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Mechanical Engineering Commons

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Michigan Technological University

1993

Articles 1 - 2 of 2

Full-Text Articles in Mechanical Engineering

Froth Flotation Apparatus, Jiann-Yang Hwang Oct 1993

Froth Flotation Apparatus, Jiann-Yang Hwang

Michigan Tech Patents

The froth flotation apparatus includes a gas bubble-particle contact unit including a mixing structure for breaking a gas into fine bubbles,such as a packed tower packing or mechanical agitator, and a separate phase separation unit. A conditioned aqueous pulp containing a mixture of hydrophobic and hydrophilic particles and a substantially inert gas, such as air, are introduced into and combined in one end of the contact unit and subsequently flow concurrently through the mixing structure, such that the gas is broken into fine bubbles which intimately contact and become attached to the hydro- phobic particles. The resulting gas bubble-particle ...


Wet Process For Fly Ash Beneficiation, Jiann-Yang Hwang Jul 1993

Wet Process For Fly Ash Beneficiation, Jiann-Yang Hwang

Michigan Tech Patents

A wet process for the beneficiation of a fly ash by-product has the following steps: a) forming a slurry mixture of a fly ash material and a liquid; b) gravitationally separating and collecting a first material fraction of the fly ash having a density less than the liquid by skimming off floating slurry material; c) separating a first magnetic fraction from the slurry by subjecting the slurry to a magnetic field of from about 300 gauss to about 10 kilogauss; d) separating the unbumed carbon from the remaining slurry components by adding an effective amount of an oil having a ...