米糠尘和谷尘通称谷物尘,根据国内有关报道,谷物尘中游离SiO_2的含量一般大于10%,而米糠尘中游离SiO_2的含量一般小于5%。谷尘中既有无机尘,也含有机尘,认为属于混合性粉尘。米糠尘应怎样对待?为了弄清两种粉尘的区别及其对工人呼吸系统疾病的影响,我们对接尘工人进行调查,现报告如下: Rice bran dust and grain dust are commonly called grain dust. According to the domestic reports, the content of free SiO_2 in grain dust is generally more than 10%, while the content of free SiO_2 in rice bran dust is generally less than 5%. Both in the grain dust inorganic dust, but also contains organic dust, that is a mixture of dust. How should rice bran dust be treated? In order to understand the difference between the two kinds of dust and its impact on workers’ respiratory diseases, we conducted a survey on dust-pick workers and report the following: