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The effect of heat treatment on chalcopyrite

机译：热处理对黄铜矿的影响

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The influence of conventional heat treatment and microwave radiation on chalcopyrite was investigated. There was a significant increase in the proportion of material recovered to magnetic fraction and magnetic susceptibility with conventional heating time. XRD analysis detected phase changes in conventional heat-treated chalcopyrite, which increases the magnetic susceptibility of the ore and enables its effective magnetic separation, which is impossible to achieve in its original state. With microwave treatment, the magnetic susceptibility increases and the proportion of material recovered to magnetic fraction on the induced rolls is also increased. However, XRD analysis failed to detect any phase changes. A possible explanation for this observed behaviour is that the more magnetic component that has been formed by microwave treatment is below the threshold of detection of the XRD analyser. Taking into account that results from the froth flotation tests indicated that % weight fraction in the concentrate decreases with microwave exposure time, the change might be due to a surface effect.
机译：研究了常规热处理和微波辐射对黄铜矿的影响。与常规加热时间相比，回收的材料占磁性部分的比例和磁化率显着提高。 XRD分析检测到常规热处理黄铜矿中的相变，这会增加矿石的磁化率并实现有效的磁选，这在原始状态下是无法实现的。通过微波处理，磁化率增加，并且在感应辊上回收的材料占磁性部分的比例也增加。但是，XRD分析无法检测到任何相位变化。对于这种观察到的行为的可能解释是，通过微波处理形成的更多的磁性成分低于XRD分析仪的检测阈值。考虑到泡沫浮选试验的结果表明精矿中的重量百分数随微波暴露时间的减少而降低，这种变化可能是由于表面效应所致。

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