论文部分内容阅读
某砂轮厂1977年～1979年粉尘浓度较高,为53.5m g/m~3～196mg/m~3,1984年共测样品102个,其中>10mg/m~3占样品总数的62.7％。对粉尘浓度较高的混料、整型两个工段进行全年定点定时测定,月平均粉尘浓度为22.3mg/m~3.两个工段的粉尘分散度为<5μm占66％,5μm占24％。SiO_2含量混料工段为14.9％,整型工段为25.1％(焦磷酸法)。本次调查了三个工
A grinding wheel factory from 1977 to 1979, a higher dust concentration, 53.5m g / m ~ 3 ~ 196mg / m ~ 3, a total of 102 samples in 1984, of which> 10mg / m ~ 3 accounted for 62.7% of the total number of samples. For the mixture with higher dust concentration, the two sections of the integer type were measured at fixed points for the whole year with a monthly mean dust concentration of 22.3mg / m ~ 3. The dust dispersions of the two sections were <5μm accounted for 66% and 5μm accounted for 24 %. SiO 2 content of mixing section is 14.9%, integer section of 25.1% (pyrophosphate method). The survey of three workers