摘要
为综合回收云南大理某含金多金属氧化矿石,对其进行工艺矿物学及分选试验研究。结果表明:矿石中金、银、铁的品位分别为1.99 g/t、47.60 g/t和32.98%,是主要有价金属;其中,约87%的金以含银自然金和银金矿独立矿物的形式赋存于褐铁矿中,少量以载体金的形式嵌布于磁铁矿-磁赤铁矿中;约90%的银赋存于硬锰矿和褐铁矿中。采用先弱磁选后强磁选的工艺综合回收有价金属,弱磁选获得了铁品位为61.67%、铁回收率为16.45%的磁铁精矿,强磁选获得了铁品位为42.46%、铁回收率为66.56%的褐铁精矿,金、银回收率分别达到了60.50%和65.84%,金、银、铁均得到了有效的分离富集。
In order to comprehensively recover a gold-bearing polymetallic oxide ore in Dali, Yunnan, the process mineralogy and separation test were carried out.The result shows that the grades of gold, silver and iron in the ore are 1.99 g/t, 47.60 g/t and 32.98 % respectively, which are the main valuable metals.Among them, about 87 % of gold occurs in limonite in the form of silver-bearing native gold and independent minerals of electrum, a small amount of gold is embedded in magnetite-maghemite in the form of carrier gold;and about 90 % of silver occurs in psilomelane and limonite.The valuable metals were comprehensively recovered by low intensity magnetic separation followed by high intensity magnetic separation.The low intensity magnetic separation obtains the magnetite concentrate with the iron grade 61.67 % and the iron recovery 16.45 %.The limonite concentrate with iron grade of 42.46 % and recovery rate of 66.56 % can be obtained by high intensity magnetic separation, and the recovery rates of gold and silver are 60.50 % and 65.84 % respectively.The gold, silver and iron are effectively separated and enriched by this process.
作者
祁磊
高文元
殷燕林
杨啸清
庄世明
和少龙
崔毅琦
Qi Lei;Gao Wenyuan;Yin Yanlin;Yang Xiaoqing;Zhuang Shiming;He Shaolong;Cui Yiqi(Faculty of Land Resource Engineering,Kunming University of Science and Technology;Heqing Beiya Mining Co.,Ltd.)
出处
《黄金》
CAS
2022年第11期67-72,共6页
Gold
关键词
多金属矿
磁选
氧化矿
金
综合回收
polymetallic ore
magnetic separation
oxide ore
gold
comprehensive recovery
