Workplace

This study presents a workplace safety model oriented around the Control of Ultrafine Particles in Working Places to thoroughly address occupational hazards from the combustion and thermal processes of laser operations. 

To address the challenge of toxic metal fume particles and hazardous emissions from laser processes (such as repair, directed components manufacturing, and surface cladding under high temperatures of 1500°C and 2000 W power), the research utilizes a 3D model of an enclosed workspace with a robotic arm to analyze the concentration gradient and prevent health risks like deep-lung deposition and Ni/Cr exposure where the cancer risk exceeds at the source. 

Post-process, the hazardous airborne environment undergoes a detailed particle size distribution analysis (measured by SMPS, APS, and MOUDI devices) and is subsequently managed using a mixing-efficiency modeling formula to calculate and verify the required ventilation times. 

This method not only delivers precise control based on different physical criteria, requiring 13 minutes for number concentration, 10 minutes for mass and surface area concentration but also completes a risk-based safety cycle by achieving a safe status within just 6 minutes, thereby driving effective risk mitigation and environmental protection in industrial workplaces.