基于调渣提铁的镍冶炼渣熔化温度调控
Nickel smelting slag melting temperature regulation based on slag transfer and iron lifting
王冠杰 1赵俊学 1曹赓 1郑江华 2李彬 1马永峰 2崔雅茹 1宗红星2
作者信息
- 1. 西安建筑科技大学 冶金工程学院,西安 710055
- 2. 金川集团股份有限公司 镍钴设计研究院,金昌 737100
- 折叠
摘要
目前,镍渣提铁工艺存在提铁效率低、工艺实施难度大、成本高等问题.本文通过相图分析、单因素和正交实验等方法,研究了炉渣中主要氧化物含量对半球点温度的影响,得到了有利于提铁的炉渣渣型优化方案.结果表明:当CaO含量(质量分数)为25％、MgO含量为9％、铁硅比为0.8时,该渣型的半球点温度最低.考虑到现行工艺,选择MgO含量为13％、CaO含量为20％、铁硅比为1.0为较优方案,所得炉渣的半球点温度明显低于现行顶吹炉渣的半球点温度.调整后的炉渣中含铁物相由以硅酸亚铁为主转化为以钙铁榴石和铁氧化物为主,有利于后续提铁.
Abstract
At present,the process of nickel slag iron extraction faces problems,such as low iron extraction efficiency,difficult process implementation and high cost.This paper explored the effects of the main oxide contents in the slag on the hemispheric point temperature by designing single-factor experiments,optimising the slag type using orthogonal tests and carrying out thermodynamic analysis of the melting characteristics of top-blown nickel slag system.The results show that the slag type has the lowest hemispheric point temperature with CaO content of 25％,MgO content of 9％and iron-silion ratio of 0.8.In view of the current process,the preferred solution combines with MgO content of 13％,CaO content of 20％and iron-silion ratio of 1.0,the hemispherical point temperature of the obtained slag is significantly lower than that of the current top-blown slag.After adjustment,the iron phase in the slag is converted from ferrous silicate to calcium herenite and iron oxide,which is better for follow-up iron lifting.
关键词
镍渣/半球点温度/正交试验/渣型Key words
nickel slag/hemispheric point temperature/orthogonal test/slag type引用本文复制引用
基金项目
国家自然科学基金资助项目(51674185)
陕西省科学技术厅专项资助项目(2022GY-160)
出版年
2024
NETL
NSTL
万方数据