Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1985-05-09
1986-06-03
Nozick, Bernard
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209170, 261123, B03D 102
Patent
active
045928347
ABSTRACT:
The froth flotation device includes a flotation column partially filled with a packing which defines a large number of small flow passages extending in a circuitous pattern between the upper and lower portions of the column. A conditioned aqueous pulp of a mineral ore, such as iron ore, is introduced into the midzone of the column. A pressurized inert gas, such as air, is introduced into the bottom of the column and is forced upwardly through the flow passages in the packing. As the air flows upwardly through these flow passages, it is broken into fine bubbles which intimately contact the floatable particles (e.g., iron oxide) in the aqueous pulp and forms a froth concentrate or float fraction which overflows from the top of the column. Wash water is introduced into the top of the column and flows through the flow passages in the packing countercurrently to the float fraction to scrub entrained non-floatable particles (e.g., gangue) from the froth concentrate. A tailing fraction containing the non-floatable particles is withdrawn from the bottom of the column.
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G. I. Mathieu, "Comparison of Flotation Column with Convention of a Molybdenum Ore" (CIM Bulletin, May, 1972), pp. 41 through 45.
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Board of Control of Michigan Technological University
Nozick Bernard
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