1 dust (coal dust)
2
school term
2. 1 Productive dust: solid particles produced in the production process that can be suspended in the air for a long time.
2.2 Workplace: the place where workers often or regularly stay in the process of productive labor.
2.3 Working in contact with productive dust (coal dust): working in productive dust (coal dust) workplaces and engaging in productive labor operations.
2.4 Free silica content in productive dust: the mass percentage of free silica contained in productive dust.
2.5 Total lung ventilation of workers exposed to dust: refers to the total amount of air containing productive dust actually inhaled by workers during the dust exposure time of 1 working day.
2.6 times of the overproof concentration of productive dust: the multiple of the dust concentration in the air of workplace exceeding the allowable concentration of productive dust in workplace.
2.7 Carcinogenicity: Productive dust has carcinogenic characteristics.
2.8 Pneumoconiosis: It is mainly a disease of pulmonary fibrosis caused by inhaling dust in production activities.
2.9 Total dust: dust that can enter the whole respiratory tract.
Hazard degree: Dust (coal dust) can mainly cause occupational respiratory diseases after entering human body, and long-term exposure to high-concentration dust can cause systemic diseases, mainly pulmonary fibrosis-pneumoconiosis, such as pneumoconiosis, respiratory tumors, dust inflammation, etc. Local stimulation of upper respiratory tract mucosa and skin can cause corresponding diseases.
4 Occupational health and hygiene standards
10%≤ free silica content ≤ 50%; 50% & lt； Free silica content ≤80%
Total dust pc-twa (mg/m3) Breathing dust pc-twa (mg/m3)
1 0.7
0.7 0.3
0.5 0.2
5?
Operating rules for post occupational health
5. 1 Dust removal facilities must be in good operation.
5.2 When working in the dust area of the production site, protective articles such as dust masks should be worn.
5.3 Conduct regular inspection on employees working in dust environment.
5.4 In the worker's operation room in the dust workplace, the dust degree is not allowed to exceed the * * hygiene standard.
5.5 Operators must strictly abide by labor discipline, stick to their posts, obey management and correctly wear and use labor protection articles.
5.6 Check the production site regularly, eliminate the phenomenon of running, running, dripping and leaking on site in time, and reduce occupational hazards.
5.7 Check the operation of the equipment on time. Don't disassemble and repair the equipment at will, and find a professional to repair it in time when problems are found.
5.8 The production site must be well ventilated.
5.9 The production site and its auxiliary equipment and pipelines shall always be kept free of water, grease and dust, and shall not run, run, drip or leak, so as to achieve civilized and clean production.
5. 10 post should be watered frequently to reduce dust hazards.
1
noise
2 terminology
2. 1 Productive noise: sound harmful to workers' health and work during production.
2.2
Noisy operation: the operation in which employees are exposed to noise in the workplace.
three
Harmfulness: it brings troubles to people and affects their work, study and rest. Long-term exposure to strong noise can cause hearing loss, neurasthenia syndrome and other diseases.
four
Limit standard of workplace contact noise
Occupational exposure for 8 hours, the allowable standard of workplace noise is 85db(a).
Occupational exposure for 4 hours, the allowable standard of workplace noise is 88db(a).
Occupational exposure for 2 hours, the allowable standard of workplace noise is 9 1db(a).
Occupational exposure is 1 hour, and the allowable standard of workplace noise is 94db(a).
Occupational exposure is 0.5 hours, and the allowable standard of workplace noise is 97db(a).
Occupational exposure is 0.25 hours, and the allowable standard of workplace noise is 100db(a).
The occupational exposure is 0. 125 hours, and the allowable standard of workplace noise is 103db(a).
But * * cannot exceed 1 15.
Decibel (Ampere)
5?
Occupational health operation procedures
5. 1 Operators must strictly abide by labor discipline, stick to their posts, obey management, and wear and use labor protection articles correctly.
5.2 Check the production site regularly, eliminate the phenomenon of running, running, dripping and leaking on site in time, and reduce occupational hazards.
5.3 Check the equipment operation on time, and do not disassemble and repair the equipment at will. Find professional maintenance problems in time.
5.4 The production site and its auxiliary equipment and pipelines shall always be kept free of water, grease and dust, and shall not run, run, drip or leak, so as to achieve civilized and clean production.
5.5 When the noise of each duty room exceeds the standard, appropriate sound insulation measures should be taken.
5.6 Operators shall wear earplugs when entering the noise area of the site.
5.7 In case of continuous operation in noisy areas, it is advisable to rotate the operation in batches.
5.8 Workers who work in noise environment for a long time should have regular physical examination.
5.9 When the noise intensity in the noisy workplace exceeds the hygienic standard, sound insulation and noise elimination measures should be taken, or the time specified in the Hygienic Standard for Noise in Industrial Enterprises (Trial Draft) should be adopted to shorten the contact time of each shift.
5. 10 If the noise intensity in the workplace still exceeds the prescribed hygienic standard after taking noise control measures, individual protection shall be taken; For noisy workplaces where employees do not often stay, sound insulation rooms for control, observation and rest should be established according to different requirements, and there must be enough sound absorption lining in the room to reduce reverberation. ?