赤泥基铁水预处理脱硅脱磷剂的设计与开发

Design and Development of Red Mud-Based Desilication and Dephosphorization Agent for Hot Metal Pretreatment

摘要: 本文对拜耳法赤泥进行改质后制备出一种铁水预处理脱硅脱磷剂，在其熔化性能测定的基础上，进行了铁水预处理脱硅脱磷高温模拟实验研究。研究结果表明：在赤泥中适量加入CaO进行改质，可显著降低赤泥的熔点，提高其熔化速度。利用赤泥与CaO质量比为100:30的赤泥基脱硅脱磷剂进行铁水预处理，铁水脱硅率达到98.2%，脱磷率达到75.5%，脱硅脱磷效果显著。

Abstract: A novel desilication and dephosphorization agent for hot metal pretreatment was designed and developed by the chemical modification of Bayer red mud. According to the determination results of melting properties for the red mud-based desilication and dephosphorization agent, the simulation experiment of the hot metal pretreatment was carried out at high temperature, and the results were shown as follows. The melting properties of the red mud-based desilication and dephosphorization agent could be improved remarkably by a proper addition of CaO. The red mud-based desilication and dephosphorization agent with the mass ratio of 100:30 for red mud and CaO was used in the simulation experiment process of the hot metal pretreatment. The desilication ratio and the dephosphorization ratio in the hot metal reached 98.2% and 75.5%, respectively.