| 摘要 |
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.
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