印尼塔里阿布岛Ⅱ区铁矿石中锡的工艺矿相学研究

Occurrence of Tin in Iron Ore from the Ⅱ Region of Taliabu, Indonesia

通过光学显微镜、X射线衍射分析、扫描电子显微镜和化学物相分析等多种研究手段对印尼塔里阿布岛Ⅱ区铁矿石中锡的赋存状态进行研究,查明了铁矿石中的锡主要以独立矿物(锡石、黑硼锡铁矿、硼钙锡石、水镁锡矿及水锡石)和类质同象的形式存在。其中水镁锡矿和水锡石是磁铁矿内呈包裹体产出的黑硼锡铁矿、硼钙锡矿因磁铁矿氧化分解暴露,逐渐转化反应而成。综合研究发现,在目前经济技术条件下,研究区含锡铁矿石试图通过原矿石选别回收利用的可能性较低,但其磁选后的尾矿,通过重选可以使锡显著富集在重矿物产品中进行回收利用。

By means of optical microscope, X-ray diffraction, scanning election microscopy and chemical phase analysis, the occurrence status of tin in iron ores from the Ⅱ Ore district of Taliabu, Indonesia, was studied. It shows that main styles of tin in iron ores are independent tin minerals （cassiterite, hulsite, nordeskioldine, schoenftiesite and varlamoffite） and tin in isomorphic forms. Among them, schoenfliesite and varlamoffite are transfromed from hulsite and nordeskioldine, which occurs in magnetite as inclusion, through weathering and oxidation. Comprehensive research shows that, under the condition of present economy technology, tin in tin-bearing iron ores in the study area has no recovery value. However, after gravity separation and the heavy mineral products being enriched with abvious tin, the trailing which has through magnetic separation has recovery value.