Identification of Occupational Hazard Factors in the Production Process According to the production characteristics of the technological transformation project, the main occupational hazards that exist in the technical renovation project are electric welding dust, in view of the raw materials, auxiliary materials and auxiliary products used in the production process, as well as different production characteristics and processes. , manganese and its compounds, copper smoke, arc light, CO, CO2, NO2, O3, lead oxide, high temperature, noise.
Occupational Disease Hazard Factors Testing Results and Evaluation, Noise Measurement Results and Analysis The noise monitoring data on the site is divided into noise at the job site, ambient noise at the production area, and noise at startup of the newly added equipment. The production lines of technological transformation projects are continuous production. The noise generated during the operation of production equipment is basically steady. Therefore, the contact noise intensity and the contact time are recorded in the operating positions and areas of workers of technical upgrading projects, and the contact noise is 8 hours. Equivalent A sound level for evaluation.
When the power is turned on at a single time, the noise is between 7078dB(A) and the noise intensity is low. However, due to the influence of the old factory buildings and old equipment, the noise intensity generated during the mechanical processing (vehicle, drilling, milling, pliers, and grinding) of the original building is relatively high. High, therefore, the noise of the operator's operating position in the technical reform project has increased, but the 8h equivalent acoustic A level does not exceed the national occupational noise occupational exposure limit. The noise in the welding workshop workbench cleaning workers was 103105dB(A) when they were hit, and the 10211dB(A) was the equivalent sound level of the workers in the 8h. This point noise seriously exceeded the national occupational exposure limit. ().
Welding fume detection results and analysis Technical reform project Welding workshop Add 5 sets of automatic welding machines, the dust produced by the welding fumes, if the welding is not good, there may be welders pneumoconiosis. In this welding workshop, a total of 42 welding soot samples were collected. The test results showed that the welding equipment's operating position of the newly-welded welding equipment was 8h in the contact concentration range of 11963114mg/m3, and the highest concentration in the short-term exposure was 313mg/m3, the highest one time. Over-limit multiple is 0.0125 mg/m3, and workers' exposure concentration at 8h does not exceed 5 workplaces. Occupational exposure limits for harmful factors Part 1: Occupational exposure limits for chemical hazards 6GBZ211-2007.
Manganese and its inorganic compounds test results and analysis This time in the welding workshop collected a total of 42 manganese and inorganic compounds sample, the test results show that the new welding equipment, the operating position of each worker manganese and inorganic compounds 8h contact concentration range 010028010443mg/m3 , The concentration of the short-term exposure to the highest one is 010725mg/m3, and the contact concentration of the worker for 8h does not exceed the national 5 occupational exposure limit of harmful factors in the workplace. Part 1: Occupational exposure limits set by the chemical harmful factors 6GBZ211-2007.
Copper-copper test results and analysis This time, a total of 42 copper-copper samples were collected in the welding shop. The test results showed that the 8-hour contact concentration of copper smoke in the newly-added welding equipment was within the range of 00100381mg/m3, and the short-term exposure concentration was the highest. 010079mg/m3, its workers 8h exposure concentration did not exceed the national 5 workplace harmful factors Occupational exposure limits Part 1: Chemical harmful factors 6GBZ211-2007 occupational exposure limits.
Ozone detection results and analysis This time, a total of 42 ozone samples were collected in the welding workshop. The test results showed that the range of ozone detection values ​​for the newly added welding equipment was 01100126 mg/m3, and their detection values ​​did not exceed the national 5 occupational hazards occupation. Limits of exposure - Part 1: Requirements for the maximum allowable ozone concentration of 013 mg/m3 for chemical hazards 6GBZ211-2007. Nitrogen Oxide Test Results and Analysis A total of 42 nitrogen dioxide samples were collected in the welding shop. The test results were not detected. Occupational Hazard Factors Protection Most of the new machine-added equipment (vehicles, mills, files, etc.) have their own enclosed safety guards and cooling spray devices.
Automatic welding dust mask (2 / month), gloves (2 pairs / month), overalls (2 sets / year), noise protection ear plugs (damage is replaced), welding eye protection (damage is replaced), insulated shoes (1 double/year) machine noise car, drill, milling, pliers, flat glasses (1 pair/year), overalls (2 sets/year), noise protection earplugs (damage change) gear quenching equipment, high temperature, carbon dioxide, etc. Heat-treated canvas gloves (1 double/month) and overalls (2 sets/year) Occupational health surveillance This time, there were 53 toxic and hazardous workers exposed to the technical reform project, including 45 males and 8 females who had undergone occupational health examinations. Physical examination results found no occupational disease and occupational contraindications.
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