Abstract: In consideration of increasing throughput rate of a stable operating process as well as making the process energy-efficient, the aim is to optimise a fluidised bed opposed jet mill and a dedicated process to produce ultrafine particles from a feed material of low bulk density with a housing in vertical design, with a product feed point and a product discharge, with a grinding zone located in the lower area of the housing which has grinding nozzles spaced evenly around the circumference whose jets intersect at one central point and with a classifying device installed in the upper area of the housing. This is achieved by the feed material dosed to the mill from the bottom into the mill sump as a gas-particle mixture, whereby a deflector hood is located above the feed point and below the grinding nozzle level, and the grinding gas nozzles designed to be flush with the walls.

Abstract: In consideration of increasing throughput rate of a stable operating process as well as making the process energy-efficient, the aim is to optimise a fluidised bed opposed jet mill and a dedicated process to produce ultrafine particles from a feed material of low bulk density with a housing in vertical design, with a product feed point and a product discharge, with a grinding zone located in the lower area of the housing which has grinding nozzles spaced evenly around the circumference whose jets intersect at one central point and with a classifying device installed in the upper area of the housing. This is achieved by the feed material dosed to the mill from the bottom into the mill sump as a gas-particle mixture, whereby a deflector hood is located above the feed point and below the grinding nozzle level, and the grinding gas nozzles designed to be flush with the walls.

Abstract: The invention relates to a thermal combustion engine which converts thermal energy into mechanical energy, comprising at least one vapour producing device which at least partially vaporises a first liquid working medium by means of thermal energy supplied to the combustion engine, at least one rotor which can be driven by means of a vaporised first working medium in order to produce mechanical energy and rotated with respect to at least one stator around a first rotational axis, and at least one condensation device for condensation of the vaporised first working medium after the rotor has been driven. The rotor surrounds the stator in an essentially complete manner. The invention also relates to the use of the inventive thermal combustion engine.