印尼某低品位红土镍矿的热解性能
Series No．482August 2016 金 属 矿 山METAL MINE 总第482期2016年第8期
收稿日期 2016-05-24
基金项目 国家自然科学基金项目(编号:21276172)三作者简介 杨 颂(1987 ),男,博士研究生三通讯作者 上官炬(1962 ),男,教授,博士研究生导师,博士三
印尼某低品位红土镍矿的热解性能
杨 颂1 上官炬1 杜文广1 刘守军2 史鹏政1 梁丽彤1
(1.煤科学与技术教育部和山西省重点实验室,山西太原030024;2.太原理工大学化学化工学院,山西太原030024)
摘 要 为提高红土镍矿火法冶炼工艺技术指标,对印尼某低品位红土镍矿进行了热解性能分析三结果表明:
该红土镍矿属于典型的低品位过渡层红土镍矿,主要组成矿物为利蛇纹石二针铁矿二石英二铁蛇纹石二叶蛇纹石和高岭石,镍主要赋存于蛇纹石二橄榄石等硅酸盐类矿物中,部分以氧化镍形式赋存于针铁矿中三红土镍矿热解分析结果表明:在86?时有1次失重过程,形成1个吸热峰,有H 2O 溢出,对应自由水的脱除;在268?时有1次失重过程,形成
1个吸热峰,有H 2O 溢出,对应针铁矿的脱羟基过程;在589?时发生失重,形成1个吸热峰,有H 2O 溢出,对应高岭石二利蛇纹石的脱羟基反应;在816?时有1个放热峰,而红土镍矿质量没有变化,对应利蛇纹石热解产生无定型的硅酸盐重结晶后产生镁橄榄石(Mg 2SiO 4)及顽火辉石(MgSiO 3)的过程;在1126?时有1次失重过程,有CO 2溢出,由白云石分解产生三试验结果对红土镍矿火法工艺的改进有指导作用三
关键词 红土镍矿 热解 TG -MS TG -dTG DSC
中图分类号 TF815 文献标志码 A 文章编号 1001-1250(2016)-08-098-05Pyrolysis Property of the Low Grade Laterite Ore from Indonesia
Yang Song 1 Shangguan Ju 1 Du Wenguang 1 Liu Shoujun 2 Shi Pengzheng 1 Liang Litong 1
(1.Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Province ,Taiyuan 030024,China ;2.College of Chemistry and Chemical Engineering ,Taiyuan University of Technology ,Taiyuan 030024,China )Abstract In order to improve the technical indicators of pyrometallurgical process of the low grade laterite nickel ore,the
pyrolysis properties of the low grade nickel laterite ore from Indonesia was studied.The results showed that the laterite belong to the typical transition layer laterite.The main mineral composition of the laterite are lizardite,goethite,silica,greenalite,schwei-zerite and kaolinite.Nickel mainly occur in the Ni-riched silicate ores,such as serpentine and olivine.And part of nickel occur-rence as nickel oxide in goethite.The pyrolysis analysis results indicated that first weight loss of the laterite occurred at 86?,which form an endothermic peak and the main violent is H 2O.The first stage corresponded to the evaporated of the free water.The second weight loss of the laterite occurred at 268?,which form an endothermic peak and the main violent is H 2O.The second stage corresponded to the dehydroxylation of goethite.The third weight loss of the laterite occurred at 589?,which form an endothermic peak and the main violent is H 2O.The third stage corresponded to the dehydroxylation of kaolinite and liz-ardite.The laterite form an exothermic peak at 816?,and the quality almost no change,which caused by lizardite pyrolysis produce the amorphous silicate,and the amorphous silicate recrystallization to the forsterite (Mg 2SiO 4)and pyroxene (Mg-SiO 3).The last weight loss of the laterite occurred at 1126?,which form an exothermic peak,and the main violent is CO 2.The last stage corresponded to the dolomite decomposed.The experimental results can be somewhat conductive to improve the
pyrogenic process of the laterite.Keywords Nickel laterite,Pyrolysis,TG-MS,TG-dTG,DSC 镍具有较好的可塑性二耐腐蚀性和磁性等性能,主要应用于钢铁二镍基合金二电镀及电池等领域[1]三我国是镍矿资源和消费大国,然而近年来我国镍矿自
给率急剧下降,致使我国镍矿资源短缺的局面日趋严重[2-3]三红土镍矿因具有冶炼工艺成熟二开发成本低等优势,越来越受到大家的重视[4-5]三然而,红土镍矿
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