this study surveyed wood dust exposure levels and pulmonary hazards among wood mill workers. dust concentrations as measured by six-stage cascade impactors were high in work areas of grinding and screening. total dust concentrations for these dusty activities ranged from 4.4 to 22.4 mg, and the respirable proportions were between 2.4% and 50.2%.oct 27, 2004 aims: In order to assess possible occupational risk for workers in a grain mill, we evaluated aerial microbiological contamination in different areas of the mill and at different points of the production line. We also measured the concentration of aerodispersed dust particles. methods and results: An assessment of microbiological contamination levels based on a global index of microbial alibaba.com offers 1,566 hammer mill dust collector products. about of these are dust collector. wide variety of hammer mill dust collector options are available to you, such as warranty of core components, local service location, and applicable industries.