Use of chelating agents for enhancing the settling of slimes

Details Use of chelating agents for enhancing the settling of slimes Use of chelating agents for enhancing the settling of slimes

1976-04-08

1977-09-20

Bascomb, Jr., Wilbur L.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 58, B01D 2101

Patent

active

040495477

ABSTRACT:
The settling of finely-divided solids that are in suspension in an aqueous medium due to the presence of a colloidal argillaceous mineral is enhanced by adding to the suspension a small but effective amount of at least one chelating agent. Effective chelating agents include malic acid, tartaric acid, nitrilotriacetic acid, and N,N,N.sup.1,N.sup.1 -ethylenediaminetetraacetic acid. This invention is especially useful for treating aqueous suspensions of ultrafine clay and other materials resulting from the hydraulic concentration of an ore material, such as phosphate slimes.

REFERENCES:
patent: 2381514 (1945-08-01), Phelps
patent: 2987473 (1961-06-01), Millman et al.
patent: 3401794 (1968-09-01), Farnand et al.
patent: 3696044 (1972-10-01), Rutledge
patent: 3816305 (1974-06-01), Schutte
Bureau of Mines Report of Investigations, "Chemical and Physical Beneficiation of Florida Phosphate Slimes," 1963.

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