A sifter serves for separating coarse particles from a particle-carrying stream during the manufacture of wood material panels, in particular wood fiber panels. The sifter has a housing forming a chamber and having a material inlet for admitting the particle-carrying stream to the chamber, at least one air inlet below the material inlet for admitting an air stream to the chamber, an exhaust-air outlet for conveying air and fine particles from the chamber, and a coarse-particle outlet for conveying coarse particles out of the chamber. An upper front wall of the housing above the air inlet is oriented at least partially at an angle to the vertical. An upper edge of the air inlet is either vertically aligned above a lower edge of the air inlet or projects by an amount beyond the lower edge into the chamber.

A sifter serves for separating coarse particles from a particle-carrying stream during the manufacture of wood material panels, in particular wood fiber panels. The sifter has a housing forming a chamber and having a material inlet for admitting the particle-carrying stream to the chamber, at least one air inlet below the material inlet for admitting an air stream to the chamber, an exhaust-air outlet for conveying air and fine particles from the chamber, and a coarse-particle outlet for conveying coarse particles out of the chamber. An upper front wall of the housing above the air inlet is oriented at least partially at an angle to the vertical. An upper edge of the air inlet is either vertically aligned above a lower edge of the air inlet or projects by an amount beyond the lower edge into the chamber.

A dry-granulation method for producing a tablet comprising (a) pharmaceutical active ingredient in an amount 50-90% w/w and (b) one or more excipients in an amount 10-50% w/w including at least a binder which comprises (i) preparing granules from a powder comprising a binder, a pharmaceutically active ingredient and optionally one or more other excipients or pharmaceutical active ingredients by a process characterized in that a compaction force is applied to the powder to produce a compacted mass comprising a mixture of fine particles and granules and separating and removing fine particles and/or small granules from the granules by entraining the fine particles and/or small granules in a gas stream in which the compacted mass flows, wherein the direction of the flow of the gas stream has a component which is contrary to that of the direction of flow of the compacted mass, and collecting the accepted granules (ii) blending the accepted granules with other components of the tablet in granular or fine powder form wherein in step (ii) at least one other component of the tablet formulation is in granular form and is prepared from a powder comprising said other component by a process characterized in that a compaction force is applied to the powder to produce a compacted mass comprising a mixture of fine particles and granules and separating and removing fine particles and/or small granules from the granules by entraining the fine particles and/or small granules in a gas stream in which the compacted mass flows, wherein the direction of the flow of the gas stream has a component which is contrary to that of the direction of flow of the compacted mass; and (iii) compressing the resultant blend to form a tablet; with the proviso that the tablet does not comprise (a) paracetamol, maize starch and microcrystalline cellulose in a ratio of 60:20:20 w/w, (b) acebutolol HCl and starch in a ratio of 90:10 w/w, (c) sodium valproate, hypromellose and maize starch in a ratio of 90:5:5 w/w, (d) ketoprofen and maize starch in a ratio of 50:50 w/w or (e) metformin HCl, microcrystalline cellulose and maize starch in a ratio of 80:14:6 w/w.

The invention provides, inter alia, a method for producing granules from a powder, characterized in that compaction force is applied to the powder to produce a compacted mass comprising a mixture of fine particles and granules and separating and removing fine particles and/or small granules from the other granules by entraining the fine particles and/or small granules in a gas stream. Also provided are apparatus for use in the process and tablets formed by compression of the resultant granules.

The invention provides, inter alia, a method for producing granules from a powder, characterized in that compaction force is applied to the powder to produce a compacted mass comprising a mixture of fine particles and granules and separating and removing fine particles and/or small granules from the other granules by entraining the fine particles and/or small granules in a gas stream. Also provided are apparatus for use in the process and tablets formed by compression of the resultant granules.

A dedusting apparatus is provided with movable inlet deflectors that are positionally controlled by actuators to vary the rate of flow of particulate material over the wash decks. The inlet deflectors are formed with a fixed member that extends between the front and rear walls of the dedusting apparatus and extends downwardly from the top wall to terminate in a spaced relationship to the surface of the wash decks. A movable member is operatively coupled to an actuator to overlie the fixed member and be movable to be adjacent the surface of the wash deck to terminate flow of material past the deflectors. Particulate material can accumulate above the wash decks and between the deflectors to fill the volume to the inlet opening to permit a full loading of flow over the full width of the wash decks when the deflectors are raised by the actuators.

A dedusting apparatus is provided with movable inlet deflectors that are positionally controlled by actuators to vary the rate of flow of particulate material over the wash decks. The inlet deflectors are formed with a fixed member that extends between the front and rear walls of the dedusting apparatus and extends downwardly from the top wall to terminate in a spaced relationship to the surface of the wash decks. A movable member is operatively coupled to an actuator to overlie the fixed member and be movable to be adjacent the surface of the wash deck to terminate flow of material past the deflectors. Particulate material can accumulate above the wash decks and between the deflectors to fill the volume to the inlet opening to permit a full loading of flow over the full width of the wash decks when the deflectors are raised by the actuators.

This invention relates to a cyclone for dense medium separation that includes an inverted conical shaped cyclone body which provides an interior space having an inner wall surface a vortex finder including a lower end that extends longitudinally into an upper region of the interior space of the cyclone body an overflow outlet associated with an upper end of the vortex finder a feed inlet that is in fluid communication with the upper region of the interior space of the cyclone body an outlet associated with a lower region of the interior space and the inner wall surface of the interior space curves inwardly and downwardly from the upper region curves inwardly and downwardly from the upper region of the interior space to the lower region of the interior space.

A toner producing apparatus including: a foreign matter separating unit including a foreign matter separating chamber for separating metallic foreign matters contained in raw powder material of toner from the raw powder material of toner by using gravity, a feeding pipe connected to the foreign matter separating chamber so as to feed the raw powder material of toner into the foreign matter separating chamber, and an exhausting pipe connected to the foreign matter separating chamber so as to exhaust the raw powder material of toner from the foreign matter separating chamber; and a pulverizing unit including a rotor, the pulverizing unit being connected to the exhausting pipe of the foreign matter separating unit.

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).