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Basic engineering for the sampling system contains consultation and design of the primary sampling system and general analyzer layout using information from a site visit or client's up-to-date drawings. There is a wide variety of proven Outotec primary samplers for all typical situations.
Homogeneity and mixing of process flows
All material in a process flow must have the same probability of entering the sample. Turbulent flows are required in typical process streams to maintain the slurry in suspension (speed >1.5 m/s). Turbulence keeps the slurry well mixed in contrast to dry solids on a conveyer belt. The finer and lighter the solids in the slurry, the more ideal is the mixing. Gravity begins to play a significant role when particles are above 100 μm in size and/or are of high SG material. Mixing is still very effective in the horizontal direction. Such mixing enables the use of samplers with a simple robust fixed cutter to acquire a representative sample. |
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Sampling for on-line analysis
An acquired sample must be representative of the characteristic of the process stream being measured. Therefore, broad-range particle size analysis requires a representative sample in respect to the particle size, while elemental analysis has to be representative in respect to the measured elemental composition. In vertical pressure pipes, a round nozzle in the middle of the pipe can be used to extract a sample, the flow being thoroughly mixed after a pump or a suitable length of vertical pipe (i.e. longer than 10 x pipe's diameter). In horizontal gravity pipes or launders, vertical cutters are used to take an equal slice of all horizontal layers, which might have different contents due to segregation by gravity.
 On-line elemental analysis
Particle size analysis
Grinding control solutions
Flotation control solutions
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For further information, please contact  automation(at)outotec.com
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