APP下载

云南某铜矿及其伴生银的选矿试验研究

2017-05-11范培强

价值工程 2017年14期

范培强

摘要: 云南某低品位铜矿中含铜0.33%,铜主要呈原生硫化铜态存在,伴生银矿品位为3.71g/t,脉石矿物主要为蛇纹石、滑石等。由于铜及伴生银的品位较低,必须选择适当的流程和药剂,在选别铜的同时也能将银很好地富集起来。通过磨矿细度试验和捕收剂、抑制剂种类等试验的研究,最终采用丁基黄药和Z-200混合(1:1)捕收剂80g/t,2#油30g/t,石灰为300g/t,通过“铜硫混浮-粗精矿再磨浮选”的工艺,获得了铜的品位为16.48%,回收率为82.42%的铜精矿,其中银的含量58.23g/t,回收率为27.12%,选矿指标较好。

Abstract: Copper in low grade copper ore in Yunnan contains copper 0.33%, which is mainly sulfide of copper. The associated silver grade is 3.71g/t and the main gangue mineral is serpentine, talc etc. Due to the low grade of copper and associated silver, it is necessary to choose the proper process and reagent to enrich copper, meanwhile, silver can be also enriched. Through the study of grinding fineness test and collector, the type of inhibitor, it is used to the mixture of Z-200 and butyl xanthate (1:1) collector 80g/t, oil-2# 30g/t, lime 300g/t and technology of copper and sulfur mixed flotation -coarse concentrate regrinding flotation, obtained the grade and recovery of copper concentrate were 16.48% and 82.42%, the content of silver were 58.23g/t and the recovery rate was 27.12%. It is good beneficiation index.

关键词: 铜矿;伴生银;再磨;浮选

Key words: copper;associated silver;regrinding;flotation

中图分类号:P618.41 文献标识码:A 文章编号:1006-4311(2017)14-0162-04

0 引言

铜矿类型主要有斑岩型、砂页岩型、矽卡岩型、脉型等,其中以斑岩型铜矿为主,分别占世界储量的一半以上。铜作为关乎国民生计的重要金属,其用量仅次于钢铁和铝。而我国铜矿主要分布在东部地区的江西、安微、黑龙江,约占全国储量的44%,西部地区的西藏、云南、新疆和内蒙古约占52.8%。并且铜矿的品位低,品位大于1%的铜矿仅占储量的21%。随着铜需求量的不断增加和高品位铜矿的日渐枯竭,对低品位铜矿的开发利用已经成为生产铜的重要途径[1-3]。

此外,在有色金属矿物中回收其中的伴生金银矿是生产金银的一种重要方法。我国有色金属资源丰富,其中伴生金银等贵金属的储量也十分巨大,伴生金银主要赋存在铜矿、镍矿、铅锌矿中[4-5]。为了更好地利用我国储量丰富的有色资源,本文对云南某低品位伴生银的铜矿为研究对象,开展了探索提高铜品位及其伴生银的实验研究。……

登录APP查看全文