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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Optimization of conditions for the preparation of activated carbon from olive stones for application in gold recovery
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Optimization of conditions for the preparation of activated carbon from olive stones for application in gold recovery

机译：优化橄榄石材制备活性炭的条件，以在金回收中应用

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The purpose of this study is to prepare a new activated carbon from olive stones for use in gold recovery by carbon-in-leach (CIL) and carbon-in-pulp (CIP). The preparation method chosen was physical activation using steam. The effect of four process parameters: the residence time for carbonization, the activation temperature, the residence time for activation, and steam flow, were studied by the mean of response surface method (RSM) in order to optimize the yield, iodine index, and attrition characteristics. These two last responses were used as primary indicators of gold recovery capacity and mechanical strength. The results obtained show that optimal activated carbon can be prepared under the following conditions: a carbonization time of 157 minutes, activation at 921°C for 53 minutes, and a water vapour flow of 0.18 mL/min. This optimum carbon has an iodine value greater than 1100 mg/g and an attrition index in the order of 0.74%. These values reflect the quality of the precursor (olive stones) as a raw material for the development of an effective new activated carbon for the gold mining industry.
机译：本研究的目的是制备来自橄榄石的新活性炭，用于通过碳含碳（CIL）和纸浆（CIP）的金回收。选择的制备方法是使用蒸汽的物理激活。通过响应面法（RSM）的平均值研究了四个工艺参数的碳化，活化温度，激活和蒸汽流动的停留时间和蒸汽流动的停留时间，以优化产量，碘指数和磨损特性。这两个最后一次反应被用作金回收能力和机械强度的主要指标。得到的结果表明，可在以下条件下制备最佳活性炭：157分钟的碳化时间，在921℃下活化53分钟，水蒸气流为0.18ml / min。该最佳碳的碘值大于1100mg / g，耗材指数为0.74％。这些值反映了前体（橄榄石）的质量作为用于开发用于金矿工业有效新的活性炭的原料。

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