48761results about "Process efficiency improvement" patented technology

The invention provides a comprehensive recovering method of waste lithium iron phosphate batteries, which has simple and reasonable process, low recovering cost and high added value. The method comprises the following steps: utilizing an organic solvent to dissolve an adhesive on battery cell fragments, and realizing the separation of lithium iron phosphate material and clean aluminum and copper foils through screening, wherein the aluminum and copper foils are recovered by smelting; utilizing a NaOH solution to remove residual aluminum foil scraps in the lithium iron phosphate material, and removing graphite and remaining adhesive by heat treatment; after dissolving the lithium iron phosphate with acid, utilizing sodium sulphide to remove copper ions, and utilizing the NaOH solution or ammonia solution to allow iron, lithium and phosphorus ions in the solution to generate sediments; adding iron source, lithium source or phosphorus source compounds to adjust the molar ratio of iron, lithium and phosphorus; and finally adding a carbon source, and obtaining a lithium iron phosphate cathode material through ball milling and calcination in inert atmosphere. After the treatment of the steps, the recovery rate of valuable metals in the batteries is more than 95%, and the comprehensive recovery rate of the lithium iron phosphate cathode material is more than 90%.

Use of a Maillard reaction product as an adjuvant in a variety of applications including solid-liquid separations, corrosion inhibition, emulsification, dust suppression, slow release fertilization, viscosity modification and others and especially as a depressant or collector in separation processes, including the selective separation of solids and/or ionic species from aqueous media, such as in the process of froth flotation.

Methods for carrying out high temperature reactions such as biomass pyrolysis or gasification using solar energy. The biomass particles are rapidly heated in a solar thermal entrainment reactor. The residence time of the particles in the reactor can be 5 seconds or less. The biomass particles may be directly or indirectly heated depending on the reactor design. Metal oxide particles can be fed into the reactor concurrently with the biomass particles, allowing carbothermic reduction of the metal oxide particles by biomass pyrolysis products. The reduced metal oxide particles can be reacted with steam to produce hydrogen in a subsequent process step.

The present invention relates to adsorption process of extracting lithium from salt lake brine, and the process is suitable for producing lithium carbonate and lithium chloride with lithium-containing Qinghai saline lake brine, including concentrated lithium-containing Qinghai saline lake brine. The process includes sun shining saline lake brine to obtain concentrated lithium containing brine, adsorption of lithium ion with aluminum salt adsorbent, eluting adsorbed lithium ion with water, and refining and concentrating the elutriant to obtain material for preparing lithium carbonate and lithium chloride.

The invention relates to a method for recovering rare earth from rare earth-containing aluminum-silicon materials, which comprises the following steps: taking the rare earth-containing aluminum-silicon materials including rare earth-loaded molecular sieves, catalyst wastes, and the like as raw materials, conducting prioritized selective leaching by acid so as to lead the majority of the rare earth and a small amount of aluminum to be dissolved and separated from silicon and other impurities, leading the rare earth to form precipitates and be separated from the aluminum by adopting a double salt precipitation or oxalate precipitation method, and then recovering and purifying the rare earth. The method has the advantages of directly realizing the extraction of the rare earth from the aluminum-silicon materials including the molecular sieves and the like, with over 98% purity of the obtained rare earth, and avoiding impurities such as aluminum, silicon and the like entering the rare earth; and meanwhile, the technology also has the characteristics of little fixed investment, low production cost and easiness for realizing industrialized production.

A process for leaching a value metal from a base metal sulfide ore, comprising the step of leaching the ore with a lixiviant comprising a chloride, an oxidant and hydrochloric acid is disclosed. The leaching is controlled, by use of low concentrations of hydrochloric acid and a redox potential, to effect formation of hydrogen sulfide from the base metal sulfide ore. The hydrogen sulfide is stripped from the leach solution, thereby reducing the amount of sulfate generated in the leach to very low levels. The leaching may also be conducted to limit the co-dissolution of platinum group metals and gold with the base value metals. The leach forms a value metal-rich leachate and a solids residue. The solids residue may be subsequently leached to recover the platinum group metals and gold. The value metal-rich leachate can be is oxidized and neutralized to recover the value base metals. In an embodiment, the chloride is magnesium chloride and lixiviant solution is regenerated.

A process for the production of metal nanoparticles. Nanoparticles are formed by combining a metal compound with a solution that comprises a polyol and a substance that is capable of being adsorbed on the nanoparticles. The nanoparticles are precipitated by adding a nanoparticle-precipitating liquid in a sufficient amount to precipitate at least a substantial portion of the nanoparticles and of a protic solvent in a sufficient amount to improve the separation of the nanoparticles from the liquid phase.

The invention discloses a method of vanadium slag direct entering high temperature roasting furnace calcify roasting, that is, high calcium vanadium slag or ordinary vanadium slag and lime or limestone are mixed uniformly without the gradual heating up process from low temperature to high temperature, the mixture enters into the roasting furnace of more than 600 DEG C for calcified roasting., the vanadium of the vanadium slag is changed into vanadium acid calcium, vanadium of the roasting clinker is dissolved into the solution under the leaching function of sulphuric acid solution, vanadium oxide and the like vanadium products are further made. The invention needs no gradual heating up process from low temperature to high temperature of the prior sodium treatment roasting, thereby reducing roasting time, improving productivity of unit and reducing production cost.

The invention discloses a method for comprehensively recycling valuable metals from a spent lithium ion battery. The method comprises the following steps: carrying out electric discharge treatment on a spent battery, crushing, pre-roasting at 300-400 DEG C, adding a reducing agent, and carrying out reduction roasting at 450-700 DEG C; carrying out water extraction and evaporative crystallization on fine aggregates obtained through the reduction roasting, so as to obtain a high-purity lithium product, leaching copper, nickel and cobalt from leached slag and roasted lump materials by virtue of ammonia oxide, carrying out magnetic separation and sieving on ammonia leaching slag so as to obtain iron and aluminum enriched products, and carrying out reduction acid leaching, purification and edulcoration on sieved products, so as to obtain a high-purity manganese sulfate solution; and carrying out extraction and selective reverse extraction on ammonia leaching liquid, so as to obtain a high-purity nickel sulfate solution and a high-purity copper sulfate solution, and carrying out vulcanization cobalt precipitation, oxidation acid leaching and extraction purification on raffinate, so as to obtain a high-purity cobalt sulfate solution. The method is high in extraction rate of valuable metals and applicable to the treatment of multiple waste lithium ion battery raw materials and efficient utilization of multiple elements, and sorting is not required.

Systems and methods for fabricating multi-functional articles comprised of additively formed gradient materials are provided. The fabrication of multi-functional articles using the additive deposition of gradient alloys represents a paradigm shift from the traditional way that metal alloys and metal/metal alloy parts are fabricated. Since a gradient alloy that transitions from one metal to a different metal cannot be fabricated through any conventional metallurgy techniques, the technique presents many applications. Moreover, the embodiments described identify a broad range of properties and applications.

The invention relates to a method for recycling valuable metal from a waste nickel-cobalt-manganese lithium ion battery. The method comprises the following steps of: dismounting, discharging and crushing the battery, soaking crushed waste nickel-cobalt-manganese lithium ions into sulfuric acid with certain concentration, adding a reducing agent to strip positive and negative pole pieces, and leaching valuable metals of nickel, cobalt, manganese and lithium; and replacing leach liquor with iron powder to remove copper, carrying out hydrolyzing to remove iron and aluminum, and dosing an impurity-removed solution to synthesize an aluminum coated nickel, cobalt and manganese ternary positive electrode material precursor, evaporating and concentrating the synthesized solution, adding carbonateor introducing carbon dioxide to recycle lithium. According to the method disclosed by the invention, stripping and leaching are synchronously completed, chemical precipitation is performed to removecopper, iron and aluminum, slag amount is small, slag filter performances are good, and the impurity-removed solution is used for synthesizing the aluminum coated nickel, cobalt and manganese ternaryprecursor, so that the recovery rate of valuable metal is increased; and the recovery rate for nickel, cobalt and manganese is 96% or higher in the whole process, the total recovery rate of lithium is90% or higher, the technological process is short, operation is simple, equipment is less, and the cost is low.

The invention relates to a method for recovering and preparing lithium cobalt oxide by using a disused lithium battery, belonging to the technical field of recovery and recycle of electrode materials.The method comprises the steps of: discharging, disassembling, smashing, NMP processing and burning a disused lithium battery sequentially, to obtain a disused LiCoO2 material; ball-milling the disused LiCoO2 material and adding natural organic acid and hydrogen peroxide to obtain a solution of Li<+> and Co<2+>; adding lithium salt or cobalt salt after filtering, and then heating by water bath; dropwise adding ammonia water in the solution to prepare a xerogel; and performing secondary burning to obtain an electrode material of lithium cobalt oxide. The method has the advantages that the electrochemical properties of the electrode material of the disused lithium battery can be recycled with obvious effect as well as simple and easy operation; the natural organic acid used in the process of acid dipping has small damage to apparatus; and the method is environment friendly and efficient, and has low cost, simple technique, high recovery rate and industrialized promotion.

A device for submerging scrap metal includes: (a) a drive source, (b) a drive shaft having a first end and a second end, the first end being connected to the drive source, and (d) an impeller connected to the second end of the drive shaft, the impeller preferably having two or more outwardly-extending blades. Preferably, each of the blades has a portion that directs molten metal at least partially downward. The impeller design leads to lower operating speeds, lower vibration, longer component life and less maintenance. Additionally, the impeller preferably has a connective portion. The connective portion is used to connect the impeller to the shaft and preferably comprises a nonthreaded, tapered bore extending through the impeller.

Molten iron is prepared by (1) providing iron oxide and a carbonaceous reducing agent, (2) preparing a shaped product from the carbonaceous reducing agent and the iron oxide, (3) preparing solid reduced iron from the shaped product, wherein the solid reduced iron has a metallization of at least 60%, a specific gravity of at least 1.7, and a carbon content of at least 50% of the theoretical amount required for reducing the iron oxide remaining in the solid reduced iron, and, (4) before substantial cooling occurs, heating the solid reduced iron in an arc heating-type melting furnace at a high temperature. The molten iron can be prepared efficiently from iron ores of relatively low iron content without causing erosion of refractories, at high energy and high reduction efficiencies, and by a simple operation in a simple facility.

The process of this invention is directed to the removal of metals from an unsupported spent catalyst. The catalyst is subjected to leaching reactions. Vanadium is removed as a precipitate, while a solution comprising molybdenum and nickel is subjected to further extraction steps for the removal of these metals. Molybdenum may alternately be removed through precipitation.

The invention relates to a method for recycling iron on line from iron-containing industrial slag and preparing a glass ceramics frit, belonging to the technical field of resource comprehensive utilization and material preparation and mainly comprising a two-step method process of iron-containing industrial slag online rough adjustment and modification for reducing iron and fine adjustment and modification for preparing the frit. The method comprises the steps of: discharging high-temperature iron-containing slag into a high-temperature furnace device, and simultaneously adding a reducing agent and a modifying agent to ensure that slag components are adjusted to reach the optimal component point in which iron oxide is reduced; after fully reacted, separating reduced molten iron from the slag, and recycling to obtain high-temperature molten iron; further adding a modifying agent and an adjusting agent into the slag remained after the separation to ensure that the slag components are adjusted to achieve the quality requirement of slag glass ceramics on the frit; and water-hardening, drying and grading the qualified slag to prepare the glass ceramics frit. The invention realizes multiple purposes that the heat of the slag is directly utilized and metal iron is recycled to prepare a high addition value product as well as solid wastes are massively utilized, and the like.

The invention provides a method for recovering valuable metal from waste nickel cobalt lithium manganate batteries and positive pole materials made of the valuable metal and belongs to the technical field of waste power battery recovery. The method can solve the problems in the existing recovery method that proportions of nickel, cobalt and manganese in the waste nickel cobalt lithium manganate batteries are different and corresponding metal is required to be added in recovery steps so as to adjust content of nickel, cobalt and manganese to reach required proportions. In the recovering method, by screening the positive pole materials of all nickel cobalt lithium manganate batteries from the waste nickel cobalt lithium manganate batteries and using the positive pole materials as recovery raw materials of the waste nickel cobalt lithium manganate batteries with the same positive pole materials, nickel cobalt manganate composite carbonate capable of being applied to preparation of the positive pole materials of lithium ion batteries directly without adjusting the proportion of nickel, cobalt and manganese is obtain.