Clay is defined as a natural, earthy, fine-grained material, largely of a group of crystalline hydrous silicate minerals known as clay minerals. Clay minerals are composed mainly of silica, alumina, and water, but they may also contain appreciable quantities of iron, alkalies, and alkaline earths. Clay is formed by the mechanical and chemical breakdown of rocks.

Because of stone crusher is not fully closed, at work, being hit by extrusion, stone, stone clearance of air is extruded and high-speed outward movement, lead dust overflow together, instantly raise large amounts of dust. Dust discharge flow down through the chute (few) or through the feeding mouth upward (most), make the feeding mouth around…