The production of ultrafine particles is increasingly important, but requires special attention to mitigate environmental and energy burdens. Among available milling equipment, the air-jet mill (AJM) has major merits. AJM is applied in the pharmaceutical, catalyst, and ceramic industries to produce μm-particles with high specific surface area, high catalytic activity, and effective ad/absorbent properties. A small (D = 0.1 m) and a larger (D = 0.4 m) AJM were investigated with lactose as a model pharmaceutical compound. The particle size distribution (PSD) and the specific surface area (SSA) of the milled product were determined. Milling efficiencies and required energy were modeled by the Rittinger approach. Environmental concerns of dust emissions and associated health hazards were dealt with by applying a sintered metal fibre filtration. The findings provide design recommendations for AJMs in view of sustainable and efficient operation.
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| http://dx.doi.org/10.1016/j.jenvman.2025.124401 | DOI Listing |
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