Deslagging process of unrefined steel

• Main Authors: LIAO QIANHONG, JIN JINWEN, DONG BIAO, WANG HE, ZHENG WEIMIN
• Format: Patent
• Language: Chinese; English
• Published: 10.06.2009
• Subjects: CHEMISTRY; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

The invention relates to non-refined steel slag washing technology. The non-refined steel slag washing technology adopts a technical proposal that a slag washing material comprises the following raw materials by weight percentage: 20 to 70 percent of Al3O2, 15 to 60 percent of Ca(OH)2, 0.5 to 20 percent of Al and 1 to 15 percent of CnH[2n+2], wherein n is a positive integer between 10 and 14. The non-refined steel slag washing technology comprises: discharging molten steel; continuously and uniformly putting the slag washing material into the molten steel, wherein the input quantity of every ton of molten steel is between 6 and 7 kilograms; sending the molten steel to a feeding station for calcium treatment, wherein the addition of calcium aluminate in every ton of molten steel is between 1.8 and 2.6 kilograms; and sending the molten steel into a high-grade steel production line after calcium treatment. The method is simple and has low cost; and the discharged molten steel is subjected to deep deoxidation wit