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4194 results about "Grinding mill" patented technology

Small-scale mill and method thereof

A small-scale or micro media-mill and a method of milling materials or products, especially pharmaceutical products, use a dispersion containing attrition milling media and the product to be milled. The milling media can be polymeric, formed of polystyrene or cross-linked polystyrene, having a nominal diameter of no greater than 500 microns. Other sizes include 200 microns and 50 microns and a mixture of these sizes. The mill has a relatively small vessel having an opening, an agitator, a coupling and a motor. The agitator can have a rotor and a shaft extending therefrom. The rotor can be cylindrical or have other configurations, and can have tapered end surfaces. The coupling can close the vessel opening, or attaching the coupling to the motor can close the opening. The coupling has an opening through which the rotor shaft extends into the motor. A sealing mechanism, such as a mechanical or lip seals the shaft while permitting the rotor shaft to rotate. The vessel can contain one or more ports for circulating the dispersion, where milling can be made in batches or recirculated through the milling chamber. The media can be retained in the vessel or recirculated along with the process fluid. The rotor is dimensioned so that its outer periphery is spaced with a small gap from an inner surface of the vessel. The vessel also can have a way of cooling the dispersion.
Owner:ALKERMES PHARMA IRELAND LTD

Method for producing spherical thermal-spraying powder

The invention discloses a method for producing spherical thermal-spraying powder. The method sequentially comprises the steps of: A, firstly, adding 55-95% of tungsten carbide powder, 5-33% of metal nickel powder or cobalt powder or iron powder, and 0-22% of chromium carbide powder into a ball grinding mill in terms of mass percentage, meanwhile, adding 15-35% of wet-grinding media and 2-5% of a forming agent in terms of the total mass of raw material powder, and performing wet grinding for 12-40h to obtain mixed slurry; B, centrifuging, atomizing and pelleting to obtain spherical mixed powder; C, placing the spherical mixed powder into a dewaxing and sintering integrated furnace, removing the forming agent, sintering for 20-70min in vacuum at the temperature of 800-1350 DEG C, cooling to below 50 DEG C and discharging out of the furnace; and D, crushing and sieving agglomerate materials obtained in the step C to obtain the spherical thermal-spraying powder. The method disclosed by the invention has wide applicability, and is not only suitable for producing the tungsten-carbide-based spherical thermal-spraying powder but also suitable for producing the thermal-spraying powder of other metal, nonmetal and mixtures of metal and nonmetal; and a production process is nonhazardous, the quality is stable and consistent, and the thermal-spraying powder smaller than 30 micrometers can be produced.
Owner:ZHUZHOU HARD ALLOY GRP CO LTD

Testing method for content of coal seam methane sampled under negative-pressure environment

The invention provides a testing method for the content of a coal seam methane sampled under a negative-pressure environment. The testing method comprises the following steps: sampling, namely carrying out in-situ measurement on the methane desorption amount; recording the final in-situ desorption amount V2; determining a methane desorption principle of a coal sample under the negative-pressure environment; carrying out lost methane amount calculation, namely calculating the loss amount V1 according to the measured methane desorption principle of the coal sample under the negative-pressure environment; carrying out residual methane amount laboratory determination, namely heating the coal sample in a sealed state and degassing in vacuum; testing the first-time degassing amount V3; crushing the coal sample by a ball grinding mill and degassing to determine the second-time degassing amount V4; carrying out gas component analysis in the degassing process; and determining the content X of the coal seam methane according to the V1, the V2, the V3 and the V4, and the weight m of the coal sample. The testing method for the content of the coal seam methane sampled under the negative-pressure environment is simple and feasible and particularly has important theoretical values and actual meanings on the desorption amount and the desorption principle of methane under the negative-pressure environment when negative-pressure pumping-out type spot sampling is carried out; the accuracy and the reliability of testing data can be greatly improved and theoretical data are provided for the coal mine safety production.
Owner:HENAN POLYTECHNIC UNIV

Antibacterial anti-alga color master batch dedicated to fishing net and preparation method thereof

ActiveCN102924804AHas antibacterial and anti-algae functionsEasy to useFisheryMixed materials
The invention discloses an antibacterial anti-alga color master batch dedicated to a fishing net and a preparation method thereof. The color master batch disclosed by the invention comprises the following raw materials in weight part: 35-75 parts of carrier resin, 10-48 parts of pigment, 10-20 parts of antibacterial agent, and 0.5-3 parts of compatilizer. The preparation method for the color master batch, disclosed by the invention, is realized through the following steps: adding the pigment, the antibacterial agent and a processing agent into a grinding miller as per the raw material ratio for grinding and refining, adding the carrier resin and the compatilizer together into a high-speed mixer for uniform mixing, and finally adding the mixed material into a double-screw extruder for mixing and extruding. According to the invention, the antibacterial agent is added into the color master batch dedicated to the fishing net, and the compatilizer is added to enhance the compatibility of the prescription components, so that the antibacterial anti-alga color master batch dedicated to the fishing net can be prepared; and moreover, the color master batch has antibacterial and anti-alga functions, is convenient to add and use, and has the advantages of low toxicity, high efficiency and long antifouling period.
Owner:CHONGQING AOCAI NEW MATERIAL CORP LTD

Production technology of high-grade molybdenum concentrate

The invention discloses a production technology of high-grade molybdenum concentrate, which comprises the following steps: rough molybdenum concentrate is obtained by roughing crude molybdenum ore, the rough molybdenum concentrate is concentrated and removed reagent through a thickener, underflow enters a hydraulic swirler to be graded previously, overflow after the grading enters a primary flotation column to be selected, the underflow after the grading enters a horizontal ball grinding mill to be reground, and after the regrinding, the ore discharge enters the hydraulic swirler to be regraded; selected concentrate from the primary flotation column is cleaned by a vertical ore mill to enter a secondary and a tertiary flotation columns to be selected, and the selected concentrate from thetertiary flotation column directly enters or enters a quartic or a quintic flotation columns to be selected after being cleaned by a second section of the vertical ore mill to obtain the high-grade molybdenum concentrate; the selected tailings from the primary flotation column is tertiary scavenged by a flotation machine, and the scavenged concentrate tailings from the tertiary scavenging enters the next procedure. The technology adopts the flotation columns and the flotation machine, so the flow is short, the agent system is simple, the adaptability of the crude ore is strong, and the molybdenum concentration ratio is high, the molybdenum concentrate has high grade, large yield and high recycling rate so as to provide excellent raw material to the following molybdenum chemical engineering and further processing.
Owner:JINDUICHENG MOLYBDENUM CO LTD

Collision grinding type ultrafine smashing device

The invention discloses a collision grinding type ultrafine smashing device. The device mainly comprises a feeding device, a collision device, a grinding device and a discharging device, wherein a feeding barrel body in the feeding device is matched with a material collecting disc; the material collecting disc is mounted on a main shaft through a key; discharge holes are formed in the edge of the material collecting disc; the main shaft rotates to drive the material collecting disc to rotate; material leakage pipes in the collision device are in threaded connection with the discharge holes of the material collecting disc; when materials are accelerated, the materials are thrown through a pipeline under the action of centrifugal force at a high speed to collide with collision pieces to be crushed; the grinding device comprises three levels of grinding mechanisms; the materials are sequentially fed into the first-level, the second-level and the third-level grinding mechanisms under the action of gravity; and grinding mechanisms comprise grinding discs and grinding blocks. According to the collision grinding type ultrafine smashing device, materials of which the particle size difference is relatively large can be smashed at a time, the condition that a pulverizer needs a sieving net is improved, the smashing efficiency and the smashing effect are improved, and the production efficiency for producing ultrafine powder can be improved.
Owner:TAIYUAN UNIV OF TECH

Control method of large-sized mining grinding mill end flange welding deformation

The invention provides a method for controlling welding deformation of an end flange of a large-sized mine mill, which comprises two contents: 1. the groove butt joint mode and welding mode before the end flange(2) and a barrel body(1) are welded are improved, the groove butt joint mode has three types which are small inner part and big outer part type, equal inner part and outer part type and big inner part and small outer part type respectively, and the welding mode correspondingly has three types; and 2. the correction is performed after welding, which has obvious effect, and the product quality is effectively ensured. By utilizing one welding stress to overcome the other welding stress, the welding stresses inside and outside the connecting part between the barrel body and the flange are balanced (i.e. the transverse shrinkages of the welding seams are the same); in the end, when the barrel body of the mill is subjected to relief annealing, the welding stresses inside and outside the barrel body of the mill are equally released, so that the method has the advantages of having little welding deformation, reducing the work load of correction after welding, improving the production efficiency, shortening the production cycle and lowering the production cost.
Owner:CITIC HEAVY INDUSTRIES CO LTD

Chinese herbal medicine smashing and grinding machine

The invention discloses a traditional Chinese medicine crushing and grinding machine, which comprises a base, a supporting foot, a grinding tank, a tank cover, a movable buckle, a crushing blade and a hammer; the top of the tank cover is fixedly connected with a casing, and the top of the casing is fixedly connected with a The top plate, the bottom of the top plate is provided with a crankshaft, the outer wall of the casing is fixedly connected with a second motor, the crankshaft is rotatably connected with a connecting rod, the bottom of the crankshaft is provided with a sliding plate, and the lower surface of the sliding plate is fixedly connected with the first motor, the first The shaft extension end of the motor is fixedly connected with a rotating shaft, the side wall of the rotating shaft is fixedly connected with a crushing blade, and the end of the rotating shaft is fixedly connected with a hammer, the crushing blade and the crushing blade are used to crush the Chinese medicinal materials, and the crushing blades are used to stir the Chinese medicinal materials; To a certain extent, the Chinese herbal medicine particles pass through the sieve hole and reach the bottom of the grinding tank, and the hammer head beats the Chinese herbal medicine up and down in the grinding tank while rotating, and crushes and grinds the Chinese herbal medicine; the invention can crush and grind the Chinese herbal medicine at the same time .
Owner:合肥红蔻健康管理有限公司

Steel slag ultra-sulphate cement and preparation method thereof

The invention relates to steel slag super-sulphate cement, which comprises the following components in weight percentage: 20 to 80 percent of steel slag, 5 to 65 percent of slag and/or fly ash, 5 to 25 percent of sulfate activator, 1 to 10 percent of cement clinker or calcium hydroxide, and 0.05 to 3 percent of alkaline activator. A method for preparing the steel slag super-sulphate cement comprises the following steps: grinding the steel slag, the slag and/or the fly ash, and further grinding the cement clinker, the sulfate activator and/or the alkaline activator separately; and adopting a mixed grinding method or a mixed material method to prepare the cement after the measurement according to a formulation, wherein when the mixed grinding method is adopted, each raw material is added into a cement grinding mill until the grinding is even after the measurement according to the formulation; and when the mixed material method is adopted, each raw material is added into a compulsory mixer after the measurement according to the formulation until the mixture is mixed sufficiently; or each raw material is directly added into the cement grinding mill to perform grinding after the measurement according to the formulation. The method can change wastes of the steel slag, the slag, and the fly ash which are difficult to be used into valuable, thereby contributing to preventing environment, saving piling ground, and reducing cost with simple and practical preparation process.
Owner:WUHAN UNIV OF TECH

Dyeing process of pure cotton fabric

The invention discloses a dyeing process of a pure cotton fabric, which comprises the following steps: a. taking one mass part of pure cotton fabric to be dyed; b. grinding a powdery reactive dye occupying 2-8% of the total mass of the fabric in a ball grinding mill for 2h, adding ethanol and grinding for 1h, wherein the mass of ethanol is nine times of that of the powdery reactive dye; c. adding decamethylcyclopentasiloxane, high-speed cutting for 5min at a rotating speed of 600r/min, and preparing a powdery reactive dye/decamethylcyclopentasiloxane suspension system, wherein the mass of the decamethylcyclopentasiloxane is 50 times of the total mass of the fabric; d. pretreating the pure cotton fabric to be dyed in an alkali solution of 1-130g/L so as to enable the pure cotton fabric tofully swell, and controlling the fabric liquid carrying rate to be 100-220% through a rolling machine; and e. immersing the treated fabric into the powdery reactive dye/decamethylcyclopentasiloxane suspension system, dyeing for 40min at normal temperature, slowly rising the temperature to 70-110 DEG C within 15min, fixing color for 10-60 min at the temperature of 70-110 DEG C, and finally reducing the temperature to the normal temperature to finish dyeing. The dyeing process disclosed by the invention has the advantages of high dyeing fixation rate, environmental-protection and no pollution.
Owner:HAINING GREEN UNIVERSE TEXTILE TECH CO LTD
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