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当采用通风防尘技术措施防止生产中粉尘尚不能奏效,或者条件限制不能采用防护措施时,作业人员佩戴防尘面具是免受粉尘危害的重要措施。防尘面具按其作用原理分为过滤式和隔离式两类。现将主要国产品种简介如下: 一、过滤式防尘面具过滤式防尘面具通过滤料净化含尘空气,供人体呼吸。此类防尘口罩分为自吸过滤式和送风过滤式两种,防尘效果好,重量轻,携带方便。其使用条件要求环境空气中含氧量不低于18％,不含有毒气体。 1.自吸过滤式防尘口罩自吸过滤式防尘口罩是在佩戴者的呼吸
When using ventilation and dust protection measures to prevent the production of dust is not yet effective, or conditions can not be used when the protective measures, the operator wearing a dust mask is an important measure against dust hazards. Dust masks according to their role is divided into two types of filtration and isolation. Now the main domestic varieties are as follows: A filter-type dust mask filter-type dust mask through the filter dust air purification for the human body to breathe. Such dust masks are divided into self-priming filter and air filter two, dust-proof effect, light weight, easy to carry. Its use conditions require the ambient air oxygen content of not less than 18%, non-toxic gases. 1. Self-absorption filter respirator self-absorption filter respirator respirator in the wearer’s breath