摘要
铝土矿尾矿是对铝土矿进行选矿之后残留下来的一种以一水硬铝石、高岭石、云母等为主要成分的复杂物料。尾矿的堆存会带来环境污染、土地占用等问题,同时又将造成一定的资源浪费,因此对尾矿的综合利用已成当务之急。在对尾矿的化学组成、物相组成以及热分析等研究的基础上,对尾矿进行了超细加工、表面改性,并开发其作为填料在PVC制品中的应用技术。结果表明:尾矿热稳定性好,成分与常用的无机填料相似,超细加工后粉体粒径小、粒度分布均匀,作为填料具有技术可行性。以尾矿粉60%和20%的填充量分别制得了软质PVC板材和化工用PVC-U管材,制品的主要性能指标均达到标准要求。这种应用技术不仅能够提高尾矿的附加值,而且具有较好的社会和环境效益。
The bauxite tailing is a complicated mineral after beneficiation of bauxite,which mainly contains diaspore,kaolin,mica et al.The pile of tailing will occupy plenty of lands,and pollute the environment and simultaneously,resulting in resource waste.Therefore,it is urgent to make full use of the tailing.Based on the research of chemical compositions,phase composition and thermal analysis for the tailing,this paper introduces the ultra-fine processing as well as surface modification of tailing and its application in PVC plastics.The results indicates that the tailing is probability suitable for usage in PVC plastics filler because of its good thermal stability property,small particle size and uniform size distribution after ultra-fine processing,and even the similar compositions with the common-used inorganic fillers.The main performances of the soft PVC product and the PVC-U pipes for chemical industry meet the standard requirements with the tailing powder of 60% and 20% as filler respectively.This technology of utilization for tailings can not only enhance the extra values of the tailing,but also bring the distinct social and environmental benefits.
出处
《金属矿山》
CAS
北大核心
2010年第9期177-181,共5页
Metal Mine
基金
国家重点基础研究发展计划(973计划)项目(编号:2005CB623701)
中南大学米塔尔创新基金项目(编号:08MX29)
关键词
铝土矿
尾矿
超细
表面改性
PVC填料
Bauxite
Tailing
Ultra-fine
Surface modification
PVC Filler
