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US 4,265,739 AGranted
Flotation machines and components thereof
OwnerRobert W. Daltoninventor
Life of this patent
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Abstract
Froth flotation apparatus with mechanical agitation and aeration. Impeliers and diffusers therefor which are more durable and less expensive than the state-of-the-art components.
Claims2
A froth flotation machine of the subaeration type which comprises:
- a tank;
- an impeller rotatably supported in the bottom of said tank;
- and means for rotating said impeller;
- said impeller being fabricated without an internal supporting skeleton component from a non-metallic, abrasion and corrosion resistant, elastomeric material which has the following characteristics:
- ______________________________________ Minimum tensile strength 2000 psi Minimum tear strength 125 PLI Minimum modulus of elasticity at 100% elongation 400 Maximum percent elongation 600 Minimum durometer (Shore A) 40 Abrasion resistance (maximum 1055, Tabor index, H-18 wheel) 100 Maximum percent resilience 50;
- ______________________________________
- said impeller having a hub which is symmetrical with the axis of rotation of the impeller and has its major dimension extending at right angles to said axis, said impeller further including elongated, rectilinear blades integrated at one end only with said hub and extending from said hub along paths parallel to said axis of rotation, and said blades being located at the periphery of the impeller at equidistantly spaced intervals therearound.
4 more elements
Dependencies are inferred from the claim text.