选冶联合工艺预富集阳极泥中稀贵元素的试验研究

发布时间：2019-05-31 15:31

【摘要】：铜阳极泥是铜阳极板电解过程中产生的副产品,含有金、银、铂、钯等稀贵元素。目前,铜陵有色所采用的卡尔多炉火法工艺能实现对阳极泥中稀贵元素的综合回收,但该工艺存在处理能力低,生产成本高等缺点。若在阳极泥进入卡尔多炉前,采用选冶联合工艺对阳极泥中的稀贵元素进行富集,预富集后精矿再进入卡尔多炉处理,则可以降低阳极泥处理成本,实现企业经济效益最大化。试验在酸性矿浆条件下,以铁粉作为还原剂,通过擦洗反应把阳极泥中金、银的氯化物还原成单质,然后以六偏磷酸钠作为调整剂,以丁基黄药+丁基铵黑药作为捕收剂对金、银等稀贵元素进行浮选预富集,取得了满意的选别指标。最终精矿中金、银、铂、钯、硒品位分别为6 525.2 g/t、29.4%、70.1 g/t、145.9 g/t和18.54%,回收率分别为98.59%、99.01%、93.70%、94.61%和96.60%。
[Abstract]:Copper anode mud is a by-product produced in the process of copper anode plate electrolysis, which contains gold, silver, platinum, palladium and other precious elements. At present, the Cardor furnace fire process adopted by Tongling Colored can realize the comprehensive recovery of rare and precious elements from anode mud, but the process has the disadvantages of low treatment ability and high production cost. If the rare and precious elements in anode mud are enriched by combined separation and metallurgy process before the anode mud enters Caldo furnace, and the concentrate is pre-enriched and then treated in Caldo furnace, the cost of anode mud treatment can be reduced and the economic benefit of the enterprise can be maximized. Under the condition of acid pulp, the chloride of gold and silver in anode mud was reduced to simple substance by scrubbing reaction with iron powder as reducing agent, and then sodium hexametaphosphate was used as regulator and butylxanthate butylammonium black agent as collector for gold. Silver and other precious elements were preenriched by flotation and satisfactory separation indexes were obtained. The grade of gold, silver, platinum, palladium and selenium in the final concentrate is 6 525.2 g / t, 29.4%, 70.1 g / t, 145.9 g / t and 18.54%, respectively. The recovery is 98.59%, 99.01% and 93.70%, respectively. 9461% and 96.60%.
【作者单位】：铜陵有色技术中心;
【分类号】：TD95

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