Abstract
The production of metal powders results in various dangerous and harmful manufacturing byproducts; the means for their prevention and mitigation of their action are considered in this chapter. Dangerous and harmful agents, including open flames, heat radiation, molten metal, flammable and explosive dusts and gases, dusts and gases which cause harm through inhalation, and eye and skin contact, elevated temperatures in the workplace atmosphere, elevated temperatures of equipment surfaces, noise and vibration, voltage in electric circuits, electrostatic electricity, movable mechanisms, and mobile parts of equipment are considered. Dust explosion protection systems, comprised of dust explosion venting, explosion flameless venting, explosion suppression, and explosion isolation, are described. Localization of powder-gas emission, aspiration in combustible powder conditions, aspiration for particulate material reloading in closed gravity chutes, local exhaust ventilation designs for melt atomization, and grinding units are discussed. Clarification of recirculated water, including mechanical clarification methods, chemical treatment methods, ion exchange, sorption, evaporation, and flotation methods, are described. Dedusting and gas cleaning by local exhaust ventilation systems are described. Waste product utilization, storage, and transportation are considered.
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