Hydraulic lime and its manufacturing method

摘要

PROBLEM TO BE SOLVED: To provide: hydraulic lime using deposit minerals from volcanic ejecta as a raw material; and an advantageous method for producing the same.SOLUTION: Provided is hydraulic lime that uses lime and fine powder of a volcanic glass material separated from deposit minerals from volcanic ejecta and contains at least one selected from free CaO, belite, wollastonite, and gehlenite. Preferably, the volcanic deposit is shirasu. Further, it is preferable to recover from the volcanic deposit minerals by using at least two cyclones: coarse grains by means of cyclone classifiers 12 to 14 for recovering coarse grains; fine grains by means of a cyclone classifier 15 for recovering fine grains; and fine powder by means of a dust collector 16 for recovering fine powder, where the fine powder is preferably used as the raw material.SELECTED DRAWING: Figure 1