Method for capturing and absorbing suspending impurities in tundish

• Main Authors: ZHANG LI'NA, QI ZHIYU, WANG RONG, ZHANG YUE, MEI XUEHUI, WANG WENKE, WANG HANTONG, LI ZELIN, FU GANG
• Format: Patent
• Language: Chinese; English
• Published: 25.12.2013
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

The invention relates to the field of continuous casting of slabs, in particular to a method for capturing and absorbing suspending impurities in a tundish. The method is characterized in that a dike building plate containing CaCO3 is arranged at the bottom of the tundish, a nucleation center and bubble power are self-generated in the process of pouring by utilizing heat burst characteristics of the CaCO3 material, and oxides in the continuously-cast tundish are captured and removed to enter furnace slag. The method specifically includes that 1), the dike building plate is built on one side of a tundish dike at the bottom of the tundish; 2), in the process of pouring, CaCO3 particles burst and decompose layer by layer, generated CO2 and CaO particles enter molten steel, slag washing is performed on the molten steel flowing through above, a protection atmosphere is formed, the CaO particles are combined with aluminum impurities, and the objective of purifying the molten steel is achieved. Compared with the pri