Control technology for B-class inclusions of low-carbon low-sulfur pipeline steel

The invention relates to a control technology for B-class inclusions of low-carbon low-sulfur pipeline steel. The technological process comprises molten iron pretreatment, converter smelting, deoxidation, slagging and alloying of tapped steel, slagging, deoxidation and desulfurization through an LF...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG XIAOWEI, CAO YULIANG, WU GUOPING, JIA PAN, CAI KESEN, ZHOU GUICHENG
Format:	Patent
Sprache:	chi ; 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:	The invention relates to a control technology for B-class inclusions of low-carbon low-sulfur pipeline steel. The technological process comprises molten iron pretreatment, converter smelting, deoxidation, slagging and alloying of tapped steel, slagging, deoxidation and desulfurization through an LF refining furnace, treatment through a RH vacuum furnace, calcium treatment, soft stirring and continuous casting. Deep desulfurization and drossing are conducted through molten iron pretreatment, tapped aluminum blocks are subjected to deep deoxidation, and top slag of composite refining slag is modified. LF refining furnace aluminum wire slag is subjected to deoxidation and lime slagging, aluminum wires are fed for finely adjusting the aluminum content in molten steel, the steel ladle top slag alkalinity is adjusted, reasonable argon bottom blowing control in the whole LF furnace smelting process is combined, diffusion deoxidation and precipitation deoxidation are organically combined, the steel ladle top slag alk