In the process of industrial production, the solid particles produced, flying in the production environment, the larger particles in a short period of time good to settle on the ground, the smaller particles for a long time suspended in the air. In the air is suspended state of the dust particles, it is called productive dust. Most of the productive dust contains silicon dioxide (silicon), silicon content of 5% or more, the most serious health hazards to workers. Free silica is the main component of quartz, about 95% of minerals and rocks contain quartz, so the exposure to silica dust industry and cause the air containing silica dust is very much, summarized as follows:

1, the mining industry

Metal mines (gold, mace, iron, zinc, antimony ore, etc.) and non-metallic mines (mica, fluorite, cinnamon coal, etc.) in the excavation of the exposure to silica dust in the types of jobs are rock driller, wind driller, skid steer, and so on. The workers who are exposed to silica dust are rock drillers, wind drillers, pick and load workers, artillery workers, pillar workers, mine selectors, and transportation workers.

2, ore and rock processing industry

Exposure to silica dust in the types of work are crusher, miller, sifter, packer, transportation workers.

3, the refractory industry

In the raw materials preparation, molding, roasting and other processes, exposure to silica dust in the types of workers are crusher, powder workers, mixing powder workers, transport workers, silica bricks, magnesium bricks, high alumina bricks, clay bricks, kiln workers.

4, glass manufacturing

In the preparation of raw materials, such as the process of exposure to silica dust of the types of workers are crusher, miller, sifter, batcher, mixer, billet maker, material workers, etc..

Ceramics and enamel industry

In the preparation of raw materials, crushing, processing, grinding and other processes, exposure to silica dust are crushing workers, powder workers, sieving workers, batching workers, mixing workers, billet makers, polishers and so on.

Foundry

The types of work exposed to silica dust are sand miller, sand mixer, casting workers, wheel cleaner, sand box finishing workers, transportation workers and so on.

Other

Tunneling, road building, water conservancy construction, national defense construction, geological exploration and other industries, exposure to silica dust work types are blasting workers, air drilling workers, crushing workers, loading workers, transport workers and so on.

In the high dispersion and high concentration of silica dust environment, if the labor conditions are not good, and no personal protection knowledge, over time, may get silicosis.