含砷铁矿石烧结脱砷的试验研究

来源期刊：钢铁2010年第6期

论文作者：吕庆 张淑会 胡晓

文章页码：7 - 11

关键词：含砷铁矿石； 烧结； 脱砷； 工艺参数

Key words：iron ore with arsenic； sintering； dearsenication； process parameter

摘    要：采用化学分析、XRD、高倍显微镜、EDS、XPS及原子吸收光谱分析等测试技术确定华南含砷铁矿石的理化性质,研究不同因素对华南含砷铁矿石烧结脱砷的影响并确定适宜的烧结脱砷工艺参数。结果表明:华南含砷铁矿石主要以磁铁矿和脉石为主,其中砷以FeAsS及少量As₂S₃形式存在,其质量分数为0.282%。华南含砷铁矿石烧结过程砷化物主要发生FeAsS的氧化和热分解反应。在弱氧化气氛条件下,华南含砷铁矿石的脱砷率随反应温度的升高、恒温时间的延长、焦粉配入量的提高而增加。反应温度1050~1100℃、恒温时间8¹5 min、焦粉配入量6%为适宜的脱砷工艺参数。

Abstract: The physicochemical properties of iron ore with arsenic in South of China was analyzed by chemical analysis,XRD,high power microscope,EDS,XPS and atomic absorption spectrometry method.The effects of various factors on dearsenication in sintering process were studied and the optimal technique parameters were obtained.The results show that the mineral of iron ore with arsenic in South of China mainly composes of magnetite and gangue,in which arsenic with 0.282% mass content exists as FeAsS and few as As₂S₃.The oxidation and thermal decomposition reaction of FeAsS occurs in sintering process.Under low oxidizing atmosphere the dearsenication rate of iron ore with arsenic in South of China increase when the reaction temperature increases,the reaction time extends,or the coke powder content rises.The optimal removal arsenic process parameter is: reaction temperature 1 050-1 100 ℃,reaction time 8-15 min,and coke powder content 6%.