479 results about "Wet grinding" patented technology

The invention discloses a pure bio-based PHA aqueous dispersion as well as a preparation method and application thereof, and belongs to the technical field of pure bio-based polymer aqueous dispersion. According to the dispersion, polyhydroxyalkanoate is used as a unique film forming matter, Pickering solid particles and a natural surfactant are adopted for synergistic stabilization, and a bio-based plasticizer can be selected. The emulsion or slurry with the polyhydroxyalkanoate content of 40-85wt% and the particle size of 0.2-3m is prepared through a melting high-pressure homogenization method, a low-temperature wet grinding method or a solvent replacement method. The coating does not contain petrochemical polymer protective colloid and perfluorinated and polyfluoroalkyl substances, and the bio-based content is greater than or equal to 99%. Due to the excellent stability, rheological property and film-forming property of the modified starch, the modified starch becomes an ideal basic material for constructing a multi-layer programmable controlled release and degradation functional coating system, can be used in the fields of paper-based barrier coatings, adhesives, advanced crop seed coats and the like, realizes excellent barrier, bonding and controlled release properties, meets the industrial compost and repulping property standards, and has wide application prospects. The method has green, environment-friendly and industrial potential.

The invention discloses a high-hardness tungsten carbide-cobalt hard alloy and a preparation method thereof. A production raw material formula comprises the following components in parts by mass: 100 parts of tungsten carbide powder, 6-20 parts of cobalt powder, 0.2-1.3 parts of a composite sintering aid, 0.5-4 parts of a wet grinding medium and 0.2-4 parts of a forming agent, the composite sintering aid is composed of rare earth oxide and cobalt phosphide according to the mass ratio of (1-5): 1. The method has the advantages that on the premise that the toughness of the tungsten carbide-cobalt hard alloy is slightly improved, the hardness and wear resistance of the alloy are remarkably improved, and the industrial problems that the hardness improvement of the tungsten carbide-cobalt hard alloy with a single sintering aid is limited and the toughness of the alloy is lost are solved.

The invention belongs to the field of hard alloy, and particularly relates to a preparation method for improving abrasion resistance of hard alloy and the hard alloy. The preparation method comprises the following steps that S1, superfine tungsten carbide, medium-particle tungsten carbide, cobalt powder and tantalum carbide are obtained; s2, superfine tungsten carbide, tantalum carbide and cobalt powder are mixed and then subjected to first wet grinding, and first slurry is obtained; s3, medium-particle tungsten carbide is added into the first slurry for second wet grinding to obtain second slurry, and the second slurry is dried and pressed to obtain a pressed blank; and S4, the pressed blank is subjected to first sintering, and then second sintering is conducted to obtain the hard alloy. The superfine tungsten carbide is added to promote complete development of tungsten carbide grains and reduce abrasive wear, the superfine tungsten carbide and the fine-particle cobalt powder are pretreated, and the two-stage sintering process is adopted, so that uniform distribution of a cobalt phase in the sintering process is improved, the bonding strength of the tungsten carbide grains and a cobalt phase interface is enhanced, and the wear resistance of the abrasive is improved. Therefore, wear resistance of the hard alloy is improved.

The invention belongs to the technical field of laser cladding, and particularly relates to a TiC-Fe-Cr coating powder material for an automobile brake disc and a preparation method and application of the TiC-Fe-Cr coating powder material. The coating powder material is prepared from 60%-80% of TiC powder, 15%-30% of Fe powder, 4%-11% of Cr powder and 0.8%-2.2% of polyethylene glycol through mixing, wet grinding, spray drying, compression molding, sintering crushing and spherical densification treatment, and the coating powder material is attached to the surface of the brake disc in a laser cladding mode. By utilizing the arrangement, the invention provides a coating powder material which solves the problem of lack of a special laser cladding material for an aluminum alloy brake disc and overcomes the technical bottlenecks that a traditional grey cast iron brake disc is heavy in weight, quick in abrasion, capable of generating dust and easy to rust and an aluminum alloy brake disc is low in hardness and poor in abrasion resistance.

The invention discloses a fly ash pretreatment method and a preparation method and application of an anti-corrosion and wear-resistant coating, and relates to the technical field of fly ash treatment, and the method comprises the following steps: s1, dispersing inferior fly ash in water, and then uniformly stirring to form ore pulp; s2, an emulsifying agent is dissolved in water, a collecting agent is added under stirring, and then an O / W type emulsifying collecting agent is obtained; s3, the prepared O / W type emulsifying collecting agent and foaming agent are added into the ore pulp, first-stage flotation solid removal treatment is conducted after sufficient stirring, and first-stage solid-removed fly ash is obtained; s4, drying the obtained first-stage solid-removed fly ash, and then carrying out second-stage electric separation solid-removed treatment to obtain second-stage solid-removed fly ash; and s5, adding a modifier and water into the obtained secondary solid-removed fly ash, carrying out wet grinding, taking out the fly ash after the modifier fully reacts with the fly ash, taking out the fly ash, drying the fly ash, and carrying out dry grinding to obtain the fly ash subjected to chambering modification. Therefore, the problem of incapability of direct resource utilization due to excessive impurity content of fly ash in the power plant in the prior art is avoided.

The invention belongs to the field of batteries, and particularly discloses a lithium manganese iron phosphate material as well as a preparation method and application thereof. The preparation method comprises the following steps: sequentially performing wet grinding and mixing, spray drying and first sintering on a lithium source, a manganese source, an iron source, a phosphorus source and a doping source to obtain an intermediate material; and carrying out ball-milling mixing and secondary sintering on the intermediate material, a forming aid and a carbon source to finally obtain the lithium manganese iron phosphate material. According to the method, the compaction density and the conductivity of the material can be improved at the same time, so that the specific discharge capacity, the efficiency and the cycle performance of the battery are improved.

The invention provides a red mud resource reutilization method which comprises the following steps: weighing raw materials according to the proportion of the raw materials, and grinding the raw materials into powder to obtain mixed powder; the raw materials comprise 70%-95% of matrix ceramic, 0.1%-30% of auxiliary ceramic and 0.1%-30% of red mud. Putting the mixed powder into a planetary ball mill, taking out after wet milling, and drying in a vacuum drying oven; crushing the dried powder by using a crusher, and screening by using a screen; the sieved powder is loaded into a graphite mold to be pre-pressed; and sintering the graphite mold filled with the green body in a discharge plasma sintering furnace. And cooling along with the furnace to obtain the red mud doped alumina-based composite ceramic material. According to the method for recycling the red mud, efficient utilization of the red mud is achieved, the red mud is combined with aluminum oxide and auxiliary ceramic, the red mud-doped aluminum oxide-based composite ceramic material is prepared through the processes of high-energy ball milling, spark plasma sintering and the like, and the prepared material has the advantages of being high in toughness, hardness and strength and the like.

The invention discloses a hydrogen storage alloy and a preparation method thereof, relates to the technical field of metal functional materials, and solves the problems of high reaction temperature and low hydrogen absorption and dehydrogenation rate of a magnesium-based hydrogen storage material in the prior art. The prepared hydrogen storage alloy comprises the following alloy components in parts by mass: 5-15 parts of nickel, 2-8 parts of yttrium, 2-8 parts of ytterbium, 68.8-91 parts of magnesium and 0-0.2 part of impurities. A magnesium ingot, a magnesium-yttrium alloy and a magnesium-ytterbium alloy are melted, then magnesium-nickel alloy is added, stirring is conducted till the magnesium-nickel alloy is melted, standing is conducted, and casting is conducted to obtain a hydrogen storage magnesium alloy cast ingot; the method comprises the following steps: crushing a hydrogen storage magnesium alloy cast ingot, loading into a stainless steel ball milling tank for dry milling, and adding a solvent into the tank body for wet milling after the dry milling is finished; and drying to obtain the magnesium alloy flaky powder. According to the invention, multiphase cooperation, structure regulation and interface optimization of multiple elements are utilized, so that the hydrogen absorption and desorption performance of the hydrogen storage material is obviously enhanced.

The invention discloses a three-dimensional wet grinding machine and method based on metal powder machining, and relates to the technical field of wet grinding machines, the three-dimensional wet grinding machine comprises a rack, a wet grinding tank is arranged at the top of the rack, two material ports are formed in the outer side of the wet grinding tank, the two connecting frames are both fixedly connected to the outer side of the wet grinding tank, and the two material ports are arranged in the wet grinding tank. The two connecting frames are rotationally connected with the rack, and a transmission device used for driving the connecting frames to rotate is arranged in the rack. After wet grinding is completed, powder slurry is discharged, then the traction piece drives the driving mechanism to ascend, a medium is forced to continuously penetrate through the driving mechanism, abraded grinding balls in the medium are discharged in batches through the screening piece, the abraded grinding balls in the wet grinding tank can be automatically screened out, and it is avoided that a large number of grinding balls need to be discharged; and after discharging, screening treatment is carried out, and the discharged materials are supplemented.

The invention discloses an efficient pollution-free treatment method for municipal waste incineration fly ash, and relates to the technical field of waste resource utilization and environmental protection. Comprising the following steps: S1, adding the garbage fly ash into a hydrochloric acid solution, carrying out wet grinding, and carrying out centrifugal separation to obtain heavy metal filtrate and heavy metal-removed fly ash; washing the heavy metal-removed fly ash with clear water to obtain a washing solution; mixing the washing liquid with the heavy metal filtrate to obtain a heavy metal solution; s2, adding a complexing agent into the heavy metal solution, stirring and mixing, standing overnight, performing centrifugal separation to obtain a heavy metal removal solution and a heavy metal complex, and adjusting the pH value of the heavy metal removal solution to be neutral to complete heavy metal removal treatment; s3, uniformly mixing the washed heavy metal-removed fly ash and a catalyst, performing low-temperature pyrolysis treatment, sieving and separating to obtain dioxin-removed fly ash, and completing dioxin removal treatment; and S4, the heavy metal removal solution and the heavy metal complex are treated, and garbage fly ash treatment is completed.

The invention discloses a method for jointly recovering zinc and cadmium from zinc-cadmium slag of zinc hydrometallurgy. The method comprises the following steps: S1, carrying out acid leaching on the zinc-cadmium slag and adding zinc powder for replacement; s2, sponge cadmium is subjected to vacuum melting; s3, adding clear water and calcium oxide into the cadmium alkaline residues for wet grinding, filtering to obtain clear liquid and filter residues, and returning sodium hydroxide obtained after the clear liquid is evaporated and crystallized to S2; s4, the filter residues are subjected to reduction roasting, recyclable zinc-cadmium smoke dust, calcium oxide residues and sulfur trioxide are obtained, the calcium oxide residues are returned to S3, sulfuric acid is prepared from sulfur trioxide, and a part of sulfuric acid is returned to S1; the other part of sulfuric acid enters the next step; s5, the smoke dust is dissolved with sulfuric acid, a sulfuric acid solution containing zinc and cadmium is obtained, then zinc powder is added for replacement, and sponge cadmium and a zinc sulfate solution are obtained; the sponge cadmium returns to S2, and the zinc sulfate returns to S1. According to the method, the cadmium alkaline residue treatment product can be effectively recycled and utilized, the cadmium alkaline residue treatment cost is reduced, no cadmium element flows out of the process to cause environmental pollution, and the method is an environment-friendly process method.

The invention discloses a method for preparing an underground cemented high-water-expansion filling material from negative carbon all-solid waste and application, the method comprises the following steps: raw material pretreatment: mixing magnesium slag, steel slag and a dispersion medium to prepare solid waste slurry, adding an inducer into the solid waste slurry, and carrying out wet ball milling treatment to obtain first slurry; wet grinding and carbonization: under the condition of continuously introducing CO2, carrying out wet ball-milling treatment on the first slurry to obtain second slurry; thickening and expansion regulation and control: adding a thickening agent and an expansion regulation and control agent into the second slurry, then carrying out wet ball milling treatment to obtain third slurry, mixing and molding, mixing the third slurry with a dispersion medium, gypsum and copper tailings, and carrying out vibration molding to obtain the underground cementing high-water-expansion filling material. The method takes industrial solid waste as a raw material, has double benefits of carbon sequestration and resource utilization, and is suitable for projects such as mine goaf filling and the like.

The invention relates to an alumina-zirconia eutectic sintering material and a preparation method thereof, and relates to the technical field of high-temperature structural ceramic materials. The preparation method comprises the following steps: dispersing 80-95 parts of aluminum oxide powder, 1-10 parts of zirconium oxide powder and 0.1-1 part of yttrium oxide powder in a solvent, and carrying out wet grinding and drying to obtain mixed powder; and adding 1-3 parts of a binder into the mixed powder, uniformly grinding, drying, carrying out compression molding, and carrying out SPS (spark plasma sintering) treatment to obtain the alumina-zirconia eutectic sintering material. The alumina-zirconia eutectic sintering material is obtained through raw material powder wet grinding, compact preparation and spark plasma sintering. The eutectic sintering material has the characteristics of high strength, high fracture toughness, good creep resistance and the like; the method is simple and easy to operate, green and environment-friendly, low in cost, short in process, high in efficiency and beneficial to industrial large-scale production and popularization.

The invention discloses a preparation method of high-purity lithium sulfide based on a carbon reduction method, and belongs to the technical field of material preparation. Comprising the following steps: S1, mixing anhydrous lithium sulfate with a reducing agent, and adding absolute ethyl alcohol as a solvent, S2, drying a material subjected to wet grinding, removing the absolute ethyl alcohol solvent and water, and transferring the material into a tubular furnace or an atmosphere sintering furnace to obtain a dried material; s3, the environment temperature in the furnace is increased to 600-800 DEG C at the heating rate of 5-12 DEG C / min, heat preservation is conducted for 30-60 min, and a reduction reaction is conducted; s4, after a reduction reaction product is cooled to the room temperature, adding absolute ethyl alcohol, stirring until the absolute ethyl alcohol is fully dissolved, completing solid-liquid separation through a suction filtration device, collecting filtrate and distilling; and S5, drying the distilled product to obtain the high-purity lithium sulfide. By accurately controlling the raw material purity, the reaction parameters and the purification process, the product purity is greater than or equal to 99.5%, the yield is greater than or equal to 89%, and the high-performance application requirements of solid-state batteries and the like are completely met; the method is simple in process steps, moderate in equipment requirements and suitable for large-scale industrial production.

The invention discloses a preparation method of a sodium ferric sulfate material for a sodium-ion battery with a high-stability structure, which comprises the following steps: S1, preparation of a precursor solution: carrying out wet mixing and temperature control dissolution on a sodium source, an iron source, sulfuric acid and an antioxidant to form the precursor solution; s2, preparation of an amorphous Na2Fe2 (SO4) 3 precursor: performing low-temperature evaporation to obtain the amorphous Na2Fe2 (SO4) 3 precursor; s3, preparation of a local crystalline state Na2Fe2 (SO4) 3 crystal: carrying out low-temperature calcination to form the local crystalline state Na2Fe2 (SO4) 3 crystal; s4, preparation of Na2Fe2 (SO4) 3 / C slurry: dispersing the local crystalline state Na2Fe2 (SO4) 3 crystals and a conductive agent in an organic solvent for wet grinding to form the Na2Fe2 (SO4) 3 / C slurry; and S5, carrying out temperature-controlled evaporation to form the Na2Fe2 (SO4) 3 / C composite material with a high-stability structure. The preparation method of the sodium ferric sulfate material for the sodium ion battery with the high-stability structure has the characteristics of high phase purity, high conductivity and excellent electrochemical performance.

The invention discloses a method for preparing YAG transparent ceramic by two-step sintering, which comprises the following steps: 1) weighing yttrium oxide powder and aluminum oxide powder according to a stoichiometric ratio, mixing, and carrying out solid-phase reaction to synthesize YAG powder; 2) performing dry grinding and wet grinding on the obtained YAG powder to obtain mixed slurry; 3) drying the obtained mixed slurry to obtain powder, and performing compression molding and cold isostatic pressing to obtain a ceramic biscuit; and 4) pre-sintering the obtained ceramic biscuit in an oxygen-containing atmosphere, embedding the pre-sintered ceramic with oxide particles, and carrying out hot isostatic pressing sintering to prepare the YAG transparent ceramic. On the basis of obtaining the YAG transparent ceramic with high optical quality, a microstructure with a fine grain size can be obtained, and good mechanical properties are considered; the preparation method is simple, the equipment cost and energy consumption are low, the traditional annealing step can be omitted, and a new thought can be provided for preparation of the high-performance YAG transparent ceramic.

The invention belongs to the technical field of medicine, and particularly relates to an aprepitant nanocrystalline composition and a preparation method and application thereof.The aprepitant and a sucrose solution are mixed, a stabilizer is added to obtain a solution to be ground, the solution to be ground is ground through a wet grinding process, and the aprepitant nanocrystalline composition is obtained; uniformly mixing the suspension with a spray drying protective agent and a flow aid to obtain a mixed solution, and drying and curing the mixed solution by adopting a spray dryer to obtain the aprepitant nanocrystal composition in the form of a dry suspension, and directly spray-drying the suspension, uniformly mixing the suspension with a skeleton agent and an adhesive, adding water to a constant volume, carrying out vacuum degassing, and carrying out pre-freezing and freeze-drying to obtain the freeze-dried orally disintegrating tablet type aprepitant nanocrystal composition.

The invention provides a preparation method of ammonium manganese phosphate, which comprises the following steps: reacting a manganese source, a phosphorus source and ammonia water to obtain crude ammonium manganese phosphate slurry; carrying out wet grinding on the obtained crude ammonium manganese phosphate slurry, and carrying out solid-liquid separation to obtain an ammonium manganese phosphate filter cake; and preparing the ammonium manganese phosphate filter cake into slurry again, supplementing phosphoric acid, heating for crystallization treatment, and performing post-treatment to obtain the high-purity ammonium manganese phosphate with high specific surface area. The preparation method is low in cost of required raw materials and simple in process, and the obtained ammonium manganese phosphate particles are fine, high in specific surface area and relatively low in impurity content. The invention also provides a lithium iron manganese phosphate material and a lithium ion battery prepared by taking the prepared ammonium manganese phosphate as a raw material, and lithium iron manganese phosphate synthesized by reacting the obtained ammonium manganese phosphate with other raw materials is high in compaction density and excellent in electrical property.

The invention relates to the technical field of hard alloys, and particularly discloses a ruthenium boride reinforced ultra-ultra coarse grain WC-Co hard alloy and a preparation method thereof in order to solve the problems of low strength and hardness and poor toughness of an ultra-ultra coarse grain alloy product caused by difficult control of grain size in an existing ultra-ultra coarse grain alloy preparation process. The ultra-coarse grain WC-Co hard alloy comprises the following raw materials: 0.5-5% of ruthenium-boron mixed powder, 5-10% of cobalt powder and the balance of tungsten carbide particles. Wherein the number ratio of ruthenium atoms to boron atoms in the ruthenium-boron mixed powder is 1: (0.5-1.5), and the carbon adjusting range of the total mass of tungsten and carbon in the tungsten carbide particles is 6.08-6.20 wt%. The problems that WC particles are excessively crushed and Co phases are non-uniformly distributed are solved by utilizing high-energy stirring dry mixing without adding a grinding body and combining a flexible wet grinding process with extremely short time and extremely low ball-to-material ratio, and Ru powder and B powder are introduced and combined with a special sintering process, so that the effects of high toughness, high hardness, high heat conductivity and the like of the ultra-coarse grain alloy are achieved.

The utility model discloses a wet grinding device for hard alloy production, which belongs to the technical field of hard alloy production and comprises a workbench and a grinding machine body. According to the wet grinding device for hard alloy production, the electric push rod, the grinding machine body, the clamping plate, the first threaded rod and the second threaded rod are arranged, and alloy objects of different sizes can be more effectively clamped and fixed through the effect that the second threaded rod drives the clamping plate to move; burrs and protruding parts on the surface of an alloy object are wet-ground through the action of a water spraying pipe and the grinding machine main body, the alloy object can be wetted and ground more comprehensively in cooperation with the action that a first threaded rod drives a sliding base to move and a rotating cylinder to rotate, and then the quality and attractiveness of a finished alloy object product are greatly improved; the working efficiency and the using efficiency of the wet grinding device are effectively improved, meanwhile, the working efficiency of people is improved, the using requirements of people are further met, and convenience is brought to work of people.

The invention discloses a superfine grinding and cooling process for producing a kaolin raw material. The superfine grinding and cooling process comprises the following steps: (1) pulping; (2) front-section wet grinding; (3) cooling: pumping the slurry A in the step (2) into a cooling tower for cooling through a slurry pump at the flow rate of 30-70m < 3 > / h to obtain slurry B with the temperature of 30-45 DEG C and the mass concentration of 35-45%; and (4) carrying out rear-section wet grinding. The superfine grinding and cooling process for producing the kaolin raw material has the beneficial effects that the particle collision requirement of superfine grinding is met, the consumption of a dispersing agent is reduced due to low temperature, the total consumption of the dispersing agent is finally reduced, the use cost of the raw material is further reduced, the service life of rear-section wet grinding equipment is prolonged, the maintenance cost is reduced, and the service life of the kaolin raw material is prolonged. And the granularity D92 of the slurry is less than 2 microns, less impurities are introduced, and the qualified rate of the product is more than 95%.

The invention provides a coffee bean extraction method, a coffee product and application. The method comprises the following steps: performing graded wet grinding, low-pressure fluid jet crushing and vacuum degassing treatment on a mixture of coffee beans and water to obtain first coffee pulp; performing ultrahigh-pressure jet crushing treatment on the first coffee pulp to obtain second coffee pulp; wherein the pressure of the ultrahigh-pressure spraying, impacting and crushing treatment is 60-150 MPa, and the fluid flow is 800-1000 L / h; the fineness of the second coffee pulp is 10-60 [mu] m. The coffee product obtained by the method disclosed by the invention is high in yield and good in aroma, flavor and consumer preference.

The utility model provides a dual-purpose semi-automatic tool sharpener which comprises a frame, an abrasive belt grinding mechanism, a millstone grinding mechanism and a water tank are installed on the frame, a driving shaft and a tensioning shaft are arranged on the frame in parallel, a grinding abrasive belt is wound on the driving shaft and the tensioning shaft, one side of the driving shaft extends outwards and is provided with a driven chain wheel, and the other side of the driving shaft is provided with a driven chain wheel. A motor is installed on the frame, a driving chain wheel is installed on an output shaft of the motor, the driving chain wheel and a driven chain wheel are in transmission through a chain, the millstone polishing mechanism is installed on the side face of the frame, a sliding groove is fixedly formed in the position, on one side of the chain wheel, of the frame, and a sliding block is installed in the sliding groove and protrudes out of a strip-shaped hole to form a protruding shaft. An eccentric shaft is arranged on the outer side face of the driven chain wheel, and a driving rod is installed between the eccentric shaft and the protruding shaft. According to the dual-purpose semi-automatic tool sharpener, an abrasive belt grinding system and a grinding stone grinding system are integrated, the water tank is arranged in the dual-purpose semi-automatic tool sharpener to achieve wet grinding, the tool sharpening efficiency is remarkably improved, and a blade is protected.

The present application belongs to the technical field of aluminate binder production, and particularly relates to a preparation method of aluminate binder. Main raw materials of aluminum hydroxide, calcium chloride, calcium oxide and aluminum oxide are used, accurate and fine batching is carried out according to the corresponding chemical composition of the mineral phase composition, and wet grinding is carried out by using a ceramic grinding process, so that the super-micro powder raw material with extremely high fineness and extremely high homogenization degree can be obtained. After the powder is subjected to pressure filtration separation, the powder is subjected to drying treatment, and then the automatic forming equipment is used to press the raw material blank into the tunnel kiln for calcination. After the calcined blank is crushed and ground, the aluminate binder is finally prepared.

The invention belongs to the technical field of industrial solid waste recycling and filling materials, and particularly discloses a method for improving pozzolanic activity of water-quenched copper slag through synergistic modification of magnetic separation iron removal, which comprises the following steps: adding CaO into molten copper slag discharged in a copper smelting process, uniformly mixing, reacting in an oxygen-containing atmosphere, and then carrying out water quenching and quenching to obtain the pozzolanic activity of the water-quenched copper slag. Modified copper slag particles are obtained; the modified copper slag particles are subjected to wet grinding and drying, and modified copper slag powder is obtained; and the modified copper slag powder is subjected to magnetic separation, and magnetic iron ore concentrate and non-magnetic tailings are obtained. The prepared non-magnetic tailings replace part of cement to prepare the auxiliary cementing material with high pozzolanic activity. Through the synergistic effect of CaO modification and a magnetic separation iron removal process, the pozzolanic activity of the water-quenched copper slag is remarkably improved. The method is simple and convenient in process, the high value-added application way of the water-quenched copper slag is effectively widened, the resource utilization rate is increased, and the method has important significance on promoting comprehensive utilization of solid waste and environmental protection.

The invention discloses a magnetic separation, enrichment and recovery process for low-grade vanadium titano-magnetite, which belongs to the technical field of comprehensive utilization of vanadium titano-magnetite, adopts a combined mineral separation process of dry pre-enrichment and tailing discarding, wet grinding, concentration and refinement, combination of gravity and magnetism and middling retreatment, selects mature industrial equipment and optimizes the combination. High-efficiency dry pre-selection equipment, wet grinding equipment, a multi-section reselection and middling retreatment system and solid-liquid separation equipment are utilized, a large amount of tailings are discarded at the front end of a mine, iron and titanium are efficiently separated and comprehensively recycled in the middle main process, the recycling rate bottleneck is broken through through the middling retreatment technology, near-zero discharge of wastewater is achieved, and compared with a conventional process, water can be saved by 50-60%, and the economic benefit is high. According to the method, the grinding and separation cost is saved by 60-70%, the energy-saving effect is remarkable, the purposes of cost reduction, efficiency improvement, comprehensive utilization of resources and clean production are achieved, the production and technical problems of low-grade vanadium titano-magnetite mine enterprises in arid and water-deficient areas are effectively solved, and the method is suitable for large-scale production and application.

The invention relates to a high-temperature alloy-Ti (C, N) composite metal ceramic material and a preparation method thereof, and belongs to the technical field of metallurgy. The preparation method comprises the following steps that S1, high-temperature alloy powder and Ti (C, N) ceramic powder are subjected to dry grinding, ultrasonic dispersion, wet grinding and drying, and metal ceramic powder is obtained; and S2, the metal ceramic powder is subjected to two-way pressing, vacuum sintering and cooling, and the high-temperature alloy-Ti (C, N) composite metal ceramic material is obtained. The high-temperature alloy-Ti (C, N) composite metal ceramic material prepared by the method has excellent high hardness, obdurability and high-temperature resistance, has outstanding room-temperature and high-temperature mechanical properties, and can meet the strict requirements of extreme working conditions and high-speed cutting on the comprehensive properties of the material.

The invention discloses a low-cost preparation method of an ardealite-ferronickel slag high-early-strength low-carbon cementing material. The method comprises the following steps: respectively carrying out wet grinding treatment on a mixture of ferronickel slag, ardealite and quick lime for 5-6 hours at the rotating speed of 400 rpm, and adding 1.5-2% of a water reducing agent, so as to obtain mixed ardealite slurry with median particle sizes D50 of 3.5-4.5 microns and D50 of 2-3 microns; and mixing and stirring 50% of nickel-iron slag slurry, 40% of phosphogypsum and quicklime co-wet-ground mixed slurry and 10% of ordinary Portland cement in a stirrer to obtain the high-early-strength and high-dosage phosphogypsum-nickel-iron slag-based cementing material. The ardealite-ferronickel slag high-early-strength low-carbon cementing material is prepared, a new building material is provided for the building material market, and a new way is found for solid waste resource utilization of ardealite and ferronickel slag.

The invention relates to the technical field of deep processing of natural products, in particular to water-soluble turmeric with low hygroscopicity and high stability and a preparation method and application thereof. The preparation method comprises the following steps: mixing and cross-linking a curcumin-ethanol solution and a chitosan-acetic acid solution, and drying to obtain curcumin-chitosan compound nanoparticles; and adding the nano-particles into a wall material solution containing starch sodium octenylsuccinate, maltodextrin, high-branched-chain cyclodextrine and hydroxypropyl starch, emulsifying, homogenizing at high pressure, performing wet grinding and drying to obtain the water-soluble turmeric with low hygroscopicity and high stability. The prepared product is good in water solubility, high in turmeric content, good in stability, not prone to moisture absorption and caking in the high-temperature and high-humidity environment and good in fluidity, solves the problems of moisture absorption, caking and the like of water-soluble powder turmeric products after being transported for a long time in the high-temperature and high-humidity environment, and is suitable for the fields of food, medicine, cosmetics and the like.

An aqueous suspension of a mineral material, for example calcium carbonate, may be prepared by wet grinding in the presence of an aqueous dispersion of (meth)acrylic polymer neutralized by a combination of at least one monovalent ion and at least one divalent ion. Such an agent may be used for facilitating grinding and such a mineral suspension may be used for preparing a mass filler for the preparation of paper, for preparing a paper coating slip, or for preparing a coating composition.