Impeller, a diffuser and an arrangement using such impeller and diffuser in a flotation tank
AssigneeMetso Outotec Finland Oy
InventorsJames Humphris, Björn Nilsson, Max H. Howie
Life of this patent
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Abstract
An impeller and a diffusor is provided which are configured to be used in a flotation tank to enhance mixing of gas and slurry. The impeller comprises two opposing inlet ends and the diffusor comprises two opposing inlet mouths. The impeller is configured, when arranged inside the diffusor, to pump a bi-directional axial flow of slurry into the diffusor. Further, an arrangement using such diffusor and impeller for the use in a flotation tank to enhance mixing of gas and slurry is provided.
Claims20
An impeller for mixing a gas and a slurry in a flotation tank, the impeller comprising:
- a first section having a first inlet end and a first outlet end interconnected by a first envelope surface;
- a second section having a second inlet end and a second outlet end interconnected by a second envelope surface;
- and
- a middle section having a first end and a second end;
- the first and second ends being interconnected by a side wall extending along a rotation axis of the impeller;
- wherein
- the first outlet end of the first section is connected to the first end of the middle section, and the second outlet end of the second section is connected to the second end of the middle section;
- and wherein
- the side wall of the middle section comprises at least one gas outlet configured to communicate with a gas supply.
A diffusor for mixing a gas and a slurry in a flotation tank, the diffusor comprising:
- a first annular section;
- a second annular section;
- and
- a middle section comprising a plurality diffusor blades extending along a longitudinal center line of the diffusor, and wherein the first annular section and the second annular section are connected on opposite sides of the middle section as seen along the longitudinal center line of the diffusor;
- wherein
- the first annular section comprises a funnel shaped inlet end forming a first inlet mouth of the diffusor;
- and
- the second annular section comprises a funnel shaped inlet end forming a second inlet mouth of the diffusor.
Dependencies are inferred from the claim text.