当前,世界各国低品位磷矿选矿研究工作都在大力加强。对岩浆型和硅质沉积型的磷矿石选矿工艺已此较成熟,而对最难选的硅-钙质型磷块岩选矿工艺,早在五十年代,美国、苏联和中国就作了大量研究工作,但均未很好地解决这一问题;到了七十、八十年代,此类矿石的选矿研究有所突破,有的已获得专利权。但此类矿石的选矿工艺至今仍被作为一项重要的研究课问题。 At present, the world’s low-grade phosphate rock beneficiation research efforts are vigorously strengthened. For the magmatic and siliceous sedimentary phosphate ore beneficiation process has been more mature, and for the most difficult to select silicon - calcium phosphate type rock phosphate beneficiation process, as early as the fifties, the United States, the Soviet Union and China made A lot of research work, but none of them solved the problem well; by the 1970s and 1980s, the ore beneficiation research of this kind of ore has made some breakthroughs, and some of them have obtained the patent right. However, the beneficiation process of such ores is still an important research subject until now.