225results about How to "Shorten milling time" patented technology

The invention provides a method for preparing flake silver powder with low bulk density. The method comprises the following steps of reducing silver powder, i.e. adding pure water into a reaction container, and adding silver nitrate under a stirring condition to make the silver nitrate completely dissolved; adding a PH(Potential Of Hydrogen) value regulator, stirring, adding formaldehyde serving as a reducer to perform chemical reaction, washing the silver powder and drying; and ball-milling, i.e. weighing the silver powder, adding zirconia, filling in a ball-milling pot, adding a ball-milling solvent, a ball-milling aid and an emulsifier, ball-milling, sieving, washing by using a cleaning solvent, and drying to obtain the flake silver powder. The silver powder prepared in the reducing process by the method is not added with any dispersing agent, has low impurity content and high purity; and moreover, the technical process is simple, the ball-milling time is short, and the method is easily industrialized.

The invention discloses a preparing method of a metal magnetic powder core. The preparing method includes the following steps that (1) master alloy is melt through a vacuum induction furnace, and an alloy thin belt is obtained through a quick quenching device; (2) ball milling is conducted on the thin belt; (3) annealing is conducted on powder; (4) particle size distribution is conducted on the annealed powder; (5) passivant is added into the distributed powder to conduct passivating on the powder, and then a binding agent and an insulating agent are added into the powder to conduct insulating bonding and wrapping on the powder; (6) a lubricating release agent is then added, the mixture is mixed, and compression moulding is conducted; (7) annealing is conducted on a sample obtained through compression moulding, and the sample is cooled along with the furnace, and spraying and coating are conducted to obtain the target product. According to the preparing method, the master alloy contains an appropriate number of alloy elements, so that the alloy processing performance is improved; the alloy powder and an insulating medium are mixed and pressed to be the magnetic powder core, so that eddy-current loss under a high frequency can be greatly reduced; meanwhile, the problem that alloy materials are limited in use due to single shapes is solved through shape diversity of the magnetic powder core.

The invention discloses a preparation method for electromagnetic wave interference resistant iron silicon aluminum nickel alloys. The invention comprises the following steps: firstly, ferrum, aluminum, silicon and nickel with a purity more than 99.9 weight percent are taken as raw materials and laid into a medium frequency vacuum induction furnace for smelting, and a master alloy is obtained; secondly, the master alloy after smelting is laid into a quick quenching device; an alloy ingot casting is quickly poured on a water-cooling roll wheel which rotates at high speed after arc remelting under the protection of high purity inert gases, and a quickly condensed sheet band or a quickly condensed sheet is obtained; thirdly, the sheet band or the sheet is laid into a ball mill for ball milling flat processing, and flat powder is obtained; fourthly, the flat powder is laid into a stainless steel tube which is then vacuumized and filled with high purity inert gases for protection, and then the stainless steel tube is laid into a tube furnace for heating, heat preservation and cooling along with the furnace; fifthly, the flat powder and binding agents are mixed and milled for processing the sheet. The preparation method for the electromagnetic wave interference resistant iron silicon aluminum nickel alloys adds adequate nickel into Sendust alloys, thereby the processability of the alloys is improved; the ball milling time is reduced; the cost of industrial production is saved; simultaneously the magnetic conductivity can be improved and the magnetic shielding effect can be improved.

The invention relates to a method for refining iron and removing phosphorus from complex refractory high-phosphorus iron ore, in particular to a method for sorting high-phosphorus iron ore by combining microwave reduction roasting and low intensity magnetic separation, and belongs to the technical field of mineral processing, particularly iron ore beneficiation. The method comprises the following steps: crushing refractory high-phosphorus iron ore used as raw material into granules with granularity of less than 2mm; mixing the crushed raw ore with a fluxing agent and a reducing agent in a certain proportion; transferring the obtained mixed material into a microwave reaction furnace for reduction roasting; and carrying out water-quenching, cooling, ball-milling and wet-magnetic-separating on the obtained roasted ore to finally obtain iron ore concentrate. In the method, the ore is reduced by utilizing a microwave roasting technology, wherein microwave reduction roasting time is short, and the temperature of the ore is raised quickly; and meanwhile the fluxing agent is added so as to promote gangue softening and improve refractory ore structure together with microwave roasting reaction. By utilizing the method for sorting the high-phosphorus iron ore, the iron ore concentrate with grade of more than 58.39% can be obtained, and phosphorus removal rate reaches over 70.44%, thus a new technique is provided for sorting the high-phosphorus iron ore.

The invention provides a nano hard alloy material containing spherical face-centered cubic structure cobalt powder and a preparation process thereof and belongs to the technical field of hard alloy preparation. The method comprises the steps of using 12-14 wt.% of the spherical face-centered cubic structure cobalt powder with the average grain diameter in a range of 200-300nm, 65-70 wt.% of tungsten carbide with the average grain diameter in a range of 200-300nm, 16-23 wt.% of tungsten carbide-titanium carbide-vanadium carbide-tantalum carbide-chromium carbide solid solution powder with the average grain diameter in a range of 300-400nm and a proper amount of an active and surface dispersing agent, and combining with airtight inert gases to protect high-speed ball milling, spray drying and overpressure sintering, so that sintering bodies are compact to the maximum extent, grain growth is restrained, the high-temperature performance of an alloy is optimized, and finally the high-hardness high-strength hard alloy material is obtained. The process is optimal in technology, easy to operate and applicable to industrial production.

The invention discloses tape casting slurry for a laminated sheet type electronic component and a preparation method for the tape casting slurry. The tape casting slurry comprises 45 to 55 weight percent of ceramic or ferrite powder, 0.1 to 1.0 weight percent of dispersing agent, 30 to 48 weight percent of solvent, 3 to 8 weight percent of adhesive, 3 to 5 weight percent of plasticizer, 0.1 to 0.5 weight percent of 2-methyl-2,4-pentendiol serving as an addition agent a and 0.1 to 0.5 weight percent of silane coupling agent serving as an addition agent b. The 2-methyl-2,4-pentendiol is added, so that the problems that the viscosity of the slurry is rapidly increased, and the performance of a membrane is rapidly deteriorated because boric is added are solved; the silane coupling agent is added, so that the slurry is low in viscosity and high in dispersing performance, the green density of the membrane is increased, and the ductility is enhanced; and the finally prepared slurry is uniform, stable and suitable for large-scale production.

The invention discloses a method for preparing a superfine AgSnO2 doped electrical contact material by a high energy ball milling method. The method comprises the following specific steps: (1), a superfine SnO2, La2O3, CuO and CdO mixed oxide suspension is prepared with a high energy ball milling wet mixing method; (2), two types of silver powder with different particle sizes are mixed, and added to the superfine SnO2, La2O3, CuO and CdO mixed oxide suspension; (3), the mixed silver power and superfine mixed oxide power are subjected to ball milling treatment to form AgSnO2 composite powder; (4), the AgSnO2 composite powder is subjected to annealing treatment; (5), the annealed AgSnO2 composite is moulded and sintered; and (6), the superfine AgSnO2 doped electrical contact material is obtained. According to the method, oxide and the silver powder are mixed uniformly before high energy ball milling, and subjected to the high energy ball milling and subsequent processing, and then the contact material with superfine oxide dispersedly distributed in a silver substrate can be prepared.

The invention discloses a nano microstructure silicon negative electrode material preparation method. The preparation method comprises the following steps: 1) metallurgy nano silicon is dispersed in organic dispersion liquid; 2) HF-metal salting liquid is prepared as an etching agent, the etching agent is slowly added in silicon pre-dispersion liquid, and the nano silicon with the surface deposited with the metal particles can be obtained; 3) the nano silicon with the surface deposited with the metal particles is re-dispersed in the organic dispersion liquid; 4) a HF-H2O2 solution is added inthe silicon dispersion liquid, and the organic dispersion liquid is intermittently added; 5) porous silicon is immersed in a HNO3 solution to obtain the high-purity porous silicon; and 6) the high-purity porous silicon is subjected to ball milling processing with a controllable oxidation degree. The method employs combination of metal auxiliary chemical etching and ball milling with the controllable oxidation degree, and the nano microstructure silicon negative electrode material with the surface coated with a layer of compact oxide SiOx and having micropores inside can be prepared, a lithium ion transmission path is shortened, silicon volume expansion can be accommodated, and the method has excellent cycle stability.

The invention belongs to the field of inorganic nano material. The prior preparation method of a boron nitride nano tube has the problems of low production rate, high cost, complicated technology, difficult dimension control and the like. The preparation method comprises the steps: putting boron and a catalyst on the basis of weight ratio of 1 to (0.01 to 0.05) into a plastic bottle; using a nonaqueous solvent as a medium; ball-milling the boron and the catalyst for 8 to 24 hours; sieving the boron and the catalyst in a screen of 100 meshes after drying; heating a sieved mixture under the protection of argon gas; stopping leading the argon gas and leading nitrogen gas or the mixed gas of ammonia gas and the nitrogen gas when the temperature reaches 1000 DEG C to 1300 DEG C; keeping the temperature for 0.5 to 5 hours; reducing the temperature to room temperature after the constant temperature is finished; adding an obtained product to nitric acid for ultrasonic processing; removing the remained catalyst; and obtaining the boron nitride nano tube. The preparation method has the advantages of low cost, simple preparation technology, good repeatability and easy control and amplification of reaction; and the obtained boron nitride nano tube has the advantages of high production efficiency, easy purification, controllable tube diameter, controllable length and the like.

The invention discloses a process method for producing high-quality medium-alumina ceramic balls by inferior raw materials, which comprises the following steps: firstly washing a main raw material - inferior bauxite clinker with water, picking out to remove impurities, adding the inferior bauxite clinker with removed impurities, diaspore, clay, an efficient flux component and a diluent into a ball mill on a weight basis, performing ball milling twice with a proper amount of water, performing primary coarse milling and sieving by a 400-mesh sieve, performing secondary fine milling and sieving by a 600-mesh sieve, performing wet washing of the prepared slurry to remove iron, performing spray granulation and homogenization to prepare a mud blank, then performing dry-pressing, classification and molding with a mould, drying to prepare a semi-finished ceramic ball, charging the semi-finished ceramic ball into a kiln, sintering the ceramic ball at a preserved temperature of 1340 DEG C. The invention shortens the ball milling time, saves energy, reduces cost, uses a large amount of inferior raw materials, widens the range for material selection, produces high-quality medium-alumina ceramic balls with high strength, good wear resistance, and comparable application effect to existing medium-alumina ceramic balls, reduces production cost by 10-15%, is energy-saving and high-efficient, and facilitates healthy economic development.

The present invention provide a method for producing micronized solid particles through a two-step process. The solid particles of the invention comprise metals or metal compounds, especially copper and copper compounds. The solid particle of the invention further comprise organic biocides. The invention further provides a wood preservative composition and wood comprising the solid particles of the invention, which may be diluted to the target concentration with or without addition of a co-biocide and vacuum/pressure impregnated into a variety wood species including refractory wood species to effectively preserve the material from fungal and insect attack.

The invention belongs to the technical field of metal high temperature alloys, and discloses a ti-based high temperature alloy with high toughness in a bi-state structure and a preparation method and an application thereof. The high temperature alloy comprises the following components in atomic percent: 64-68at.% of Ti, 8-18at.% of Nb, 6-10at.% of Cu, 5-8at.% of Ni, 3-8at.% of Al and inevitable trace impurities. The structure of the ti-based high temperature alloy consists of a widmanstatten structural base body and an equiaxial (Cu, Ni)-Ti2 phase. The invention further discloses the preparation method of the ti-based high temperature alloy. The method comprises the following steps: first, preparing alloy powder by high energy milling; and then, quickly sintering alloy powder by pulse current, wherein the process condition is as follows: in a spark plasma sintering system of pulse current, sintering is carried out for 5-25 minutes at the sintering temperature of 800-1000 DEG C and the sintering pressure of 30-400MPa, and therefor the ti-based high temperature alloy with high toughness in the bi-state structure is obtained.

The invention relates to a method for preparing ceramic tiles from calcium silicate slag, belonging to the field of comprehensive utilization of resources and novel technologies for ceramic preparation. The ceramic tiles contain the following raw materials in percentage by weight: 30-60% of calcium silicate slag, 10-30% of clay, 2-25% of quartz, 0-20% of feldspar, 0-10% of pyrophyllite, 0-10% of green coke and 0-10% of talc. According to the method, ceramics are produced from calcium silicate slag, so that the stacked discharge of calcium silicate slag is reduced, the aim of resource recycling is achieved, and a new way for the high-added-value utilization of calcium silicate slag is added; the utilization ratio of calcium silicate slag in calcium silicate slag ceramics can reach 60%; by using the characteristic that a great deal of alkali metal ions are contained, a feldspar raw material can be replaced partially or totally, and the ceramic tiles are produced under the low-temperature condition of 1,130-1,180 DEG C; all properties of the ceramic tiles prepared by the method disclosed by the invention are better than the national ceramic standards.

The invention discloses a method of preparing sheet-like carbonyl iron powder with plasma assisted ball milling. The method includes the steps of: (1) under protection with inert gas, dry-milling carbonyl iron powder with average particle size being 5-200 [mu]m by a plasma assisted ball milling machine to produce multilayer sheet-like carbonyl iron powder being less than 100 [mu]m in particle size; and 2) dry-milling the multilayer sheet-like carbonyl iron powder through planetary ball milling to obtain secondary sheet-like carbonyl iron powder with average particle size being 2-50 [mu]m. The method is high in purity and activity of the product, has advantages in industrial promotion, achieves effective controllability of sheet size and has important significance in preparation of high-performance magnetic wave-absorbing materials.

The invention relates to a ceramic raw material independent-grinding centralized preparation technique and device and belongs to the technical field of ceramic raw material preparation. The ceramic raw material independent-grinding centralized preparation technique comprises the steps that firstly, various single kind of raw materials are crushed independently through a crusher; secondly, the crushed single kind of raw materials are conveyed to a ball mill for continuous ball milling; thirdly, the raw materials subjected to ball milling and mud are conveyed into a slurry mixing and storing tank according to a formula to be evenly mixed; and finally, evenly-mixed finished slurry is conveyed to a drying tower to be dried. The ceramic raw material independent-grinding centralized preparation device comprises a hard material treatment device, a mud treatment device and a slurry drying device. By the adoption of the technique and device, the existing disorder situation of raw materials for processing ceramic can be avoided, and the technique and device have remarkable economic benefits.

The invention belongs to the field of titanium alloy materials, and discloses a double-scale structure titanium alloy based on in-situ whisker strengthening and toughening and a preparation method and application of the double-scale structure titanium alloy. The titanium alloy comprises elements including, by atomic percent, 58%-70% of Ti, 9%-16% of Nb, 4%-9% of Cu, 4%-9% of Ni, 2%-8% of Al and 0.5%-3% of B. According to a microstructure of the titanium alloy, part of ultra-fine grain fcc MTi2 is distributed along a micron grain bcc beta-Ti base body grain boundary in a long-strip-shaped manner, part of ultra-fine grain fcc MTi2 is distributed in the micron grain bcc beta-Ti in a long-strip-shaped manner, ultra-fine grain in-situ TiB whiskers are distributed in the ultra-fine grain fcc MTi2 and a micron grain bcc beta-Ti of the grain boundary, and M is equal to Cu and Ni. The fine-needle-shaped in-situ TiB whiskers are introduced in a double-scale structure of an ultra-fine grain second phase and a micron equiaxed grain base body, and further strengthening and toughening of the material are achieved.

The invention discloses a multifunctional ceramic composite additive, which is prepared by mixing layered crystalline sodium disilicate, modified 4A zeolite, sodium metasilicate, sodiumtripolyphosphate, sodium hexametaphosphate, polycarboxylate, sodium lignin sulfonate and sodium humate, has various functions of assisted grinding, slushing, plastifying and the like, and is suitable for preparation of ceramic mud added in various forming methods. The additive can lower the moisture content of the mud to 28-32%, improves the ball milling efficiency to a large extend, shortens the ball milling time by 20-30%, reduces the power consumption for raw material grinding by more than 40%, obviously enhances batch plasticity, increases the dried green strength of the product by 10-15%, and has the obvious functions of increasing production, saving energy and reducing consumption.

The invention discloses a milling process of a cashmere sweater product. The milling process comprises the following steps: preparing, immersing, milling, immersing, rinsing, dehydrating, drying over a fire, shaping by steam pressing and packaging. By simplifying the processing step, the milling time of the cashmere sweater is shortened, and the production efficiency is improved; meanwhile, the cashmere sweater product processed by the milling process disclosed by the invention is soft in hand feeling and attractive in appearance, so that the milling process is beneficial to improvement of the economic benefit; due to the adoption of an added quality inspecting step, a production process of the cashmere sweater product can be controlled effectively and the yield of the product is effectively improved.

The invention discloses a method for processing electronic ceramic casting slurry. The method comprises the following steps of: (1) sequentially adding a main solvent, a plasticizer, a surface lubricant and an adhesive into a ball-milling tank according to scheduled proportions, and performing ball milling for 2-4 hours; and (2) adding electronic ceramic powder in a scheduled proportion into the ball-milling tank, and continuously performing ball milling for 26-32 hours to obtain the electronic ceramic casting slurry, wherein the electronic ceramic powder is Al2O3 powder and accounts for 65-75% of the weight of the electronic ceramic casting slurry. According to the method, the main solvent, the plasticizer, the surface lubricant and the adhesive are added into the ball-milling tank once at first and are subjected to ball milling for 2-4 hours, then the electronic ceramic powder is added, and ball milling is continuously carried out for 26-32 hours, so that on the one hand, the ball milling time is greatly saved, and the preparation efficiency of the electronic ceramic casting slurry is improved.