为了解磷灰石在不同工艺生产中职业危害的特点,做好健康监护,降低职业病发病率,我们对生产工艺不同的古港、永和磷肥厂进行了调查,现报告如下。 (一) 调查内容与方法 (1)劳动卫生学:粉尘浓度测定采用滤膜重量法,分散度用滤膜溶解法,游离SiO_2分析采用焦磷酸法,氟化物测定采用超细玻璃纤维滤膜,分析氟离子 In order to understand the characteristics of apatite in different process of occupational hazards, to do a good job of health monitoring and reduce the incidence of occupational diseases, we conducted a survey on the different production processes of the ancient harbor, Yonghe phosphate fertilizer plant, are as follows. (1) Investigation contents and methods (1) Labor hygiene: The determination of dust concentration was carried out by using the membrane weight method and the dispersion method by the membrane dissolution method. The free SiO_2 was analyzed by the pyrophosphate method, the fluoride was measured by the ultrafine glass fiber filter, Analysis of fluoride