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在 70℃ ,2mol/LNaCl溶液中对黄铜矿进行了溶解实验 ,发现在酸性 ( pH =1 .45～2 .45 )和远离Cu饱和浓度条件下 ,黄铜矿的溶解速率随反应时间发生显著的非周期振荡变化 ;而在弱酸性至中性 ( pH =3.6 6～ 7.0 )条件下 ,溶液中Cu浓度随反应时间发生混沌振荡 .在非平衡和开放的条件下 ,由Cl-,H+和O2 所引起的黄铜矿溶解与铜氯络合物形成及赤铁矿沉淀过程间的非线性耦合作用是导致溶解速率振荡变化的内在机制 ;而黄铜矿溶解与氯铜矿沉淀之间的非线性耦合作用则是引起Cu浓度混沌振荡的主要原因 .速率振荡与Cu浓度振荡既有联系 ,又存在一定的差异 ,它们都表明黄铜矿在NaCl溶液中的溶解是一个非线性反应过程
The dissolution experiments of chalcopyrite in 2mol / L NaCl solution at 70 ℃ showed that the dissolution rate of chalcopyrite with reaction time is under the condition of acidity (pH = 1.45 ~ 2.45) and distance from Cu saturation concentration But the change of Cu concentration in solution was chaotic oscillation with the reaction time under the condition of weak acidity to neutrality (pH = 3.6 6 ~ 7.0). Under non-equilibrium and open conditions, And O2 caused by chalcopyrite dissolution and copper chloride complex formation and hematite precipitation process of non-linear coupling between the dissolution rate oscillation mechanism is the internal mechanism; and chalcopyrite dissolution and precipitation of copper and copper between Is the main reason for the chaotic oscillation of Cu concentration.The relationship between the rate oscillation and the Cu concentration oscillation is related to both the existence and the difference.They all indicate that the dissolution of chalcopyrite in NaCl solution is a nonlinear reaction process