METHOD FOR DETECTING COMPLETION OF MELTING OF IRON-CONTAINING COLD CHARGE

PURPOSE:To detect the time when the melting of an iron-contg. cold charge is completed with high precision by measuring the low-frequency component vibrating force and all-frequency component vibrating force of the vibration of a converter body, and considering the time when the ratio of these vibra...

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Bibliographische Detailangaben
Hauptverfasser:	OZAWA KOSAKU, NUIBE TSUZURI, YAMAJI CHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY METALLURGY OF IRON PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
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Beschreibung
Zusammenfassung:	PURPOSE:To detect the time when the melting of an iron-contg. cold charge is completed with high precision by measuring the low-frequency component vibrating force and all-frequency component vibrating force of the vibration of a converter body, and considering the time when the ratio of these vibrating forces reaches a set value to be the completion of melting. CONSTITUTION:An iron-contg. cold charge is charged into a converter, oxygen is blown in from a top-blowing lance, and carbonaceous material and oxygen are blown in from a bottom tuyere to melt the cold charge. In this case, the low-frequency component vibrating force and all-frequency component vibrating force (or high-frequency component vibrating force) of the vibration of the converter are measured, and the ratio of both vibrating forces is calculated. The time when the ratio reaches a set value is considered to be the completion of melting. By this method, the completion of melting of the cold charge can be precisely detected, even when the operating conditions such as the charge SM ratio, top-blown oxygen amt., and bottom-blown gas amt. are changed.