选矿
金矿石
化学吸附
吸附
材料科学
化学
冶金
化学工程
有机化学
工程类
作者
Xuebin Zhang,Youjun Tao
标识
DOI:10.1080/02726351.2023.2225446
摘要
High-efficiency beneficiation of low-grade gold ore becomes an inevitable trend with the depletion of high-grade gold ore. The work innovatively proposed a novel beneficiation process for a typical low-grade gold ore through developing compound collector and discussed the adsorption mechanism. PAX and ADD are most suitable compound collector when the ratio is 3:1 and dosage is 100 g/t. A concentrate with gold grade of 18.40 g/t and recovery of 79.72% is obtained by the novel "one-stage rougher, three-stage cleaner, and two-stage scavenger" closed-circuit process, which has the advantages of low-cost, simple-process, and high-efficiency comparing with the conventional process. The FTIR spectra analysis shows that PAX is a saturated organic compound containing branched chains and ADD is a straight-chain organic compound containing unsaturated bonds. The adsorption of PAX or ADD on the gold ore is chemisorption process and the compound collector has a strong chemisorption capacity. The novel closed-circuit flotation process using compound collector develops an excellent beneficiation effect and provides a prospective and effective approach to concentrate low-grade gold ore.
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