58 results about "Wet-milling" patented technology

Disclosed are a filling curing agent for preparing mine superfine tailing slag from solid waste residues, which belongs to the field of preparation of solid waste residues. The filling curing agent comprises a cementing material component obtained by means of a wet milling process while grinding, and an exciting agent component obtained by means of a mixing and stirring process; the cementing material component comprises, in parts by mass, 45-50 parts of blast furnace slag powder, 35-40 parts of steel slag powder, 15-20 parts of coal ash and 53.8 parts of water, and the exciting agent component comprises 100 parts of desulfurized gypsum powder and 59.5-60.6 parts of an activating agent; and the weight of the exciting agent component accounts for 10-15% of the weight of the filling curing agent. The filling curing agent disclosed in the present invention has low filling cost, high filling body strength and good durability, which reduces the occupation of land resources, reduces the impact on the ecological environment and residents' lives, realizes a virtuous cycle of mining and filling, and has good industrial prospects and social benefits.

The present disclosure relates to the technical field of powder metallurgy, especially to a coarse grain cemented carbide and a preparation method thereof. Pseudo particles in coarse grain tungsten carbide are removed by pretreating process. Broken of the coarse grain tungsten carbide in traditional wet milling is avoid by solid-liquid stirring, spay granulating and surface covering, which also guarantee the uniform distribution of PEG and cobalt salt. Transformation from cobalt salt to cobalt is safely and effectively guaranteed by performing two sintering stages with different atmosphere and temperature to obtain a WC—Co mixture material. By performing spark plasma sintering process, the precipitation of nano fine grain tungsten carbide guarantees regrowth of defect occurred in pretreating process. The coarse grain cemented carbide with the average grain size of WC above 10 μm, the uniform cobalt phase distribution and be bending strength not less than 2200 MPa is prepared.

A dispersion, methods of making the same, applications of the dispersion to graphitic material and the resulting coated particles are disclosed. The dispersion includes ≤55% wt. coal tar pitch (softening point 100° C.-95° C.), ≤60% wt. dispersant, and the balance a non-aromatic solvent such as water or alcohol. Pitch particles in the dispersion are preferably ≤10 μm with a distribution of D50<15 μm. The pitch particles are micronized, such as by dry and / or wet milling with the dispersant and aqueous solvent to achieve the desired pitch particle size and distribution. This aqueous dispersion may be mixed with natural or synthetic graphitic material having a diameter of 5-20 μm in a ratio of 5%-30% pitch to graphite, dried and carbonized to form coated particles having a graphitic core at least partially coated by pitch particles.

The invention discloses an architectural ceramic wetting and powdering production system, which relates to the technical field of ceramic production systems, and comprises two main process links of dry grinding and fine powder wetting, and wet ball milling and fine powder wetting. Wherein dry grinding comprises a raw material storing and batching device, raw materials in the raw material storing and batching device are classified through dry and wet raw materials, hard stone raw materials are fed into a column crusher to be crushed, and a vertical mill or a dry ball mill is selected according to the comprehensive moisture difference of the raw materials in the formula; a feeding machine in the wet ball milling is communicated with a wet ball mill, the wet ball mill is communicated with a slurry tank, and powder in the slurry tank is treated to obtain dry fine powder; fine powder wetting comprises a wetting tower, powder of the wetting tower is fed into a drum screen, and the drum screen feeds the powder into a self-flowing type powder waking bin. According to the invention, the selection of the vertical mill or the dry ball mill can be determined according to the water content in the raw material formula, and the dry fine powder is wetted by the wetting tower, so that compared with a traditional wetting mode, the wetting tower can more uniformly wet the dry fine powder.

To provide a silicon nitride-containing fine powder production method that enables more efficient production of silicon nitride-containing fine powder than conventional methods, and to provide silicon nitride-containing fine powder produced by the method.SOLUTION: A method of producing silicon nitride-containing fine powder includes wet milling of a coarse powder containing silicon nitride by feeding it into a media agitation mill, the silicon nitride-containing fine powder having an average particle size of 1 μm or less, wherein the effective power consumption of the media agitation mill in the wet milling is 0.1 kWh / kg or more and 1 kWh / kg or less.SELECTED DRAWING: None

The utility model discloses a control system for a wet-method pulverizing production line, which relates to the technical field of mechanical pulverizing equipment and comprises an industrial personal computer and an industrial router connected with the industrial personal computer through Ethernet communication. The jaw crusher control component, the cone crusher control component, the transfer stock bin control component, the double-roller flour mill control component, the vibrating screen control component, the separating tower control component, the magnetic separator control component, the second dewatering screen control component and the first conveying belt control component are connected with the industrial router through Ethernet communication. A first conveying belt control component, a second conveying belt control component, a third conveying belt control component, a fourth conveying belt control component, a first conveying pump control component and a water spraying device control component; the device has the characteristics that the device is convenient to operate and control, one-key start, one-key stop and one-key sudden stop of the whole line can be realized, and the operation data of the whole line can be automatically stored; the device is matched with a wet-method pulverizing production line and is suitable for preparing mineral powder such as quartz sand powder, dolomite powder and calcium carbonate powder.

Disclosed is a method of manufacturing a sulfide-based solid electrolyte using wet milling. The method includes preparing electrolyte precursor materials; adding the electrolyte precursor materials and milling balls to a container; adding a nonpolar solvent to the container; milling the electrolyte precursor materials with the milling balls to synthesize a solid electrolyte; and removing the nonpolar solvent by filtration from the solid electrolyte.

The application provides a force-vibration-noise monitoring and prediction system for wet milling, which comprises an externally-mounted cutting fluid transmission system, a numerical control machine tool and workpiece system, a sound pressure and vibration measurement system, and a three-way force measurement system, can monitor and obtain three-way milling force signals, three-way vibration signals and milling sound pressure signals under given milling parameters. Based on experimental data and grey correlation theory, the correlation degrees of force, vibration and noise about milling parameters during wet milling are better than those during dry milling, which shows that the system has a certain optimization effect on the cutting state. Based on the response surface analysis method, the prediction models of force, vibration and noise about milling parameters and the comprehensive model of noise about force-vibration-milling parameters are established. The results show that the noise comprehensive prediction model established based on milling force-vibration is more reliable, and the correlation between milling force, vibration and milling noise is higher. The application can provide scientific guidance for the monitoring and prediction of the milling processing state.

A fire retardant formulation includes a first flame retardant agent consisting of corn syrup, com molasses, sorghum molasses, pomegranate molasses, carob molasses, date molasses, a waste concentrate of alcohol distilling industry, sacharinic acid, a lignosulfonate, steepwater solubles formed using a wet milling process for corn, whey, a wine-making residue, brewers' condensed solubles, desugared corn symp, desugared com molasses, desugared (brown) rice syrup, desugared maple symp, desugared sorghum molasses, desugared agave symp, desugared pomegranate molasses, desugared carob molasses, desugared date molasses and admixtures thereof exhibiting flame retardant properties, and a second agent selected from a group consisting of a flame retardant colorant, an additional flame retardant agent and mixtures thereof. A method of suppressing a wild fire or forest fire includes the step of applying an effective amount of the fire retardant formulation to (a) the wild fire, (b) the forest fire, (c) an area to be protected from the wild fire or the forest fire or (d) combinations thereof.

The invention relates to the technical field of hot isostatic pressing method powder metallurgy, and discloses a preparation method of an aluminum-based silicon carbide composite material. The preparation method of the aluminum-based silicon carbide composite material comprises the steps that silicon carbide particles are subjected to high-temperature oxidation, the high-temperature oxidation temperature ranges from 650 DEG C to 1500 DEG C, and the particle size of the silicon carbide particles ranges from 1 micrometer to 10 micrometers. And the silicon carbide particles subjected to high-temperature oxidation and aluminum alloy powder are subjected to ball milling mixing, a wet milling medium comprises absolute ethyl alcohol, and composite powder is obtained. And the composite powder is subjected to sheath degassing treatment, and the composite powder sealing sheath is obtained. And the composite powder is sealed and sleeved for hot isostatic pressing, and an aluminum-based silicon carbide composite billet is obtained. The wettability between the silicon carbide particles and the aluminum alloy interface is improved, the interface bonding force is improved, formation of an interface aluminum carbide brittle phase is prevented or reduced, meanwhile, the silicon carbide particles can be evenly dispersed and distributed in the aluminum-based material, and the mechanical property of the aluminum-based silicon carbide composite material is improved.

This application belongs to the technical field of cemented carbide materials, specifically a high-toughness WC-Co cemented carbide and its preparation method. The preparation method includes: using tungsten carbide powder, cobalt powder, tantalum carbide powder, boron source, and tungsten powder as raw materials; mixing and ball-milling all the boron source, tungsten powder, and part of the cobalt powder to obtain a first slurry; mixing and ball-milling all the tungsten carbide powder, tantalum carbide powder, and the remaining cobalt powder to obtain a second slurry; mixing the first slurry and the second slurry, ball-milling, drying, and pressing; and then sintering in three stages with increased temperature to obtain the WC-Co cemented carbide. This application, through the synergistic design of "pre-alloying wet milling" and "medium-temperature heat preservation," guides the uncontrollable boron diffusion reaction process into a directional and gradual reaction path of "B→Co2B→WCoB," thereby avoiding the formation of harmful phases such as brittle WB, optimizing the microstructure of the WC-Co cemented carbide, and improving its mechanical properties.

This invention discloses a method for processing cocoa beans or cocoa granules, comprising the steps of: (a) adding water to cocoa beans or cocoa granules to form a suspension; (b) wet milling the suspension; (c) subjecting the suspension to heat treatment at a temperature of 70°C or lower; (d) separating the suspension into: an aqueous phase (heavy phase), a lipid phase including cocoa oil (light phase), and a solid phase including cocoa powder and fluid components; (e) continuously separating the fluid components from the solid phase obtained in step (d) by supplying the solid phase to a mixing device to obtain cocoa aroma and cocoa powder; wherein the mixing device... The device includes: a cylindrical tubular body having a horizontal axis, the tubular body having an inlet opening for a solid phase, an outlet opening for a dried solid phase, and an optional outlet opening for a vapor phase including cocoa aroma; end plates closing the tubular body at opposite ends; a coaxial sleeve for heating or cooling the inner wall of the tubular body to a temperature of 55°C to 150°C; and a bladed rotor supported in the tubular body for rotation, the blades of the bladed rotor being arranged in a helical shape and oriented for centrifugally separating the solid phase and simultaneously transporting the solid phase toward the outlet opening.

The invention discloses expansin recombinant aspergillus niger suitable for liquid fermentation as well as a construction method and application thereof, and belongs to the technical field of recombinant microorganisms. The technical problem of efficiently degrading cellulose is solved. The invention provides a recombinant aspergillus niger, and the recombinant aspergillus niger is obtained by taking aspergillus niger TH-2-D as a starting strain and replacing a saccharifying enzyme gene glaA as shown in SEQ ID NO.31 with a penicillium oxalicum expansin Swo gene as shown in SEQ ID NO.28. The invention also provides a preparation method of the recombinant aspergillus niger. The strain is subjected to liquid state fermentation, fermentation liquor is suitable for fiber puffing application, the cellulose degradation efficiency can be improved when the strain is used in cooperation with cellulase, linked starch can be effectively removed when the strain is used in cooperation with corn wet grinding enzyme, and the starch yield is increased.

The present invention, relates to oat-based dispersions, to food products containing said oat-based dispersions, and to processes for forming the aforementioned products, wherein the processes include reducing the particle size of oat raw material, preferably by at least one of high-pressure homogenisation, microfluidization and wet milling.

The invention discloses a method for extracting lithium from lithium-containing resources, and belongs to the technical field of lithium extraction processes. The method comprises the following steps: firstly, mixing a lithium-containing material with composite salt to prepare powder, then pressing into blocks, roasting to obtain block materials, carrying out ball-milling crushing on the block materials, adding dilute sulphuric acid, carrying out wet milling, filtering to obtain filtrate, then measuring the concentration of each metal ion in the filtrate and combining related thermodynamic data, calculating the amount of a precipitant required by impurity removal and the optimal pH value of impurity precipitation, finally adding the precipitant into the filtrate according to a calculation result, adjusting the pH value, and filtering to obtain a purified lithium solution; according to the method, the composite salt and the lithium-containing material are jointly roasted, the roasting temperature is effectively reduced through low-melting-point persulfate, the energy consumption is reduced, the optimal impurity removal condition can be obtained innovatively through calculation, a large amount of early-stage exploration experiment cost and time are saved, and the method is suitable for industrial production. And the lithium element is retained to the maximum extent while the impurities are removed to the maximum extent, and the method has wide adaptability.

To provide a heat-conductive structure which is a structure containing fibrous carbon, and is not large in anisotropy of heat conductivity and is excellent in heat conductivity as a whole, and a heat-conductive structure which is excellent in heat conductivity and non-conductivity by developing an excellent carbon nanofiber as the fibrous carbon contained therein.SOLUTION: There are provided a heat-conductive structure such as a molding, a coated film, a sheet and an adhesive layer that contains a carbon nanofiber group and an isotropic heat-conductive filler in a base material, wherein the carbon nanofiber group is "50 number% or more of the whole carbon nanofiber group is distributed within a range of a diameter of 30 nm or more and 1,000 nm or less and a length of 0.2 μm or more and 70 μm or less", which contains pitch-based fibrous carbon as a raw material and is obtained by wet milling; and an adhesive, a coating material, a composition for preparing the structure, and a masterbatch which have the composition of the heat-conductive structure.SELECTED DRAWING: Figure 10

The application belongs to the technical field of hard alloy materials, and particularly relates to a high-toughness WC-Co hard alloy and a preparation method thereof, the preparation method comprising the following steps: adopting tungsten carbide powder, cobalt powder, tantalum carbide powder, a boron source and tungsten powder as raw materials; mixing, ball-milling all the boron source, the tungsten powder and part of the cobalt powder to obtain a first slurry; mixing, ball-milling all the tungsten carbide powder, the tantalum carbide powder and the remaining cobalt powder to obtain a second slurry; mixing the first slurry and the second slurry, and performing ball-milling, drying and pressing; then performing sintering in three stages to obtain the WC-Co hard alloy. Through the synergistic design of "pre-alloying wet milling" and "intermediate temperature holding", the uncontrollable boron diffusion reaction process is guided to a directional and progressive reaction path of "B->Co2B->WCoB", so that the formation of harmful phases such as brittle WB is avoided, the micro morphology of the WC-Co hard alloy is optimized, and the mechanical properties are improved.

This invention discloses a pure bio-based PHA aqueous dispersion, its preparation method, and its applications, belonging to the field of pure bio-based polymer aqueous dispersion technology. This dispersion uses polyhydroxyalkanoates (PHA) as the sole film-forming agent, synergistically stabilized by Pickering solid particles and natural surfactants, and can optionally incorporate bio-based plasticizers. It is prepared by melt high-pressure homogenization, low-temperature wet milling, or solvent displacement methods to obtain emulsions or slurries with a PHA content of 40–85 wt% and a particle size of 0.2 µm–3 µm. It is free of petrochemical polymer protective colloids and perfluorinated and polyfluoroalkyl substances, and has a bio-based content ≥99%. Its excellent stability, rheological properties, and film-forming properties make it an ideal base material for constructing multilayer, programmable controlled-release, and degradable functional coating systems. It can be used in paper-based barrier coatings, adhesives, and advanced crop seed coatings, achieving excellent barrier, adhesive, and slow-release properties. The products meet industrial composting and resizing standards, demonstrating green environmental protection and industrialization potential.

The invention relates to a high-purity aluminum oxide brick prepared from corundum-aluminum hydroxide-aluminum nitride ingredients and a production process thereof, the high-purity aluminum oxide brick adopts an overall gradient design, the gradient distribution is as follows: a 1 / 4L working layer A, a 1 / 4L gradient transition layer I B1, a 1 / 4L gradient transition layer II B2 and a 1 / 4L heat insulation layer C, the gradient transition layer I B1 is a mixed ratio of 2 / 3 of the working layer A and 1 / 3 of the heat insulation layer C by weight, and the gradient transition layer II B2 is a mixed ratio of 2 / 3 of the working layer A and 1 / 3 of the heat insulation layer C by weight; and the gradient transition layer II B2 is formed by mixing 1 / 3 of the working layer A and 2 / 3 of the heat insulation layer C according to the weight ratio. The preparation method comprises the steps of raw material weighing, wet grinding, forming, drying and high-temperature sintering, formed green bricks are dried for 48-72 h at the temperature of 120 DEG C, heat preservation is conducted for 7 days for 168 h at the temperature of 650 DEG C, heat preservation is conducted for 6-8 h at the temperature of 1750-1800 DEG C, and sintering is conducted. The obtained high-purity aluminum oxide brick is excellent in performance, high in bonding strength on the working layer A, the gradient transition layer I B1, the gradient transition layer II B2 and the heat insulation layer C, good in overall performance, low in heat conductivity coefficient and good in heat preservation performance.

The application discloses a building ceramic wetting and powdering square anti-sticking wetting tower, and belongs to the technical field of wetting towers for building ceramic production. The building ceramic wetting and powdering square anti-sticking wetting tower comprises a support, a storage bin, a high-frequency vibration powder distributing device, an upper powder cylinder and an anti-sticking cloth cylinder body are sequentially and fixedly connected to the support from top to bottom, the top end and the bottom end of the high-frequency vibration powder distributing device are respectively connected with the storage bin and the upper powder cylinder in a flexible mode, the high-frequency vibration powder distributing device is used for realizing uniform falling of powder by means of multi-stage powder dispersing action, the upper powder cylinder is internally provided with uniformly distributed spray rods, the spray rods are connected with a water tank through water supply pipes, the bottom surface of each spray rod is provided with a plurality of downwardly arranged spray heads, and the spray heads are uniformly distributed in the vertical projection of the anti-sticking cloth cylinder body. The building ceramic wetting and powdering square anti-sticking wetting tower adopts the above structure, the uniformity of powder distribution and wetting is improved, and the problems of wall sticking and blockage of the discharge opening of the wetting tower are solved.

This invention discloses an alkali-resistant and fire-resistant coating for building applications, its preparation method, and its application. The material is composed of the following raw materials in parts by weight: 20-60 parts aluminum tripolyphosphate, 20-40 parts water glass, 10-20 parts silica, 5-10 parts alumina, 1-5 parts kaolin, 1-5 parts zirconium oxide, 1-5 parts anhydrous calcium sulfate, 5-40 parts modifier, 2-8 parts binder, 1-2 parts curing agent, and 1-2 parts defoamer. The preparation method involves mixing aluminum tripolyphosphate and the modifier in a ball mill for 10-120 minutes to obtain modified aluminum tripolyphosphate; ball milling with alcohol and water as wet milling liquid for 60-720 minutes at a milling rate of 100-800 r / min; drying the mixture for 36-48 hours; then placing the other raw materials and the modified aluminum tripolyphosphate powder into a beaker, adding water glass solution, and stirring on a magnetic stirrer to obtain the target alkali-resistant and fire-resistant coating. The alkali-resistant and fire-resistant coating for building applications of this invention has excellent alkali resistance, good mechanical properties and fire resistance and flame retardancy, and the preparation process is simple and suitable for industrial production.

The invention discloses a purification and depolymerization treatment method of ceramic powder for photocuring molding. The method comprises the following steps: carrying out wet ball milling on ceramic powder and an organic solvent in proportion to realize preliminary mixing and impurity separation; then drying the ball-milling tank so as to thoroughly remove the organic solvent and preliminarily cure the powder; carrying out dry ball milling on the ball milling tank containing the dry powder again so as to effectively scatter agglomerates formed in the drying process; and finally, sieving the powder to obtain the high-quality ceramic powder which is uniformly dispersed, fine in particle size and capable of effectively removing surface polar ions. According to the method, cleaning, refining and depolymerizing of the ceramic powder are efficiently completed under the condition that complex centrifugal or filtering equipment is not needed through the synergistic process of wet grinding, drying and dry grinding, and the method is simple in process, low in cost and suitable for industrial production.

The present invention provides an edible product. The method for producing cocoa pod shell powder comprises the steps of: making cocoa pod shells into sheets; incubating pieces of cocoa pod shells in water; in the wet milling process, 0.25 L to 1 L of water is added per kg of the cocoa pod shells, so that the cocoa pod shells become a paste, and slices of the cocoa pod shells are not dried after the incubation and before the cocoa pod shells become the paste in the wet milling process; and drying the paste at a temperature of at least 80 DEG C.

The present invention relates to pea proteins with improved flavor, to a method for producing these pea proteins involving wet milling, and to the use of these proteins in food or pharmaceutical compositions.

A method for increasing starch yield and / or gluten yield from corn kernels in a wet milling process is disclosed, the method comprising contacting a fiber-rich fraction of the milled kernels with an effective amount of SO2 and an effective amount of one or more hydrolytic enzymes during a fiber washing step, wherein at least one of the hydrolytic enzymes is selected from xylanases and / or cellulases.

The invention provides a titanium alloy milling surface roughness prediction method based on Fe3O4 nano-particle reinforced cutting fluid. The titanium alloy milling surface roughness prediction method comprises the following steps: preparing the cutting fluid containing Fe3O4 nano-particles; establishing a milling force, milling noise and surface roughness acquisition system, and carrying out TC4 titanium alloy wet milling tests under different process parameters; drawing a change curve of milling force, noise and surface roughness test data, and comparing the performance difference before and after addition of the Fe3O4 nanoparticles; and constructing a prediction model based on a convolutional neural network and a relevance vector machine to realize accurate prediction of the surface roughness. The cutting fluid has the advantages that the Fe3O4 nanoparticles are added into the cutting fluid, so that the milling force and noise are remarkably reduced, the surface roughness is improved, and intelligent prediction of the surface quality can be effectively realized by combining experimental testing with a machine learning model.

An aqueous dispersion of graphene oxide is prepared in an additive process by subjecting graphitic carbon, such as biochar, in water or an aqueous solution to a high-shear environment in the presence of a dispersing agent to exfoliate graphene oxide. An intercalating agent may be added to facilitate exfoliation, and optionally neutralized. The graphitic carbon may be pre-processed by wet milling prior to exfoliation. The aqueous dispersion of graphene oxide may be used as a concrete admixture in a concrete composition.

The utility model relates to the technical field of preparation equipment of organic compound plant extracts, in particular to equipment for preparing ginseng extract nano powder, which comprises a bearing support, a reaction kettle is arranged at the top of the bearing support, and a ball mill component and an extracting and drying component are fixedly connected to the top of the bearing support. The second motor is used for driving the third gear and the fourth gear to be meshed so that ginseng materials input into the mill barrel can be subjected to ball milling through the mill barrel, ball milling can be used for dry milling or wet milling, operation conditions are good, smashing is carried out in a closed machine, dust flying is avoided, running is reliable, a grinding body in the mill barrel is cheap, and cost is low. The device is convenient to replace, intermittent operation and continuous operation can be achieved, the drying machine is utilized to conveniently and greatly dry ginseng materials in a trouble-saving and time-saving mode so as to facilitate discharging, the ultrasonic extraction mode of the ultrasonic extractor does not need high temperature, and ultrasonic intensified extraction is achieved in the process.

The invention relates to a cerium-stabilized zirconia bead and application thereof in the papermaking industry. The cerium-stabilized zirconia bead comprises the following components: 75-85 wt% of zirconia, 15-20 wt% of cerium oxide and 0.5-2.5 wt% of ferric oxide. Compared with the prior art, the cerium-stabilized zirconia bead has better high-temperature stability and thermal shock resistance, is suitable for a high-temperature grinding environment, and has higher toughness and impact resistance. The zirconium bead with the formula is particularly suitable for severe working conditions such as high-energy-density grinding and large-particle-size material crushing, the service life is longer, and the breakage rate is lower. The calcite is subjected to wet grinding, the abrasion value of 60-grade calcium carbonate is reduced to be within 5%, and the abrasion value of 95-grade calcium carbonate is reduced to be within 3%; and the service life of the coating scraper is prolonged.

The present disclosure relates to the technical field of powder metallurgy, especially to a coarse grain cemented carbide and a preparation method thereof. Pseudo particles in coarse grain tungsten carbide are removed by pretreating process. Broken of the coarse grain tungsten carbide in traditional wet milling is avoid by solid-liquid stirring, spay granulating and surface covering, which also guarantee the uniform distribution of PEG and cobalt salt. Transformation from cobalt salt to cobalt is safely and effectively guaranteed by performing two sintering stages with different atmosphere and temperature to obtain a WC—Co mixture material. By performing spark plasma sintering process, the precipitation of nano fine grain tungsten carbide guarantees regrowth of defect occurred in pretreating process. The coarse grain cemented carbide with the average grain size of WC above 10 μm, the uniform cobalt phase distribution and he bending strength not less than 2200 MPa is prepared.