粉尘是能较长时间飘浮在空气中的固体微粒。人们把生产过程中产生的粉尘叫做生产性粉尘。生产性粉尘按其性质可分为无机粉尘、有机粉尘及混合粉尘三大类。无机粉尘包括矿物性粉尘、金属性粉尘、人工无机粉尘等,有机粉尘包括动物性粉尘、植物性粉尘、人工有机粉尘等,混合粉尘是上述各类粉尘中两种以上粉尘的混合存在,在生产中最为多见。 Dust is a long time in the air floating in the solid particles. The dust that is produced in the production process is called productive dust. Productive dust according to its nature can be divided into inorganic dust, organic dust and mixed dust three categories. Inorganic dust includes mineral dust, metallic dust, artificial inorganic dust, and the like, and the organic dust includes animal dust, plant dust and artificial organic dust, and the mixed dust is a mixture of two or more kinds of dusts among the above types of dusts. The most common.