An apparatus for separating a granular material from a conveying air stream (5) comprising a deflecting surface (2) for the laden conveying air stream (5) against which flow may take place substantially tangentially is described. In order to allow advantageous separation conditions, it is proposed that the deflecting surface (2) adjoins a guiding surface (3) curved in the opposite direction in the flow direction for a largely laminar flow separation.

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 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.

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.

Example implementations relate to a guard positionable in a 3D printing system to limit a passing of oversized particles of material to downstream of the guard. As an example, a guard comprises a portion aligned with an axis, the axis being parallel to a direction of travel of particles. The guard also comprises a guard member to direct particles away from the axis.

A debris removal system for an agricultural harvester may include an extractor having an extractor housing defining a central airflow channel for directing debris through the extractor from a central inlet to a central outlet. The extractor housing may further define an outer airflow channel surrounding the central airflow channel. The outer airflow channel may define a flow path between an outer housing inlet and an outer airflow outlet. Additionally, the extractor housing may include an internal divider wall extending between the central and outer airflow channels. Moreover, the system may include at least one flow-generating device provided in operative association with the housing. The flow-generating device(s) may be configured to generate an airflow directed through the outer airflow channel, wherein the airflow generates a negative pressure within the central airflow channel that draws the debris into the extractor housing via the central airflow inlet.

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.

An aerodynamic recirculating separator of bulk materials that includes an air blower capable of forming an air stream, an outlet stream directing means, a separation chamber including two inlets and two outlets, a loading hopper, at least one discharge channel, a return air duct including a plurality of turning portions, and at least one residue collection chamber. An outlet of the air blower connects to the first inlet of the separation chamber, an outlet of the loading hopper connects to the second inlet of the separation chamber, the first outlet of the separation chamber connects to the return air duct, and the second outlet of the separation chamber connects to the at least one discharge channel. The air blower, the separation chamber, and the return air duct are consecutively connected so as to form a recirculation channel. The separator forms a material particle flow from the loading hopper to the separation chamber, to distribute commercial particles by their aerodynamic parameters in the separation chamber as the commercial particles fall from the loading hopper and are blown by the air stream formed by the air blower, and to remove the commercial particles through the at least one discharge channel. The separator forces remaining material particles into the at least one horizontally flared portion, directs at least a part of the remaining material particles into a residue collection chamber by way of gravity, and injects air into the separation chamber via the discharge channels. The first downstream horizontally flared portion includes a downwardly curved bottom wall and an opening in communication with said flared portion and the external environment. The opening is disposed in a smooth turn zone from said flared portion to the first of the plurality of turning portions, which has an upward turn.