PRODUCTION OF CLEAN STONE FOR AIR, WATER AND SEWAGE

摘要

PURPOSE:To produce a clean stone having deodorizing and sterilizing effects by foaming black silica with a thickener and embedding a permanent magnet in the center of the resulting jelly. CONSTITUTION:Black silica contg. silicon dioxide and carbon is blended with concrete or synthetic resin in about 3 : about 7 ratio, this blend is foamed and a permanent magnet is embedded in the center of the resulting expanded body to obtain a clean stone for air, water and sewage. When the clean stone is put in water, the effects of the black silica absorbing an offensive odor and sterilizing various bacteria are doubled by magnetic flux from the permanent magnet and the stone produces the effects over a long period of time.