Development and Evaluation of a Prototype Instrument for the Measurement of Carbon Concentration in Pulp

摘要

Carbon-in-pulp (CIP) is an important process for the recovery of gold on modern plants. The report describes the development and testing of a prototype system that measures the concentration of carbon in CIP adsorption tanks. This measurement can then be used in the control of the carbon inventory. The instrument consists of a submersible probe coupled to an external electronic circuit and an on-board computer facility. The probe comprises two sections: ultrasound-attenuation transducers, and a density-probe transducer, which measures pulp density by a technique of impedance mismatch. The prototype instrument measures the attenuation of ultrasound in CIP, and this result is used, together with measurements of pulp density and temperature, in an algorithm for the computation of the concentration of carbon.