Method for heat application of low-alkalinity casting residue in steel-making

• Main Authors: MA YANLONG, YANG CHUNLEI, CAO ZHONG, ZHAO WEIDONG, ZHANG ZHUXIONG, WANG DINGSHU, SU MEIPING, JI HONGGANG
• Format: Patent
• Language: Chinese; English
• Published: 27.03.2013
• 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

The invention provides a method for heat application of low-alkalinity casting residue in steel-making. The method comprises the following steps that: 5 to 7kg/t of low-alkalinity casting reside of steel slag is added to a converter along with semi-steel under a hot steel state in order to fully utilize the heat of the molten casting residue, and the slag can be quickly generated by blowing for 2 minutes. By adopting the method, the complex slag forming constituent and heating agent requested in a conventional semi-steel smelting process are saved, and the production cost is reduced; the high-alkalinity slag can be quickly formed at low temperature in accordance with the slag formation system; the content of phosphorus of 0.35 to 0.80% in the molten ion can be quickly removed within the normal smelting period, and the final requirement of steel grade can be met; all casting residues in steel making are basically recycled, so that the pressure of residue discharge to the environment and the handling cost can b