Bulk material cleaner (1) comprising a support frame (2) and a screen housing (3), which can be oscillated and/or vibrated by a drive (5). At least one screen (6) is arranged in the screen housing (3). The screen housing has a feed opening (7) and at least two outlet openings (8, 9), the outlet openings (8, 9) being for a first fraction (F1) and a second fraction (F2), respectively. Moreover, the bulk material cleaner (1) comprises an air separator (10), which is only fastened on the screen housing (3).

Bulk material cleaner (1) comprising a support frame (2) and a screen housing (3), which can be oscillated and/or vibrated by a drive (5). At least one screen (6) is arranged in the screen housing (3). The screen housing has a feed opening (7) and at least two outlet openings (8, 9), the outlet openings (8, 9) being for a first fraction (F1) and a second fraction (F2), respectively. Moreover, the bulk material cleaner (1) comprises an air separator (10), which is only fastened on the screen housing (3).

The powder classifying apparatus classifies raw material powder having a particle size distribution into fine powder and coarse powder and includes a disk-like centrifuge chamber formed as a space between two facing members, a plurality of air nozzles for supplying gas into the centrifuge chamber to generate a whirling stream, a raw material ejecting nozzle for supplying the raw material powder to the whirling stream generated in the centrifuge chamber, a fine powder collecting tube disposed in a central portion of one of the two facing members and communicating with the centrifuge chamber to discharge the gas including the fine powder separated in the centrifuge chamber to the outside, a cylindrical first wall disposed at an opening portion formed of the fine powder collecting tube, and a cylindrical second wall disposed on the other one of the two facing members and facing the first wall with a given interval.

The present invention relates to a device (1) for sorting powder particles into ranges of particles according to one or more of a density, size and/or shape of the particles, wherein the device (1) comprises a particle sorting chamber (2) with at least one sloping side wall (3), which side wall (3) slopes from a lower part (4) of the sorting chamber (2) towards an upper part (5) thereof, wherein the lower part (4) of the sorting chamber (2) is larger dimensioned than the upper part (5), wherein at the upper part (5) of the particle sorting chamber (2) an inlet (6) is provided for supplying a flow of the powder particles to be sorted to the sorting chamber (2), wherein a particle outlet (7) is provided in the upper part (5) of the sorting chamber (2) for conducting sorted particles from the sorting chamber (2) through a duct (8) to at least one particle sedimentation classifier (9), wherein in the lower part (4) of the sorting chamber (2) means (11) are provided for generating an upward rotating gas flow in the sorting chamber (2), the rotating gas flow having a rotation axis which corresponds to an upward axis (10) of the sorting chamber (2).

The present invention relates to a device (1) for sorting powder particles into ranges of particles according to one or more of a density, size and/or shape of the particles, wherein the device (1) comprises a particle sorting chamber (2) with at least one sloping side wall (3), which side wall (3) slopes from a lower part (4) of the sorting chamber (2) towards an upper part (5) thereof, wherein the lower part (4) of the sorting chamber (2) is larger dimensioned than the upper part (5), wherein at the upper part (5) of the particle sorting chamber (2) an inlet (6) is provided for supplying a flow of the powder particles to be sorted to the sorting chamber (2), wherein a particle outlet (7) is provided in the upper part (5) of the sorting chamber (2) for conducting sorted particles from the sorting chamber (2) through a duct (8) to at least one particle sedimentation classifier (9), wherein in the lower part (4) of the sorting chamber (2) means (11) are provided for generating an upward rotating gas flow in the sorting chamber (2), the rotating gas flow having a rotation axis which corresponds to an upward axis (10) of the sorting chamber (2).

A method for continuous aeraulic separation of particulate materials consisting of a mixture of particles that is heterogeneous in both particle size and density is provided. The method includes grinding particles of materials, generating a gas stream conveying the ground particles, first aeraulic separation on the gas stream in order to separate the particles it contains into a first fraction consisting of the coarsest particles with variable densities and a second fraction consisting of the finest particles. A second aeraulic separation is performed on the first fraction in order to separate the particles that it contains into a third fraction consisting of the coarsest and/or most dense particles and a fourth fraction consisting of the least coarse and/or the least dense particles. A re-injecting of the third fraction or the fourth fraction at the inlet of the grinding is performed while simultaneous recovery of the second fraction as well as the fourth fraction or the third fraction, respectively, as output products.

A method for continuous aeraulic separation of particulate materials consisting of a mixture of particles that is heterogeneous in both particle size and density is provided. The method includes grinding particles of materials, generating a gas stream conveying the ground particles, first aeraulic separation on the gas stream in order to separate the particles it contains into a first fraction consisting of the coarsest particles with variable densities and a second fraction consisting of the finest particles. A second aeraulic separation is performed on the first fraction in order to separate the particles that it contains into a third fraction consisting of the coarsest and/or most dense particles and a fourth fraction consisting of the least coarse and/or the least dense particles. A re-injecting of the third fraction or the fourth fraction at the inlet of the grinding is performed while simultaneous recovery of the second fraction as well as the fourth fraction or the third fraction, respectively, as output products.

The invention relates to a method and system for the environmental remediation of materials that are contaminated with heavy minerals, such as heavy metals. The invention finds utility in removing heavy minerals from materials such as soils, sediments, mine tailings and ores. The invention provides a means for removing heavy minerals from contaminated materials without the use of water while reducing the generation of dust. Thus, the invention provides an environmentally friendly method for the remediation of sites that are contaminated with heavy minerals.

The invention relates to a method and system for the environmental remediation of materials that are contaminated with heavy minerals, such as heavy metals. The invention finds utility in removing heavy minerals from materials such as soils, sediments, mine tailings and ores. The invention provides a means for removing heavy minerals from contaminated materials without the use of water while reducing the generation of dust. Thus, the invention provides an environmentally friendly method for the remediation of sites that are contaminated with heavy minerals.

A vortex dryer for fibrous material utilizes a helical inlet to the base of a central vortex tube to separate fiber from debris by abruptly changing direction of the conveying air flow. The dryer combines the helical input with helical shaping of the air flow through the central vortex tube to induce greater drying for the fiber which is continued at the top of the vortex tube through a separate drying chamber.