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黄金科学技术 ›› 2015, Vol. 23 ›› Issue (1): 85-89.doi: 10.11872/j.issn.1005-2518.2015.01.085

• 冶炼技术与装备研发 • 上一篇    下一篇

难选金矿微波预处理边磨边浸非氰化试验研究

唐立靖1,唐云1,2,3,许正波1   

  1. 1.贵州大学矿业学院,贵州  贵阳   550025;
    2.贵州大学省级非金属矿产资源综合利用重点实验室,贵州  贵阳   550025;
    3.贵州大学省级优势矿产资源高效利用工程实验室,贵州  贵阳   550025
  • 收稿日期:2014-10-27 修回日期:2014-12-02 出版日期:2015-02-28 发布日期:2015-04-07
  • 通讯作者: 唐云(1971-),女,贵州大方人,教授,从事难选矿石的选矿技术及资源综合利用研究工作。64220566q@qq.com
  • 作者简介:唐立靖(1990-),男,安徽蚌埠人,硕士研究生,从事难选矿石的选矿技术及资源综合利用研究工作。tanglijing217@163.com
  • 基金资助:

    十二五科技支撑计划课题“微细浸染型难采选金矿高效开发利用关键技术研究”(编号:2012BAB08B06)资助

Experimental Research on Refractory Gold Ore Pretreated by Grinding and Leaching Simultaneously with Non-cyanide

TANG Lijing1,TANG Yun1,2,3,XU Zhengbo1   

  1. 1.Mining College,Guizhou University,Guiyang    550025,Guizhou,China;
    2.Guizhou University Provincial Level Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources,Guiyang   550025,Guizhou,China;
    3.Guizhou University Provincial Level Engineering Lab of Mineral Resources,Guiyang   550025,Guizhou,China
  • Received:2014-10-27 Revised:2014-12-02 Online:2015-02-28 Published:2015-04-07

摘要:

某难选金矿石化学成分分析结果显示,金品位为3.51×10-6 ,SiO2 含量高达71.88%,有害元素为碳和硫。其中,有机碳含量高达2.51%,严重阻碍了后续浸出过程的进行。XRD和金物相分析可知,矿石中主要矿物为石英、方解石及硫化矿,硫化矿以黄铁矿为主。金主要以微细粒浸染或包裹于石英、硅酸盐、硫化矿及碳酸盐矿物中。针对该难选金矿石的性质,采用非氰化药剂TL直接浸出时,浸出率较低。采用了微波预处理边磨边浸非氰化工艺,研究了微波焙烧时间、微波焙烧温度、浸出剂TL的用量、液固比及磨浸时间对金浸出率的影响。试验结果表明,在微波焙烧温度为650 ℃、微波焙烧时间为45 min的条件下,当非氰化浸出剂用量为6 kg/t、液固比为4∶1、磨浸时间为6 h时,可获得71.64%的金浸出率。

关键词: 难选金矿, 微波预处理, 边磨边浸, 非氰化

Abstract:

The analysis results of ore chemical composition at a certain refractory gold demonstrated that the gold grade was around 3.51×10-6,content of SiO2 was as high as 71.88%,harmful element was mainly with the presentation of organic carbon and sulfur.In addition,the content of organic of carbon even reached up to 2.51%,which hampered the following leaching procedure seriously.After analyzing the XRD and phase of gold,it was found that the ore main minerals were primary composed with quartz,calcite and sulfide ore,while sulfide ore was given priority to with pyrite.According to the characters of refractory gold ore,when employing the cyanide reagent TL to leaching directly,low leaching rate can be obtained.Therefore,we used microwave method for pretreatment with grinding and leaching simultaneously without cyaniding,and paid attention to the microwave roasting time,microwave roasting temperature,the amount of leaching agent TL,liquid-solid ratio,and the impact of mill leaching time on the gold leaching rate.The results showed under the conditions that microwave roasting temperature at 650 ℃,and microwave baking time of 45 min,the gold leaching rate of 71.64% was achieved when a non-cyanide leaching dosage was 6 kg/t,liquid to solid ratio was about 4∶1,and grinding time was 6 h.

Key words: refractory gold ore, microwave pretreatment, grinding and leaching, non-cyanide

中图分类号: 

  • TF831

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