This invention prevents adhesion of powder to the inner wall of a pulverization container of a powder pulverization device. A powder pulverization device 10 comprises a hermetically sealed pulverization container 20; a powder introduction mechanism 30 having an introduction inlet 31a opened inwardly to the pulverization container 20, and introducing powder to be pulverized to the introduction inlet 31a; a powder pulverization mechanism 40 disposed at a portion below the introduction inlet 31a in the pulverization container 20 for causing high-pressure air to collide with powder, thereby pulverizing the powder; and a classification device 50 disposed at a portion above the introduction inlet 31a in the pulverization container 20 for screening pulverized powder and leading the screened powder out from the pulverization container 20, wherein an inner wall 20a of the pulverization container 20 is covered with a porous lining material 60A/60B and each hole 65 of the lining material 60A/60B communicates with an air supply device 62 via a gap 61A/61B between the inner wall 20a and the lining material 60A/60B.

This invention prevents adhesion of powder to the inner wall of a pulverization container of a powder pulverization device. A powder pulverization device 10 comprises a hermetically sealed pulverization container 20; a powder introduction mechanism 30 having an introduction inlet 31a opened inwardly to the pulverization container 20, and introducing powder to be pulverized to the introduction inlet 31a; a powder pulverization mechanism 40 disposed at a portion below the introduction inlet 31a in the pulverization container 20 for causing high-pressure air to collide with powder, thereby pulverizing the powder; and a classification device 50 disposed at a portion above the introduction inlet 31a in the pulverization container 20 for screening pulverized powder and leading the screened powder out from the pulverization container 20, wherein an inner wall 20a of the pulverization container 20 is covered with a porous lining material 60A/60B and each hole 65 of the lining material 60A/60B communicates with an air supply device 62 via a gap 61A/61B between the inner wall 20a and the lining material 60A/60B.

A graphene preparing apparatus for exfoliating graphite includes a high-pressure water pump for generating a high-pressure flow of water, a waterjet nozzle for receiving the water and for generating a pulsed or cavitating waterjet, a graphite supply vessel having a supply duct for supplying graphite powder, an exfoliation chamber that has a first inlet for receiving the waterjet and a second inlet for receiving the graphite powder, an outlet through which a graphite slurry is expelled from the exfoliation chamber, a filtering unit downstream of the exfoliation chamber for separating graphene from the slurry and a graphene collection tank for collecting the graphene.

A graphene preparing apparatus for exfoliating graphite includes a high-pressure water pump for generating a high-pressure flow of water, a waterjet nozzle for receiving the water and for generating a pulsed or cavitating waterjet, a graphite supply vessel having a supply duct for supplying graphite powder, an exfoliation chamber that has a first inlet for receiving the waterjet and a second inlet for receiving the graphite powder, an outlet through which a graphite slurry is expelled from the exfoliation chamber, a filtering unit downstream of the exfoliation chamber for separating graphene from the slurry and a graphene collection tank for collecting the graphene.

A grinding, separating, and discharging of hard to grind parts of a material mixture of components with different grindability from a spiral jet mill, wherein the hard to grind parts are discharged from the process chamber via at least one additional discharge nozzle. A spiral jet mill for comminuting and classifying grinding material, including at least one process chamber, wherein this at least one process chamber is enclosed by a housing, at least one grinding material feeding, which leads into the at least one process chamber, at least two grinding nozzles, a fine material outlet, which is radially enclosed by a separator wheel, wherein at least one discharge nozzle is assigned to the process chamber.

The proposed multifunctional hydrodynamic vortex type reactor includesa housing having curvilinear inner sidewalls,a base attached to the housing, an inverse taper narrowing downward and attached to the top of housing,a supporting tube passing at least through the housing and base,a set of washers tapered downward and mounted on an outer surface of the supporting tube such that outer upper edges of the set of washers and the inner sidewalls form predetermined gaps therebetween, anda number of inlets tangentially attached to the base for introducing, under external pressure, a solid substance and a liquid (or a suspension of their mixture) thereinto, forming a circulating flow therein. The flow forms a high speed bypassing cavitation zone and, changing its direction at the inverse taper, forms a vortex cavitation zone, providing for mixing and grinding the substance up to nanoscale sizes. Methods for intensifying cavitation are also provided.

Various wear resistance designs may be applied to a reactor configured to facilitate chemical reactions, and/or comminution using shockwaves created in a supersonic gaseous vortex. The reactor may include a rigid chamber having a substantially circular cross-section. A first gas inlet may be configured to introduce a high-velocity gas stream into the chamber. A first replaceable wear part may be disposed in the chamber to absorb wear impact caused by the gas stream. In some implementations, the first replaceable wear part may be a cylindrical rod continuously fed into the chamber. In some implementations, the first replaceable wear part may be coated with, or composed of, a catalytic material, and/or may be electrically isolated from the rest of the reactor. In some implementations, a second gas inlet may be disposed to steer the gas stream to a desired area within the chamber to even out the wear impact.

Various wear resistance designs may be applied to a reactor configured to facilitate chemical reactions, and/or comminution using shockwaves created in a supersonic gaseous vortex. The reactor may include a rigid chamber having a substantially circular cross-section. A first gas inlet may be configured to introduce a high-velocity gas stream into the chamber. A first replaceable wear part may be disposed in the chamber to absorb wear impact caused by the gas stream. In some implementations, the first replaceable wear part may be a cylindrical rod continuously fed into the chamber. In some implementations, the first replaceable wear part may be coated with, or composed of, a catalytic material, and/or may be electrically isolated from the rest of the reactor. In some implementations, a second gas inlet may be disposed to steer the gas stream to a desired area within the chamber to even out the wear impact.

Apparatus for reducing a particle size of a precursor powder material by fluid energy impact according to one embodiment of the invention may include a housing defining an interior milling cavity therein having a peripheral wall. A powder feed inlet operatively associated with the housing introduces the precursor powder material into the interior milling cavity. A feed gas inlet operatively associated with the powder feed inlet introduces a feed gas into the interior milling cavity. A product discharge outlet operatively associated with the housing removes a milled powder product from the interior milling cavity. An oil injection nozzle assembly operatively associated with the product discharge outlet injects oil into a particle-laden product stream from the product discharge outlet.

Apparatus for reducing a particle size of a precursor powder material by fluid energy impact according to one embodiment of the invention may include a housing defining an interior milling cavity therein having a peripheral wall. A powder feed inlet operatively associated with the housing introduces the precursor powder material into the interior milling cavity. A feed gas inlet operatively associated with the powder feed inlet introduces a feed gas into the interior milling cavity. A product discharge outlet operatively associated with the housing removes a milled powder product from the interior milling cavity. An oil injection nozzle assembly operatively associated with the product discharge outlet injects oil into a particle-laden product stream from the product discharge outlet.