SILICIC ACID-CONTAINING POWDER PRODUCTION METHOD AND SILICIC ACID-CONTAINING POWDER PRODUCTION SYSTEM

摘要

It is intended to provide a method of producing a silicic acid-containing powder and a system for producing a silicic acid-containing powder whereby rice hulls and straws are treated within a short time at a low cost without decreasing silicic acid and thus a powder containing natural silicic acid conveniently usable as a straight fertilizer can be produced. The above object is achieved by a method of producing a silicic acid-containing powder from rice hulls or straws which comprises jetting high-pressure steam into rice hulls or straws fed into a treatment container (2) and then powdering the contents while maintaining the pressure in the treatment container (2) at 1.45 MPa to 1.96 MPa.