Mineral processing screen separator

A screen separator for separating metal absorbent particles from a pulp including an open topped and closed bottom cylindrical screen for axially vertical location, in use, in a tank containing the pulp, said screen being situated in the tank with its open top substantially at the full pulp surface level in the tank, a bladed impeller which is located partially in and out of the screen in the tank with its axis of rotation vertical and its blades in and extending above the full pulp surface level in the tank, a shroud which surrounds and is fixed to the radial outer edges of the impeller blades to extend vertically over a substantial portion of the length of the impeller with the shroud including at least one pulp outlet which, in use, is located above the full pulp surface level in the tank, drive means, a drive shaft connected to the drive means, and means connecting the drive shaft to the impeller with the impeller being adapted to drive pulp in the screen upwardly within the shroud to and from its outlet above the full pulp surface level in the tank when the impeller is rotated in the screen by the drive shaft.

A screen separator for separating metal absorbent particles from a pulp including an open topped and closed bottom cylindrical screen for axially vertical location, in use, in a tank containing pulp with the open top of the screen at or adjacent the full pulp surface level in the tank, an impeller which is located in the screen with its axis of rotation vertical, drive means, a drive shaft connecting the drive means to the impeller with the impeller being adapted to drive pulp in the screen upwardly to a level above the surface level of the full pulp level in the tank when the impeller is rotated in the screen, and in which the impeller is located partially in and out of the pulp in the tank in use and includes a shroud which surrounds the impeller blades over a substantial portion of the length of the impeller with the shroud including at least one pulp outlet which, in use, is located above the full surface level of the pulp in a tank in which the screen separator is to be used, and the shroud is attached to the impeller blades for rotation with the impeller.

A screen separator for separating metal absorbent particles from a pulp including an open topped and closed bottom cylindrical screen for axially vertical location, in use, in a tank containing pulp with the open top of the screen at or adjacent the full pulp surface level in the tank, an impeller which is located in the screen with its axis of rotation vertical, drive means, a drive shaft connecting the drive means to the impeller with the impeller being adapted to drive pulp in the screen upwardly to a level above the surface level of the full pulp level in the tank when the impeller is rotated in the screen, a second impeller which is situated in the screen below the first impeller and which is rotatable with the first impeller to drive pulp in the screen towards the first impeller in use, and a third impeller on the impeller drive shaft below the bottom of the screen for agitating, in use, the pulp in the tank below the screen.

A screen separator for separating metal absorbent particles from a pulp including an open topped and closed bottom cylindrical screen for axially vertical location, in use, in a tank containing pulp with the open top of the screen at or adjacent the full pulp surface level in the tank, an impeller which is located in the screen with its axis of rotation vertical, drive means, a drive shaft connecting the drive means to the impeller with the impeller being adapted to drive pulp in the screen upwardly to a level above the surface level of the full pulp level in the tank when the impeller is rotated in the screen, and in which the impeller is located partially in and out of the pulp in the tank in use and includes a shroud which surrounds the impeller blades over a substantial portion of the length of the impeller with the shroud including at least one pulp outlet which, in use, is located above the full surface level of the pulp in a tank in which the screen separator is to be used, and a moat which surrounds the impeller between its pulp outlets and the pulp surface in the tank in use and a conduit for conveying pulp from the moat to an adjacent tank.