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金属矿山 ›› 2018, Vol. 47 ›› Issue (03): 111-115.

• 矿物工程 • 上一篇    下一篇

云南某高砷铜银矿石工艺矿物学研究

陈启良   

  1. 云南省有色地质局地质地球物理化学勘查院,云南 昆明 650216
  • 出版日期:2018-03-15 发布日期:2018-03-20

Research on Process Mineralogy of a High Arsenic Copper Silver Ore from Yunnan Province

Chen Qiliang   

  1. Institute of Geological,Geophysical and Geochemical Exploration,Yunnan Nonferrous Metals Geological Bureau,Kunming 650216,China
  • Online:2018-03-15 Published:2018-03-20

摘要: 云南境内高砷铜(银)矿众多,为给该类型矿石的选冶研究提供参考,对某高砷铜银矿石开展了工艺矿物学研究。结果表明:①矿石构造主要为细脉浸染状、条带状、角砾状等构造;主要结构为他形—半自形—自形粒状、鳞片变晶、碎裂、交代残余等结构。②矿石中的金属矿物主要为黄铜矿、砷铁锑黝铜矿、毒砂、黄铁矿,硫铋铜矿、孔雀石少量,偶见蓝辉铜矿等;非金属矿物主要为石英、白(绢)云母、白云石、方解石、斜长石等。主要有用矿物为黄铜矿,其次为砷铁锑黝铜矿及硫铋铜矿;有害矿物主要为毒砂。③矿石属于高银硫化铜矿石,硫化铜占总铜的97.25%,94.07%的银分布在硫化铜矿物中,在浮铜过程中,银将随铜矿物的回收而得以综合回收。④黄铜矿、砷铁锑黝铜矿的嵌布粒度主要为0.01~0.1 mm,属细粒嵌布,对磨矿细度有一定要求。⑤矿石宜采用抑砷浮铜原则流程进行选矿,对含砷严重超标的铜银精矿宜采用焙烧或焙烧+湿法浸出的工艺进行降砷。

关键词: 高砷铜银矿石, 工艺矿物学, 黄铜矿, 砷铁锑黝铜矿, 毒砂

Abstract: There are a lot of high arsenic copper(silver) deposits in Yunnan province.In order to provide basis for investigating the beneficiation and smelting of this type of ore,the process mineralogy of a high arsenic copper-silver ore was researched.The results showed that:①the ore mainly exists in fine grained disseminated,banded and brecciform structure,and its main texture are allotriomorphic-hypautomorphic-xenomorphic granular,lepidoblastic,cataclastic,and metasomatic relict textures etc..②The main metallic minerals are chalcopyrite,iron antimony tennantite,arsenopyrite,pyrite,wittichenite,less malachite,and occasionally digenite;The non metallic minerals are mainly quartz,muscovite  (sericite ),dolomite,calcite,feldspar etc..The main useful mineral is chalcopyrite,followed by iron antimony tennantite and wittichenite,and the harmful mineral is arsenopyrite.③The ore belongs to high-silver copper sulfide ore.Copper sulfide accounts for 97.25% of total copper,and 94.07% of silver is distributed in copper sulfide minerals.In the process of floating copper,silver will be recovered comprehensively with recovery of copper minerals.④The chalcopyrite and iron antimony tennantite are mainly fine disseminated with dissemination size of ranging from 0.01 to 0.1 mm,so that there are certain requirements for grinding fineness.⑤The ore can be treated by the process of arsenic inhibition and copper flotation.The copper-silver concentrate with high arsenic can be treated by calcination or calcination + wet leaching process to lower arsenic.

Key words: High arsenic copper-silver ore, Process mineralogy, Chalcopyrite, Iron antimony tennantite, Arsenopyrite