Recovery of gibbsite from secondary aluminum production dust by caustic leaching
Recovery of gibbsite from secondary aluminum production dust by caustic leaching
复制标题
碱浸从再生铝生产粉尘中回收三水铝石
DOI：
10.1016/j.mineng.2018.08.012
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发表时间：
2018
影响因子：
4.8
通讯作者：
Mishra, Brajendra
中科院分区：
文献类型：
--
作者：
Jung, Myungwon;Mishra, Brajendra
含铝粉尘的处置会产生热量和气体，并可能从垃圾填埋场产生渗滤液。在本研究中，我们提出了从二次铝生产烟尘中回收三水铝石的两步法--浸出和沉淀法。首先，采用1 M氢氧化钠浸出法制备含铝约20 g/L的铝酸钠溶液。然后在调节pH后进行三水铝石沉淀30 分钟。结果表明，浸出沉淀后铝的总回收率约为87%，X射线衍射仪分析表明，沉淀物的主要成分为Al(OH)3。
The disposal of aluminum bearing dust can cause heat and gases, as well as the potential generation of leachate from landfills. In this research, we suggested a two-step process - leaching and precipitation - for recovering gibbsite from secondary aluminum production dust. First, a sodium aluminate solution, containing about 20 g/L of aluminum, was prepared using 1 M of sodium hydroxide leaching. Precipitation of the gibbsite was then conducted for 30 min after a pH adjustment. As the results indicate, the overall aluminum recovery rate was about 87% by weight after leaching and precipitation, and the major component of the precipitate was Al(OH)3based on an X-ray diffraction(XRD) analysis.