Oxygen pressure leaching method for nickel sulfide concentrate
The invention discloses an oxygen pressure leaching method for nickel sulfide concentrate. The method comprises the following steps of adding water into the nickel sulfide concentrate, and finely grinding to obtain ore pulp; mixing the ore pulp with two-stage oxygen pressure leaching liquid, control...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses an oxygen pressure leaching method for nickel sulfide concentrate. The method comprises the following steps of adding water into the nickel sulfide concentrate, and finely grinding to obtain ore pulp; mixing the ore pulp with two-stage oxygen pressure leaching liquid, controlling the liquid-solid ratio to be (2-3): 1 and the initial acid concentration to be 40-50g/L, performing first-stage oxygen pressure leaching in a first high-pressure kettle, and performing solid-liquid separation to obtain first-stage oxygen pressure leaching liquid and first-stage oxygen pressure leaching residues; feeding the first-stage oxygen pressure leaching liquid into a second high-pressure kettle, adding a sulfuric acid solution, controlling a liquid-solid ratio to be (2-3): 1, and the initial acid concentration to be 90-100 g/L, introducing oxygen, performing second-stage oxygen pressure leaching, then performing solid-liquid separation, and obtaining second-stage oxygen pressure leaching liquid and seco |
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