Method for zinc ore extraction

Details Method for zinc ore extraction Method for zinc ore extraction

1978-05-25

1979-10-16

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204296, C25C 116, C25C 704

Patent

active

041712501

ABSTRACT:
A method and apparatus for extraction of zinc ore is disclosed. The zinc ore is mixed with a dilute acid, typically sulfuric acid, in a leaching process and is thereafter filtered through an appropriate number of stages. The filtration removes some of the heavier metals such as lead. Purification removes other elements, typically copper and cadmium. After purification, the filtrate is introduced on the cathode side of a tank having an anode and cathode separated by a permeable diaphragm. The elemental zinc deposits on the cathode while reconstituted acid accumulates on the anode side. The acid is recovered and recycled to the leaching step. The rate of recovery of zinc at the cathode is substantial.

REFERENCES:
patent: 1303226 (1919-05-01), Allen
patent: 3103474 (1963-09-01), Juda
patent: 3679538 (1972-07-01), Druin et al.
patent: 3694281 (1972-09-01), Le Duc
Ind. Eng. Chem., Prod. Res. Develop., vol. 13, No. 1, 1974, pp. 2-9.
Celgard Microporous Polypropylene Film, Technical Bulletins, issued by Celanese Corporation.

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