Automatic leaching system for hydro-metallurgical production of

Details Automatic leaching system for hydro-metallurgical production of Automatic leaching system for hydro-metallurgical production of

1975-06-24

1976-11-23

Tupman, W.

Metallurgical apparatus

With control means responsive to sensed condition

With analyzer or computation means

75101R, 137 93, 266 81, 266 91, 266135, 324 30R, C22B 302

Patent

active

039932931

ABSTRACT:
An automatic leaching system for the hydrometallurgical production of zinc comprising a pH meter and means for detecting the feed rate of calcine. The pH meter is provided with means for automatically washing the electrodes thereof so as to be capable of continuously and automatically detecting the pH value of the slurry obtained by mixing a spent electrolyte with the calcine. The system comprises a feedback control circuit and a feed-forward control circuit in which the flow rate of the spent electrolyte supplied to the system is the manipulated variable, and the pH value of the slurry is the controlled variable. These control circuits are used for the pH control so that the pH value of the slurry can be maintained constant by controlling the flow rate of the spent electrolyte.

REFERENCES:
patent: 3355375 (1967-11-01), Badgley
patent: 3552212 (1971-01-01), Ohlin
patent: 3605775 (1971-09-01), Zaander et al.
patent: 3625850 (1971-12-01), Arrington
patent: 3628555 (1971-12-01), Nagano et al.
patent: 3687828 (1972-08-01), Carpenter et al.
patent: 3779265 (1973-12-01), Hart
patent: 3880653 (1975-04-01), Hougen
patent: 3892652 (1975-07-01), Levine et al.

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