Abstract: A method for recovering lithium from a lithium-containing solution is provided. A lithium-containing solution with an adjusted pH value or an unadjusted pH value is mixed with a meta-aluminate, and the pH value is adjusted to weak acid/neutral, so that lithium can be separated from the lithium-containing solution in the form of a precipitate of LiaX·2Al(OH)3·nH2O. Then, the precipitate is converted into a lithium adsorbent of (1-m)LiaX·2Al(OH)3·nH2O and a LiaX-containing filtrate through desorption of lithium. High-purity Li2CO3 is obtained by performing precipitation of lithium on the LiaX-containing filtrate.

Abstract: The present disclosure provides a method for separating iron element in brine and application thereof. The method for separating iron element in brine comprises: adding a pH adjusting agent to brine, to adjust pH of the brine to 6.0-7.0, and controlling the temperature of the brine to 75° C.-90° C.; introducing an oxygen-containing gas into the brine, to covert the iron element in the brine into magnetic iron oxide; and separating the magnetic iron oxide from the brine by magnetic adsorption to obtain an iron-removed brine.

Abstract: A lithium adsorbent includes an aluminum-based adsorbing material, a binder, and a wetting and dispersing agent. The binder includes at least one of a vinylidene fluoride-chlorotrifluoroethylene (VDF-CTFE) copolymer and a fluoroolefin-vinyl ether copolymer. The wetting and dispersing agent includes one or more of polyethylene glycol, sodium polyacrylate, polyvinyl alcohol, and formaldehyde condensate.

Abstract: A lithium ion adsorbent includes a material having a chemical formula of LiCl·2Al(OH)3·nH2O. n is an integer from 1 to 3, a specific surface area of the lithium ion adsorbent is 20-36 m2/g, an average pore diameter of the lithium ion adsorbent is 20-35 nm, a total pore volume of the lithium ion adsorbent is 0.15-0.32 mL/g, a D10 of the lithium ion adsorbent is 3-12 ?m, a D50 of the lithium ion adsorbent is 12-22 ?m, and a D90 of the lithium ion adsorbent is 20-40 ?m.

Abstract: The present disclosure provides a method for extracting lithium from salt lake brine, which includes: flowing the salt lake brine through a lithium adsorbent at a varying flow rate to obtain a lithium-rich adsorbent, where the lithium ions in the salt lake brine are adsorbed on the lithium adsorbent, and where during the adsorption process, the flow rate of the salt lake brine decreases, and a difference between the initial flow rate and the final flow rate of the salt lake brine is 0.5-3 BV/h; washing the lithium-rich adsorbent; and desorbing the lithium ions from the washed lithium-rich adsorbent with a lithium ion eluent, to obtain a desorption solution.

Abstract: An energy supply system for salt lake lithium extraction comprises: a lithium extraction unit, a water source supply unit, a heating unit, a heat exchange unit, a steam supply unit, and a lithium extraction plant. The water source supply unit comprises a water storage tank and a first solid heat storage assembly. A second solid heat storage assembly of the heating unit is connected to the heat exchange unit, and is connected to the lithium extraction plant by means of a building heating water supply pipeline. The lithium extraction unit comprises an adsorption assembly, a membrane assembly, an evaporation assembly and a lithium precipitation assembly, and the water storage tank is connected to the adsorption assembly. A third solid heat storage assembly of the steam supply unit is connected to the evaporation assembly and the lithium precipitation assembly. The lithium extraction plant is connected to the heat exchange unit.

Abstract: The system of a raw brine treatment includes: an ion exchange adsorption unit, the ion exchange adsorption unit includes one or more adsorption columns, a part of raw brine to be treated is subjected to adsorption treatment in an adsorption process and subjected to desorption treatment with desorption water in a desorption process; a desorption water extraction unit, another part of the raw brine to be treated and/or a part of adsorption tail solution of the ion exchange adsorption unit enters the desorption water extraction unit, the desorption water extraction unit is configured to extract the desorption water from the raw brine and/or the adsorption tail solution that enters the desorption water extraction unit, and the desorption water extraction unit is connected with the ion exchange adsorption unit; and a recovery unit, the recovery unit is connected with the ion exchange adsorption unit and the desorption water extraction unit.

Abstract: A metal resin composite includes a metal substrate, a metal layer formed on a surface of the metal substrate, and a resin layer formed on the metal layer. A plurality of microcracks are formed at a surface of the metal layer.

Abstract: The present disclosure provides a method for separating iron element in brine and application thereof. The method for separating iron element in brine comprises: adding a pH adjusting agent to brine, to adjust pH of the brine to 6.0-7.0, and controlling the temperature of the brine to 75° C.-90° C.; introducing an oxygen-containing gas into the brine, to covert the iron element in the brine into magnetic iron oxide; and separating the magnetic iron oxide from the brine by magnetic adsorption to obtain an iron-removed brine.

Abstract: A recycling system includes a reaction kettle, a stirring device, and an electromagnetic device. The reaction kettle is provided with a liquid inlet, a gas inlet, a liquid outlet, and a slag discharge port. The stirring device is arranged on the reaction kettle. The stirring device includes a stirring rod and at least one stirring paddle. One end of the stirring rod extends into the reaction kettle, and the at least one stirring paddle is arranged on the end of the stirring rod. The electromagnetic device includes a first electromagnetic coil, and the first electromagnetic coil is wound on an outer circumferential surface of the reaction kettle. The arrangement of the stirring device allows the geothermal water to fully contact with the gas, which is conducive for the suspension of the ferroferric oxide in the geothermal water.

Abstract: The present disclosure provides a lithium extraction apparatus, which includes a frame and a transmission mesh belt. The transmission mesh belt includes water permeable holes, and is configured to carry an adsorbent. The frame includes an adsorption zone and a desorption zone along a traveling direction of the transmission mesh belt. A brine spraying device is disposed above the transmission mesh belt in adsorption zone. A desorbing liquid spraying device is disposed above the transmission mesh belt in the desorption zone, and a lithium extract collecting device is disposed below the transmission mesh belt in the desorption zone. The transmission mesh belt in the adsorption zone is folded into a multi-layer structure in the vertical direction; and/or the transmission mesh belt in the desorption zone is folded into a multi-layer structure in the vertical direction.

Abstract: The present disclosure provides a method for extracting lithium from salt lake brine, which includes: flowing the salt lake brine through a lithium adsorbent at a varying flow rate to obtain a lithium-rich adsorbent, where the lithium ions in the salt lake brine are adsorbed on the lithium adsorbent, and where during the adsorption process, the flow rate of the salt lake brine decreases, and a difference between the initial flow rate and the final flow rate of the salt lake brine is 0.5-3 BV/h; washing the lithium-rich adsorbent; and desorbing the lithium ions from the washed lithium-rich adsorbent with a lithium ion eluent, to obtain a desorption solution.

Abstract: A lithium adsorbent includes an aluminum-based adsorbing material, a binder, and a wetting and dispersing agent. The binder includes at least one of a vinylidene fluoride-chlorotrifluoroethylene (VDF-CTFE) copolymer and a fluoroolefin-vinyl ether copolymer. The wetting and dispersing agent includes one or more of polyethylene glycol, sodium polyacrylate, polyvinyl alcohol, and formaldehyde condensate.

Abstract: In order to resolve the problem that a magnetic lithium adsorbent in the related art is difficult to be used for lithium extraction from strong-alkaline and carbonate-type brines, a magnetic titanium-based lithium adsorbent is provided, which includes a magnetic composite and a lithium adsorption layer. The lithium adsorption layer is disposed at an outer surface of the magnetic composite. The magnetic composite includes a magnetic material and a titanium oxide. The lithium adsorption layer includes a lithium titanium oxide.

Abstract: A method for recovering lithium from a lithium-containing solution is provided. A lithium-containing solution with an adjusted pH value or an unadjusted pH value is mixed with a meta-aluminate, and the pH value is adjusted to weak acid/neutral, so that lithium can be separated from the lithium-containing solution in the form of a precipitate of LiaX·2Al(OH)3·nH2O. Then, the precipitate is converted into a lithium adsorbent of (1-m)LiaX·2Al(OH)3·nH2O and a LiaX-containing filtrate through desorption of lithium. High-purity Li2CO3 is obtained by performing precipitation of lithium on the LiaX-containing filtrate.

Abstract: A lithium ion adsorbent includes a material having a chemical formula of LiCl.2Al(OH)3.nH2O. n is an integer from 1 to 3, a specific surface area of the lithium ion adsorbent is 20-36 m2/g, an average pore diameter of the lithium ion adsorbent is 20-35 nm, a total pore volume of the lithium ion adsorbent is 0.15-0.32 mL/g, a D10 of the lithium ion adsorbent is 3-12 ?m, a D50 of the lithium ion adsorbent is 12-22 ?m, and a D90 of the lithium ion adsorbent is 20-40 ?m.

Abstract: This disclosure provides a system for coupling supercritical carbon dioxide cycle power generation and lithium extraction from brine. The system comprises an absorption heat pump unit, a supercritical carbon dioxide cycle power generation unit, and a unit for extracting lithium from brine. This system organically couples the exothermic characteristics of the supercritical carbon dioxide cycle system with the endothermic characteristics of the lithium extraction from brine system, and the waste heat is recycled in a cascade as the heat source in the lithium extraction from brine system, thereby effectively reducing the total energy consumption of power generation and lithium extraction and reduce the total equipment investment of the system, and significantly improving the efficiency of adsorption and lithium precipitation in the lithium extraction from brine system.

Abstract: A metal resin composite includes a metal substrate, a metal layer formed on a surface of the metal substrate, and a resin layer formed on the metal layer. A plurality of microcracks are formed at a surface of the metal layer.

Abstract: A heat dissipation substrate includes: a metal-ceramic composite board, where the metal-ceramic composite board is a metal layer wrapping a ceramic body; and a metal oxide layer integrated with the metal layer and formed in an area of at least a part on an outer surface of the metal layer; and a soldering area on which the metal oxide layer is not formed and that is used to connect with a copper substrate and bear a chip.

Abstract: A heat dissipation substrate includes: a metal-ceramic composite board, where the metal-ceramic composite board is a metal layer wrapping a ceramic body; a metal oxide layer integrated with the metal layer and formed on an outer surface of the metal layer; and a soldering metal layer formed on at least a part of an outer surface of the metal oxide layer, where the soldering metal layer is used to connect with a copper substrate and bear a chip.