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目的识别分析镁矿开采暨镁质耐火材料制造业的职业病危害因素及其危害程度,为此类项目的职业病防治管理提供科学依据。方法对某镁矿开采暨镁质耐火材料制造业进行了职业卫生学调查、现场职业病危害检测及职业健康检查。结果粉尘、噪声、CO、CO2、高温是其主要职业病危害因素;检测结果:粉尘35.71%时间加权平均浓度、47.4%的超限倍数值检测结果超标;55.16%的接噪工人超标;CO浓度接近限值;309名接害工人中3人诊断为尘肺Ⅰ期,6人诊断为尘肺观察对象,6人高频听力损伤。结论粉尘、噪声超标严重;通风除尘、防噪声设施设计设置不合理,控制效果差;发生了职业病和职业损伤,危害严重;毒物、高温危害也不容忽视;对此提出了防治职业病危害的对策建议。
Objective To identify and analyze the occupational hazards and their harmfulness in the mining of magnesia and magnesia refractory and to provide a scientific basis for the management of occupational diseases in such projects. Methods Occupational hygiene investigation, field occupational disease hazard testing and occupational health examination were conducted on a magnesium mining and magnesia refractory manufacturing industry. Results The results showed that dust, noise, CO, CO2 and high temperature were the main occupational hazards. The test results showed that: 35.71% of the time-weighted average dust concentration, 47.4% exceeded the limit value exceed the standard; 55.16% Three of 309 workers were diagnosed as stage I pneumoconiosis, 6 were diagnosed as pneumoconiosis and 6 were high-frequency hearing loss. Conclusions Dust and noise exceed the standard seriously; ventilation and dust removal and anti-noise facilities design are set unreasonably and the control effect is poor; occupational diseases and occupational injuries occur, the harm is serious; toxic and high temperature hazards also can not be neglected; countermeasures and suggestions on prevention and treatment of occupational hazards are put forward .