300results about "Granulation in rotating dishes/pans" patented technology

The present invention relates to a process for producing a spherical particle comprising an aggregate of particles containing at least 95% of a water-soluble single substance having a viscosity of 10 mPa.s or less as determined in the form of a saturated aqueous solution, the process comprising: preparing moist spherical particles of the single substance by charging, as cores, crystalline particles or granulated particles of the single substance on a rotary disc in a processing vessel of a centrifugal tumbling granulating apparatus, wherein the granulated particles are prepared by granulating a powder of the single substance, and dispersing over the cores a powder of the single substance and simultaneously spraying on the cores a liquid such as water or the like while supplying slit air to provide a fluidized condition; and then fixation treating the moist spherical particles by drying them while spraying an aqueous solution of the single substance or the like on the spherical particles in a fluidized bed apparatus; to the spherical particle produced by the process; and to a pharmaceutical preparation and a food containing the spherical particle.

A method preparing controlled release nitrogen in particulate fertilizers which exhibit single growing season availabilities to plants of about 80 percent or higher. The method utilizes relatively low urea and ammonia to formaldehyde mol ratios of about 1.7 urea to 0.1 ammonia to 1 formaldehyde to assure high conversions to controlled release nitrogen with low free ureas, and carefully controlled elevated temperatures, acid dehydration condensation catalyst concentrations and short dehydration reaction times of about 2-4 minutes to provide effective conversion of hydroxymethyl nitrogen compounds by dehydration condensation reaction to controlled release methylene nitrogen compounds. Quick neutralization of the dehydration catalyst in a turbulent mixing reactor minimizes the formation of undesirable methylene nitrogen polymers which are hot water insoluble and unavailable to plants in a single growing season.

Mechanically strong, water-disintegrable agglomerates made from a particulate calcium source, a water-soluble binder and optionally containing a primary plant nutrient source and/or micronutrient source and a process for forming such agglomerates are disclosed. The agglomerates may be used as a soil liming agent and for introducing nutrient values into cultivated soil. Also disclosed is a method for introducing nutrient values into cultivated soil so as to inhibit leaching of the nutrient values from the soil and improve utilization of the nutrient values by plants grown in the soil.

The invention relates to a method of powder/liquid continuous mixing particle production. Wherein, said method comprises that sealing the top of hopper mixed particle producing room (12); the center at the top uses ejector (14) to continuously eject liquid downwards; the powder outlet (16) at the circumference of ejector disperses the atomized liquid to the powder; and the gas ejector (18) at the circumference of powder outlet feeds gas as the protective air film (Af) that avoiding dispersing the fed powder; therefore, the powder and liquid can continuously contact to form mixed particle (G); and the bottom of room (12) via the rotation of mixing disc (32) can make the air passive pressure, to generate eddy flow, to accelerate the particle (G) generation, and shear or mix the particle (G), to form and discharge uniform particles (G).

A method of forming a depression in a surface of a layer of photo-resist comprises exposing a first portion of a layer of photo-resist with a first dose of radiant energy. A second portion of the layer is exposed with a second dose of radiant energy. The second dose is less than the first dose. The layer is baked.

The invention discloses a disc pelletizing intelligent production system and a control method thereof, and the control system comprises an upper computer control unit, a field control unit, a detection unit, and an electric execution unit. The control system cooperates with the control method, carries out the processing of data and the setting of preset values through the upper computer control unit, and then transmits the data to the field control unit for production control. The detection unit is used for collecting a plurality of practical technological values related with the pelletizing qualified rate in a field disc pelletizing process, and transmitting a detection result to the field control unit for logic criterion in real time. According to the invention, the detection unit serves a data input unit of a production control system, and the electric execution unit serves as a data output unit. The system achieves the adjustment of the production technological parameters of a disc pelletizing device through a programmable logic controller, achieves a purpose of controlling the pelletizing qualified rate in a preset qualified range, and improves the product quality.

The invention discloses an extrusion cutting type multi-particle size adjustable granulating machine. The extrusion cutting type multi-particle size adjustable granulating machine comprises a stirring cylinder, wherein the stirring cylinder is arranged on a base, a spiral propeller is arranged in the stirring cylinder, and a material inlet hopper is arranged at the upper end of the stirring cylinder; the spiral propeller is connected with a propelling motor; a granulating disc is arranged at the front end of the stirring cylinder; conical granulating sleeves are uniformly arranged on the granulating disc, and are sheathed on an adjusting disc; a cutting tool disc is arranged at the front end of each conical granulating sleeve, and is fixedly arranged on a fixed disc; the fixed disc is connected with a cutting motor, and the cutting motor is arranged on a slide base; the slide base is connected with a screw rod in a bracket, and the bracket is connected with the base; an adjusting rotary button is arranged at the front end of the screw rod; each conical granulating sleeve is in a conical sleeve shape, and adjusting grooves are uniformly arranged at the front end of each conical granulating sleeve; mounting grooves are arranged on the inner walls of both sides of each adjusting groove; an arc-shaped movable plate is arranged in each mounting groove; outlet tool blades are uniformly arranged on the inner wall of the front end of each conical granulating sleeve. The extrusion cutting type multi-particle size adjustable granulating machine has the advantages that the quick and high-efficiency granulating function is realized, the granulating size can be adjusted, the adjusting range is wide, and the flexibility and convenience in use are realized.

A coater for coating a material with a solution or a suspension includes an access door and a process port separately openable within a housing. A rotating coating drum is removably connected with respect to the coater and the coater is configured for exchange of drums having a wide range of production capacities.

The invention discloses a method for controlling the particle size distribution and content of an ABC powder extinguishing agent, which comprises the following steps of: (1) firstly, crushing diammonium phosphate with an LF concealed and stepped super micro mill and controlling the 'particle size distribution' of the diammonium phosphate; secondly, controlling the 'particle size distribution' of other materials in 0.125 millimeter, 0.063 millimeter and 0.040 millimeter sieves and an underpan; and finally, controlling the 'particle size distribution' and 'content' of the product. The ABC powder extinguishing agent prepared by the method can effectively extinguish class A, B and C fires and electric equipment fires, has a class A, B, C fire extinguishing efficiency which is 1 to 3 times of that of the prior ABC powder extinguishing agent, saves raw material cost, improves extinguishing efficiency and can match products made in advanced countries across the world in performance.

A spray gun (31) is attached to a multi-function unit (32) movable in a horizontal direction and a perpendicular direction. The spray gun (31) is mounted to a support holder (33), and the support holder (33) is connected to a support arm (35) of the multi-function unit (32). The support arm (35) is attached to a unit cover (36) which is openable/closable with respect to a casing (2). The support holder (33) and the support arm (35) can hide and house a liquid hose and an air hose therein so that the hoses and the like are arranged in an apparatus in such a state as to be completely free from being exposed. An installation position of the spray gun (31) can be finely adjusted by the multi-function unit (32) during a coating process, thereby enabling a control for keeping constant distances between tablet surfaces and the spray gun (31).

The invention discloses a disk granulator, comprising a main rack, a power rack arranged above the main rack, a drive device fixedly arranged on the power rack, a granulating disk connected with an output shaft of the drive device and arranged vertical to the power rack, and a cleaning device arranged above an opening of the granulating disk. The cleaning device is fixedly connected to the power rack through an inclined beam; one end of the power rack is hinged with the main rack; the other end of the power rack is penetrated with an adjusting screw for adjusting the inclined direction of the power rack; and one end of the adjusting screw is provided with a spherical connector which is clamped in a spherical hole on the main rack. The disk granulator can be used for adjusting the inclined angle of the granulating disk so as to adapt to granulating production of materials with different ingredients, and has high granulating quality; and product quality and production efficiency of the disk granulator are improved, and diversified granulating production requirements can be met.

Provided is a coating apparatus, which has satisfactory operability at a time of installing or exchanging a spray nozzle, is not complicated in structure, and is advantageous in terms of layout. A rotary drum (2) is rotated around an axis (A) inclined with respect to a horizontal line, and has an opening (5) at one end on an inclination upper side. A spray nozzle unit (10) is removably attached to a swing arm (34), and the swing arm (34) can swing with respect to a swing axis (34c). Owing to the swing operation of the swing arm (34), the swing nozzle unit (10) can be moved between the inside and the outside of the rotary drum (2).

Provided is a method for manufacturing metal microparticles in which the ratio of crystallite diameter to the particle diameter of the metal microparticles is controlled. At least two types of process fluid are used, including a metal fluid in which a metal or a metal compound is dissolved in a solvent, and a reducing agent fluid which includes a reducing agent. Sulfate ions are included in one or both of the metal fluid and the reducing agent fluid. The process fluid is mixed in a fluid thin film formed between at least two processing surfaces, at least one of which rotates relative to the other, and which are disposed facing each other and capable of approaching and separating from each other, and metal microparticles are precipitated. The present invention is characterized in that at this time, the ratio (d/D) of the crystallite diameter (d) of the metal microparticles to the particle diameter (D) of the metal microparticles is controlled by controlling the mole ratio of metal and sulfate ions in the mixed process fluid.

A method of making spherical bodies from powder, which comprises (1) preparing an adjusted powder so as to have at least one powder characteristic selected from the group consisting of an average particle size, a powder particle size distribution and a BET specific surface area, (2) preparing nuclei having a particle size larger than that of the adjusted powder, (3) rotating the nuclei, and (4) adding the adjusted powder and a solvent to the rotating nuclei so that particles of the adjusted powder accumulate on the nuclei to form granular bodies. Also disclosed is a spherical body having a core or nucleus formed in the spherical body, an adjusted powder composition for forming a spherical body, and a method for manufacturing spherical sintered bodies of silicon nitride.

The invention provides a disk pelletizer. The disk pelletizer comprises a driving device, a bracket, a main shaft, a rotary disk, a rotary oil distributor, discharge doors and a hydraulic system, and is characterized in that the driving device provides power for the rotary disk through the main shaft; the axle of the main shaft is coincided with the central line of the rotary disk, and forms a certain angle with the horizontal direction; the upper extending end of the main shaft is fixedly connected with the bottom surface of the rotary disk, and passes through the bottom surface of the rotary disk; the rotary oil distributor is arranged at the upper tail end of the main shaft; a plurality of discharge doors driven by a hydraulic cylinder are arranged at the lowest position of the side surface of the rotary disk; and the hydraulic system consists of an inner hydraulic system and an outer hydraulic system which are connected with oil passages through the rotary oil distributor. Compared with the prior art, the disk pelletizer has the advantages that hydraulic automatic switch discharge doors are arranged on the side wall of the rotary disk; and through the installation and arrangement design of the rotary oil passages, the problem of an existing disk pelletizer such as low discharge efficiency caused by necessary shutdown during discharging is effectively solved.

The invention relates to spherical granules having a uniform grain size and a uniform density which are suitable for a controlled-release preparation, a process for producing the same, and a spherical granule preparation using the same. Specifically, the invention relates to a process for producing spherical granules comprising the steps of: wetting powder materials comprising one or more kinds of pharmaceutical substances and have a mean particle size of from 1 to 100 .mu.m; charging the wet powder materials into a centrifugal fluidized granulating apparatus; spraying a liquid to the wet powder materials at a rate of less than 3% based on the plastic limit of the powder materials per min. while rotating the rotary disk of the centrifugal fluidized granulating apparatus until the liquid content of the powder materials reaches 75 to 120% based on the plastic limit of the powder materials, and drying the sprayed product to give spherical granules; spherical granules having a mean grain size of 100-1000 .mu.m, in which at least 90% by weight of the total amount of the spherical granules has such a grain size distribution that the maximum grain size is not larger than 1.2 times the minimum grain size, and the difference in density between the individual spherical granules is less than 0.05 g/cm.sup.3 ; and a spherical granule preparation comprising the spherical granules.

In order to manufacture the compound powder or the porous granulated substance in an efficient manner, a powder processing apparatus has an accumulating face on which the processing target powder is to be accumulated and a processing face disposed in opposition to the accumulating face and convexly curved, and a moving means for moving the accumulating face and the processing face along the accumulating face relative to each other. The apparatus comprises an excitement treatment means capable of applying an excitation energy to the processing target powder accumulated on the accumulating face from an excitation energy supplying portion disposed in opposition to the accumulating face or an oscillation means for oscillating the accumulating face or the processing face in a direction intersecting the accumulating face.

The invention discloses an innocent treatment system for household garbage incineration fly ash at least comprising a fly ash pretreatment subsystem, a pelleting subsystem, a plasma melting treatmentsubsystem, and an exhaust gas treatment subsystem; the fly ash pretreatment subsystem is used for multi-stage washing fly ash produced by household garbage incineration, and fly ash residues are obtained; the pelleting subsystem is used for mixing the fly ash residues with formula additive materials, and pelleting treatment is carried out to form fly ash particles; the plasma melting treatment subsystem is used for performing plasma melting treatment for the fly ash particles from the pelleting subsystem, and glass crystals are formed and cooled; and the exhaust gas treatment subsystem is usedfor performing innocent treatment for exhaust gas produced by the plasma melting treatment subsystem. The invention also discloses a corresponding method. The implementation of the innocent treatmentsystem and the method for household garbage incineration fly ash can realize disposal of harness, stabilization and recycling of the incineration fly ash.

A mixing apparatus is provided that evenly mixes a powder raw material and a liquid raw material. The powder raw material is supplied to and spread out on a rotating disk to form a thin layer of dispersed particle swarms close to the periphery of the rotating disk. A rotary atomizer that synchronously rotates on the same axis is provided above the rotating disk. The liquid raw material is supplied to an inside surface of the rotary atomizer. Then, the liquid raw material is conducted to an atomizing head where the liquid raw material is atomized, and droplet swarms are horizontally radiated. The dispersed particle swarms and the droplet swarms are merged and condensed within a tapered wedge-shaped space, with the result that these swarms change into a fine and homogeneous mixture. The mixture is then radiated from the periphery.

The invention discloses an extrusion-spheronization integrated granulating machine. A support cutter mechanism is arranged between a screw extruder and a spheronizator of the granulating machine; the support cutter mechanism at least comprises a filament propping rod, a filament and a base support; filament winding slots are formed at two ends of each filament propping rod, the filament is fixed on the filament propping rod by the filament winding slot, two ends of each filament propping rod are in clearance fitting with grooves of a pore plate by pins, a spheronization disc cover is arranged above a spheronization disc and is in clearance fitting with the spheronization disc; a spheronization feeding hole, a lifting lug and a single-screw guide groove are respectively formed in and arranged on the spheronization disc cover; the spheronization disc cover is fixed on a spheronization barrel by the lifting lug; the spheronization feeding hole and the single-screw guide groove are arranged on the outer surface and the inner surface of the spheronization disc cover respectively, the spheronization feeding hole is communicated with a through hole, the inlet and the outlet of the single-screw guide groove are communicated with the through hole and a discharge hole respectively, friction lines are formed on the upper end surface of the spheronization disc, and the base support is arranged on the spheronization disc. The extrusion-spheronization integrated granulating machine is small in occupied area, high in granulating efficiency, short in time and good in granulating effect.

A spherical tungsten carbide powder is characterized by that the material has a microhardness higher than 3600 kgf/mm2, and that the powder has an apparent density from 9.80 to 11.56 g/cm3. A method for the manufacture of a powder comprises the steps: a) providing a chamber comprising a rotatable crucible, b) adding material into said rotatable crucible, c) melting the material using a plasma arc discharge, d) rotating the crucible to atomize the molten material to form liquid droplets, with subsequent cooling of the droplets to obtain a powder, wherein the material added into said rotatable crucible is heated to a temperature above 40% of the melting temperature of the material before it enters the crucible. It is possible to reduce the current required for melting the stock. Heat losses are decreased, and the spherical powder obtained during atomization becomes more homogeneous in its composition and structure. The cost is reduced.

The invention discloses a method for inhibiting the generation of large pellets and suitable for being used in a disk pelletizer. The unqualified large pellets are crushed by equipment for inhibiting the generation of the large pellets and arranged adjacent to a pelletizer disk by adjusting the position of an inhibiting rod device of the equipment for inhibiting the generation of the large pellets according to the actual positions of the unqualified large pellets generated in the pelletizer disk, blocking the inhibiting rod device on the lower half part of the pelletizer disk and the positions opposite to those of the unqualified large pellets and driving the unqualified large pellets to impact onto the inhibiting rod device through the rotary pelletizer disk. According to the method, the unqualified large pellets are crushed according to the actual positions of the unqualified large pellets generated in the pelletizer disk. The method is high in crushing efficiency and safety and strong in practicability.

A closed type disk grain making machine comprises a disk, a disk cover, lifting boards, a feed inlet, a hot air inlet, an air outlet, a motor, a speed reducer, a rotary shaft, a support and a bracket, wherein the lifting boards are evenly distributed on the inner wall of the disk, the feed inlet and the air outlet are arranged in the upper end of the disk cover, the hot air inlet is formed in the lower end of the disk cover, the support is hinged to the bracket, the speed reducer is connected with the motor, the motor is fixed to the bracket, and the portion, at the bottom of the disk, of the rotary shaft is in transmission connection with the speed reducer. By means of the closed type disk grain making machine, grains are primarily dried while being made, workloads of the later drying link are reduced, and production efficiency is improved. Meanwhile, by means of the lifting boards, corrosion and abrasion to the disk from the grains are reduced, and the service life of the closed type disk grain making machine is prolonged.