PRODUCTION OF ARTIFICIAL LIGHTWEIGHT AGGREGATE FROM CONSTRUCTION SLUDGE

摘要

PURPOSE:To produce the artificial aggregate by utilizing construction sludge which treatment becomes difficult. CONSTITUTION:The production of an artificial aggregate comprising coating the surfaces of granule nuclei produced from ground paper or its mixture with construction sludge with the construction sludge or its mixture with the ground paper and subsequently firing the produced two layer granules in a firing oven separated from the atmosphere, while controlling the concentration of oxygen in response to the amount of a self-burning material contained in the granules. The granule nuclei may be mixed with coke powder or fine coal to improve their self-burning property, and further the surfaces of the two layer granules may be coated with alumina powder or silica powder for preventing their fusing.