Jet mill

About: Jet mill is a research topic. Over the lifetime, 803 publications have been published within this topic receiving 5686 citations.

Fluidized bed jet mill

Abstract: The method and apparatus disclosed relates to an improved jet mill in which the material to be ground is fed into a chamber or zone containing a jet that emanates from a nozzle with high velocity, the material being in the state of a compact bed and the outlet of the nozzle being located beneath the surface of the bed. The bed is preferably a ''''moved compact bed'''' arranged so that the material to be ground is fed sideways into the jet. A sifter or classifier for the coarse and fine material produced in the grinding operation is arranged above the bed of material in the grinding chamber or zone. The compact bed of material may be moved in a variety of ways, and the volume occupied by it is filled up to the greater part with compact granular material. This could be defined as the ratio of wholly occupied volume to the volume of the compact matter, or by the term ''''compact current'''' as commonly employed in the pneumatic transportation art.

Physicochemical Properties of Hull-less Barley Flours Prepared with Different Grinding Mills

Abstract: During the pearling process of hull-less barley, protein, lipid, ash and insoluble dietary fiber (IDF) contents decreased, while soluble dietary fiber (SDF) and contents slightly increased. Depending on milling methods and types of grinding mills used, there were differences in particle size distribution of barley flour. Flour particle size was smaller in the following order of Fitz mill, Ball mill, Pin mill, Cyclotec sample mill and Jet mill. Color (brightness) was closely related to the particle size of barley flour. Damaged starch (%) in pearled barley flour was the highest in Jet mill among different mills. Flours prepared with Cyclone mill and Pin mill had a reasonable amount of damaged starch. Flour produced by Fitz mill showed the lowest amount of damaged starch. Scanning electron microscopy (SEM) of the flour samples demonstrated different sizes and shapes of particles consisting of starch granules and cell wall materials. Damaged starch tended to increase water absorption index (WAI), water solubility index (WSI), and water retention capacity (WRC). Pasting viscosity determined by amylograph was relatively high in Pin-milled and Cyclone-milled flours. Viscosity was the lowest in coarsely ground flour by Fits mill.

Non-aqueous secondary battery and a method of manufacturing graphite powder

Abstract: Provided is a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics. Graphite powder having a maximum particle diameter of less than 100 μm and an existing reaction of rhombohedral structure in the crystalline structure of less than 20% is used as an active material for the negative electrode of the non-aqueous secondary battery. The graphite powder can be obtained by pulverizing raw graphite with a jet mill, and subsequently treating the powder at a temperature equal to or higher than 900°C.

Grinding process using a jet mill

Abstract: Energy-rich grinding jets of hot steam are introduced into the grinding chamber (3) and at the meeting point between the grinding material and at least one grinding jet the grinding jet and grinding material have roughly the same temperature The temperature of the material can be matched to the temperature of grinding jet by providing a heat generator (7) in the area between the material inlet and the meeting point of material and steam jet