贵州瓮福地区磷尾矿中钙、镁、磷的赋存状态测定

Determination of Naturally Endowed States of Calcium, Magnesium and Phosphorus in Phosphorite Tailings Sampled from Wengfu District of Guizhou Province

摘要: 应用化学组分分析、X射线衍射分析、扫描电子显微镜及X射线能谱法等多种方法对贵州省瓮福地区磷尾矿中钙、镁及磷的赋存状态作了分析和研究。结果表明:① 选自该矿区的磷尾矿为高镁(wMgO 17.26%~17.65%),高钙(wCaO 34.11%~34.56%),低磷(wP2O5 5.30%~5.69%)的固体矿物;② 尾矿中镁主要以白云石形式存在,并有少量以磷酸盐和硅酸盐形式存在;钙主要也以白云石形式存在,加上少量以方解石和磷酸盐形式存在;磷主要以磷灰石形式存在,有少量存在于铁氧化物及独居石、磷钇矿中。

Abstract: Naturally endowed states of calcium, magnesium and phosphorus in phosphorite tailings sampled from Wengfu district of Guizhou province were studied and analyzed by chemical analysis, X-ray diffraction analysis, scanning electron microscopy and X-ray photoelectron spectrometry. It was found that: ① the phosphorite tailings sampled from the ore slag were solid minerals containing high magnesium (wMgO 17.26%-17.65%), high calcium (wCaO 34.11%-34.56%) and low phosphorus (wP2O5 5.30%-5.69%). ② Magnesium in the tailings was mainly present in form of dolomite with small amounts present as phosphate and silicate; calcium was also present mainly as dolomite with small amounts present as calcite and phosphate; phosphorus was present mainly as apatite with small amounts occurred in iron oxide, monazite and xenotime.