Abstract: A cyclone structured for separating feed material having mixtures of differently sized material, the cyclone having a separating section and an inlet head having a feed inlet zone, wherein the feed inlet zone has a volute axis and adjacent sectors in which the volute axis progressively decreases relative to and in the direction of the central axis through subsequent sectors extending downstream from the inlet port of the inlet head. The inlet head is also structured with a vortex finder extending into the feed chamber a distance L1, and an inlet port formed in the inlet head which extends a vertical distance H1, such that the ratio of L1 to H1 is less than one (L1:H1=0.0 to 0.95).

Abstract: A cyclone structured for separating feed material having mixtures of differently sized material, the cyclone having a separating section and an inlet head having a feed inlet zone, wherein the feed inlet zone has a volute axis and adjacent sectors in which the volute axis progressively decreases relative to and in the direction of the central axis through subsequent sectors extending downstream from the inlet port of the inlet head. The inlet head is also structured with a vortex finder extending into the feed chamber a distance L1, and an inlet port formed in the inlet head which extends a vertical distance H1, such that the ratio of L1 to H1 is less than one (L1:H1=0.0 to 0.95).

Abstract: An inlet head for a cyclone, the inlet head including a feed chamber therein having an inner side wall, a top or end wall at one end of the side wall, an open end at the other end of the side wall, the open end being of circular cross-section with a central axis, an inlet port adjacent the top or end wall for delivering an inlet stream of material to be separated to the feed chamber, an overflow outlet in the top or end wall which is coaxial with the central axis, a vortex finder extending into the feed chamber in the direction of the central axis through which an overflow stream of separated material passes to the overflow outlet.

Abstract: An inlet head for a cyclone, the inlet head including a feed chamber therein having an inner side wall, an end wall at one end of the side wall, an open end at the other end of the side wall, the open end being of circular cross-section with a central axis. The inlet head further includes an inlet port adjacent the end wall for delivering material to be separated to the feed chamber, the inlet port having a feed height dimension H1 in the direction of the central axis, an overflow outlet in the end wall which is coaxial with the central axis, a vortex finder at the end wall or extending into the feed chamber in the direction of the central axis a distance L1 from the end wall, and a feed inlet zone in the inner side wall of the feed chamber having an upstream end adjacent the inlet port and a downstream end.

Abstract: An inlet head for a cyclone, the inlet head including a feed chamber therein having an inner side wall, an end wall at one end of the side wall, an open end at the other end of the side wall, the open end being of circular cross-section with a central axis. The inlet head further includes an inlet port adjacent the end wall for delivering material to be separated to the feed chamber, the inlet port having a feed height dimension H1 in the direction of the central axis, an overflow outlet in the end wall which is coaxial with the central axis, a vortex finder at the end wall or extending into the feed chamber in the direction of the central axis a distance L1 from the end wall, and a feed inlet zone in the inner side wall of the feed chamber having an upstream end adjacent the inlet port and a downstream end.

Abstract: A hydrocyclone which includes a main body having a chamber therein, the chamber including an inlet section, and a separating section, the separating section having an inner side wall which tapers inwardly away from the inlet section, the hydrocyclone further including a feed inlet feeding a particle bearing slurry mixture into the inlet section of the chamber, an overflow outlet at one end of the chamber adjacent the inlet section thereof, and an underflow outlet at the other end of the chamber remote from the inlet section of the chamber. The hydrocyclone further includes an overflow outlet control chamber adjacent the inlet section of the chamber of the hydrocyclone and in communication therewith via the overflow outlet, the overflow outlet control chamber including a tangentially located discharge outlet and a centrally located air core stabilising orifice which is remote from the overflow outlet.

Abstract: The main technical problem with Dual Cyclones with Water Injection used as classifiers in grinding circuits is that they do not allow for control and regulation of the input velocity ratio between the first and second cyclone as well as the high pressure required at the intake of the first cyclone to achieve a sound operation of the second cyclone. The disclosed invention solves the technical problem by making the feeding and discharge of both cyclones' overflows form a volute in the horizontal plane with the body of the respective cyclone and by placing, between its bottom and the expansion zone, a selectively, axially-positionable member.