969 results about "Granulation" patented technology

The invention provides, inter alia, a method for producing granules from a powder, characterized in that a low compaction force is applied to the powder to produce a compacted mass comprising a mixture of fine particles and granules and separating fine particles from the granules by entraining the fine particles in a gas stream. Also provided are apparatus for use in the process and tablets formed by compression of the resultant granules.

A method for manufacturing photocatalyst multifunctional dust-free active carbon color ball includes the steps of (1) compound-formulating and mixing 8%-15% attapulgite, 8%-15% sepiolite, 5%-10% mordenite and 50%-65% active carbon; (2) after step (1), granulating by adding 5%-10% photocatalyst and appropriate water and mixing; (3) after step (2), drying at 60° C.-80° C. and then grinding till the particle size is smaller than 200 meshes; (4) after step (3), compound-formulating and granulating by adding 5%-10% tourmaline powder and appropriate water; and (5) after step (4), drying at 150° C. and obtaining a product, wherein the percentage of every raw material is expressed by weight. The photocatalyst multifunctional dust-free active carbon color ball can strongly adsorb formaldehyde, benzene, ammonia, sulfur dioxide, carbon monoxide and other harmful toxic polar molecules, and has multiple functions of adsorption, decomposition, releasing negative ions, emitting far infrared, instead of the originally single adsorption function of active carbon.

The invention relates to a silicon-carbon cathode material with artificial SEI layers, high specific volumetric capacity and cycle performance and application of the silicon-carbon cathode material. The silicon-carbon cathode material is of an intermediate-phase graphite structure which is secondarily granulated, outer shell layers of the intermediate-phase graphite structure are amorphous carbon coating layers, inner shell layers of the intermediate-phase graphite structure are dense LiF membranes, and nanometer silicon is uniformly dispersed to form cores of the intermediate-phase graphite structure. A method for preparing the silicon-carbon cathode material includes steps of 1, crushing and shaping intermediate-phase graphite balls with large particle diameters to obtain intermediate-phase graphite micro-powder with median particle diameters of approximately 7 micrometers; 2, carrying out ball-milling dispersion on the nanometer silicon and the micro-powder obtained at the step 1; 3, uniformly mixing lithium acetate solution and materials obtained at the step 2 with one another; 4, carrying out dropwise addition reaction on NH4F solution and materials obtained at the step 3; 5, carrying out spray-drying on materials obtained at the step 4; 6, mixing PVDF (polyvinylidene fluoride) and materials obtained at the step 5 with one another to obtain mixtures and granulating and coating the mixtures; 7, immobilizing and carbonizing materials obtained at the step 6; 8, sieving materials obtained at the step 7. The silicon-carbon cathode material and the application have the advantages that the silicon-carbon composite cathode material is stable in cycle performance, high in specific volumetric capacity and easy to industrially produce; a lithium ion battery with a cathode which is processed from the silicon-carbon cathode material is high in specific volumetric capacity and excellent in cycle performance.

The invention relates to a method for preparing a magnetic charcoal material, a device adopting the method and application. The method comprises the following steps that sewage treatment plant sludgeis subjected to high-temperature anaerobic pyrolysis, and sludge charcoal is obtained; then dry fine grinding is carried out, and charcoal powder is obtained; the sludge charcoal powder is subjected to dry magnetic separation, a magnetic material is obtained, granules obtained after humidifying and pelleting are subjected to high-temperature sintering in protective atmosphere, and sintered materials are obtained; furnace cooling is carried out, and the magnetic charcoal material of a porous structure is obtained. According to the method, the magnetic material is separated out of the sludge pyrolysis product charcoal and is used for preparing the magnetic charcoal material, the magnetic charcoal material is used for efficiently adsorbing and removing quinolone antibiotics such as ciprofloxacin, recycling utilization of the sludge charcoal is achieved, the preparation cost of the adsorption materials is reduced, the process is simple, high practicality is achieved, and good economic benefits and environmental benefits are achieved.

The invention discloses a yttria stabilized zirconia powder with low impurity content and a preparation method thereof. The yttria stabilized zirconia powder is a composite powder with a nanostructured shell cladding nanometer particles. The preparation method comprises the following steps of: carrying out low temperature drying by the use of a nanometer YPSZ amorphous powder synthesized by a continuous coprecipitation method; carrying out ball milling dispersion on parts of the nanometer YPSZ powder which has undergone crystalline conversion, and carrying out spray drying granulation, screening and calcining on dispersed slurry; and carrying out plasma densification treatment, drying and screening on the calcined powder so as to finally obtain the spherical powder with the nanostructured shell cladding nanometer particles. The YPSZ powder for thermal spraying has very low impurity content, and the content of a single impurity is lower than 100 ppm. A compact shell is formed outside the nanometer YPSZ agglomerate particles, thus raising apparent density and fluidity of the agglomerate powder and increasing the melting effect of the powder in plasma.

The invention belongs to the field of manufacturing of ceramsites, and particularly relates to a preparation method of light-weight and high-intensity coal ash ceramsites. Aiming at the problems of low balling rate, low porosity, low intensity and the like during preparation of the ceramsites from coal ash in the prior art, the invention provides the preparation method of the light-weight and high-intensity coal ash ceramsites. The preparation method comprises the following steps: adding a pore forming material, a fluxing agent, a binding agent and an enhancer in coal ash, controlling the particle size and the moisture content of the raw materials, and performing granulation through a disk granulator. By the reasonable cooperation of the pore forming material, the fluxing agent, the binding agent and the enhancer, the prepared coal ash ceramsites are high in porosity and balling rate, and the intensity of the ceramsites is substantially enhanced; the preparation method has obvious economic benefits.

The invention relates to the technical field of resource development, in particular to a comprehensive utilization method of oil field drilling sludge. Sludge which does not contain oil is subjected to electrode separation, aerobic fermentation and granulation to form a product 1 or is subjected to extrusion forming to form a product 2; sludge which contains low content of oil is subjected to oxidation, aerobic fermentation and extrusion forming to form the product 2 or is subjected to granulation to form the product 1; sludge containing high content of oil is added with a moisture modifier, a combustion improver and a bulking and softening agent and is subjected to granulation forming and microwave drying, dried granules are screened, undersize materials are subjected to granulation forming again, and oversize materials form a product 3. Compared with the prior art, oil field drilling sludge, oily sludge and oil sludge and sand with different oil content are treated from the perspective of comprehensive utilization of resources, and the ultimate products can be effectively used as different resources.

The invention relates to a device and a method for gas-solid ejection and granulation of molten blast furnace slags. The device comprises a molten slag lead-in unit, an ejection agent supply unit, a device wall cooling and anti-sticking unit, a rapid cooling discharge unit and a high-temperature-air discharge unit. The method includes: using a mixture of high-pressure gas and solid granules as ejection and granulation agents, performing blowing and granulation for high-temperature molten blast furnace slag liquid flow at a high speed, and breaking the flow into molten slag granules; and then, during flying of the slag granules, rapidly cooling the slag granules by fluidified cooling gas sprayed into the lower portion and anti-sticking cooling gas ejected into via the side wall in an attaching manner so that the slag granules are rapidly solidified to solid granules, and the problem of sticking of the molten slag granules is solved effectively. The method is capable of greatly promoting kinetic energy of the ejection agents to be converted into granule surface energy, ejection agent energy use ratio is increased, the small uniform slag granules are obtained, granulation and rapid cooling are achieved, the slag granules with high vitreous body rate are obtained, and usability of molten blast furnace slag material resources is guaranteed while waste heat in the slags is recovered efficiently.

The present invention discloses peroxide cross-linked polyethylene composition powder and its production process. The peroxide cross-linked polyethylene composition powder consists of: low density polyethylene of density 0.910-0.925 g/cu cm and MI 2-30 g/10min in 70-90 weight portions, linear low density polyethylene graft of density 0.910-0.930 g/cu cm and MI 5-20/10min in 5-16 weight portions, high density polyethylene of density 0.940-0.960 g/cu cm and MI 0.5-10 g/10 min in 1-10 weight portions, antioxidant in 0.1-1 weight portion, and cross-linking agent and assistant in 0.1-3 weight portions. Its production process includes extruding polyethylene composition in a double screw extruder to obtain granular composition, mixing the granular composition with cross-linking agent assistant, milling, and mixing with cross-linking agent. The cross-linked polyethylene composition powder may be cross-linking formed at low temperature.

This invention discloses a method for preparing environmentally friendly composite for controlling nitrogen fertilizer loss. The method comprises: (1) mixing attapulgite, chitosan, polyacrylamide, etc.; (2) irradiating at 500-1300 Gy to form the composite. The composite can be mixed with nitrogen fertilizer and granulated to form controlled-release nitrogen fertilizer granules (with diameters of 1.5-3 mm). The composite can cooperatively adsorb and fix nitrogen and decrease fertilizer requirement, thus can prevent nitrogen entry into water and air and efficiently control water eutrophication and greenhouse gas N2O emission. The composite has such advantages as low cost and high efficiency in fixing nitrogen.

The invention provides a production method for a modified artificial graphite negative electrode material. The method comprises: taking powder obtained by grinding petroleum coke as a main raw material and performing shaping treatment; adding a certain proportion of petroleum asphalt into the shaped petroleum coke material, and performing secondary granulation treatment in an extrusion fusion way; adding the granulated material into a mixture of petroleum asphalt and coal asphalt or coal tar, and performing coating modification treatment; putting the material into a graphitization furnace in bulk to perform high-temperature graphitization treatment, or performing carbonization and graphitization treatment in sequence; performing dispersion and grading treatment after the material is cooled to the room temperature; and finally adding few carbon nanotubes to perform mixing and screening. The method has the advantages that the main raw material is ground petroleum coke powder, and the powder is recycled, so that the cost can be reduced; secondary granulation of small granules can increase the capacity of the material and improve the cycle performance of the material; and due to the adoption of a graphite plate loading mode, the graphitization degree of the material can be increased, namely, the capacity can be increased, and the energy consumption cost can be reduced.

The invention discloses a method for extracting paeonol by use of the CO2 supercritical extraction technology. The method comprises the following steps: washing cortex moutan, drying, grinding, seiving and performing ultrasonic treatment; adding an appropriate amount of beta-cyclodextrin, granulating and drying; uniformly mixing emu oil serving as an entrainer with the raw material powder; feeding the granulated particles into a supercritical extraction kettle for CO2 supercritical extraction; refrigerating the paeonol extract liquid in the supercritical extraction kettle and taking out to obtain an automatic-layering extract, wherein the upper layer is light yellow liquid, and the lower layer is light red brown solid; and separating the liquid to obtain high-purity active monomer paeonol. The method disclosed by the invention has the advantages of simple extraction process, high extraction rate, low extraction temperature, short extraction time and the like; the yield of paeonol can exceed 1.4%; and moreover, CO2 is non-toxic and residue-free, the energy consumption is reduced, cyclic use can be realized, the shortcomings of the traditional extraction method that the paeonol is easily volatilized and the yield is low are overcome, and the application prospect is broad.

The invention discloses a drying flow granulation technology and a device for a paraquat water soluble granule spray. The technology comprises the following steps: raw materials preparation; spray drying granulating; primary dust removing and tower returning for continuous granulation; tower bottom granulating; fluidized bed granulating and drying outside the tower; secondary dust removing and tower returning for continuous granulation; and dust removing for a third time. The device comprises a feeding mechanism, an atomizing mechanism, an air intake mechanism, a drying granulation mechanism, a vibration fluidization dry cooling mechanism, and an exhausting mechanism. According to the technology for the paraquat water soluble granule spray provided by the invention, the granulation yield is improved; the granulation intensity is enhanced; moreover, sealed production is achieved; the dust leakage is avoided; the production security is greatly improved; according to the device, the full automatic, dust-free, clean and continuous production of the paraquat water soluble granule is achieved; moreover, the environmental pollution is reduced; the intoxication of people caused by direct inhaling is prevented; the production security is improved.

The invention discloses a sub-micro grain hard alloy anvil and a preparation method thereof. The sub-micro grain hard alloy anvil comprises the following alloy components: WC (Wolfram Carbide), 10% of Co, 0.4-0.6% of Cr3C2 and 0.2-0.3% of VC (Vitamin C); the particle size of an alloy crystal is 0.8-0.9mum; the porosity of an alloy is A00B00C00; the hardness of the alloy is 90.5-91.5HRA; the coercive force of the alloy is 205-245Oe. The preparation method comprises the steps: with WC powder with the Fisher particle size of 1.0-1.2mum and Co powder with the Fisher particle size of 0.8-1.0mum as raw materials, adding Cr and V additives in the alloy in the preparation process of the WC powder; preparing an alloy mixture by using a rolling wet grinding process, wherein the wet grinding time is 55-60h, and the mass ratio of a ball material is 4:1; drying and granulating the wet ground mixture by using a spray drying granulation method; and sintering a pressed anvil blank at the temperature of 1400-1410 DEG C by using a pressure sintering process, wherein the pressed anvil blank is obtained through cold isostatic compaction; and carrying out copious cooling treatment on the sintered pressed anvil blank by using liquid nitrogen with the temperature of 180 DEG C below zero to 190 DEG C below zero, and then, carrying out subsequent reinforcement treatment on a refined anvil by using a 350-400 DEG C medium-temperature tempering treatment process.

The invention relates to a preparation method of rare earth doped indium gallium zinc oxide powder. The method comprises the following steps of: sequentially adding water, a dispersing agent, galliumoxide powder and rare earth oxide powder into a first mixing barrel to perform pre-dispersion on the added raw materials, and grinding an obtained pre-dispersed solution to obtain first mixed slurry;sequentially adding water, a dispersing agent and zinc oxide powder into a second mixing barrel to perform pre-dispersion on the added raw materials, adding an obtained pre-dispersed solution into thefirst mixed slurry to perform grinding so as to obtain second mixed slurry; sequentially adding water, a dispersing agent and indium oxide powder into a third mixing barrel for pre-dispersing, and adding an obtained pre-dispersed solution into the second mixed slurry so as to perform grinding to obtain third mixed slurry; adding an adhesive into the third mixed slurry, and performing grinding toobtain fourth mixed slurry; and granulating, mixing and screening the fourth mixed slurry to finally obtain the rare earth doped indium gallium zinc oxide powder. According to the preparation method of the invention, the problem of non-uniform components caused by doping of large-particle-size rare earth elements into IGZO powder can be solved.

The invention discloses a method for firing haydite from municipal sludge, loess and bentonite, which comprises the following steps: taking 30-35% by weight of primary sludge, 45-50% by weight of loess and 16-22% by weight of bentonite, rolling, and mixing to homogenize the materials; and aging, granulating, screening, firing to swell the haydite, and cooling in the air. The bulk density of the haydite is 400-500 Kg/m<3>, the compression strength is 1-3.5 Mpa, and the water absorptivity for 1 hour is 8-10%. By directly firing the haydite from the primary sludge, loess and bentonite by using bran coats as fuel, the invention has the advantages of high sludge treatment capacity and low production cost, and can not generate secondary pollution in the production process; the granule size of the product is 1-26mm; and the product satisfies the requirements in Chinese Light-weight Aggregate (Haydite) Standard GB/T17431.1-1998.

The invention discloses a preparation method of a high-strength carbonized artificial aggregate, and the method comprises the following steps: collecting residual concrete, carrying out filter pressing to obtain wet waste residues, crushing, drying and grinding steel slag to obtain steel slag powder, and sufficiently stirring and mixing the wet waste residues and the steel slag powder to obtain amixture; then putting the mixture into a disc granulator for granulation to obtain an artificial coarse aggregate green body; and maintaining the obtained artificial coarse aggregate green body, and carbonizing to obtain the high-strength carbonized artificial aggregate. The high-strength carbonized artificial aggregate prepared by the invention is high in single-particle strength and low in waterabsorption rate; the high-strength aggregate completely meets various performance requirements of a high-strength aggregate, can replace a natural aggregate to be used as a raw material of concrete,greatly reduces the use and exploitation of a natural gravel aggregate, can effectively protect mines and save natural resources, provides a sustainable development production method for the concreteconstruction industry, and has important significance.