Abstract
The occurrence state of the low-grade silver (30.7ppm) In refractory gold-silver ore from Beiya (Yunnan, China) was characterized. A pretreatment process of reductive leaching by cuprous in ammonia-ammonium sulfate alkaline solution was reported in this paper. Cu metal was employed to reduce cupric to cuprous based on the Cu2+ observed in the ore. The effects of the process parameters on the leaching ratio of Mn and Ag were investigated, including the amounts of ammonia and ammonium and the amount of Cu metal, the liquid-solid ratio and the leaching time. The results showed that silver mainly occurred in the manganese ore as isomorphism. The best result of the cyanidation leaching ratio of silver in this work was 78.96% under the conditions of 0.02mol/L NH3·H2O, 1.0mol/L (NH4)2SO4, 4g of Cu wire, a liquid-solid ratio of 3:1 and a stirring speed of 300r/min for 4h. This work developed a comprehensive recovery process for the manganese-silver resource with low-grade silver.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
