METHOD FOR DISSOLVING FLY ASH TO MOLTEN SLAG

PROBLEM TO BE SOLVED: To provide a method for dissolving fly ash to molten slag which can stably and economically dissolve the fly ash of ≥10 mass% which is a quantity larger than the conventional case. SOLUTION: In the method where a lance 12 whose chip part is provided with jetting holes 10, 11 is...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	YUKI TOSHITAKA, YATSUGAYO KENICHI, NOGUCHI SHUJI, TAKAMOTO YASUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	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
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for dissolving fly ash to molten slag which can stably and economically dissolve the fly ash of ≥10 mass% which is a quantity larger than the conventional case. SOLUTION: In the method where a lance 12 whose chip part is provided with jetting holes 10, 11 is immersed into blast-furnace molten slag 14 stored in a pan type vessel 13 having a storage amount of 30 to 100 ton, fly ash with the total iron content of ≤11 mass% is blown into the blast-furnace molten slag 14 using an oxygen-containing gas, and the fly ash is dissolved by ≥10 mass% to the blast-furnace molten slag 14 before the fly ash is melted, the blowing-in of the fly ash is started to the blast-furnace molten slag 14 heated at ≥1,370°C at a blowing rate decided in accordance with the temperature of the blast-furnace molten slag 14, and thereafter, when the dissolution ratio of the fly ash reaches a prescribed value in the range of 5 to 15 mass%, the blowing rate of the fly ash is changed. COPYRIGHT: (C)2010,JPO&INPIT