The invention discloses a method and system for recovering lithium from a waste lithium iron phosphate battery. The method comprises the following steps that a positive plate is disassembled from thewaste lithium iron phosphate battery; a binder in the positive plate is removed, valuable metal elements in the positive plate are leached by an acid solution, and an acidified leaching solution is obtained; ultrafiltration treatment is carried out on the acidified leachate by using an ultrafiltration membrane; by using a nanofiltration membrane technology, lithium ions in the acidified leachate are separated from other cations different from lithium ions, a solution containing lithium and a solution containing other cations are obtained, and then a reverse osmosis technology is adopted for concentration and enrichment correspondingly, wherein the other cations comprise iron ions; and a lithium precipitant is adopted to precipitate and separate lithium ions in the lithium-containing solution, alkaline substances are adopted to precipitate and separate iron ions in the solution containing other cations, and lithium recovery is realized. According to the method and system, the ultrafiltration-nanofiltration-reverse-osmosis combined technology is adopted, and the method and system have the beneficial effects of simple process, environmental protection, less acid and alkali consumption, good and stable membrane separation effect and the like.

The invention discloses a method and system for recovering lithium and manganese from a waste lithium manganate battery. The method comprises the following steps that a positive plate is disassembledfrom the waste lithium manganate battery; a binder in the positive plate is removed, valuable metal elements in the positive plate are leached by acid dissolution, and acidified leachate is obtained;ultrafiltration treatment is carried out on the acidified leachate by using an ultrafiltration membrane; by using a nanofiltration membrane technology, lithium ions in the acidified leachate are separated from other cations different from lithium ions, a solution containing lithium and a solution containing other cations are obtained, and then a reverse osmosis technology is adopted for concentration and enrichment correspondingly, wherein the other cations comprise manganese ions; and a lithium precipitant is adopted to precipitate and separate lithium ions in the lithium-containing solution,and alkaline substances are adopted to precipitate and separate manganese ions in the solution containing other cations, so that the recovery of lithium and manganese is realized. According to the method and system, the ultrafiltration-nanofiltration-reverse osmosis combined technology is adopted, and the method and system have the beneficial effects of simple process, environmental protection, less acid and alkali consumption, good and stable membrane separation effect and the like.

The invention discloses a cleaning manufacturing method of phthalic acid dioctyl, which is characterized by the following: setting esterification and dealcoholization within one equipment; adopting benzoic anhydride and octanol as raw material at 1:2-3 weight percentage; utilizing titanic hydroxide four propyl ester as catalyst; setting addictive quantity at 0.0015%-0.005% in the total material; generating coarse ester in the autoclave under normal pressure; controlling reacting final temperature at 220-240 deg.c; flashing octanol through residual heat in the autoclave; dehydrating excess 60-80% octanol in the esterifying reaction; collecting sedimenting water after condensing; cooling temperature in the autoclave at 170-190 deg.c; inputting water at this temperature; distilling steam in the autoclave; removing residual octanol.

The invention discloses an ultrasonic synergetic crystal growing fruit juice freezing and concentrating method and an equipment thereof. A fruit juice storage tank of the equipment is connected with ascraper-type heat exchanger by a centrifugal pump, and the scraper-type heat exchanger and a centrifugal machine are positioned under a crystal growing tank with a heat preservation jacket and are connected with the crystal growing tank with the heat preservation jacket respectively; an energy converter is arranged in the crystal growing tank with the heat preservation jacket and connected with an ultrasonicator; and the centrifugal machine is connected with a collecting tank which is connected with the scraper-type heat exchanger by a pump. In respect of the method, clear fruit juice is obtained firstly and is pumped into the scraper-type heat exchanger for precooling. After the temperature of feed liquid in the scraper-type heat exchanger is reduced to freezing point and small ice crystals are generated, an agitating valve and an ultrasonic field generator in the crystal growing tank are started and concentrated solution is discharged and the ice crystals are separated after the icecrystals mature. In the invention, the ultrasonic synergetic effect greatly shortens time from core formation to maturing of ice crystals and the entrainment loss of active ingredients of fruit juiceis reduced, thus not only improving production efficiency but also meeting purpose of saving energy.

The invention discloses a method and a system for reversely preparing an aluminum doped ternary precursor. The method comprises the following steps of: disassembling a positive electrode sheet from awaste ternary lithium battery; Removing the binder in the positive electrode sheet, and then acid leaching the valuable metal elements in the positive electrode sheet to obtain an acidizing leaching solution; The acidified leachate was treated by ultrafiltration membrane. Using nanofiltration membrane technology, lithium ion in acidified leaching solution was separated from other cations differentfrom lithium ion, and then concentrated by reverse osmosis technology. A lithium ion is precipitate and precipitated by a lithium precipitant, and a nickel ion, a cobalt ion, a manganese ion and an aluminum ion are coprecipitate and precipitated by an alkaline substance to obtain an aluminum doped nickel cobalt manganese ternary precursor. The adoption of ultrafiltration-Nanofiltration The aluminum doped ternary precursor was directly synthesized by reverse osmosis combined with trace aluminum in acidification leaching solution. The process is simple and environmentally friendly, and the valuable elements are recycled comprehensively.

The invention discloses a longitudinal-axial-flow roller, and belongs to the technical field of combine harvester threshing separating devices. The longitudinal-axial-flow roller comprises a roller body, a roller front shaft, a power input shaft, a roller front support and a roller rear support. The roller body comprises a feeding-in part and a roller body part, and an anti-tangling element is arranged between the roller front support and the feeding-in part and comprises a guiding crescent moon, a wedge-shaped roller front cover, a roller front cover seal cover and roller front protrusions wherein the guiding crescent moon and the wedge-shaped roller front cover are fixed to the roller front support, the guiding crescent moon comprises a disc and a guiding plate, one end of the disc is fixedly installed on the roller front support, and an opening is formed in the other end of the disc. The disc penetrates through an installing hole in the roller front cover, the roller front cover seal cover is fixed to the roller front cover, and the roller front protrusions are fixed to the front end face of the feeding-in part and located inside the opening. In harvesting, the roller front shaft is not likely to be tangled with weeds, working efficiency is high, kinds of crops are harvested without replacing the roller, and the requirements for earnings of a user are met.

The invention relates to a liquid-liquid extraction mixer-settler and an extraction method and an application thereof. The mixer-settler comprises a mixing chamber and a clarifying chamber, wherein the side in the clarifying chamber near the mixing chamber is provided with a guide pipe which extends to the tail end of the clarifying chamber from an outlet of the mixing chamber; and at least the upper part or the lower part of the guide pipe in the clarifying chamber is transversely and fixedly provided with a wedge-shaped body. As the upper part and/or the lower part of the guide pipe in the clarifying chamber is fixedly provided with the wedge-shaped body, not only is the storage amount of organic phases in the settling chamber reduced, but also a large light-heavy two-phase settling area is provided so that the clarifying phase-splitting time is prolonged, and the clarifying separation effect is remarkable for an easily-emulsifying system or a system with larger viscosity; and the mixer-settler provided by the invention can be used for single-stage continuous extraction operation or multi-stage series-connected countercurrent continuous extraction operation.

The invention provides a method for removing calcium and magnesium from a bioleaching solution of nickel cobalt by a synergetic extraction method. The method comprises the following steps: homogeneous saponification is separately carried out for a nickel cobalt extractant Versatic10 and a synergic extractant Cynaex301 by using a NaOH solution, and saponification rate is 40-60%; an organic phase is composed of a combined extractant and a diluent Mextral DT100; the combined extractant comprises 20-40V% of the synergic extractant Cynaex301 and 80-60V% of the extractant Versatic; the volume of the combined extractant is 10-30% of the total volume of the organic phase; when an initial pH value is 1.5-3.0, the organic phase and the bioleaching solution of nickel cobalt are mixed with shaking, the pH value is controlled at 3.0-4.0 for balancing extraction, and after standing, the organic phase and the aqueous phase are separated; sulfuric acid is added into the organic phase for back extraction of nickel cobalt, so that effective separation between nickel cobalt as well as calcium and magnesium is realized.

The invention provides a leaching method of low-grade copper oxide mud ore, which comprises the following process steps: concentration, leaching, washing, settling separation, dilution, clarification separating, and the like. Therefore, the leaching of low-grade refractory copper oxide ore with high mud content is realized; reliable raw material guarantee is provided for subsequent extraction of valuable elements; not only resources are integrated and valuable elements in resources are fully recovered, but also the invention has a high leaching rate, a short leaching period, and less tailing entrainment; the overflow is returned for recycle during the leaching process; the leached solid residues are neutralized with tailing slurry discharged by concentrators, and then are stored in tailing reservoirs, so no pollutant is discharged outwards, which facilitates environmental protection; additionally, the invention also has the advantages of investment saving, low operation cost, low labor intensity, and high productivity.

The invention discloses a track self-running type cutting longitudinal flow full-feeding combine harvester. A threshing rotary drum assembly comprises an arch tooth cutting flow threshing barrel and a nail tooth longitudinal axial flow threshing rotary drum; the arch tooth cutting flow threshing barrel is radially arranged at the front part of a stander (3); and the nail tooth longitudinal axial flow threshing rotary drum is axially arranged at the rear part of the stander (3). The track self-running type cutting longitudinal flow full-feeding combine harvester is high in threshing performance, small in entrainment amount and low in seed breakage rate; and furthermore, the track self-running type cutting longitudinal flow full-feeding combine harvester can smoothly and efficiently run in long-straw and high-yield difficultly threshed grain fields without being blocked.

The invention provides a method for preparing cyclopentadiene through gas-phase depolymerization of dicyclopentadiene. According to the method, a depolymerizing device is in subsection series connection design and subjected to subsection temperature control; on one hand, the depolymerization time is shortened, and the coking possibility is reduced, so that the service life of the depolymerizing device is prolonged to the maximum, and the depolymerization energy consumption is also reduced by adopting the method provided by the invention; and on the other hand, the DCPD depolymerization rate and CPD yield are further improved by adopting the method provided by the invention and respectively reach 99.9% and 99.5%, especially the CPD yield is also improved by 5% under the condition that the life is prolonged compared with the prior art, and the service life of the depolymerizing device is prolonged to be more than 1200h.

The invention discloses a secondary separation mechanism of a harvester. The secondary separation mechanism of a harvester comprises a roller, a vibrating screen, a straw feeding plate, a supporting plate, a separation tube and a feeding opening, wherein the vibrating screen is arranged on the outer wall of the bottom end of the roller; the straw feeding plate is arranged in a position, positionedon the outer wall of the vibrating screen, of the roller;; the supporting plate is connected onto the outer wall of the bottom end of the straw feeding plate through screw bolts; the separation tubeis rotationally arranged on the outer wall of one side of the roller; the feeding opening is formed in the outer wall of the bottom end of the separation cylinder; one end of the straw feeding plate is inserted into and connected with the inside of the feeding opening; and the roller and the separation tube are in a cylindrical shape. The secondary separation mechanism of the harvester is used forperforming secondary separation on grain particles and rice and wheat straws when the harvester is used for harvesting rice or wheats, so that the grains and the straws can be more cleanly separated;the retention rate is improved; the entrainment loss of grains is reduced; in addition, the structure is simple; the operation efficiency is high; the grain and straw separation effect is good, so that the grain waste is reduced; and the economic benefits of farmers are increased.

The invention belongs to the technical field of salt lake brine resource utilization. The invention provides a method for extracting lithium from salt lake brine with a high magnesium-lithium ratio. The method mainly comprises the steps: by taking magnesium in brine as a raw material, adding an aluminum source and a precipitant, precipitating magnesium and aluminum into layered double hydroxides (MgAl-LDHs), filtering and separating, reserving lithium ions in filtrate, concentrating or performing ion selective adsorption to enrich lithium, precipitating lithium with carbonate ions, and thus obtaining lithium carbonate. The chemical general formula of the obtained layered double hydroxides (MgAl-LDHs) is Mg[1-x]Al[x](OH)[2](A<n->[x/n]).yH[2]O, and the ratio of Mg<2+> to Al<3+>of LDHs can beadjusted within a certain range according to application requirements, so that the chemical composition of LDHs is changed, and the chemical properties and the charge density of laminates are furthermodulated to adapt to new applications. The method has the advantages that the obtained LDHs are magnesium-based functional materials while lithium extraction of the salt lake brine with the high magnesium-lithium ratio is achieved, the method is widely applied to the aspects of flame retardance, wastewater treatment, soil remediation and the like, and comprehensive utilization of brine resourcescan be achieved. The method is short in technological process, easy to operate and good in magnesium-lithium separation effect, magnesium resources can be fully utilized while lithium is extracted, and the magnesium damage problem of the salt lake can be well solved.