METHOD FOR KILLING SLAG FOAMING AT THE TIME OF REFINING MOLTEN METAL

• Main Author: AIZAWA KANJI
• Format: Patent
• Language: English
• Published: 09.12.1997
• Edition: 6
• Subjects: 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

PROBLEM TO BE SOLVED: To effectively utilize sludge containing oil as a killing agent for slag foaming. SOLUTION: The oil-containing sludge 2 is deposited in a sludge settled vessel and separated from water 21 and once, carried into a basin 8 and after dehydrating, this dried aludge is piled on a solar drying field 7. Natural drying is executed with solar heat and this sludge is made to be a dried oil-containing sludge 20 having <=40wt.% moisture and also, a binder is added from a binder spraying machine 24 loaded on a truck 23, and this sludge is kneaded and aged and further, made to coarse granulation. This dried oil-containing sludge 20 is discharged from a portable hopper 22 as the killing agent for slag foaming and charged into the foaming slag 15 floated on desiliconized molten iron 10 in a torpedo car 11 to quickly kill the foaming of the slag by foaming killing action by gasifying the oil content.