有色金属科学与工程2018，Vol.9Issue(1)：28-33,6.DOI:10.13264/j.cnki.ysjskx.2018.01.005
铜渣在CO2-CO混合气体中焙烧实验研究
A study on the roasting of copper slag in CO2-CO mixed gas
摘要
Abstract
Copper slag is very valuable secondary resource for metallurgy. The main mineral composition of the slag is fayalite, magnetite,copper matte and some amorphous vitreous.This experiment was based on thermodynamic analysis in which CO2 and CO mixed gas was used to control the oxygen potential.The samples were reduced to elemental iron by the mixed gas when roasted at 600~900 ℃.At 1 000 ℃, the presence of FeO in the slag appeared due to the effects of oxygen in the mixed gas system.Fe3O4 was produced in the slag when the slag was calcined for 4 hat 1 100℃.The total iron content was 94.35 %,iron recovery rate reaching 90.8 %. The change of the fayalite phase at 600~1 100 ℃ was 2FeO·SiO2→FeO+SiO2→Fe→FeO→Fe3O4, and the recovery rate of iron rose with the temperature increasing in the roasting slag.It is beneficial for the formation of Fe3O4 when the roasting time is extended and the partial pressure ratio is increased within the proper range.关键词
铜渣/焙烧/CO2-CO/Fe3O4/FeKey words
copper slag/roasting/CO2-CO/Fe3O4/Fe分类
矿业与冶金引用本文复制引用
姜平国,闫永播,刘金生,熊爱虎..铜渣在CO2-CO混合气体中焙烧实验研究[J].有色金属科学与工程,2018,9(1):28-33,6.基金项目
国家自然科学基金资助项目(51564016) （51564016）
江西省自然科学基金资助项目(20151BAB206029) （20151BAB206029）
