Rare earth adding method for throwing Fe-RE intermediate alloy into steel ladle

• Main Authors: ZHAO DIANQING, HE JINGCHUN, WANG RONG, WANG HAIMING, ZHANG HUI, HE JIANZHONG, CHENG DEFU
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2012
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention relates to a rare earth adding method for throwing Fe-RE intermediate alloy into a steel ladle. The method is characterized by comprising the following steps of: preparing the Fe-RE intermediate alloy into granular ingots or blocks with the granularity of 5 to 30 mm; placing the Fe-RE intermediate alloy granules into double-layer film-laminated packaging bags (plastic bags); packaging into Fe-RE intermediate alloy bagged products, wherein one bag comprises 5 to 25 kilograms of the Fe-RE intermediate alloy granules; refining molten steel in the steel ladle; performing calcium treatment on the molten steel in the steel ladle; throwing the double-layer film-laminated packaged Fe-RE intermediate alloy into the central position of the liquid surface of the molten steel according to the calculated adding amount; and blowing argon into the steel ladle continuously for 3 to 5 minutes. The method has the advantages that: the mode of throwing the Fe-RE intermediate alloy into the steel ladle is applied to