1985年初,民主德国阿尔滕贝格锡矿开始对浮选厂进行大规格的扩建和现代化改造。目前,该项工作已经结束,锡浮选厂开始投产。选厂处理量为840000吨/年,是目前世界上规模最大的锡浮选厂。阿尔滕贝格矿山的开采早在十四世纪就已开始。原矿锡品位0.2～0.3%,0.1毫米细粒占90%。共生矿物有:砷黄铁矿(0.1%)、斜方砷铁矿、黑钨矿、辉铋矿和辉钼矿(0.01%),脉石矿物有:石英(48%)、 At the beginning of 1985, the tin mine of Altenberg, Germany, began to expand and modernize flotation plants in a large scale. At present, the work has ended, tin flotation plant started production. Processing capacity of 840000 tons / year, is the world’s largest tin flotation plant. The mining of the Altenberg mine began as early as the fourteenth century. Raw ore tin grade 0.2 ~ 0.3%, 0.1 mm fine particles accounted for 90%. The symbiotic minerals are arsenopyrite (0.1%), orthopyontite, wolframite, bismuthinite and molybdenite (0.01%). The gangue minerals include quartz (48%),