摘要
采用HSC Chemistry热力学计算软件对焦炭和一氧化碳与锌冶炼石膏渣还原反应进行了分析,探索分解温度、平衡常数、耗能与还原介质的关系。结果表明,在高温和弱还原介质条件下,石膏渣中Ca SO_4还原分解成Ca S均比Ca O容易进行。还原剂中的碳优先与中间产物金属氧化物发生还原反应,从而得到蒸气Zn_((g))和Pb_((g)),随着CO浓度逐渐增大,反应体系将加快反应的进程。从能量消耗来看,CO对降低石膏渣还原分解的能耗有明显的优势;而从反应进程来看,还原剂C更有利于锌氧化物的高效挥发。
Thermodynamic calculation software HSC Chemistry was used for analysis of the reductive reaction of gypsum slag with coke and carbon monoxide.The relationships of reducing agent and decomposition temperature,equilibrium constant,energy consumption were explored.The results showed that,it was easier for CaSO4to be decomposed into CaS than into CaO with high temperature and weak reducing medium.Carbon was priority reacted with intermediate metal oxide,resulting gaseous Zn（g）and Pb（g）generated.In the view of heat,the energy consumption was lower with CO as reducing agent.Nevertheless the reducing reaction was easier using coke as reducing agent from the reaction process.
作者
谢容生
谢天鉴
刘维维
王少龙
林琳
XIE Rongsheng1,2,3, XIE Tianjian1,2,3, LIU Weiwei1,2,3,WANG Shaolong1,2,3, LIN Lin1,2,3,(1.Kunming Metallurgy Research Institute, Kunming 650503, China; 2.State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources, Kunming 650503, China; 3.Key Laboratory of New Technology for Mineral Processing and Metallurgy of Yunnan Province, Kunming 650031, China.)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2018年第2期151-156,共6页
Environmental Science & Technology
基金
云南省危险废物处理专项(2016YWF001)
关键词
石膏渣
还原分解
热力学
还原剂
gypsum slag
reductive decomposition
thermodynamic
reducing agent
