Success Stories - Mining

Underground Ore Pass!

230 foot level measurement turns out to be a salty snap!.

Level measurement of underground ore passes is important. Ore passes are not only utilized to funnel ore to the shaft skip loading station but also as silos for storing of ore in order to smooth out ore flow in a shaft system. Safety and operational efficiency are also improved as proper ore pass level measurement could prevent overfilling of tipping areas and also damage of the pass or equipment below if a proper low level is not maintained. 

From an instrumentation perspective an ore pass system is an extremely difficult environment to take measurements in. Factors like dust, vapour, interference, bridging, wear and physical installation have to be taken into account.

Couple that with a low material dielectric and you typically have a major reliability problem. By using the innovative radar parabolic focusing technology these applications become easy. The radar signal is focused in a very narrow beam which allows it to be used in these difficult ore pass applications.

Take this Salt Mine application, with a 20'x20' ore pass that is 230' deep. A conveyor belt is continuously loading the ore pass with low dielectric KCL. The ore pass is very dusty while filling. It is critical to be able to measure during the filling cycle. The echo profile clearing shows a large return echo from the Salt rock at 204' while filling.

The Parabolic level transmitter is air purged to keep the dust from building up on the internals and thereby providing 100% reliability.

The key advantages of using parabolic radar for ore pass and rock bins:

  • accurate measurement can be made even while filling
  • can measure in extremely high dusty environments
  • non-contact measurement
  • quick set-up
  • measurements are not affected by changes in moisture or temperature
  • measurement is not affected by background noise
  • narrow beam angle which allows long measuring range in ore pass or rock bins
  • zero maintenance

For further information on the FRM250 Solids Radar, please contact

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