SHELL CALCIUM POWDER AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a new calcium production technique by which a recarbonation reaction of cationized calcium oxide powder is effectively inhibited even after long-term storage and high quality can be maintained over a long period of time even in a usual warehouse environment.

SOLUTION: The shell calcium powder is obtained as follows: preliminarily washed (1) and dried (2) shells consisting primarily of calcium carbonate are fired (4) by heating in a temperature range of 900-1,000°C; cationized calcium oxide flakes are cooled (5) to ordinary temperature and pulverized (6); impurities are removed (7); and the resulting powder is mixed in a solvent such as an alcohol and mixed (10) with an extracted (8, 9) antibacterial Chinese herbal component in a predetermined ratio to form one of a coating layer, an impregnation layer and a chemical reaction layer each comprising the antibacterial Chinese herbal component or a composite layer of those on at least a surface of each fine particle of the powder in contact with air.

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