Study on the Effect of Ore Particle Size on the Leaching Rate of Cyanide Leaching Gold
In order to optimize the process parameters of cyanide leaching of gold,the leaching test and kinetic analysis are carried out in view of the influence of ore particle size on gold leaching process.The results show that the decrease of ore particle size can significantly improve the gold leaching rate and accel-erate the leaching rate.The shrinking core model can well describe the leaching process of gold under differ-ent particle sizes.The decrease of ore particle size can significantly increase the specific surface area and re-duce the mass transfer resistance.Considering the gold leaching efficiency and energy consumption,the par-ticle size range of 0.074-0.250 mm is determined to be the best particle size range,and its energy consump-tion efficiency is the highest,reaching 1.21%/[(kW·h/t)].This study provides an important basis for the opti-mization of gold leaching process parameters by cyanidation,and is of great significance to the sustainable development of cyanidation process.
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