工程科学学报2017，Vol.39Issue(12)：1809-1814,6.DOI:10.13374/j.issn2095-9389.2017.12.005
镍沉降渣深度还原过程中的相变特征
Phase transformation of nickel slag in settlement furnaces during deep reduction
刘晓民 1张晓亮 1王超 1寇珏 1孙春宝1
作者信息
- 1. 北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083
- 折叠
摘要
Abstract
In this study, the mineral composition and embedded features of the nickel slag as well as its phase transformation in a settlement furnace during deep reduction were investigated through chemical composition analysis, X-ray diffraction, optical microsco-py, scanning electron microscopy, and energy dispersive spectrometry. The results show that the phase composition of slag includes hortonolite and glass. The Cu-Ni-Fe sulfide mineral is distributed in the silicate irregularly, and the sulfide material is too small to re-claim. The nickel slag transforms into akermanite, ferronickel, augite, cancrinite, riebeckite, and quartz by deep reduction. The process is characterized by constant mineral components of reduzate, and the contents of akermanite and ferronickel are the most when heated to 1300℃. The reduction time is also an important factor during the process, and the contents of ferronickel increase over time, maximizing at 120 min. The thermodynamic analysis shows that the main reaction performed during the reduction is that olivine and calcium oxide transform into akermanite and FeO, and then the FeO is reduced to iron by C and CO. The metal sulfides, calcium oxide, and C are transformed into copper and nickel and then dissolved in the iron, and the CaS then crystallized out with the silicate minerals.关键词
镍渣/深度还原/相变/热力学Key words
nickel slag/deep reduction/phase transformation/thermodynamics分类
矿业与冶金引用本文复制引用
刘晓民,张晓亮,王超,寇珏,孙春宝..镍沉降渣深度还原过程中的相变特征[J].工程科学学报,2017,39(12):1809-1814,6.
