张伟晓,闾娟沙,张济文.国外某含砷难处理金矿提金工艺试验[J].有色金属(冶炼部分),2019(4):56-59.
国外某含砷难处理金矿提金工艺试验
Technological Test on Abroad Arsenic Bearing Refractory Gold Mine
投稿时间:2018-12-06  修订日期:2018-12-13
DOI:doi:10.3969/j.issn.1007-7545.2019.04.013
中文关键词:  含砷金矿  预处理  酸性热压氧化  浸出率
英文关键词:arsenic-bearing gold ore  pretreatment  acidic hot-pressure oxidation  leaching rate
基金项目:
        
作者单位
张伟晓 灵宝灵金科技有限公司,472500
闾娟沙 灵宝灵金科技有限公司,472500
张济文 灵宝灵金科技有限公司,472500
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中文摘要:
      国外某选矿厂浮选所得金精矿,其中杂质元素砷、硫、铁主要以毒砂和黄铁矿的形式存在于金精矿中,多数金被包裹在硫化物中。该金精矿直接氰化浸出金浸出率仅有70.89%。对比通过碱浸、细磨和热压氧化三种不同的预处理方式后金的浸出率,最终选定酸性热压氧化浸出。在氧化矿浆浓度20%、氧分压0.7 MPa、搅拌速度600 r/min、温度160 ℃、氧化反应3 h的预处理后进行氰化浸出,金浸出率达到97.49%。
英文摘要:
      Gold concentrates obtained by flotation from a foreign concentrator, in which the impurity elements arsenic, sulfur and iron were mainly present in form of arsenopyrite and pyrite, and most of gold was encapsulated in sulfide. Gold direct cyanide leaching rate was only 70.89%. Acidic hot-pressure oxidative leaching was selected after comparing gold leaching rates of three different pretreatment methods, i.e, alkali leaching, fine grinding and hot-pressing oxidation. Gold cyanidation leaching rate is 97.49% after pretreatment under the optimum conditions including oxidation pulp concentration of 20%, oxygen partial pressure of 0.7 MPa, stirring speed of 600 r/ min, temperature of 160 ℃, and oxidation time of 3 h.
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