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[目的 ]评价石材加工行业的防尘措施。 [方法 ]按规定方法调查测定其生产性粉尘和防尘措施。 [结果 ]1作业场所的粉尘浓度为 0 .1～ 2 5 5 .0 mg/m3,粉尘含游离 Si O2 为 2 3.1%～ 48.2 % ,粉尘浓度的达标率为 30 .2 9% ;2采取防尘措施的岗位仅 37.6 9% ,93.5 %防尘措施的防尘效果≤ 6 1.72 % ;3防尘效果依次为日本引进型、有围档型、无围档型 ;4罩口控制风速与防尘效果之间呈正相关。 [结论 ]应提高岗位采取防尘措施的比率和效果 ;提高防尘效果的关键是对防尘措施的合理设计和正确安装 ,并保证足够的吸尘罩口控制风速以及经常性的维护管理
[Objective] To evaluate the dust prevention measures in the stone processing industry. [Method] Investigation and determination of its productive dust and dustproof measures according to the prescribed method. [Result] 1 The dust concentration in the working place was 0.1-2.5 5 .0 mg / m3, the content of free Si O2 in the dust was 21.1% ~ 48.2% and the compliance rate of the dust concentration was 30.29% Dust-proof measures only 37.6 9%, 93.5% dust-proof measures the effect of dust ≤ 6 1.72%; 3 dust-proof effect followed by the Japanese-type, with the surrounding file type, no enclosed file type; Dust prevention effect is positively correlated. [Conclusion] The ratio and effect of taking dust-proof measures should be improved; the key to improve the dust-proofing effect is to reasonably design and correctly install dust-proof measures and to ensure adequate control of wind speed by vacuum hood and regular maintenance and management