Abstract
Abstract Portable crushing at Duval Corporation's Sierrita open pit mine has proven both the economics and operability of larqe, hardrock, portable systems. In-house expertise was utilized to create a system incorporating both operational and maintenance features requested by operating personnel. The monitor/control system involves over 400 channels of information and is based on a DEC LSI 11/2 microprocessor communicating with seven microprocessor-based data acquisition systems over a 4-wire, multidrop link. The year and one-half successful operation affirms the design philosophy and the hardware/software implementation
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