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Particle size distribution (Granulometry)

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We deduce that the samples of the three lots of CDBC are not similar. However, each sample has an average diameter (D4, 3) > 1000µm. we note the presence of systematic dust (very penetrating).
Average 2.7% of particles have got an diameter lower to 63 µm (inhalable fraction lower to is about 27mg/g)

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