Topic
Jet mill
About: Jet mill is a research topic. Over the lifetime, 803 publications have been published within this topic receiving 5686 citations.
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Patent•
22 Jan 1986
TL;DR: In this article, an impurity-free fine polymer powder is obtained by drying a polymer particle emulsion obtained by emulsion-polymerizing a monomer with the aid of a water-soluble polymer as an emulsion stabilizer, disintegrating the dried particles and classifying them.
Abstract: PURPOSE:To obtain an impurity-free fine polymer powder, by drying a polymer particle emulsion obtained by emulsion-polymerizing a monomer with the aid of a water-soluble polymer as an emulsion stabilizer, disintegrating the dried particles and classifying them. CONSTITUTION:A least one monomer selected from among methyl methacrylate, styrene and acrylonitrile is emulsion-copolymerized in the presence or absence of other monomers emulsion-copolymerizable therewith in an aqueous medium (containing no synthetic surfactant-type emulsifier) in which about 0.01-5wt% water- soluble polymer (e.g., polyvinyl alcohol or gelatin) is dissolved as a protective colloid. The polymer particles are recovered from the formed polymer particle emulsion, dried, disintegrated by means of a jet mill which can disintegrate said particles into primary particles, and classified to obtain a fine powder of a good purity.
2 citations
Patent•
29 Jul 2015
TL;DR: In this article, an oblique-crossing back mixing type jet mill drill bit of a horizontal well is characterized in that a chip removal groove in the gauge protection part of the PDC drill bit is removed, and a turbulence negative pressure sand suction device and an OCCM type jet crushing device are additionally arranged in the drill bit, so as to reduce the pressure difference of the well bottom, realize the underbalance and improve the drilling speed of the machine.
Abstract: The invention discloses an oblique-crossing back mixing type jet mill drill bit of a horizontal well. The oblique-crossing back mixing type jet mill drill bit mainly comprises a PDC (polycrystalline diamond compact) drill bit, and is characterized in that a chip removal groove in the gauge protection part of the PDC drill bit is removed, and a turbulence negative pressure sand suction device and an oblique-crossing back mixing type jet crushing device are additionally arranged in the PDC drill bit; the turbulence negative pressure sand suction device is used for sucking the fluid at the well bottom according to the principle of a sand suction pump, so as to reduce the pressure difference of the well bottom, realize the underbalance, and improve the drilling speed of the machine; the oblique-crossing back mixing type jet crushing device is used for effectively crushing the rock cuttings according to the principle of an oblique-crossing back mixing type jet mill, so as to improve the cutting carrying efficiency, fundamentally eliminate a cutting bed in the horizontal well, and finally realize the safety and high-efficiency drilling of the horizontal well.
2 citations
Patent•
16 Jul 2004
TL;DR: In this article, the authors proposed a powder processing method to prevent powder from being adhered to the wall surface of the processing device when the powder is pneumatically transferred, where the powder was made to pneumatically transfer in the powder processing device.
Abstract: PROBLEM TO BE SOLVED: To provide a powder processing method and a powder processing device capable of preventing powder from being adhered to the wall surface of the processing device when the powder is pneumatically transferred. SOLUTION: In the powder processing method and processing device and the powder manufacturing method, the powder such as medicine is pneumatically transferred. The powder processing device 1 such as a jet mill has a heating means 13 positioned along a wall surface 12 against which the powder collides. By the heating means 13, the wall surface 12 is heated to a temperature higher than the vicinity of the softening start temperature of the powder and lower than the melting temperature of the powder. Then the powder is made to pneumatically transfer in the powder processing device 1. COPYRIGHT: (C)2005,JPO&NCIPI
2 citations
01 Jan 2019
2 citations
TL;DR: In this paper, the batch grinding kinetics of silicon carbide (SiC) particles in a fluidized bed opposed jet mill were investigated by population balance modeling and the selection and breakage functions were obtained by the first Kapur function method.
Abstract: This study investigated the batch grinding kinetics of silicon carbide (SiC) particles in a fluidized bed opposed jet mill by population balance modeling. The selection and breakage functions were obtained by the first Kapur function method. The breakage behaviors for various SiC particles obtained under different experimental conditions (such as inlet air pressure, feed load, and distance between nozzle outlet and jet meeting point) in the jet mill were discussed. In addition, a polynomial model was proposed to predict the relation between the Kapur function and the particle size in the jet mill. The product size distributions obtained under various operating conditions from the jet mill could be simulated by modeling.
2 citations