Useful silicon carbide dust

Silicon carbide manufacturing process produces dust in many operating points. The largest operating point of dust is the smelting dry process, grading. The particle size of the dust suspended in the air of the pelleting workshop is roughly as follows: particles below 5μm account for 66.6~92.5%, and particles above 10μm account for 4.8%~22%. The sic in the dust accounts for more than 95%, and the sio2 content is 0.35%~3.58%. The silicon carbide workshop was reformed. The closed dust removal method is adopted in the coke processing and granulation process, and the wet material operation method is adopted in the furnace loading process, and the excellent payment effect is obtained

Silicon carbide dust conforms to the "other dust" condition in tj36-79, that is, the free silica content is less than 10%, so the concentration standard can be set at 10mg/m³. The maximum allowable concentration of productive dust in the air of the workshop (tj36-79) The maximum allowable concentration of harmful substances (mg/m³), dust containing more than 10% free silica (quartz, quartzite, etc.)① 2.0, stone dust and dust containing more than 10% asbestos 2.0, talc dust containing less than 10% free silica 4.0, Glass wool and slag wool dust 5.0, cement dust 6.0 containing less than 10% free silica, tobacco and tea dust 3.0, coal dust containing less than 10% free silica 10, other dust ②10, aluminum, alumina, aluminum alloy dust 4.0, productive dust with more than 80% free silica, should not exceed 1mg/m³. Other dust refers to the free silica content of less than 10%, does not contain toxic mineral and animal and plant dust.