Aichun Dou
This study investigates the pressure oxidation leaching of gold-antimony (Au-Sb) alloy with a focus on removing impurities such as copper (Cu) and nickel (Ni) from the alloy, which contains less than 25% (wt. %) of these metals. The research employs pressure oxidation leaching in a sulphuric acid system (POLS), followed by hydrochloric acid leaching (HAL), to enhance the leaching ratios of different metals. A series of experiments were conducted to evaluate the effects of various parameters in the POLS process. The optimal conditions were identified as 1.5 mol/L concentration of H2SO4, a liquid-solid ratio of 7:1, an oxidizer amount of 1.2 times the theoretical requirements, a leaching time of 4 hours, and a temperature of 427K. Under these conditions, leaching ratios for copper and nickel achieved 99%, with antimony, lead, and silver remaining undissolved in the sulphuric solution. The residual from POLS was subsequently treated with hydrochloric acid, resulting in over 92% leaching of antimony and enriching the gold grade in the final residue to 66%. This novel approach presents an effective method for processing Au-Sb alloys with high impurity levels.
@article{7583dd7b-8989-4f6c-9c72-ab1d97c16ee0,
title={PRESSURE OXIDATION LEACHING OF GOLD-ANTIMONY ALLOY},
author={Aichun Dou},
year={2016},
language={en}
}TY - JOUR TI - PRESSURE OXIDATION LEACHING OF GOLD-ANTIMONY ALLOY AU - Aichun Dou PY - 2016 LA - en ER -
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