Moisture Content in Gold Ore


In the mineral industry, moisture measurement is very important during mineral processing from mining to the product. MoistTech has thousands of installations worldwide in mineral applications and offer both online for the continuous readings of NIR moisture measurement and laboratory NIR moisture sensors for spot tests near lines or in your quality control labs.

Ore moisture measurement and moisture measurement in other mined minerals can be key to product control and preparation for further processing. Minerals processes such as copper require moisture measurements at various stages such as:

  • Pre-leaching
  • After leach
  • At the exit of the filters
  • Before the furnaces
  • Prior to loading the vessels

Moisture measurement is critical in all aspects of the mining process. As a result, mining companies are constantly adjusting moisture to maintain the quality of their product. Advances in real-time sensing, data collection, and data analysis and interpretation helps to determine the characteristics of the materials prior to processing providing process efficiency and optimization. Regular measurements of moisture in minerals remain a necessity for control of drying, thereby reducing treatment costs. Additionally, small variations and excess moisture in mixes can result clumping affecting quality and consistencies.

Too dry of a product can result in excess dust. Measuring moisture prior to crushing can control particle size and provide dust suppression. During the drying stage, in-process measurements ensure optimization and elimination of over drying, which can lead to product that is out of specification, degradation and an excess of dust. Our sensor calibrations, measurement wavelengths, algorithms and sensor optical requirements are pre-set at the factory; our moisture analysis involving dried minerals, accuracies can be expected to be +/-0.1%. The outputs can be adjusted to optimize PLC or recording requirements.

We recommend installing sensor(s) in several locations though out the process. A sensor should be installed over the conveyor before the final crusher to enable elimination of impurities, as well as at the exit of the final crusher or dryer, to prevent over drying and dust. The sensor should be installed several inches above the conveyor belt or screw conveyor so that it can continuously monitor the process and can control the moisture content either manually or automatically in the finished product.


For additional information or to discuss your application, please contact our headquarters. [email protected] or 941.727.1800