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METHOD OF RECOVERING GOLD FROM GOLD ORES CONTAINING PYRITE

机译:从含硫铁矿的金矿石中回收金的方法

摘要

This method for recovering gold from gold ore containing pyrite comprises: a pretreatment step which includes a first step in which gold ore containing pyrite is prepared and a second step in which the gold ore is heated to a temperature of at least 450°C in an inert atmosphere, and the pyrite in the gold ore is pyrolyzed into iron sulfide (II) and elemental sulfur, and which does not contain an oxidizing roasting step; a third step in which gold ore having been subjected to the pretreatment step is brought into contact with gold leaching solution containing chloride ions, bromide ions, and iron ions while being supplied with an oxidizing agent, thereby leaching out the gold component in the ore; a fourth step in which, after adding to the solution obtained by leaching the gold component in step 3, an oxidizing agent is added to adjust the redox potential to at least 520mV, reducing the quantity of monovalent copper ions in the gold leachate; and a fifth step in which the gold in the gold leachate obtained in the fourth step is adsorbed by activated carbon.
机译:从含黄铁矿的金矿石中回收金的方法包括:预处理步骤,该步骤包括第一步,其中制备含黄铁矿的金矿石;第二步,在第二步中将金矿石加热到至少450℃的温度。在惰性气氛下,金矿石中的黄铁矿被热解成硫化铁(II)和元素硫,并且不包含氧化焙烧步骤;第三步骤,将经过预处理的金矿石与含有氯离子,溴离子和铁离子的金浸出溶液接触,同时供给氧化剂,从而浸出矿石中的金成分。第四步,在向步骤3中浸出金组分得到的溶液中加入氧化剂后,将氧化还原电势调节至至少520mV,减少浸出金中一价铜离子的量。第五步骤,在第四步骤中获得的浸出金中的金被活性炭吸附。

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