Local ventilation system designed to respirable particles reduce in Abrasive vitrified unit

Background: the importance of clean air is well known in industrial environments. Industries used in numerous Chemicals that many of them are toxic. Proper industrial ventilation can create a sense of calm and comfort for the staff, as a result of which the staff performs well and will have a positive impact on their performance. This study was aimed to determine the concentration of air pollutants in unit abrasive vitrified and local ventilation system design appropriate to reduce the concentration of particles. Methods: This study was cross – sectional that conducted in one metal industry in three phases. First step: Investigate and determine of planning workshops and of pollutants produced location, second stage: sampling and determining the concentrations of contaminants, the third stage: Design of local ventilation system. Results: According to the standard, the occupational exposure limits for chromium and nickel in the workplace are 0.01 and 0.1 mg / m3, respectively. The concentration of chromium and nickel in the plating room was lower than the permissible concentration. while the concentration of particles in the grinding section 1 and 2 over the permissible level and as 11.75 and 13.62 mg / m3, respectively. The local ventilation system was designed according to speed pressure method for grinding unit. Conclusion: Local ventilation system is designed the possibility of particles capture and control to be effective in the machining salon of grinding section.