粉尘性质--qsf999的安全生产小屋

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粉尘性质 | 2011-9-23 16:31:00

粉尘性质

    （1）粉尘中游离二氧化硅的含量。粉尘中游离二氧化硅的含量是危害人体的决定因素，含量越高，危害越大。游离二氧化硅是引起矽肺病的主要因素。
    （2）粉尘的粒度。粉尘粒度是指粉尘颗粒大小的尺度。一般来说，尘粒越小，对人的危害越大。
    （3）粉尘的分散度。粉尘的分散度是指粉尘整体组成中各种粒级的尘粒所占的百分比。粉尘组成中，小于5um的尘粒所占的百分数越大，对人的危害越大。
    （4）粉尘的浓度。粉尘的浓度是指单位体积空气中所含浮尘的数量。粉尘浓度越高，对人体危害越大。
    （5）粉尘的吸附性。粉尘的吸附能力与粉尘颗粒的表面积有密切关系，分散度越大，表面积也越大，其吸附能力也增强。主要指标有吸湿性、吸毒性。
    （6）粉尘的荷电性。粉尘粒子可以带有电荷，其来源是煤岩在粉碎中因摩擦而带电，或与空气中的离子碰撞而带电，尘粒的电荷量取决于尘粒的大小并与温湿度有关，温度升高时荷电量增多，湿度增高时荷电量降低。
    （7）煤尘的燃烧和爆炸性。煤尘在空气中达到一定的浓度时，在外界明火的引燃下能发生燃烧和爆炸。

By:qsf999 | 阅读全文 | 回复(15) | 引用通告 | 编辑

Re:在漫画中识别身边的违章 | 2017-2-18 0:24:57

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Re:在漫画中识别身边的违章 | 2016-10-22 20:20:54

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Re:在漫画中识别身边的违章 | 2016-10-22 3:28:34

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Re:在漫画中识别身边的违章 | 2016-10-19 2:40:16

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Re:在漫画中识别身边的违章 | 2016-10-17 1:42:31

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Re:在漫画中识别身边的违章 | 2016-10-16 13:42:56

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Re:在漫画中识别身边的违章 | 2016-10-14 20:58:12

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Re:在漫画中识别身边的违章 | 2016-10-13 21:01:28

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Re:在漫画中识别身边的违章 | 2016-10-11 20:55:28

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原创 | 2016-9-28 21:19:00

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