微细浸染金矿碱性热压预处理-硫代硫酸钠浸金

发布时间：2018-05-23 09:10

  本文选题：微细粒浸染型 + 金矿　； 参考：《矿冶工程》2016年01期

【摘要】：采用碱性热压预处理-硫代硫酸盐浸出含碳质微细粒浸染型极难选原生金矿,分别进行了原矿浸金、热压预处理以及氧化产物浸金试验,考查了各因素对预处理脱碳、脱硫以及浸金效果的影响。试验结果表明,在磨矿细度-0.025 mm粒级占82%,预处理温度160℃、预处理时间2 h、助氧剂TW用量300 g/t、氧压1.6 MPa、p H=12的碱性热压氧化条件下以及硫代硫酸钠用量0.12 mol/L、硫酸铵用量0.075 mol/L、硫酸铜用量0.02 mol/L、p H=9、浸出时间4 h、矿浆液固比3∶1的浸出条件下,获得了金浸出率88.76%。通过对预处理反应热力学计算,以及绘制160℃下Fe-S-H2O体系Eh-p H图,对碱性热压氧化预处理过程的机理进行了初步研究,研究结果与试验结果一致。
[Abstract]:The primary gold ore was extracted by alkaline hot pressing pretreatment and thiosulfate leaching. The primary gold ore was leached with carbonaceous fine particles. The gold leaching test of raw ore, hot pressure pretreatment and oxidation product leaching was carried out, and the decarbonization of the pretreatment was investigated by various factors. Effect of desulphurization and gold leaching. The results show that the grinding fineness of -0.025 mm is 82mm and the pretreatment temperature is 160 鈩，

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