DETERMINATION OF PARTICLE SIZE/ FeMn slag (Ferro-manganese slag)/ OECD 110 / GLP

Particle Size Distribution. Particle size data have been acquired using a procedure designed to comply with the European Commission technical guidance document 'Particle Size Distribution, Fibre Length and Diameter Distribution' (June 1996), which satisfies the requirements of OECD Guideline 110. On visual assessment, the test material was observed to be composed of rocks of various sizes from approximately 10 cm to <1 cm plus some dust. To represent a worst-case scenario for potential inhalation risk, the larger particles were removed and only the smaller particles and dust were sub-sampled. From this subsample, the percentage of test material with a particle size less than 100 µm was determined to be 3.3% by sieve analysis. This indicated that the test material was of a particle size that was essentially non-inhalable. It must be noted that this value is a significant overestimate of the true fine particle fraction of the test material due to the sampling procedure.

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