一、前言在白云鄂博矿床的矿物原料中,铁的主要工业矿物是磷铁矿和赤铁矿,稀土的主要工业矿物是氟碳铈矿和独居石,这在五十年代初期矿床大规模勘探之时已经确定,并为后来的选矿冶炼实践所证实。而作为其中钐、铕、钕、铌的主要工业矿物的易解石的发现,则是五十年代后期的事情。经过二十余年的实践,今天,有必要强调:易解石应做为白云矿山钐、 I. INTRODUCTION Among the mineral raw materials of the Bayan Obo deposit, the major industrial minerals of iron are phosphine and hematite. The major industrial minerals of rare earth are bastnaesite and monazite. This is the result of large-scale exploration of deposits in the early 1950s The time has been confirmed, and confirmed by the practice of dressing and dressing later. The discovery of calcite, the major industrial mineral of samarium, europium, neodymium and niobium, was the late fifties. After more than twenty years of practice, today, it is necessary to emphasize: calcite should be used as a cloud of white sands,