A basket system for a shale shaker includes a front, solids discharge end and a rear, feed end, spaced apart by opposed first and second sides. The feed end includes a fluid retaining wall. A first screen deck frame is mounted or mountable to the basket for supporting a screening surface and forming a first screen deck in use. The screening surface of the first screen deck has a lower, feed receiving end that is proximal to the fluid retaining wall at the rear end of the basket and a distal, higher, solids discharge end at the front end of the basket. The basket further includes at least one mounting for mounting at least one additional screen deck frame above or below the first screen deck frame.

An apparatus and method for the dry separation of bulk particulate material, especially coarse particles, is provided. The apparatus comprises a chamber, a screen adjacent the chamber and a fluidising device fluidly connected to the chamber. The screen has a screen surface, a plurality of apertures and an opening larger in size than the aperture. A mixture of the coarse particles and a fine particulate medium is fed into the chamber. The fluidising device directs a fluidising fluid to fluidise a fine particulate medium and create a fluidised bed directed towards the screen. The fine particulate medium and the coarse particles pass from the chamber through the openings. The fine particulate medium passes back through the apertures to the chamber. Relatively high density coarse particles also pass back through the openings to the chamber. Relatively low density coarse particles are retained on the screen surface. Vibrations may also be used.

An apparatus and method for the dry separation of bulk particulate material, especially coarse particles, is provided. The apparatus comprises a chamber, a screen adjacent the chamber and a fluidising device fluidly connected to the chamber. The screen has a screen surface, a plurality of apertures and an opening larger in size than the aperture. A mixture of the coarse particles and a fine particulate medium is fed into the chamber. The fluidising device directs a fluidising fluid to fluidise a fine particulate medium and create a fluidised bed directed towards the screen. The fine particulate medium and the coarse particles pass from the chamber through the openings. The fine particulate medium passes back through the apertures to the chamber. Relatively high density coarse particles also pass back through the openings to the chamber. Relatively low density coarse particles are retained on the screen surface. Vibrations may also be used.

A vibrating sieve machine for applying vibrations on powder to be classified that is placed on a mesh member through a sieve frame including a plurality of separable sieve frames for sieving and classification, wherein the mesh member includes a circular annular mesh member frame having an outer peripheral surface and configured to be sandwiched by the separable sieve frames with the outer peripheral surface exposed outward in a radial direction of the separable sieve frames, a reinforcement mesh stretching across the mesh member frame, a sieve mesh configured to cover the reinforcement mesh, hanging down over an outer peripheral surface of the mesh member frame, and a fastening band configured to be attached to the outer peripheral surface of the mesh member frame so as to sandwich the sieve mesh between the fastening band and the outer peripheral surface of the mesh member frame.

A vibrating sieve machine for applying vibrations on powder to be classified that is placed on a mesh member through a sieve frame including a plurality of separable sieve frames for sieving and classification, wherein the mesh member includes a circular annular mesh member frame having an outer peripheral surface and configured to be sandwiched by the separable sieve frames with the outer peripheral surface exposed outward in a radial direction of the separable sieve frames, a reinforcement mesh stretching across the mesh member frame, a sieve mesh configured to cover the reinforcement mesh, hanging down over an outer peripheral surface of the mesh member frame, and a fastening band configured to be attached to the outer peripheral surface of the mesh member frame so as to sandwich the sieve mesh between the fastening band and the outer peripheral surface of the mesh member frame.

This invention relates to a sieving apparatus and method for separating solid particles above a predetermined size from a fluid by carrying the solids-containing fluid across at least one sieving cloth in a frame connected to a shaking device for providing shaking motion. The sieving apparatus includes an inlet portion for receiving solids-containing fluid, a discharge portion for solids that have been carried across the at least one sieving cloth and an outlet portion for fluid that has passed through the sieving cloth. The sieving apparatus further includes at least one endless sieving cloth arranged for rotating around at least two spaced-apart turning-rollers, at least one being connected to a motor, and a pumping device in fluid communication with a suction nozzle located proximate an underside of the endless sieving cloth between two of the turning-rollers, to produce a fluid flow through at least a portion of the endless sieving cloth.

A vibratory screening apparatus including a support and at least two screen decks arranged one over the other as an assembly. Each screen deck includes a screen frame, a screen and a chamber underlaying the screen surface, an outlet duct for oversized material and an outlet duct for undersized material in communication with the chamber. Mountings are configured for mounting the assembly of the screen decks to the support. A drive support with a motor assembly is configured for vibrating the assembly of screen decks. A feed unit is configured to feed the material to be screened to each screen deck. The feed unit is arranged on the support and configured to be moved between a feed position and a maintenance position. The assembly of the at least two screen decks is resiliently arranged on the support, while the feed unit is non-resiliently arranged on the support.

A vibratory screening apparatus including a support and at least two screen decks arranged one over the other as an assembly. Each screen deck includes a screen frame, a screen and a chamber underlaying the screen surface, an outlet duct for oversized material and an outlet duct for undersized material in communication with the chamber. Mountings are configured for mounting the assembly of the screen decks to the support. A drive support with a motor assembly is configured for vibrating the assembly of screen decks. A feed unit is configured to feed the material to be screened to each screen deck. The feed unit is arranged on the support and configured to be moved between a feed position and a maintenance position. The assembly of the at least two screen decks is resiliently arranged on the support, while the feed unit is non-resiliently arranged on the support.

A vibratory drive system, suitable for a material screening apparatus, includes rotatable drive shafts each having a centre of mass offset from its rotational axis. A respective drive mechanism is coupled to each drive shaft and is controlled by a controller. The controller adjusts the relative rotational speed of the drive shafts to adjust the relative angular position of the respective centre of mass of the drive shafts. This adjustment allows the vibratory characteristics of the drive system to be changed without having to halt the drive system.

A vibratory drive system, suitable for a material screening apparatus, includes rotatable drive shafts each having a centre of mass offset from its rotational axis. A respective drive mechanism is coupled to each drive shaft and is controlled by a controller. The controller adjusts the relative rotational speed of the drive shafts to adjust the relative angular position of the respective centre of mass of the drive shafts. This adjustment allows the vibratory characteristics of the drive system to be changed without having to halt the drive system.