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Bench System for Iron Ore Moisture Measurement

Moisture content of materials is a widely used parameter for controlling several industrial processes. Especially in mining, this variable has fundamental importance for transporting and handling stages, which represent the most expensive part of ore treatment. This work presents the development of a bench system for measuring iron ore moisture in real time. The sensor consists of a pair of stainless steel electrodes and, differently to other systems for this purpose, it is based on a modern current-to-voltage method, which presents simple circuit, low-cost, high accuracy, high signal-to-noise ratio, fast response and immunity to stray capacitances.