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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 Oct 2019
TL;DR: In this article, a preparation method of special alumina for high-purity lithium battery separation membranes is presented, which comprises: preparing boehmite by using aluminum hydroxide as a raw material, using ultrafine aluminum hydoxide as a seed crystal, using ammonia water as an additive and using soft water as a reaction medium through a hydrothermal reaction.
Abstract: The invention discloses a preparation method of special alumina for high-purity lithium battery separation membranes. The preparation method comprises: preparing boehmite by using aluminum hydroxide as a raw material, using ultrafine aluminum hydroxide as a seed crystal, using ammonia water as an additive and using soft water as a reaction medium through a hydrothermal reaction; carrying out hightemperature calcination on the boehmite to obtain alpha-Al2O3 raw powder; and grinding the alpha-Al2O3 raw powder by a horizontal sander, and carrying out spray drying, or grinding by a jet mill to obtain the alumina for lithium battery separation membranes. According to the present invention, sodium oxide impurities can be removed through the hydrothermal reaction; and the obtained alumina has characteristics of high chemical purity, controllable crystal micro-morphology and relatively narrow particle size distribution, has the Al2O3 content of more than or equal to 99.95%, has the Na2O content of less than or equal to 0.02%, has the contents of impurities such as Fe2O3 and the like of less than or equal to 70 ppm, mainly has spherical and cubic structure, has a specific surface area of 3.5-6.0 m /g, and can meet the requirements of electrochemical performance and safety performance of lithium battery separation membrane materials.
Patent
08 Sep 2020
TL;DR: In this paper, an ultrasonic-assisted dealloying method for nano-porous T-M fine powder was proposed, which can realize low-cost and large-scale production of the nano-POROUS T-mfine powder.
Abstract: The invention relates to a preparation method of a nano-porous powder material. The method comprises the following steps: firstly, removing A in an AxTy alloy through an ultrasonic-assisted dealloyingmethod to prepare nano-porous T coarse powder, then carrying out an M-reaction process on the nano-porous T coarse powder and an M-containing gas reactant to obtain nano-porous T-M coarse powder, andfinally, further crushing the nano-porous T-M coarse powder through a jet mill to obtain nano-porous T-M fine powder. The method can realize low cost and large-scale production of the nano-porous T-Mfine powder, and has a wide application prospect.
Patent
Thomas Garoff1, Timo Leinonen1
01 Jun 1989
TL;DR: In this article, the particle structure of carrier compounds for polymerization cata-lysts was improved by jet grinding one or more carrier com-pounds, or a mixture of the same, in a grinding chamber in a gas jets, in such a way that the particles are pulverized into a fine-ly divided chemically active carrier.
Abstract: The invention relates to the improving of the particle structure of carrier compounds for polymerization cata­lysts, and thereby to the improving of the activity of the entire catalyst, by jet grinding one or more carrier com­pounds (4), or a mixture of the same, in a grinding chamber in which one or more gas jets (2) transport particles (4) of the material to be ground finely, at such a force against each other and/or against one or more anvils (5) of the jet mill that the particles are pulverized into a fine­ly-divided chemically active carrier.

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202118
202035
201928
201831
201723
201623