METHOD OF MANUFACTURING GRANULATED BLAST FURNACE SLAG

• Main Authors: YUKI TOSHITAKA, YATSUGAYO KENICHI, NOGUCHI SHUJI, TAKAMOTO YASUSHI
• Format: Patent
• Language: English
• Published: 06.11.2008
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; DISPOSAL OF SOLID WASTE; FURNACES; HEATING; KILNS; LIGHTING; LIME, MAGNESIA; MANUFACTURE OF IRON OR STEEL; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OVENS; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINED SOIL SOIL; REFRACTORIES; RETORTS; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE; WEAPONS

PROBLEM TO BE SOLVED: To provide a method of manufacturing granulated blast furnace slag in which the scattering of molten slag particles in a melting treatment of injecting flyash into molten blast furnace slag is suppressed, the scattering of the flyash particles is suppressed, the flyash is melted in the molten blast furnace slag in a high yield and the loss of a lance and a nozzle is suppressed in injection. SOLUTION: In the manufacture of the granulated blast furnace slag, the quantity of oxygen-enriched air or oxygen is controlled so that the theoretical combustion temperature when carbon contained in the flyash is combusted with the oxygen-enriched air or oxygen is made higher than a flyash melting start temperature and the lance is dipped into the molten blast furnace slag and the flyash is injected into the molten blast furnace slag in the lateral direction with the oxygen-enriched air or oxygen from a nozzle mounted in the lance. COPYRIGHT: (C)2009,JPO&INPIT