A classifying wheel for a centrifugal-force air classifier where the flow pattern of the classifying air is contrary to its centrifugal direction, namely centripetal, and which is equipped with extensions fitted to the classifying wheel vanes within the flow channels which influence the flow pattern is to be executed in wear-protected design. This is achieved in that the classifying wheel has at least one reinforcing ring which has uniformly spaced hooks arranged around its periphery which fix the classifying wheel vanes to the extensions so that the outside radial edge of the classifying wheel vanes is not in contact with the reinforcing ring.

A half round dedusting apparatus for removes dust and debris from particulate material passing through the dedusting apparatus. The configuration of the dedusting apparatus includes a half round cylindrical housing in which is mounted a partial cone wash deck having a reverse partial cone deflector that is vertically moveable to vary the flow rate of particulate material passing over the wash deck. The product inlet port is preferably circular and directs contaminant-laden particulate material inside the deflector to pass over the surface of the wash deck. The housing has a greater diameter than the maximum diameter of the wash deck to establish a Venturi zone around the circumference of the wash deck. The wash deck and deflector are detachably mounted within the housing to allow removal thereof for ease of cleaning the wash deck and also the interior of the housing.

Methods and apparatus for separating polysilicon powder from a mixture of granular polysilicon and polysilicon powder are disclosed. The method includes tumbling the polysilicon material in a tumbling device while flowing humidified sweep gas through the tumbling device. Also disclosed are compositions including granulate polysilicon or polycrystalline silicon, in some examples, including a coating layer consisting essentially of water.

A device for cleaning and fine-sorting grain metallurgical waste fines and the method for cleaning and fine-sorting grain metallurgical waste fines. The material is fed to the device for cleaning of fine metallurgical waste from the feeding tank (1), by means of a feeding mechanism (2) and is transported to initial separator (3), into which air is blown with a fan (4). The most dusty fractions hovering in the initial separator (3) are directed to the collector (6). However, the largest fractions of metallurgical waste fall to the bottom part, and they are removed with a cascade pipeline (7) directed upwards to the cascade separator (8). Lighter fractions accumulated in the cascade separator (8), are directed to the collector (6), and then to the next cascade separator (15), from where lighter and finer fractions of metallurgical waste are directed to expanded cascade separator (16), and the lightest fraction of waste are then directed to the cyclone dust collector (18).

A device for cleaning and fine-sorting grain metallurgical waste fines and the method for cleaning and fine-sorting grain metallurgical waste fines. The material is fed to the device for cleaning of fine metallurgical waste from the feeding tank (1), by means of a feeding mechanism (2) and is transported to initial separator (3), into which air is blown with a fan (4). The most dusty fractions hovering in the initial separator (3) are directed to the collector (6). However, the largest fractions of metallurgical waste fall to the bottom part, and they are removed with a cascade pipeline (7) directed upwards to the cascade separator (8). Lighter fractions accumulated in the cascade separator (8), are directed to the collector (6), and then to the next cascade separator (15), from where lighter and finer fractions of metallurgical waste are directed to expanded cascade separator (16), and the lightest fraction of waste are then directed to the cyclone dust collector (18).

A compact dedusting apparatus for cleaning particulate materials of contaminates and has a housing defining a cleaning area in which the contaminants are removed to create cleaned particulate material with a product discharge opening through which cleaned particulate material can be discharged. The dedusting apparatus includes an infeed apparatus having a vibratory feed pan powered by a vibration generator to induce vibrations therein. The dedusting apparatus also includes a Venturi chamber to remove contaminants from the particulate material by a flow of air passing upwardly through the product discharge opening. The dedusting apparatus further includes an interchangeable carryover deflector having a chamber extension member that aligns with internal structure to control the flow of particulate material into said Venturi chamber and deflects particulate material entrained in the air flow through the Venturi chamber toward the product discharge opening. The carryover deflector incorporates an observation window to view the dedusting operation.

A classifying wheel for a centrifugal-force air classifier where the flow pattern of the classifying air is contrary to its centrifugal direction, namely centripetal, and which is equipped with extensions fitted to the classifying wheel vanes within the flow channels which influence the flow pattern is to be executed in wear-protected design. This is achieved in that the classifying wheel has at least one reinforcing ring which has uniformly spaced hooks arranged around its periphery which fix the classifying wheel vanes to the extensions so that the outside radial edge of the classifying wheel vanes is not in contact with the reinforcing ring.

A classifying wheel for a centrifugal-force air classifier where the flow pattern of the classifying air is contrary to its centrifugal direction, namely centripetal, and which is equipped with extensions fitted to the classifying wheel vanes within the flow channels which influence the flow pattern is to be executed in wear-protected design. This is achieved in that the classifying wheel has at least one reinforcing ring which has uniformly spaced hooks arranged around its periphery which fix the classifying wheel vanes to the extensions so that the outside radial edge of the classifying wheel vanes is not in contact with the reinforcing ring.

The invention relates to a unit for the micronization of a solid active agent, such as a salt, preferably table salt (NaCI), for inhalation, comprising a micronizer driven by a motor. The unit according to the invention is characterised in that micronization is performed by a unit constituted by a closed rotary drum (2) receiving a solid active agent having the same grain size, preferably 0.1-4 mm, as table salt (NaCI), where the wall surfaces of the micronizer unit are made at least in part of a material having a filtering capacity of 0.1-1000 m, the material preferably being a mesh-like or microperforated material. A further unit according to the invention is characterised in that the micronizer consists of a rotary block (23) made of the active agent, a friction block (24) adapted to be in frictioning relation with the rotary block, and a clamping mechanism (25) adapted for holding the friction block (24) in position and for clamping the friction block (24) to the rotary block (23), the micronizer being disposed in a closed housing (11), and the wall surfaces of the housing (11) being at least in part made of a material having a filtering capacity of 0.1-1000 m.

A device for cleaning and fine sorting grain metallurgical waste fines and the method for cleaning and fine-sorting grain metallurgical waste fines. The material is fed to the device for cleaning of fine metallurgical waste from the feeding tank (1), by means of a feeding mechanism (2) and is transported to initial separator (3), into which air is blown with a fan (4). The most dusty fractions hovering in the initial separator (3) are directed to the collector (6). However, the largest fractions of metallurgical waste fall to the bottom part, and they are removed with a cascade pipeline (7) directed upwards to the cascade separator (8). Lighter fractions accumulated in the cascade separator (8), are directed to the collector (6), and then to the next cascade separator (15), from where lighter and finer fractions of metallurgical waste are directed to expanded cascade separator (16), and the lightest fraction of waste are then directed to the cyclone dust collector (18).