Process and apparatus for recovering metal from soil

Classifying – separating – and assorting solids – Precedent preparation of items or materials to facilitate... – Sorting special items or sorting by methods and apparatus...

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209 10, 209161, 209211, 209 24, B03B 566

Patent

active

040394336

ABSTRACT:
Metal contained within soil is separated therefrom by introducing the soil into a tank containing water which is quite turbulent, the turbulence being generated by the fact that the water is introduced into the tank in a swirl and also directly upwardly through the center of the swirl. Vibrator units on the sidewalls of the tank further add to the turbulence. Upon being introduced into the turbulent water, the soil quickly turns to mud which goes into suspension and the suspension so formed is buoyed upwardly by the incoming clean water which rises through the tank. The suspension overflows the tank and is directed to a settling basin where the mud is allowed to settle out. The clean water which remains is recirculated through the tank. The metal, on the other hand, being considerably heavier than the mud, passes downwardly through the tank where it is thoroughly washed by the incoming water. The washed metal passes out of the bottom of the tank and is elevated upwardly by a screw-type conveyor.

REFERENCES:
patent: 806414 (1905-12-01), Krause
patent: 1456563 (1923-05-01), Noriega
patent: 2207218 (1940-07-01), Forman
patent: 2417660 (1947-03-01), Remick
patent: 3024909 (1962-03-01), Dahlstrom
patent: 3035697 (1962-05-01), Koch

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