19 results about "Minor metals" patented technology

The invention provides a die-casting aluminum alloy material and a preparation method of the die-casting aluminum alloy material, and belongs to the technical field of die-casting aluminum alloy materials. The aluminum alloy material comprises the following components in percentage by weight: 0.05 percent to 0.1 percent of silicon, 0.45 percent to 0.83 percent of iron, 0.018 percent to 0.05 percent of copper, 1.2 percent to 2.6 percent of manganese, 0.35 percent to 0.7 percent of magnesium, 3.3 percent to 4 percent of zinc, 0.04 percent to 0.08 percent of chromium and the balance of aluminum and inevitable impurities containing trace metals. The technical problem to be solved by the invention is to overcome the defect that the surface of the conventional die-casting aluminum alloy after anodic oxidation is grey black and cannot be subjected to color treatment.

The invention provides a glass ceramic precursor, a preparation method and an application of the glass ceramic precursor in preparation of glass ceramic, the characteristic of high silicon in lead-zinc smelting depleted slag is utilized, household garbage incineration fly ash which is a dangerous waste is added, and the glass ceramic precursor can be prepared after melting-water quenching treatment; on one hand, the smelting depletion slag and the household garbage incineration fly ash can be digested, on the other hand, trace metals in the smelting depletion slag and the household garbage incineration fly ash are immobilized, the strength of the glass ceramic prepared from the glass ceramic precursor is improved, and therefore the utilization efficiency and the additional value of the smelting depletion slag and the household garbage incineration fly ash are effectively improved.

The invention relates to the technical field of a produced liquid stratum source identification method, in particular to a method for judging an oilfield produced liquid stratum source, which comprises the following steps of: calculating the similarity S1 between a crude oil trace metal element fingerprint spectrum of a sample to be determined and a crude oil trace metal element standard fingerprint spectrum of a target stratum; the similarity S2 between the stratum water trace metal element fingerprint spectrum of the sample to be determined and the stratum water trace metal element standard fingerprint spectrum of the target stratum is calculated, if the S1 and the S2 are both larger than 0.9, the produced liquid from the stratum to be determined comes from the target stratum, and if the S1 and the S2 are not larger than 0.9 at the same time, the produced liquid from the stratum to be determined does not come from the target stratum. According to the method, the trace metal element composition of the crude oil and the formation water in the produced liquid is converted into the trace metal element fingerprint spectrum for the first time to determine which formation the produced liquid comes from, so that the difference information of the crude oil and the formation water in the produced liquid can be more intuitively reflected, and the accuracy of judging the source of the produced liquid is improved.

The application relates to the technical field of inorganic high-purity powder material preparation, in particular to a continuous preparation process of high-purity magnesium oxide particles, the purity of the magnesium oxide particles is not less than 99.95%, the D50 particle size is 1.8-2.1 mu m, the particle size distribution span is 0.70-0.85, the total content of trace metal impurities is 2.1-4.2 ppm, the thermal weight loss rate is 0.04%-0.08%, and the bulk density is 0.48-0.55 g / cm 3 3 . The application adopts a continuous production mode, replaces a traditional batch process, realizes whole-process continuous operation of raw material feeding, reaction, crystallization, washing, drying, calcination and grading, greatly improves the stability and uniformity of a production process, eliminates batch quality differences, and adapts to industrial large-scale production requirements.​

The utility model discloses a powder coating trace metal impurity removing and sorting device which comprises a filtering cylinder, a first filtering plate and a second filtering plate, cylinder covers are installed at the two ends of the filtering cylinder, a discharging opening is formed in the lower half portion of the filtering cylinder, the first filtering plate is arranged in the discharging opening, a groove body is installed in the center of each cylinder cover, and a plurality of grooves are formed in the groove body. A collecting shell is arranged in the groove body and the shaft hole, an annular groove is formed in the inner side face of the cylinder cover, a ring body is movably arranged in the annular groove, the two ends of the second filter plate are installed on the ring body, and a driving mechanism for driving the ring body to rotate is installed on the cylinder cover. The powder coating filtering device is simple in structure, filtering can be rapidly conducted through combination of the first filtering plate and the second filtering plate, along with rising of the second filtering plate, powder coating can be filtered, metal impurities are intercepted, after the second filtering net rotates to a certain angle, the metal impurities can automatically slide into the collecting shell along the inclined second filtering plate, and the powder coating filtering device is convenient to use. And impurities can be conveniently collected.

The invention relates to the technical field of functional ceramic products, in particular to original degerming and moisturizing functional ceramic and a preparation method and a use method thereof.The functional ceramic is formed by firing natural mineral argil, and the natural mineral argil is naturally enriched with at least two trace metal elements of iron, copper, zinc and manganese needed by human metabolism; the porosity of the body of the functional ceramic is 15-30%, and the functional ceramic is used in cooperation with food to be heated in a microwave oven heating scene. According to the invention, natural mineral argil is taken as a raw material, and through structural design and process optimization, triple functions of moisturizing, nutrition supplement and sterilization in a microwave oven heating scene are realized, so that the core pain point of food moisture loss is solved, trace elements required by a human body are safely supplemented, and meanwhile, the safety of food after heating can be improved; the product is stable in preparation process and convenient to use, and has high practical value and market prospect.

The application provides a preparation method of a sodium-ion battery multi-element precursor and a positive electrode material from laterite nickel ore. The preparation method directly converts the laterite nickel ore into a jarosite precipitate and a nickel solution containing multiple trace metals, and then synthesizes a multi-element high-nickel precursor from the nickel solution through a coprecipitation process. Finally, the jarosite and the precursor are mixed and sintered to prepare the positive electrode material of the sodium-ion battery. The preparation method directly converts the mineral resources into the positive electrode material, greatly shortens the production process, and reduces the production cost, thereby providing a good reference for the preparation of the sodium-ion battery multi-element precursor and the positive electrode material. Meanwhile, the preparation method can control the residual amount of impurity metal elements in the raw materials in a targeted manner, so as to achieve in-situ doping in the preparation process of the precursor. The effective utilization of all metals in the laterite nickel ore is realized, the economic value of the resources is improved, and the raw material loss is reduced. The positive electrode material exhibits excellent electrochemical performance and has a good commercial prospect.

The invention discloses a pretreatment method for trace metal impurity detection of a high-purity electronic-grade silicon-based precursor material. The method comprises the following steps: heating and volatilizing a liquid sample in an ultrapure PTFE / PFA beaker, and redissolving by using an electronic-grade inorganic acid-organic acid composite acid system; uniform heating is achieved through a special heating plate, pretreatment volatile organic waste gas is treated in cooperation with a hundred-grade dust-free environment, a clean operation table and a tail gas condensation and collection system, meanwhile, metal impurity concentration of different degrees can be achieved through the proportion of the use amount of a pretreatment sample to the use amount of redissolved inorganic acid, the detection limit is effectively reduced to 1-5 ppt, and the detection efficiency is improved. The recovery rate of the metal impurity detection pretreatment method reaches 85%-115%. The method breaks through the defects of long pretreatment time, silicon and carbon residues, metal loss caused by severe pretreatment reaction and the like of a traditional hydrolysis and digestion method, the treatment time is shortened to 2-4 hours, the G4 / G5 level (single metal 1t, 10ppt) detection requirement is effectively met, and a high-sensitivity and low-background-interference detection scheme is provided for impurity management and control of a high-purity silicon-based precursor in an advanced process.

The application discloses a method for high-selectivity recovery of beryllium from lithium smelting beryllium-containing clinker, and belongs to the technical field of beryllium-containing solid waste resource utilization. After the lithium smelting beryllium-containing clinker is crushed, slurry is prepared, and under the shearing action, concentrated acid is slowly added dropwise to the slurry to precisely control the pH of the slurry in the range of 3.0-3.5 to perform reaction. After the reaction is completed, solid-liquid separation is performed to obtain beryllium-containing filtrate. The beryllium-containing filtrate is subjected to precipitation by using a sodium hydroxide solution to precisely control the end-point pH of the beryllium-containing filtrate in the range of 8.5-9.0, and a composite precipitate containing beryllium hydroxide and potassium sodium cryolite is obtained. The method completely breaks the traditional situation of 'waste production waste', not only realizes efficient separation of the highly toxic beryllium, but also directly converts the beryllium-containing solid waste into 'rich beryllium potassium sodium cryolite composite concentrate' with a main phase of crystalline potassium sodium cryolite and a beryllium grade of more than 5.5%, realizing double high-value extraction of trace metals (beryllium) and bulk minerals (cryolite).

The present application provides a kind of detection method of ash in asphalt.The detection method includes: step S1: raw materials including asphalt and dispersant are heated and mixed in sequence to obtain melt;Step S2: melt is crystallized to obtain asphaltene crystal;Crystallization treatment includes temperature drop and isothermal crystallization treatment in sequence;The temperature drop rate of temperature drop is ≤5℃ / min;Step S3: asphaltene crystal is phase separated to obtain crystalline phase;Step S4: crystalline phase is ashed to obtain ash;The temperature of ashing treatment is ≤200℃;Step S5: ash is detected to obtain the composition and mass content of ash.The detection method of the present application can realize efficient enrichment of ash and very low background interference, can detect most of the trace metal elements in ash, and has good accuracy and repeatability, thereby better meeting the quantitative detection needs of high-quality asphalt for very low ash content.

The invention belongs to the technical field of target materials, and discloses a doped nickel oxide-based target material as well as a preparation method and application thereof. The doped nickel oxide-based target material comprises the following raw material components: nickel oxide, lithium oxide and other metal oxides, wherein the other metal oxides are selected from at least one of copper oxide, cobalt oxide and silver oxide. The doped nickel oxide-based target material prepared by the invention can be used for RPD coating and evaporation coating, and the grain structure of the nickel oxide-based evaporation target material is improved and the carrier concentration and mobility of the thin film are improved in a lithium oxide doping manner and other specific trace metal oxides, so that the hole conductivity of the nickel oxide-based thin film is improved.

The invention relates to the technical field of hard alloy materials, in particular to an alloy solid solution, a preparation method, hard alloy and application. The alloy solid solution is prepared from the following raw materials in parts by weight: 15 to 17 parts of tantalum oxide, 15 to 30 parts of titanium carbonitride, 45 to 60 parts of tungsten carbide, 1 to 4 parts of carbon black, 5 to 10 parts of cobalt, 0.1 to 0.7 part of chromium nitride, 0.01 to 0.1 part of trace metal and 0.001 to 0.003 part of rare earth; the trace metal comprises at least one of indium, tin and copper sources. The alloy solid solution provided by the invention is prepared from tantalum oxide, titanium carbonitride, tungsten carbide, carbon black, cobalt and chromium nitride, and has the advantages of high purity, good toughness, high hardness, wear resistance, high temperature resistance and the like.

The invention relates to the technical field of metal content determination, in particular to a method and equipment for determining the content of trace metal in micro-powder lithium carbonate, and the method comprises the following steps: screening out a characteristic wavelength from all specific wavelengths of each to-be-determined trace metal element based on wavelength difference and spectral intensity difference between different specific wavelengths; analyzing the wavelength difference and the spectral intensity difference between each non-specific wavelength and all other non-specific wavelengths, counting the frequency of the spectral intensity corresponding to each non-specific wavelength in the spectrum, and determining the baseline interference degree to screen the baseline interference wavelength; and correcting the spectral intensity based on the spectral intensity and the baseline interference degree of all the baseline interference wavelengths so as to measure the content of each trace metal element to be measured in the micro-powder lithium carbonate. According to the method, by screening the characteristic wavelength and adaptively deducting the background noise, the accuracy and reliability of measuring the content of the trace metal in the micro-powder lithium carbonate are improved.

The application relates to a preparation method of high-purity chromium powder for a target material, comprising the following steps: (1) performing electron beam melting treatment on pretreated electrolytic chromium sheet to obtain a chromium ingot; removing both ends of the chromium ingot to obtain a high-purity chromium ingot; the electron beam melting treatment comprises gradient temperature rising treatment, refining treatment and directional solidification treatment; (2) performing ball milling treatment and screening treatment on the high-purity chromium ingot to obtain the high-purity chromium powder. Through the electron beam melting technology and a multi-section electron beam power control strategy, the application realizes accurate regulation and control of the temperature of a molten pool and refining kinetics. The preparation method can not only efficiently remove conventional metal impurities with a vapor pressure significantly higher than that of chromium, but also promote the diffusion and selective removal of trace metal impurities with a vapor pressure similar to that of chromium, so that the limit of the original purification method is broken through.

This invention relates to a composite calcium oxide slag based on furnace lining adsorption and its application, belonging to the field of protective slag technology. The composite calcium oxide slag of this invention comprises the following raw materials in parts by weight: CaO 48-52 parts, Al2O3 35-40 parts, MgO 5-8 parts, and metallic aluminum powder 1-3 parts. The raw materials are pre-melted and mixed to obtain the composite calcium oxide slag. Before pre-melting and mixing, alumina and metallic aluminum powder are ball-milled, and the aluminum powder is embedded in the alumina matrix in the form of nanocrystals, improving the stability of the composite calcium oxide slag. By utilizing the trace amounts of metallic aluminum pre-embedded in the slag, a rough structure is generated in situ on the surface of the magnesium-aluminum spinel furnace lining, thereby enhancing the mechanical anchoring and chemical adsorption of the dynamic reaction film, reducing the film formation temperature, and greatly increasing the film coverage.

A process for producing high purity alumina (HPA) or high purity aluminium salts from an aluminium-bearing material, such as is disclosed. An aluminium-bearing solution is first obtained by either dissolving or leaching the aluminium-bearing material. Aluminium is then selectively extracted by liquid-liquid or liquid-solid extraction to obtain an aluminium-enriched liquid or aluminium-enriched solid phase. Minor metal impurities still remaining in the aluminium-enriched liquid or solid phase are removed by scrubbing the aluminium-enriched liquid or aluminium-loaded ion exchange resin with an aqueous solution thereby producing a metal impurity-depleted aluminium-enriched liquid or metal impurity-depleted aluminium enriched solid phase. Aluminium is then stripped from the scrubbed liquid or solid phases with an acidic aqueous solution to produce an aluminium-enriched aqueous solution. High purity aluminium salts may be crystallised from said solution. Alternatively, the pH of said solution may be raised to precipitate an aluminium precipitate, such as Al(OH)3, which is then calcined to produce HPA.

The invention discloses a copper-containing etching waste liquid cyclic regeneration method based on a regeneration additive, which comprises the following steps: S1, preparing a composite regeneration agent mother solution, S2, preparing an etching activator, S3, carrying out electrolytic catalytic regeneration treatment, S4, removing gradient impurities, S5, activating etching performance, and S6, recovering and compounding. The oxidation efficiency is remarkably improved by catalyzing hydrogen peroxide through potassium bromide, the etching activity of high-valence copper is quickly recovered, buffer components consumed by etching are synchronously supplemented in combination with ammonium sulfamate, and the capability attenuation bottleneck of a traditional pure oxidation regeneration method is broken through; polyvinylpyrrolidone and ethylenediamine tetraacetic acid tetrasodium salt are utilized to synergistically stabilize colloid and chelate heavy metal impurities, and three targeted impurity removal steps of colloid removal through gradient microfiltration, trace metal ion deep removal through chelating resin and vacuum flash evaporation salt control are matched, so that effective control of soluble organic matters, by-products and salt is realized; and a high-efficiency closed cycle production system is formed.