13results about How to "Eliminate agglomeration" patented technology

The invention discloses photocuring 3D printing metal slurry and a preparation method thereof.The photocuring 3D printing metal slurry is prepared from, by mass, 30%-77% of organic monomers, 0.001%-20% of dispersing agents, 0.1%-6% of photoinitiators and 10%-67% of composite powder; the composite powder comprises an organic shell and a metal core. The compatibility of an organic matter shell and an organic monomer of the composite powder in the slurry is better, and the chemical interaction force of the surface is larger, so that the dispersion of the composite powder in an organic monomer solution is promoted, and good stability is provided for the photocuring slurry; the refractive index of the organic matter serving as the shell is close to the refractive index of the organic monomer solution, the refractive index difference between the powder and the organic monomer solution is reduced, the curing thickness of the slurry is greatly increased, and the stable photopolymerization slurry with the good curing characteristic is obtained.

The invention discloses a high-activity modified volcanic rock powder admixture and a preparation method thereof. The high-activity modified volcanic rock powder admixture is prepared from the following raw materials in parts by mass: 120-180 parts of volcanic rock powder, 20-40 parts of slag powder, 3-7 parts of quicklime powder, 5-18 parts of desulfurized gypsum, 3-5 parts of sulphoaluminate cement clinker and 0.4-1.2 parts of a grinding aid. The volcanic rock powder, the slag powder, the quicklime powder, the desulfurized gypsum, the sulphoaluminate cement clinker and the grinding aid are compounded, through modification, the activity index of the volcanic rock powder can be stably increased to 70% or above, the highest activity index can reach 85% or above, and the activity index of the volcanic rock powder is superior to that of II-grade fly ash for concrete; the modified volcanic rock powder can serve as a mixed material to be directly mixed with powder materials such as ground clinker and gypsum in a mixing mode to prepare portland pozzolana cement, the modified volcanic rock powder can also completely replace current II-grade fly ash to serve as an admixture to be applied to preparation of concrete, and the effect of the modified volcanic rock powder reaches and is superior to that of the original II-grade fly ash.

The invention discloses a high-activity modified volcanic rock powder admixture and a preparation method thereof. The high-activity modified volcanic rock powder admixture is made of the following raw materials in parts by weight: 120-180 parts of volcanic rock powder, 20-40 parts of slag powder, 3-7 parts of quicklime powder, 5-18 parts of desulfurized gypsum, 3-5 parts of sulphoaluminate cement clinker and 0.4-1.2 parts of grinding aid. The invention compounds volcanic rock powder, slag powder, quicklime powder, desulfurized gypsum, sulphoaluminate cement clinker and grinding aid. Through modification, the activity index of the volcanic rock powder can be stably increased to more than 70%, and can reach more than 85% at most, which is better than the activity index of Class II fly ash for concrete. The modified volcanic rock powder can be used as a mixed material to be directly mixed with powder materials such as ground clinker, gypsum, etc. to prepare volcanic ash silicate cement, and can also completely replace the current Class II fly ash as an admixture for concrete preparation, and the effect reaches and is better than the effect of the original Class II fly ash.

The utility model discloses a precise lubricating oil blending and weighing device, which comprises a mixing mechanism and a weighing mechanism arranged above the mixing mechanism, an angle adjusting mechanism is connected below the mixing mechanism, the mixing mechanism comprises a mixing barrel, the weighing mechanism comprises a weighing cylinder, a weighing disc is rotatably connected above the inside of the weighing cylinder, and the angle adjusting mechanism is connected with the weighing disc. A weighing sensor is arranged on the lower portion in the weighing disc, one side of the weighing cylinder is rotationally connected with a first electric push rod, and a telescopic rod of the first electric push rod extends into the weighing cylinder and is rotationally connected with one side of the weighing disc. The device has the advantage of quantitative weighing, and solves the problems that part of blending and weighing devices are inconvenient to quantitatively weigh, lubricating oil is inconvenient to quantitatively add, the component proportion of each batch of lubricating oil is different due to inaccurate quantification, the performance stability and consistency of a final product are influenced, and the high-standard quality requirement is difficult to meet.

The present application relates to the technical field of collagen, in particular to a kind of active collagen lyophilized preparation and its preparation method and application.The preparation method includes the following steps: S1, the aqueous solution of freeze-drying protective agent is prepared;S2, the initial emulsion of active collagen is diluted with physiological saline, to obtain the first solution, then mixed with the aqueous solution obtained in step S1, to obtain the second solution;S3, the second solution obtained in step S2 is added to the aqueous solution of step S1, and the third solution is prepared after mixing and emulsifying, to obtain mixed emulsion;S4, the mixed emulsion in step S3 is filled and freeze-dried, wherein the freeze-drying protective agent includes glycine, and the concentration of active collagen in the third solution is 5-15 mg / mL.The lyophilized preparation prepared by the preparation method has excellent reconstitution effect, and is convenient for transportation and storage.

The utility model relates to the field of 3D printing, in particular to plastic additive powder anti-agglomeration mixing equipment which comprises a bottom plate, a lifting assembly is arranged on the bottom plate, and a mixing assembly is arranged on the lifting assembly; according to the anti-agglomeration mixing equipment for the plastic additive powder, through the arrangement of the mixing assembly, the scheme adopts a multi-motor cooperative driving composite motion mechanism, a second motor drives a stirring frame to realize shearing and convection dispersion of materials in a barrel, and a first motor drives a rotating frame and the mixing barrel to rotate, so that space migration and collision of the materials are enhanced; the third motor enables the rotating frame to rotate reversely through the chain wheel and the transmission chain, and a multi-dimensional complementary movement track is formed. The multi-shaft linkage mode effectively breaks through the limitation of traditional single-shaft stirring, the dispersion efficiency and uniformity are remarkably improved, and the agglomeration phenomenon is efficiently eliminated by strengthening friction and collision among particles, so that the mixing quality of the plastic additive powder is ensured to meet the high-standard process requirement.

The invention discloses a preparation method of a carbon-based nano LiFePO4 composite positive electrode material, which comprises the following steps: carbonizing walnut shells, ginkgo leaves and bamboo powder biomass as raw materials in a tubular furnace at 300-600 DEG C in an inert atmosphere for 0.5-3 hours, and removing volatile substances to obtain a biomass carbon source; naCl-KCl (the molar ratio is 1: 1) is used as a molten salt medium, Na2CO3, K2CO3 and KOH are used as pore-forming agents, the mass ratio of the pore-forming agents to reactants is 0.3-3, and the porous carbon-based material is prepared at the temperature of 800-1300 DEG C in a tubular furnace under the inert atmosphere. The walnut shells, ginkgo leaves and bamboo powder carbon materials are adopted as raw materials, the production cost of the carbon-based-nanometer LiFePO4 composite positive electrode material can be greatly reduced, biomass is used as a carbon source, and the current lithium ion battery development trend is met.

The utility model provides a high-speed mixing machine. The high-speed mixing machine comprises a mixing machine body, a first screen and a pneumatic assembly, wherein a mixing cavity is formed in the mixing machine body, and a plurality of air inlets are formed in the cavity wall of the mixing cavity; the first screen is arranged in the mixing cavity and divides the mixing cavity into a feeding cavity and a stirring cavity, the feeding cavity is located above the stirring cavity, part of the air inlets are formed in the cavity wall of the feeding cavity, and the other part of the air inlets are formed in the cavity wall of the stirring cavity; the pneumatic assembly comprises a gas supply part, a main gas conveying pipe and a plurality of branch gas conveying pipes, a gas outlet of the gas supply part is communicated with the main gas conveying pipe, the main gas conveying pipe is communicated with the branch gas conveying pipes, the number of the branch gas conveying pipes is the same as that of the gas inlets in a one-to-one correspondence mode, and the branch gas conveying pipes are communicated with the corresponding gas inlets. And the rubber filler can be quickly dispersed and fed into the stirring cavity from the feeding cavity through the gas, so that the screening effect of the first screen on the small-particle-size filler is enhanced, and the mixing efficiency of the high-speed mixer on rubber components is improved.

The application discloses a high-adhesion ink composition and a preparation method thereof, which comprises a polyurethane core-shell hybrid resin, a binary chlorovinyl resin, a bio-based mixed solvent, an inorganic mixed pigment composed of titanium white and barium sulfate, and a hybrid resin film layer with a mass fraction of 3-8% on the surface of the inorganic mixed pigment. The application adopts low-VOC bio-based raw materials, the bio-carbon content is greater than or equal to 60%, the ISCC low-carbon certification is met, and the ink is biodegradable. The core-shell hybrid resin and the binary chlorovinyl resin are synergistically film-formed, and the coating pull-off adhesion is good. The titanium white and the barium sulfate are compounded at a ratio of 1:1 and are pre-coated and modified, so that pigment aggregation is avoided, the ink dispersion fineness is less than 8.0 microns, and the cost is effectively controlled. The ink coating-4 cup outflow time is less than 35 seconds. The glass beads with a diameter of 2-3 mm are used for grinding, the process is simple, the raw materials are easy to obtain, batch production is suitable, and the application can also be used for high-end environmental protection printing of plastic film.

The invention discloses a nano-hydroxyapatite dispersion liquid and an application thereof. Slowly adding the sodium carboxymethyl cellulose solution into the nano-hydroxyapatite solution, stirring at normal temperature, adjusting the pH value to 9.0, and heating for reaction to obtain the nano-hydroxyapatite dispersion liquid. The mass concentration of the sodium carboxymethyl cellulose solution is 0.5 wt%, and the concentration of the nano-hydroxyapatite solution is 0.3 g / L-0. 6 g / L. According to the preparation method, the dispersity and the particle uniformity of the nano-hydroxyapatite are improved, the particle size is reduced, the agglomeration phenomenon of hydroxyapatite particles in a dispersion medium is effectively eliminated, the nano-hydroxyapatite dispersion liquid which is high in dispersity, high in stability, safe and non-toxic is obtained, and the technological process is simplified. Most importantly, compared with an original method for improving dispersity by adding a dispersing agent in the synthesis process, the problems that the content of nano-hydroxyapatite dispersed by the original method is low, the synthesis process is complex, and transportation and practical application are inconvenient are solved.

The present invention provides a method and device for separating magnetic substances in silicon-based negative electrode materials. The method for separating magnetic substances in silicon-based negative electrode materials of the present invention comprises the following steps: S1, obtaining powder to be separated; S2, crushing the powder by airflow blowing; S3, separating the magnetic substance in the powder by electromagnetic adsorption; S4, obtaining the separated powder, and circulating S2 and S3 to separate and process the powder multiple times. The method for separating magnetic substances in silicon-based negative electrode materials of the present invention can completely eliminate the agglomeration phenomenon in the powder, expose the magnetic substances, improve the effective adsorption rate of the magnetic substances, and further improve the accuracy of quantitative analysis and testing of magnetic substances.

The utility model provides a mixing device for processing a composite flame retardant, which relates to the technical field of mixing devices and comprises a rotating mechanism, and a stirring mechanism is fixedly mounted at the top of the rotating mechanism and comprises a group of springs II. According to the flame retardant mixing device disclosed by the utility model, under the matching of the stirring mechanism and the rotating mechanism, firstly, the second motor operates to stir flame retardant materials, secondly, the first motor operates to drive the connecting frame to rotate, so that the stirring mechanism rotates, and materials in the mixing device can rotate and roll in all directions through the matching of the first motor and the rotating mechanism; therefore, full contact and mixing among materials are ensured, layering and agglomeration phenomena among the materials can be eliminated, various components of the flame retardant can be uniformly distributed, the material mixing effect can be remarkably improved, efficient material mixing is realized, the operation process is simplified, and the safety is improved; the vibration amplitude and the noise level of the device are reduced, and the comfort of the working environment is improved.

The present invention provides a Mo-Cu alloy preparation method based on surface coating technology and flame spraying technology, comprising the following steps: S1: ammonium tetramolybdate powder and copper nitrate powder are mixed in mass ratio, added to ammonia and deionized water mixture and continuously stirred and heated; S2: the reaction product is washed with deionized water and separated, the reaction product is washed with anhydrous ethanol and heated and dried, and the reaction product powder after drying is subjected to a calcination experiment to prepare a Mo-Cu composite powder with a Mo coating layer; S3: the prepared Mo-Cu composite powder with a Mo coating layer is sprayed on the surface of the substrate by oxygen-acetylene flame spraying technology, and multi-layer spraying accumulation is performed; S4: the prepared Mo-Cu alloy is subjected to hydrogen reduction experiment and vacuum sintering experiment to prepare a high-density Mo-Cu alloy. The Mo-Cu alloy prepared by the present invention has a high density, can realize process parameter optimization and regulation of organization and performance, improve the interfacial bonding strength between particles and optimize control.