文章基本信息

标题：Anorthosites in Greenland: a possible raw material for aluminium?
本地全文：下载
作者：Christian Knudsen ; Jan Wanvik ; Henrik Svahnberg 等
期刊名称：Geological Survey of Denmark and Greenland Bulletin
印刷版ISSN：1604-8156
出版年度：2012
卷号：26
页码：53-56
语种：English
出版社：De Nationale Geologiske Undersoegelser for Danmark og Groenland
摘要：The famous Swiss-born, Norwegian geologist and geochemist Victor Goldschmidt suggested that anorthosite could beused as a source of aluminium replacing bauxite, and acidleaching of the anorthosite was his innovative idea. Anorthosite is a rock type consisting of more than 90% plagioclasewhich is an acid-soluble, aluminium-rich silicate mineral occurring in basement rocks of both Norway and Greenland(Fig. 1). Experiments conducted in Norway during the century after Goldschmidt’s initial idea showed that it is technically possible to use anorthosite as a raw material in the production of aluminium metal. Goldschmidt mapped parts ofthe large anorthosite massifs along Sognefjord in the period1916–1919. During the Second World War, sampling andcore drilling were conducted in Norway, and an anorthositemine was opened by Norsk Hydro where up to 400 men wereemployed and some 15 000 tonnes of rock were quarried before sabotage ended the work in 1945. There was renewedinterest in anorthosite as an alternative raw material foraluminium in Norway in the years 1976–1982, but experiments conducted in this period did not lead to an economically viable concept. Recent developments at the Institute forEnergy Technology in Norway have led to the discovery of amore promising process based on nitric acid that can yieldadditional products such as Precipitated Calcium Carbonate(PCC) for the paper industry, amorphous silica and ammonium nitrate fertiliser. The process can also be used as a sinkfor CO2 by taking CO2 from, for example, a power plant andbinding it to PCC.