报道：为了掌握水泥行业职业危害情况,我们于1991年8～10月对全区县以上18个水泥厂进行了劳动卫生学调查。结果表明:水泥行业粉尘、噪声危害严重。粉尘浓度测定110个样品,浓度范围为1.10～609.87mg/m~3,平均77.23mg/m~3,平均超标7.8倍,点合格率仅为13.64％;游离SiO_2含量分析,生料尘分析48个样品,游离SiO_2含量为0.68～15.67％,平均6.83％;熟料尘分析47个样品,游离SiO_2含量为0.19～9.84％,平均3.24％,生、熟料尘中游离SiO_2含量比较,二者有显著差异(P<0.05);分析62个样品的分散度;其均数构成比为:<2μm者占1.66％、2～5μm者占39.68％、 Report: In order to grasp the occupational hazards in the cement industry, we conducted a survey of labor hygiene in 18 cement factories above the county level from August to October 1991. The results show that: the cement industry dust, noise serious harm. 110 samples with the concentration range of 1.10 ~ 609.87mg / m ~ 3 and an average of 77.23mg / m ~ 3 with an average of 7.8 times exceed the standard of 13.64%. The content of free SiO_2, The free SiO_2 content was 0.68 ~ 15.67% with an average of 6.83%. 47 clinker dust samples were analyzed with free SiO_2 content of 0.19 ~ 9.84%, an average of 3.24%, comparing the free SiO_2 content in raw and clinker dust, (P <0.05). The dispersion of 62 samples was analyzed. The average ratio of the two samples was: 1.66% for <2μm, 39.68% for 2-5μm,