Processing by=product silica dust to improve physical properties - involves treatment in ball-, drum-, or rod mill, pref. at preset energy level

摘要

Silica dust, esp. dust obtd. from electric melting furnaces used to mfr. metallic Si or its alloys is treated to increase its density; reduce its tendency to form dust through a ball-, drum-, or rod- mill. The energy employed for milling the dust is pref. =2 kWh/tonne, esp. 2-5 kWh/tonne; and other substances, e.g. burnt lime, cement, or similar materials, may be added to the mill for mixing with the dust. The processed dust is easier to handle.