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中文摘要：
白云鄂博北方稀土集团选矿厂浮选精矿REO品位为50.12%,杂质成分Ca O、Fe、F和Si O2含量较高,直接用于冶炼不仅降低会产品的质量,还会降低稀土回收率。为给稀土冶炼工艺升级提供优质原料,对其进行了再选提纯试验。结果表明：以Na OH为p H调整剂、水玻璃为抑制剂、LF8#为捕收剂,经1粗3精2扫,中矿顺序返回闭路浮选,可获得REO品位为65.48%、回收率为92.23%的高品质稀土精矿,满足了后续稀土冶炼工艺升级改造对高品质稀土精矿的要求。
英文摘要：
There is 50. 12% REO in a flotation concentrate of a plant in North Rare Earths Group in Baiyan Obo. Impuri- ties composition CaO, Fe, F and SiO2 content is high, not only quality of the products but also rare earth recovery will relatively low when directly used for smelting. To provide quality raw materials for rare earth smelting technology upgrade, reconcentration purification tests were conducted. Results show that using NaOH as pH regulator, sodium silicate as depressor, LF8# as collector, via one roughing-three cleaning-two scavenging and middlings back to the flowsheet in turn closed cirouit flotation process, high quality rare earth concentrate with REO grade of 65. 48% and recovery of 92. 23% was obtained,meet quality demand of the subsequent rare earth smelting technology upgrade.
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