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研究了在球磨机和振动磨机中磨矿时,含金废弃活性炭在热氧化行为和其他性质上的变化。发现经振动磨机研磨的废活性炭由于表面积和机械-化学活性的增加,其氧化温度发生了大的变化。机械-化学作用导致了废活炭晶体结构的变化。结果发现,经振动磨矿的试样在450℃时即被完全氧化。研究确认振动磨矿是降低废活性炭氧化温度的较好方法。此外,发现金富集在灰渣中。金品位2kg/t时用氰化物浸出20小时后,振动磨矿试样金回收率为99.5%,球磨试样则仅为82%。球磨试样回收率低的原因是由于灰渣的烧结,这是由较高的氧化温度所造成的。
The changes in the thermal oxidation behavior and other properties of gold-containing waste activated carbon during grinding in ball mills and vibration mills were investigated. It has been found that the spent activated carbon ground by a vibrating mill undergoes a large change in its oxidation temperature due to its increased surface area and mechanical-chemical activity. Mechanical-chemical reactions lead to changes in the crystal structure of waste activated carbon. As a result, it was found that the sample ground by vibration was completely oxidized at 450 ° C. The study confirmed that vibration grinding is a better method to reduce the oxidation temperature of waste activated carbon. In addition, it is found that gold is enriched in ash. Gold leaching 2kg / t with cyanide leaching for 20 hours, the vibrating grinding sample gold recovery was 99.5%, ball milling sample was only 82%. The reason for low ball mill sample recovery is due to the sintering of the ash, which is caused by the higher oxidation temperature.