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物相组成为混合稀土氧化物和氟化物的氟碳铈精矿加硼酸焙烧后,发生了稀土物相的变化,铈成为难溶于酸的二氧化铈晶格,非铈稀土生成易溶于酸的硼酸镧晶格,扩大了欲分离的铈与非铈稀土之间的的性质差别。因而,从精矿分离铈与非铈稀土获得成功。借助于 x—衍射物相分析研究确定了精矿的稀土晶格结构,探讨了焙烧反应过程。其氟碳铈精矿与硼酸焙烧的主要反应为:〈1〉RxOy+H_3BO_3CeO_2+LaBO_3+H_2O↑〈2〉RF_3+H_3BO_3+H_2OCeO_2+LaBO_3+HF↑
The phase composition of mixed rare earth oxides and fluorides bastnaesite concentrate plus boric acid roasting, the occurrence of the rare earth phase changes, cerium into a sparingly soluble in acid ceria lattice, non-cerium rare earth generated easily soluble in The acid lanthanum borate lattice broadens the difference in properties between the cerium and non-cerium rare earths to be separated. Thus, the separation of cerium from non-cerium rare earths is successful. By means of x-diffraction phase analysis, the rare earth lattice structure of the concentrate was confirmed and the roasting reaction process was discussed. The main reactions of bastnaesite concentrate and boric acid roasting are: <1> RxOy + H_3BO_3CeO_2 + LaBO_3 + H_2O ↑ <2> RF_3 + H_3BO_3 + H_2OCeO_2 + LaBO_3 + HF ↑