INORGANIC POWDER GRANULATING METHOD, INORGANIC FOAMED BODY HAVING DEFORMED SECTION, ITS PRODUCTION AND ARTIFICIAL LIGHTWEIGHT AGGREGATE AND RIDGING

摘要

PURPOSE:To provide an inorg. foamed body appropriate as the artificial lightweight aggregate and ridging and to produce a granulated inorg. powder as the material for the foamed body. CONSTITUTION:A slightly excess of water over the saturation water absorption of an inorg. powder is added to the powder, the mixture is kneaded and press- formed, the obtained wet formed material having surface water or slurry inorg. powder is dehydrated, and the obtained wet cake having surface water is disintegrated and granulated by a disintegrating blade and an impeller. In this case, a dry powder is gradually added during granulation to obtain the granulated material having a deformed section and free of surface water. The granulated material is calcined and foamed to produce a granular inorg. foamed body having a deformed section. Artificial aggregate or ridging is obtained from the foamed body.