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•
28 Feb 1991
TL;DR: In this paper, a sintered body having uniform structure was manufactured by beforehand crushing metal particles before kneading at the time of manufacturing the Sintered Body by kneaded the metal particles and binder of thermoplastic resin, etc., to make pellet.
Abstract: PURPOSE:To manufacture a sintered body having uniform structure by beforehand crushing metal particles before kneading at the time of manufacturing the sintered body by kneading the metal particles and binder of thermoplastic resin, etc., to make pellet. CONSTITUTION:One or more kinds of the metal particles and the binder composed of thermoplastic resin, wax, etc., are kneaded to form the pellet and the injection-molding is executed to this pellet to form the green body having the prescribed shape. By heating this green body, the binder is vaporized to make degreased body and the sintering is executed to manufacture the sintered body of the granular material. Then, before kneading, the metal particles forming secondary particles by coagulation are beforehand crushed with jet mill pulverizer, etc., and returned back to the primary particle shape. By this method, the sintered body having the uniform structure nd sufficient strength is obtd.
1 citations
Patent•
19 Feb 2004
TL;DR: In this paper, an idactus spike nozzle device is set on the side of a fluidized bed jet mill to improve the efficiency of a mill and to reduce costs by nozzle design, and particles 13e are introduced from a secondary supply pipe 340 into the second hollow part 310.
Abstract: PROBLEM TO BE SOLVED: To improve the efficiency of a mill and to reduce costs by nozzle design. SOLUTION: An idactus spike nozzle device is set on the side of a fluidized bed jet mill. In the nozzle device, the second cylinder part 302 by the second wall 304 is installed in the first cylinder part by the first wall 204. The first hollow part 210 held between the first cylinder part and the second cylinder part 302 is made an annular channel for the first fluid stream 215, and the second hollow part 310 in the second cylinder part 302 is made a channel for the second fluid stream 217. Particles 13e are introduced from a secondary supply pipe 340 into the second hollow part 310. A cowl lip 206, a spike part 312, etc., are installed at a nozzle release end. An aero-spike 224 is produced as an internal throat. A high-speed synthetic stream 220 flows to be collected in a nozzle shaft 311 to expand the width of a jet. The acceptance of particles by the synthetic stream 220 and the probability of conveyance are increased. COPYRIGHT: (C)2004,JPO
1 citations
Patent•
27 Jul 2016
TL;DR: In this article, a preparation method of a positive electrode material for a lithium-ion battery with a high discharge voltage platform is presented, which comprises the following steps: mixing selected generic partial nanometer cobalt source and large-particle cobaltosic oxide source as a source material and sintering a largeparticle positive electrodes material under the condition of excessive lithium ratio; and carrying out left-skewed crushing treatment on the prepared positive electrode materials by a jet mill through relatively strong jet milling and then carrying out secondary roasting, crushing and screening treatment to
Abstract: The invention discloses a preparation method of a positive electrode material for a lithium-ion battery with a high discharge voltage platform. The method comprises the following steps: mixing selected generic partial nanometer cobalt source and large-particle cobaltosic oxide source as a cobalt source material and sintering a large-particle positive electrode material under the condition of excessive lithium ratio; and carrying out left-skewed crushing treatment on the prepared positive electrode material by a jet mill through relatively strong jet milling and then carrying out secondary roasting, crushing and screening treatment to obtain the positive electrode material for the lithium-ion battery. According to the positive electrode material for the lithium-ion battery, the central particle size is 12-18 microns; the particle size distribution is left-skewed distribution; the powder compaction density is greater than 2.7g/cm ; the prepared total battery is good in processability; the compaction density of a pole piece can reach 4.1g/cm ; through a 3.0-4.2V total battery performance test, the 1C discharge capacity per gram is 146mAh/g; and the 1C discharge 3.6V platform ratio can reach 80%-90%
1 citations
Patent•
24 Apr 1998
TL;DR: In this paper, the authors proposed a method to relax the shock acting on magnetic powder at the time of collision by adding and mixing a lubricant to a magnetic material and then pulverizing the mixture.
Abstract: PROBLEM TO BE SOLVED: To relax the shock acting on magnetic powder at the time of collision of the powder and restrain the stress acting on a crystal structure at the time of pulverization, by adding and mixing a lubricant to a magnetic material and then pulverizing the mixture. SOLUTION: Magnetic powder of a magnetic material expressed by a formula RaFe(100-a-b-c)MbNc is prepared (with R contains at least one type of rare earth element including Y and Sm as an essential element at approximately 50at% or more, and M is at least one of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W, while a, b and c represent atomic percentages having the relations of 5<=a<=20, 0<=b<=5 and 3<=c<=30, with the remaining portion being Fe). Then, fatty acid as a lubricant is added to and mixed with the magnetic powder. The mixture is then pulverized by using a jet mill, more preferably, an airstream jet mill. Thus, the fatty acid film is caused to exist between colliding substances at the time of collision, thereby providing good lubricity. Thus, the shock acting on the magnetic powder at the time of collision is relaxed, thereby reducing the quantity of defects introduced by pulverization and exhibiting excellent magnetic property.
1 citations
Patent•
26 Nov 2019
TL;DR: In this paper, a carbon dioxide in air in the jet mill is absorbed by a small amount of lithium hydroxide through air self-circulation to obtain air without carbon elements, and therefore products with many impurities are prevented from being obtained.
Abstract: The utility model discloses a carbonation-free compressed air closed-loop airflow crushing battery-grade lithium hydroxide system The device comprises an air compressor, an air storage tank, a freezedryer, a jet mill and a dust collector which are connected in sequence, every two adjacent devices are connected through an air pipeline, an air outlet of the dust collector is connected with an induced draft fan, and the induced draft fan is circulated to an air inlet of the air compressor again through an air balance tank by adopting the air pipeline The utility model further discloses a production process of the carbonation-free compressed air closed-loop airflow crushing battery-grade lithium hydroxide system By the adoption of the design, waste gas emission is not needed, carbon dioxide in air in the jet mill is absorbed by a small amount of lithium hydroxide through air self-circulation to obtain air without carbon elements, and therefore products with many impurities are prevented from being obtained, energy is saved, environment is protected, and the jet mill is rich in practicability
1 citations