| 微细浸染型难选冶金矿石
碱性热压预氧化试验研究 |
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| 引用本文： | 林志坚.微细浸染型难选冶金矿石
碱性热压预氧化试验研究[J].矿产综合利用,2012(3):34-37. |
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| 作者姓名： | 林志坚 |
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| 作者单位： | 珲春紫金矿业有限公司,吉林珲春,133300 |
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| 摘 要： | 贵州某金矿中金主要以包裹形式存在,矿石中载金矿物主要是黄铁矿和毒砂、少量是硅酸盐矿物和碳酸盐矿物。载金矿物很细大多在1～5μm之间,呈超显微状态存在,属含硫砷微细浸染型难选冶金矿。回收该金矿石中金需在碱性介质中进行氧化预处理,使硫化矿物中的硫、砷、锑、铁分别被氧化成硫酸盐、砷酸盐、锑酸盐及赤铁矿,最终导致硫化物晶体的破坏,使其被包裹的金暴露出来,得以用氰化法回收。通过对影响浸出的几个因素:矿石粒度、碱用量、浸出温度、矿浆浓度、氧分压、浸出时间、SAA用量等进行了试验研究,择取优化条件,金的浸出率可达到90.1%。
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| 关 键 词： | 难选冶金矿石 热压预氧化 氰化浸金 |
Study on alkaline hot-pressure pre-oxidation for a fine disseminated type refractory gold ore |
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| Lin Zhi-jian.Study on alkaline hot-pressure pre-oxidation for a fine disseminated type refractory gold ore[J].Multipurpose Utilization of Mineral Resources,2012(3):34-37. |
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| Authors: | Lin Zhi-jian |
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| Affiliation: | LIN Zhi-jian(Hunchun Zijin Mining Industry Co.,Ltd.,Hunchun,Jilin,China) |
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| Abstract: | The gold in an ore in Guizhou mainly exits in the form of parcel.The main gold-bearing minerals are pyrite,arsenopyrite,silicate and carbonate,the particle size of which is 1~5μm,existing in the state of ultramicroscopic and belonging to a fine disseminated type refractory gold ore containing sulfur and arsenic.To recover the gold in the ore,the oxidation pretreatment must be carried on in the alkaline medium to make sulfur,arsenic,antimony and iron oxidized into sulfate,arsenate,antimonite and hematite,finally leading to the damage of sulfide crystal so that the parceled gold is exposed and at last he cyanidation was used to recover.Experiment research was carried on through such factors affecting leaching as ore particle,alkaline dosage,leaching temperature,pulp density,oxygen partial pressure.leaching time and SAA dosage to select optimum condition.Finally,the leaching rate of gold reached 90.1%. |
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| Keywords: | Refractory gold ore Hot-pressure pre-oxidation Cyanide leaching of gold |
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