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摘要:
这是一篇工艺矿物学领域的论文。为查清某伴生钪的低品位钛矿矿石性质,采用化学分析、电子探针、X射线衍射、AMICS矿物自动分析仪和光学显微镜等手段,对矿石的物质组成、矿物嵌布特征以及钪、铁、钛元素的赋存状态进行了详细的工艺矿物学研究。结果表明:矿石中钪主要赋存于钙镁硅酸盐中,分布率达94.93% ,仅针对钙镁硅酸盐类矿物进行选冶工作即可取得优异的钪回收指标。研究结果对钛矿石伴生钪的选冶及矿床下一步开发利用具有重要指导意义,也对类似含钪钛矿床中钪的赋存状态研究具有重要启示。
Abstract:This is an essay in the field of process mineralogy. In order to find out the properties of low-grade titanium ore with scandium, chemical analysis, electron microscope, X-ray diffraction, automatic mineral analyzer and optical microscope are used to analyze the material composition and mineral embedding characteristics of the ore. From the perspective of process mineralogy, the occurrence state of titanium, iron, and scandium has been studied in detail. The results show that the scandium in the ore mainly occurs in calcium-magnesium silicate, with a distribution rate of 94.93%. An excellent scandium recovery index can be obtained by beneficiating and smelting this silicate mineral. The research results have important guiding significance for the selection and smelting of scandium associated with titanium ore and the next development and utilization of the deposit. It also has important implications for the study of the occurrence of scandium in similar scandium-bearing titanium deposits.
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Key words:
- Process mineralogy /
- Northwest China /
- Ilmenite /
- Magnetite /
- Scandium /
- Calcium magnesium silicate minerals /
- Occurrence state
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表 1 矿石主要化学成分分析结果 /%
Table 1. Chemical analysis results of raw ore
K2O TFe TiO2 MgO Al2O3 CaO Al2O3 Na2O MnO SiO2 P 0.14 10.21 4.54 6.10 11.40 12.55 11.41 2.55 0.17 43.73 0.11 V2O5 S Sc2O3* Sr* Cr* W* Y* Ge* Ga* Ce* Co* 0.07 0.04 55.50 323 50.9 28.3 19.7 17.1 17 14 60.0 *单位为g/t。 表 2 矿石矿物含量
Table 2. Mineral composition and content of raw ore
矿物类别 矿物名称 含量/% 电磁性脉石 角闪石、辉石 45.63 绿泥石 1.35 橄榄石 0.33 云母 0.12
非磁脉石长石 39.82 方解石 0.86 磷灰石 0.68 石英 0.45 石膏 0.34 铁矿物 磁铁矿 2.34 赤-褐铁矿 0.47 钛矿物 钛铁矿 6.80 榍石 0.04 微量矿物 磁黄铁矿、毒砂、黄铁矿、
黄铜矿、锆石等偶见 表 3 钛铁矿的电子探针分析结果 /%
Table 3. Electron probe analysis results on the Ilmenite
点号 FeO TiO2 Sc2O3 SiO2 MnO 1 47.775 49.781 0.000 0.029 0.900 2 48.784 50.037 0.008 0.077 0.702 3 47.701 50.325 0.017 0.115 0.792 4 47.554 50.262 0.003 0.018 0.739 平均 47.954 50.101 0.007 0.06 0.783 表 4 磁铁矿电子探针分析结果/%
Table 4. Electron probe analysis results on the magnetite
序号 FeO TiO2 Cr2O3 V2O5 Sc2O3 1 92.764 0.218 0.437 1.942 0.000 2 92.954 0.221 0.065 1.122 0.009 3 92.697 0.184 0.108 2.841 0.000 4 92.199 0.184 0.883 1.541 0.014 5 91.669 0.402 1.066 1.873 0.008 平均 92.456 0.242 0.512 1.864 0.006 表 5 角闪石电子探针分析结果/%
Table 5. Electron probe analysis results on the hornblende
序号 CaO FeO Na2O K2O TiO2 Sc2O3 MgO SiO2 Al2O3 1 19.231 12.686 0.462 / 2.961 / 12.438 50.691 2.726 2 20.894 12.348 0.362 0.010 2.297 0.053 11.837 51.663 1.277 3 19.325 12.973 0.485 0.019 1.173 0.006 12.674 50.448 3.280 平均值 19.817 12.669 0.436 0.010 2.144 0.020 12.316 50.934 2.428 表 6 辉石电子探针分析结果/%
Table 6. Electron probe analysis results on the pyroxene
序号 Na2O K2O TiO2 Sc2O3 MgO CaO FeO SiO2 Al2O3 1 1.892 0.523 3.64 0.003 11.23 10.725 15.656 41.285 13.369 2 2.04 0.466 2.125 - 11.657 11.129 13.957 42.482 14.687 3 2.368 0.728 3.007 0.011 10.062 10.849 16.874 42.483 12.958 平均 2.100 0.572 2.924 0.005 10.983 10.901 15.496 42.083 13.671 表 7 斜长石电子探针分析结果/%
Table 7. Electron probe analysis results on the Plagioclase
序号 FeO TiO2 Sc2O3 MgO CaO SiO2 Na2O K2O Al2O3 1 1.230 0.047 - 0.228 8.890 51.906 5.409 0.163 31.471 2 0.174 0.006 - 0.005 10.134 54.200 5.385 0.051 31.833 平均 0.702 0.0265 - 0.1165 9.512 53.053 5.397 0.107 31.652 表 8 单矿物化学分析结果/%
Table 8. Chemical analysis of key elements of pure minerals
样品 TiO2 TFe Sc2O3* 磁铁矿类 3.80 65.20 1.39 钛铁矿 47.89 36.73 50.00 角闪石类磁性矿物 2.69 11.38 136.00 长石类非磁性矿物 0.09 1.27 0.00 *单位为g/t。 表 9 矿石中钪金属量平衡配分结果
Table 9. Calculation results of scandium equilibrium in raw ore
矿物 矿物含量 Sc2O3含量/
(g/t)Sc2O3的配
分量/(g/t)Sc2O3分
布率/%磁铁矿 2.81 1.39 0.04 0.06 钛铁矿 6.80 50.00 3.40 5.01 电磁性脉石 47.39 136.00 64.45 94.93 非磁脉石 42.19 - 0.00 0.00 其他 0.81 - 0.00 0.00 合计 100.00 67.89 100.00 -
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