METHOD FOR PRODUCING FINE SILICA POWDER

摘要

PROBLEM TO BE SOLVED: To provide a method for efficiently producing a fine silica powder that is derived from organic waste and has an average particle diameter of 3 μm or less.SOLUTION: The method for producing a fine silica powder includes: a step of primarily calcinating a silica-containing organic waste to produce a carbide; a step of comminuting the composite carbide made of carbide and silica to make it into a fine carbide powder having an average particle diameter of 3 μm or less; and a step of secondarily calcinating the fine carbide powder and decompose and remove the carbon component to produce a fine silica powder having an average particle diameter of 3 μm or less.SELECTED DRAWING: Figure 2