265 results about "Scandium" patented technology

The invention provides a method for providing composite luminescent particles, comprising: (a) providing (i) a luminescent material, comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor, wherein A comprises one or more of yttrium, lutetium, gadolinium, lanthanum; B comprises one or more rare earth elements; C comprises one or more of aluminum, gallium, and scandium; D comprises one or more transition metal ions; and wherein 0≤x≤1, 0≤y≤1, and x+y>0; and (ii) further providing a precursor of an oxide material, wherein said oxide material has a melting point of at least 850°C; (b) mixing said (i) luminescent material comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor and (ii) said precursor of an oxide material; (c) curing said precursor of said oxide material to obtain a cured particle, said cured particle comprising said luminescent material, and a coating of said oxide material; (d) heating said cured particle at a first temperature for a first duration, wherein said first temperature is 600 °C or higher, wherein said first duration is 10 minutes or more; and (e) heating said cured particle under a reducing atmosphere comprising carbon monoxide at a second temperature for a second duration, wherein said second temperature is 700 °C or higher, and wherein said second duration is 1 hour or more.

The invention provides an improved treatment method for laterite-nickel ore. The improved treatment method comprises the following steps: S1, carrying out acid leaching on the laterite-nickel ore, and then filtering and washing to obtain a leached solution and first leached residues; step S2, the step S2 is selected from any one of a step S2-1, a step S2-2 and a step S2-3; s3, performing first-stage nickel and cobalt precipitation and dense filtration on the aluminum and scandium removed liquid or the iron and aluminum removed liquid by adopting a precipitator to obtain first-stage nickel and cobalt precipitation liquid and a nickel cobalt hydroxide product; and S4, carrying out second-stage nickel-cobalt precipitation on the first-stage nickel-cobalt precipitation solution by adopting a nickel-cobalt precipitation neutralizer and an oxidizing agent to obtain a magnesium sulfate manganese solution and nickel-cobalt-manganese slurry. In the traditional process, ferrous iron is oxidized by using compressed air, so that energy is wasted. According to the method, the manganese-containing substance is adopted as the oxidizing agent, ferrous iron is oxidized into ferric iron, the problems that the ferrous iron is low in oxidation rate under the low pH and compressed air is wasted are solved, and the scandium recovery rate is increased.

The invention relates to the technical field of metal materials, and discloses a light high-strength zinc alloy and a preparation method and application thereof.The zinc alloy takes aluminum and magnesium as main alloy elements, scandium-yttrium pre-alloying components, cerium-lanthanum composite rare earth and a nano TiB2 particle reinforced phase are introduced, and grain refinement and interface strengthening are achieved through the synergistic effect of multiple components; the preparation method comprises the key processes of pre-alloy smelting, dynamic magnetic field assisted die casting, gradient aging treatment and the like, and the defects of melt oxidation and solidification are effectively controlled. The zinc alloy has low density, high specific strength, corrosion resistance and excellent surface treatment adaptability, is suitable for manufacturing of precise metal fasteners such as belt buckles, belt buckles and shoe buckles, can remarkably improve the anti-fatigue performance and appearance quality of products, meanwhile, reduces processing energy consumption and material loss, and meets the market requirements of light-weight and high-end hardware fittings.

The invention belongs to the field of hydrometallurgy, and particularly relates to a method for extracting niobium and / or scandium in a phosphoric acid solution system, which is characterized in that the phosphoric acid solution system containing niobium and / or scandium and an extraction organic phase are subjected to auxiliary extraction under a composite field of ultrasonic-magnetic field to obtain a loaded organic phase. Innovative research shows that extraction is carried out under an ultrasonic-magnetic field composite field, the final physicochemical characteristics of niobium-scandium in a phosphoric acid solution can be adapted accidentally, excellent extraction capacity can be obtained accidentally, and especially excellent scandium-niobium separation selectivity can be obtained under a composite phosphoric acid system containing niobium and scandium.

The invention belongs to the field of novel environment-friendly materials, and particularly relates to a modified covalent organic framework material for simultaneously adsorbing multiple heavy metal ions as well as a preparation method and application of the modified covalent organic framework material. The preparation method of the material comprises the following steps: dissolving 1, 3, 5-tri (4-aminophenyl) benzene and 2, 5-dihydroxy terephthalaldehyde in a mixed solvent, and standing and reacting at room temperature to obtain a mixed solution; adding scandium trifluoromethanesulfonate into the obtained mixed solution, carrying out standing reaction at room temperature, after the reaction is finished, separating insoluble substances from the reaction solution, and washing and drying the insoluble substances to obtain a covalent organic framework base material; a covalent organic framework base material prepared by adopting a neutral solution is subjected to ultrasonic modification treatment, and then the modified base material is washed and dried to obtain the modified covalent organic framework material. The material modified by the neutral solution shows a good adsorption effect on multiple heavy metal mixed ions in water, and has a good application prospect in the aspect of adsorbing and removing heavy metal ions in a water environment.

The method comprises the following steps: weighing an oxide precursor of metal indium, an oxide precursor of metal M, an ammonium salt and a lithium salt according to a chemical formula of indium-based halide, fully mixing, and calcining in an inert atmosphere to obtain the indium-based halide solid electrolyte. Forming an indium-based halide solid electrolyte through a solid-phase reaction; wherein M is selected from at least one of magnesium, calcium, strontium, barium, aluminum, gallium, indium, bismuth, scandium, yttrium, zinc, germanium, tin, lanthanum, cerium, samarium, gadolinium, holmium, erbium and ytterbium. The method can greatly simplify the synthesis process, reduce the raw material cost and realize industrial batch preparation.

The invention discloses a method for comprehensively recovering metal from nickel-cobalt hydroxide containing scandium, copper and manganese. The method comprises the following steps: carrying out acid leaching on nickel-cobalt hydroxide containing scandium, copper and manganese to obtain nickel-cobalt leachate containing scandium and copper and manganese-containing leaching residues, and precipitating scandium and copper in the nickel-cobalt leachate containing scandium and copper by adjusting the pH value to obtain precipitation residues I containing scandium and copper and nickel-cobalt purified liquid; and returning the precipitation slag I containing scandium and copper to the acid leaching process until the concentration of scandium in the nickel-cobalt leaching solution containing scandium and copper is not lower than 1.5 g / L and / or the concentration of copper is not lower than 7.5 g / L, and respectively recovering scandium and copper in the nickel-cobalt leaching solution containing scandium and copper through extraction separation, the raffinate I obtained in the scandium extraction and separation process is directly returned to the acid leaching process or is continuously subjected to copper extraction and separation; and adjusting the pH value of raffinate II obtained in the copper extraction separation process to precipitate residual scandium and copper, and returning obtained precipitation slag II containing scandium and copper to the acid leaching process. According to the method, the recovery rate of scandium, copper, manganese, nickel and cobalt can be remarkably increased, and the comprehensive utilization rate of the laterite-nickel ore is increased.

The invention discloses a process for separating and recycling scandium, manganese and iron in iron-manganese slag, and belongs to the technical field of metallurgical engineering and comprehensive utilization of secondary resources. The method comprises the following steps: crushing the iron and manganese slag, mixing the crushed iron and manganese slag with a chlorinating agent and a molten salt medium, and carrying out chlorination reaction at 600-850 DEG C, so that iron and manganese are converted into chlorides to volatilize, and scandium is enriched in the slag; the volatile gas is subjected to multi-stage gradient condensation, and manganese and iron concentrates are respectively recovered in different temperature intervals; and leaching-extracting the chlorination residues to obtain a scandium-rich substance. According to the method, source separation and collaborative recovery of iron, manganese and scandium are achieved through pyrogenic process chlorination-condensation, the problems that in a traditional wet process, metal interferes with one another, the process is long, and pollution is heavy are solved, and the method has the advantages of being short in process, small in pollution and high in recycling degree.

The invention discloses a method for detecting trace chromium element in copper foil based on ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer), which comprises the following steps: soaking a lithium battery copper foil in a mixed solution of concentrated nitric acid and hydrofluoric acid for high-temperature digestion, adding a scandium internal standard solution, and fixing the volume to obtain a solution to be detected; preparing a mixed standard solution of chromium element and scandium element with a plurality of concentration gradients, and establishing a standard curve through ICP-OES; and determining the content of the chromium element in the to-be-detected solution according to the standard curve. The lithium battery copper foil is digested through a mixed acid system, concentrated nitric acid provides an acid environment and an oxidation effect, hydrofluoric acid promotes dissolution, it is ensured that the copper foil is completely dissolved, and the digestion efficiency is improved; a scandium internal standard method is introduced, a dynamic background correction mode of ICP-OES is adopted, a scandium internal standard element can correct signal fluctuation in a sample introduction process, dual guarantee is formed by the scandium internal standard element and dynamic background correction, interference of a copper matrix on a Cr spectral line is specifically eliminated, and the trace chromium element detection precision is remarkably improved.

The invention relates to the technical field of hydrometallurgy production, and particularly discloses a method for synergistically extracting gallium and scandium by coupling titanium white waste acid with vanadium extraction converter sludge, which comprises the following steps: mixing titanium white waste acid and vanadium extraction converter sludge in proportion, stirring and leaching to obtain a leaching solution; adding an extraction agent and a diluent into the leaching solution for extraction, and washing to obtain a gallium and scandium loaded organic phase; a first stripping agent is added into the loaded organic phase of gallium and scandium for stripping treatment, and a gallium stripping solution and a loaded organic phase of scandium are obtained; sequentially carrying out alkali precipitation, alkali dissolution and electrolytic treatment on the gallium reverse extraction solution to obtain crude gallium; a second stripping agent is added into the scandium-loaded organic phase for stripping treatment, and a scandium precipitation solution and an organic phase solution are obtained; and the scandium precipitation solution is filtered, washed and subjected to acid dissolution, and a scandium-containing solution is obtained. According to the method, the titanium white waste acid is effectively recycled, rare and precious metals in the vanadium extraction converter sludge are efficiently and synergistically extracted, and the method has a relatively good popularization prospect.

Disclosed in the present disclosure is a method for selectively leaching scandium from red mud. The red mud contains scandium, and the method comprises: using an inorganic acid solution to pretreat red mud to obtain pretreated red mud slurry; and using a leaching agent to carry out selective leaching on the pretreated red mud slurry to obtain leached slurry, the leaching agent containing organic acid and metal inorganic salt, and the mass ratio of the organic acid to the metal inorganic salt being 0.00015-0.0500.

The invention belongs to the field of metallurgy, and particularly relates to a method for comprehensively recovering iron, vanadium, titanium, scandium and gallium through cooperation of vanadium titano-magnetite and red mud, which comprises the following steps: a) mixing vanadium titano-magnetite concentrate powder and red mud powder, roasting, leaching in water, and carrying out solid-liquid separation to obtain leached residues and leached liquid; b) mixing the leachate with a precipitant to precipitate vanadium, and carrying out solid-liquid separation to obtain vanadium-rich slag and vanadium-precipitated clear liquid; dissolving the vanadium-rich slag in a sulfuric acid solution, mixing the vanadium-rich slag with ammonium salt to react, carrying out solid-liquid separation, and roasting the obtained solid product ammonium polyvanadate to obtain V2O5; resin is used for adsorbing and desorbing gallium ions in the vanadium precipitation clear liquid, the pH of desorption liquid is adjusted to be alkaline, then electrolysis is conducted, and crude gallium is obtained; c) washing and drying the leaching residues to prepare pellets; after the pellets are pre-reduced, a carbonaceous reducing agent is mixed, melt separation treatment is carried out, and scandium-containing high-titanium slag and molten iron are obtained; and Ti and Sc in the scandium-containing high titanium slag are recycled. The method has the advantages of simple process, cleanness, high efficiency and the like.

The invention relates to the field of metal materials, and provides a high-speed extrusion low-alloying high-toughness magnesium alloy and a preparation method thereof. The alloy is prepared from the following components in percentage by mass: 0.7 to 1.2 percent of manganese, 0.2 to 0.8 percent of aluminum, 0.4 to 1.2 percent of zinc, 0 to 0.25 percent of additive elements, less than or equal to 0.05 percent of inevitable impurities and the balance of magnesium, the additive element is one or any combination of silver or rare earth, the content of the silver is 0-0.25%, the content of the rare earth is one or combination of cerium or scandium, the content of the cerium is 0-0.25%, the content of the scandium is 0-0.25%, and the total content of alloying elements in the alloy system is less than 3.5%. The preparation method comprises the steps of smelting, gravity casting and high-speed extrusion. The low-cost multi-element microalloyed magnesium alloy is prepared, meanwhile, high-speed extrusion forming of the alloy material is achieved, and long-time heat treatment is not needed before extrusion machining. Wherein the extrusion speed reaches 12-60 m / min, the elongation of the magnesium alloy profile is larger than or equal to 18%, the ratio of the yield strength to the total element content is larger than or equal to 132 MPa / wt.%, and compared with the prior art, the performance is remarkably improved.

The invention provides a laterite-nickel ore leaching solution catalytic oxidation-fractional precipitation method, and relates to the field of hydrometallurgy, the method comprises the following steps: adding a catalytic oxidant and a first neutralizer into a laterite-nickel ore leaching solution to obtain a first filtrate and iron slag; adding a catalytic oxidant, a second neutralizer and a first coalescing agent into the first filtrate to obtain a second filtrate and a second precipitate; adding a third neutralizer and a first reducing agent into the second filtrate to obtain a nickel-cobalt precipitate and a third filtrate; adding a fourth neutralizer and a second reducing agent into the third filtrate to obtain a fourth precipitate and a fourth filtrate; mixing the second precipitate with a third reducing agent, performing reduction leaching, and adding a second coalescing agent and a fifth neutralizing agent to obtain a silicon-aluminum precipitate and manganese-scandium filtrate; the manganese-scandium filtrate is extracted, and manganese enters raffinate; and adding a catalytic oxidant and a sixth neutralizer into the raffinate to obtain the manganese oxide. Elements are recycled step by step, and the method has the advantages of multiple types of recycled elements, less resource waste and the like.

The purpose of the present invention is to provide a method for recovering rare earth elements, whereby, when recovering scandium from steel slag, scandium is recovered from the steel slag and, at the same time, scandium is roughly separated from rare earth elements other than the scandium. The method is characterized in that the scandium-containing rare earth element is leached from the steel slag multiple times in different pH ranges. Further, the method is characterized in that scandium is efficiently recovered by combining the leachate obtained by the method with an element separation step.

Known protective layers with a high Cr content and additionally silicon form brittle phases that become even more brittle under the influence of carbon during use. The protective layer according to the invention has the composition NiCoCrAlYTaSiHf: 22% - 24% cobalt (Co), 14% - 20% chromium (Cr), 8.0% - 12.0% aluminium (Al), 0.2% - 0.6% at least one metal from the group comprising scandium (Sc) and / or rare-earth elements, 1.0% to 3.0% tantalum (Ta), 0.1% to 0.7% silicon (Si), 0.1% to 1.0% hafnium (Hf), nickel (Ni).

The invention discloses an ammoxidation catalyst and a preparation method and application thereof, the active component of the catalyst is represented by a general formula MoxBiaFebAcBdCeDfEgFhOy, A represents at least one element selected from the combination of a nickel element, a cobalt element, a manganese element, a zinc element and a cadmium element; b represents at least one element selected from the group consisting of magnesium, strontium and barium elements; c represents at least one element selected from a combination consisting of potassium, rubidium and cesium elements; d represents at least one element selected from the group consisting of a tungsten element, a vanadium element, a chromium element, a gallium element, a germanium element, a scandium element, an yttrium element, an indium element, a tin element, and an antimony element; e represents at least one element other than promethium element among lanthanide elements; f represents at least one element among platinum group elements. According to the present invention, the composition ratio of the active components of the catalyst is regulated according to the action mechanism of the metal catalyst, such that the comprehensive performance of the catalyst is improved, and the high trinitrile product yield and the low trinitrile yield material consumption are provided.

The invention provides a medical biological rare earth magnesium alloy material. The medical biological rare earth magnesium alloy material comprises magnesium, gadolinium, zinc, zirconium, dysprosium and scandium. According to the rare earth magnesium alloy material provided by the invention, different contents of rare earth gadolinium, dysprosium, scandium, zinc and zirconium are added to improve the casting performance and the processing performance of a melt, and the alloy structure is improved through solid solution strengthening, dispersion strengthening and grain refinement effects, so that the strength and the ductility are improved; meanwhile, the selection design of the alloy elements strictly conforms to the limitation of biotoxicity, and the biological activity of the alloy elements can not be influenced, so that excellent mechanical properties and processability are obtained while good biocompatibility is kept, and the alloy elements play roles in accelerating osteogenesis and promoting bone tissue growth while playing a fixing role; the non-toxicity, the degradability and the high therapeutic property are really realized.

The invention belongs to the field of mineral treatment, and particularly relates to a selective leaching method for scandium in a scandium-containing mineral, which comprises the following steps: roasting the scandium-containing mineral and an additive to obtain a roasted material, and mixing the roasted material with a leaching agent for leaching to obtain a scandium-rich leachate; the additive is an inorganic salt of at least one cation of sodium, calcium, potassium and ammonium; the leaching agent comprises an aqueous solution of a component A and an aqueous solution of a component B, wherein the component A is a C2-C10 water-soluble binary or above carboxylic acid compound; the component B is a water-soluble salt of the component A; the molar ratio of the component A to the component B is 1: (0.5-5); and the concentration of the component A in the leaching agent is 1-15 mol / L. According to the method, the scandium-containing mineral is roasted and modified through the additive, and then the scandium-containing mineral is leached through the buffer system containing the component A and the component B, so that synergy can be achieved, and scandium in the scandium-containing mineral can be selectively and efficiently extracted.

The invention discloses a metallurgical solid waste all-component collaborative recovery and high-value utilization method, and belongs to the technical field of metallurgical resource recycling and green metallurgy. According to the method, blast furnace gas sludge, iron-manganese slag and vanadium extraction converter sludge are synergistically blended, and after briquetting and drying, reduction smelting is carried out in an inert atmosphere. Reducing the iron into molten iron; volatile metals such as zinc, indium and gallium are evaporated and enter flue gas, and gallium-indium alloy, crude zinc and residual ash are recovered in a graded manner through a multi-stage condensation system; the slag is subjected to acid leaching to enrich scandium, the leaching liquid is separated to extract vanadium, manganese and scandium, and the leaching slag is used for preparing low-carbon cement. According to the method, all-component collaborative recovery of valuable metals in various metallurgical solid wastes and building material utilization of residual solid wastes are realized, and the method has the advantages of high resource efficiency and environmental friendliness.

This powder for sintering contains: a primary powder composed of aluminum or an aluminum alloy; and an oxide of at least one rare earth metal element selected from scandium, yttrium, and lanthanoid elements. This powder (1) for sintering is composed of a mixed powder having: particles (2) of a primary powder composed of aluminum or an aluminum alloy; and additive particles (3) composed of an oxide of at least one rare earth metal element selected from scandium, yttrium, and lanthanoid elements, wherein at least some of the additive particles (3) may adhere to the surface of the particles (2) of the primary powder.

The invention provides a niobium-hafnium alloy material and a preparation method and application thereof, and belongs to the field of nonferrous metal materials. The preparation method of the niobium-hafnium alloy material comprises the following steps that a scandium-zirconium alloy wire or a rare earth-zirconium alloy wire is wound on a metal niobium rod, the metal niobium rod is electrified and heated to generate a high-temperature area, and metal hafnium is placed in a low-temperature area; the iodine reacts with metal hafnium in the low-temperature area to generate hafnium iodide, the generated hafnium iodide is diffused to the high-temperature area and decomposed into metal hafnium on the surface of the niobium rod wound with the alloy wire, and a scandium-zirconium-niobium-niobium metal rod with a scandium-zirconium-niobium rod or a rare earth zirconium-niobium rod as the center and with the metal hafnium wrapped on the surface or a rare earth zirconium-niobium-hafnium metal rod with the metal hafnium wrapped on the surface is formed; raising the temperature of the metal niobium rod and keeping constant temperature for a certain time; and then smelting is conducted, and the niobium-hafnium alloy material is obtained. According to the prepared niobium-hafnium alloy material, the processing performance of metal hafnium is effectively improved, the internal and surface defects of the alloy are reduced, the high-voltage electrostatic oxidation corrosion resistance is improved, and the service life of equipment is prolonged.

The utility model relates to a scandium waste precipitation recovery device, and belongs to the technical field of metallurgy. According to the technical scheme, the problem that a precipitant and the interior of scandium waste cannot be conveniently mixed is mainly solved. Comprising a sedimentation tank, the top of the sedimentation tank is fixedly connected with a supporting frame, the bottom of the supporting frame is rotatably connected with a hollow shaft through a bearing, one side of the sedimentation tank is fixedly connected with a driving assembly, the driving assembly is used for rotating the hollow shaft, and one side of the sedimentation tank is fixedly connected with a storage assembly. According to the scandium waste stirring and mixing device, scandium waste can be stirred and mixed under the cooperation of the stirring assembly, the rhombic column, the first gear disc and the second gear disc, through the arrangement of the mode, the scandium waste and a precipitant can be better and fully dissolved and mixed, the problem that the efficiency is low when the precipitant reacts with the scandium waste is solved, and the scandium waste can be effectively stirred and mixed. And the working efficiency of the recovery device is further improved.

The invention discloses a method for extracting and recovering scandium and copperas from a scandium-containing solution without emulsification. The method comprises the following steps: (1) leaching scandium-containing waste residues by using titanium white waste acid to obtain a scandium-containing leachate; (2) a certain amount of iron powder is added into the scandium-containing leachate, after the iron powder reacts completely, the solution is put into a low-temperature constant-temperature tank to be crystallized, suction filtration is conducted after crystallization is completed, and iron-removed leachate and copperas are obtained; and (3) extracting the iron-removed leachate by using a P204-TBP extraction system to obtain a scandium-containing organic phase, wherein the scandium-containing organic phase is not emulsified in the process.

The invention discloses a manufacturing process of multifunctional stainless steel, belongs to the technical field of stainless steel manufacturing, and aims to solve the problems that an existing nano reinforced phase is easy to agglomerate and difficult to uniformly disperse in molten steel, and the performance improvement effect of a material is influenced. By introducing the rare earth-intermetallic compound composite additive, rare earth elements yttrium and scandium can effectively refine grains, purify grain boundaries and improve the strength, toughness and corrosion resistance of the material, nickel trialuminide and a steel matrix are well combined, the dispersion strengthening effect is achieved, and meanwhile the high-temperature performance and thermal conductivity of the material are improved; vanadium and niobium elements are added to form fine carbides, the material is further strengthened, the various elements and the additive have a synergistic effect, parameters of all steps of the preparation process are clear, required equipment can be realized by properly modifying existing metal material processing equipment, the process stability is good, the production efficiency is high, and the production cost is low. The method is suitable for large-scale industrial production.

The present invention discloses a phase change junction film, a phase change memory and a preparation method thereof. The phase change junction film comprises a structural phase change layer and a structural stabilization layer alternately stacked; wherein the structural phase change layer is a cubic phase M x Sb2Te3 layer, the structural stabilizing layer is a hexagonal Ti y Te 1‑y layer, M is one of scandium and yttrium. The present invention is based on the cubic phase of M x Sb2Te3 structure phase change layer and hexagonal Ti y Te 1‑y The phase-shifting heterojunction film, formed by alternating stacking of structurally stable layers, offers faster operating speeds, lower operating power consumption, and improved fatigue cycle life. It also possesses the performance advantages common to heterojunction materials, namely, extremely low resistance drift and resistance fluctuation under weaker atomic diffusion conditions.

A method of forming a film on a surface of a substrate in an internal volume of a reactor is provided. The method includes: dosing the surface of the substrate with a scandium precursor; purging the scandium precursor from the internal volume of the reactor; dosing the surface of the substrate with a co-reactant; and purging the co-reactant from the internal volume of the reactor.

Process for producing a layer on a substrate by metal-organic vapor phase epitaxy, which comprises at least one compound of the formula M 1 a SC 1-a Containing or consisting of N, where M 1 is selected from Al or Ga or In and 0.01 ≤ 1-a ≤ 0.295, characterized in that a precursor containing scandium is used with a molar flow (ṅ) of at least 10 -6 mol / min into a reaction chamber (1) for metal-organic vapor phase epitaxy, in which the precursor is present in a bubbler (2) whose temperature is between 120°C and 200°C, wherein the precursor contains or consists of a cyclopentadiene, and the cyclopentadiene contains scandium.

Disclosed is an eye drop composition for treating and preventing eye diseases. The eye drop composition for treating and preventing eye diseases contains, as active ingredients, minerals that have lost at least one electron, selected from germanium (Ge), silver (Ag), iridium (Ir), nickel (Ni), palladium (Pd), tantalum (Ta), antimony (Sb), zinc (Zn), indium (In), boron (B), astatine (At), thallium (Tl), magnesium carbonate (MgCO3), tin (Sn), iron (Fe), calcium sulfide (CaS), molybdenum (Mo), chromium (Cr), sodium (Na), tungsten (W), gallium (Ga), strontium (Sr), potassium (K), beryllium (Be), barium (Ba), magnesium (Mg), scandium (Sc), yttrium (Y), calcium (Ca), titanium (Ti), vanadium (V), hafnium (Hf), bromine (Br), zirconium (Zr), copper (Cu), manganese (Mn), rubidium (Rb), technetium (Tc), platinum (Pt), niobium (Nb), gold (Au), phosphate (Pi), rhenium (Re), ruthenium (Ru), cobalt (Co), zinc oxide (ZnO), aluminum (Al), selenium (Se), bismuth (Bi), phosphorus (P), rhodium (Rh), silicon (Si), iodine (I), tellurium (Te), sulfur (S), lithium (Li), osmium (Os), magnesium hydroxide (Mg(OH)2), and cesium (Cs), wherein the minerals are at least five types of minerals. The eye drop composition is very safe for the human body, and thus can be very effectively used as an eye drop agent for treating and preventing eye diseases, as well as for completely curing cataracts.

The invention discloses a method for promoting scandium element recovery, which comprises the following steps of: adding iron salt into a scandium-containing aluminum solution to obtain an aqueous phase solution, extracting by using an organic phase, separating liquid to obtain an Sc-Fe-organic phase, adding liquid caustic soda to carry out reverse extraction scandium precipitation, separating liquid again to obtain high-scandium slag and a liquid caustic soda water phase, dissolving out the high-scandium slag and the liquid caustic soda water phase, and recycling the scandium element. And sequentially filtering, diluting and separating to obtain high-purity Sc (OH) 3 and lower-concentration caustic soda liquid. According to the method, the co-precipitation characteristic of Sc (OH) 3 and Fe (OH) 3 is utilized, so that the scandium element is efficiently separated from the iron saponification oil residue in the liquid alkali environment, the production difficulty is remarkably reduced, the high purity of the scandium product is ensured, no newly added impurity is added in the whole process, and efficient and clean recovery of the scandium element is realized.