Abstract
The Sherritt acid leach process has been used in several locations for the recovery of nickel and copper from high-grade mattes, in order to produce a concentrated platinum group metals residue. Process steps include matte grinding, atmospheric leaching, pressure leaching, residue filtration, selenium removal, copper electrowinning, and nickel sulphate crystallization. Since 1987, computer simulation of the acid leach process has been utilized for process design, operability and control studies, control system testing, and personnel training. Material balances and dynamic simulations were generated on an IBM compatible personal computer, using flowsheet simulation software capable of communicating with other computers. A PC-based process control software package was also used to develop an operator console for the simulator, as a tool for personnel training. This paper presents an overview of the development and application of computer simulation for this process.
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