METHOD FOR EVALUATING LOW-TEMPERATURE REDUCTION DISINTEGRATION OF SINTERED ORE

PROBLEM TO BE SOLVED: To provide a method for evaluating reduction disintegration of a sintered ore in a blast furnace, by which the difference of the disintegrating ratio caused by the difference between the sintered ore brands can be detected, that has been difficult by the conventional method for...

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Bibliographische Detailangaben
Hauptverfasser:	FUKUMOTO CHIEKO, YAMAMOTO TETSUYA, SATO TAKESHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MANUFACTURE OF IRON OR STEEL MEASURING METALLURGY METALLURGY OF IRON PHYSICS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TESTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for evaluating reduction disintegration of a sintered ore in a blast furnace, by which the difference of the disintegrating ratio caused by the difference between the sintered ore brands can be detected, that has been difficult by the conventional method for evaluating reduction disintegration, and further which does not require change in a testing condition according to the operation. SOLUTION: In the method for evaluating the low-temperature reduction disintegration of a sintered ore as a raw material of ore in the blast furnace, when the reducing-test is performed, the blending ratio of CO gas is set to be 10-80 vol%, and in accordance with the temperature-variation at the reducing-test, the gas ratio CO/(CO+CO2) in the mixed gas of CO, CO2and N2, which satisfies 0.4≤CO/(CO+CO2)≤0.9, is changed. COPYRIGHT: (C)2010,JPO&INPIT