In recent years,Indonesia has sparked a wave of investment in high-pressure acid leaching projects,with multiple projects already in operation or under planning.Projects are generally led by the Chinese background,with mature technology,reliable equipment,low unit investment,fast construction speed,rich operational experience,short ramp up period,large single line production capacity,and a clear trend of equipment localization.The optimization of High-Pressure Acid Leaching(HPAL)technology involves four key points:first,improving the concentration of the original slurry at the bottom flow;second,optimizing the preheating method;third,optimizing the first stage nickel-cobalt precipitation process;and fourth,optimizing the nickel-cobalt precipitation agent.There are five main development directions for high-pressure acid leaching technology,namely comprehensive utilization of tailings,domestic substitution of key equipment,increasing the length of high-pressure vessels,ore blending,and comprehensive recovery and utilization of manganese.Based on the development characteristics of high-pressure acid leaching technology for laterite nickel ore in recent years,this paper analyzes the optimization focus of high-pressure acid leaching technology,points out the development direction of high-pressure acid leaching technology,and provides effective guidance for the planning and operation of new projects.
维普
万方数据