WEIGHING AND SAMPLING
Huge installations are geared to fast, efficient and representative sampling
- Weighing:
- Net weight is determined at the very first stage, prior to any handling of the material, to rule out any possible losses.
- We can handle: drums, big bags, flow bins (returnable).
- Sampling:
Depending on the physical aspect (free-flowing or not) 2 major procedures can be applied: blending or mixing. A thorough 100 % sampling procedure guarantees maximum representativeness of the retained sample.
- Free-flowing material: 2 consecutive blendings combined with rotary samplers in order to reduce material volume.
- Wet material: 100 % mixing followed by spear sampling.
- Primary sample is divided :
- ground samples are put in sealed bags and sent to different parties for assay.
- sample for LOI measurement.
- LOI determination:
- Loss on ignition = calcining loss due to presence of (in)organic compounds (Hydrocarbons, Cl, H2O, Br, other volatile elements)
- Importance: Some of these elements lead to weight variations, and need to be eliminated for correct calculation of the precious metal content.
- Our sampling system does not require any pre-treatment => No risk for metal losses
- We welcome the presence of a customer's representative or independent witness during the entire weighing & sampling operations.
