Dorr-oliver Incorporated

George A Lawrence

Eugene L Smith, Jr

Roderick R Roy

Andres Paredes

Michael J Prevett

A flotation apparatus for floating minerals from fluid containing minerals in particulate form. The flotation apparatus includes a hydraulic motor directly connected to a drive shaft for driving a rotor located in the flotation cell, the hydraulic motor being powered by a hydraulic power pack having dual gear pumps to circulate hydraulic fluid at pressures of up to 2900 psi to drive the hydraulic motor. The dual gear pumps include a smaller gear pump for developing high pressure at low flow for quick, soft start of the flotation apparatus. Once started, the larger pump automatically takes over to provide high flow at lower pressure to develop rotor speed of approximately 160 RPM.

Direct hydraulic drive for large flotation cells

The invention relates to an improved flotation cell design for the mining industry. The flotation cell includes a cylindrical froth flotation unit and a unique hexagonal overflow froth launder. The unique design optimizes the froth flotation process and allows for the economical utilization of a honeycomb nesting arrangement.

Froth flotation machine

A flotation separation cell is disclosed having a rotor-stator pump assembly wherein a rotor body comprises integrally formed hub, blade and top plate members. These members form a gas chamber in an upper sector of the rotor. The blades are curvilinear and of parabolic or vortex shape. A gas stream which is conveyed to the gas chamber is discharged from the gas chamber in a transverse direction and flows in gas pockets along surfaces of moving blades for dispersion in a slurry.

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Weston, CT, United States of America

George A Lawrence