Environmental purification powder and its manufacturing method, and environmental purification molded products

摘要

PROBLEM TO BE SOLVED: To provide an environment purifying powder which consists of waste foundry sand, has a low energy cost needed for manufacture, shows a small possibility of contaminating the environment, and has an excellent function as a biological carrier, a manufacturing method for the same, and an environment molding.SOLUTION: Waste foundry sand (containing 4 mass% as carbon content) resultant from an organic sand mold containing an organic binder resin wasted from a foundry is collected to remove impurities through a screen (solid removal step S1). Next, as a heating process S2, particles of less than 5 mm fractionated in the solid removal step are fed to a heating furnace and heated for about 20 minutes at 300°C.SELECTED DRAWING: Figure 1