平果铝厂赤泥的物相分析

THE STUDY ON PHASE INDENTIFICATION OF RED MUD OF PINGGUO ALUMINIUM PLANT

采用等离子光谱、Ｘ射线衍射、电子显微分析技术研究了平果铝厂赤泥的化学组成和物相组成．结果表明，平果铝土矿拜耳法处理后的赤泥中含赤铁矿（α－Ｆｅ２Ｏ３）、针铁矿（α－ＦｅＯＯＨ）、水化石榴石（Ｃａ３ＡｌＦｅ（ＳｉＯ４）（ＯＨ）８）、一水硬铝石（Ａｌ２Ｏ３·Ｈ２Ｏ）、含水铝硅酸钠（Ｎａ２Ｏ·Ａｌ２Ｏ３·１．６８ＳｉＯ２·１．７３Ｈ２Ｏ）、钙钛矿（ＣａＴｉＯ３）、羟钙石（Ｃａ（ＯＨ）２）、方解石（ＣａＣＯ３）等物相，其中赤铁矿和水化石榴石含量较高，赤泥中还含有可供工业提纯价值的Ｚｒ，Ｖ，Ｎｂ，Ｔａ，Ｓｃ．

The chemical composition and phase composition of red mud of Pingguo Aluminium Plant have been studied by plasma spectrum, X ray diffraction and electron microscopy. It is shown that: the phase composition of the red mud includs α Fe 20 3, α FeOOH, Ca 3AlFe(SiO 4)(OH) 8, Al 2O 3·H 2O, Na 2O·Al 2O 3·1 68SiO 2·1 73H 2O, CaTiO 3, Ca(OH) 2, CaCO 3. Amony them, α Fe 2O 3 and Ca 3AlFe(SiO 4)(OH) 8 are the main phases. There are Zr, V, Nb, Ta and Sc in the mud as well. Especially, the percentage of Sc is 0 014, which is higher than the refining and exploiting standard of the goverment. The result can be used as a theoretical and trial base for the exploiting of the red mud in the future.