含砷铁精矿球团预氧化-弱还原焙烧过程中砷的挥发行为
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Release time:2016-07-06 Affiliation of Author(s):中南大学,资源加工与生物工程学院 Journal:中南大学学报(自然科学版) Place of Publication:湖南长沙 Funded by:国家杰出青年科学基金资助项目，国家自然科学基金资助项目 Key Words:砷；预氧化；弱还原焙烧；铁矿球团 Abstract:在分析含砷矿物的理化性质和含砷铁精矿矿物学特征的基础上,研究含砷铁精矿球团中砷在预氧化-弱还原焙烧过程中的挥发行为.研究结果表明:内蒙古黄岗铁精矿伴生砷含量为0.344%,且主要以砷黄铁矿形式存在;在200～350 ℃的干燥阶段不存在砷的挥发;在预热温度为870 ℃,预热时间为6 min,氧含量为6%的条件下,预氧化过程中砷挥发率可达到26.54%,预氧化球团中残余砷主要以砷酸盐形式存在;在无烟煤用量为20%,还原升温时间为60 min,恒温焙烧时间为40 min的条件下,成品球团矿中砷残留量为0.035%,挥发率达到88.54%;工业生产中应考虑在预氧化阶段和还原焙烧阶段设置砷的回收装置. Co-author:郭宇峰, 李光辉, 韩桂洪, 张元波*, 黄艳芳, 姜涛 Indexed by:Unit Twenty Basic Research Discipline:冶金工程学 Document Type:J Volume:41 Issue:1 Page Number:1-7 Translation or Not:no Date of Publication:2010-08-13 Links to published journals:http://d.wanfangdata.com.cn/Periodical/zngydxxb201001001 -
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含砷铁精矿球团预氧化_弱还原焙烧过程中砷的挥发行为_姜涛.pdf
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