南阳夕线石矿工艺矿物学特征及选矿试验

Process Mineralogy Characteristics and Mineral Processing Technology of Sillimanite Ore from Nanyang Area,China

采用化学分析、偏光显微镜和X射线衍射分析等测试手段对河南南阳夕线石矿的工艺矿物学进行系统研究,查明了矿石矿物组成、夕线石嵌布特征及有害元素赋存状态。结果表明,该夕线石矿风化程度高,含泥量大,有害元素Fe_2O_3含量高,去除难度大。在工艺矿物学基础上,采用选择性磨矿→脱泥→磁选→一粗一扫三精中矿集中返回的闭路流程处理矿石,获得了品位为89.11%的夕线石精矿,夕线石回收率达到51.41%且精矿理化性能达到了我国行业标准(YB/T 4032-2010)中GP-54级标准。

This paper presents a detailed study on process mineralogy of sillimanite ore from Anyang Area, China by using optical microscopy, X-ray diffraction analysis and chemical analysis. Results reveal material composition, main embedded mineral features and existing occurrence of major detrimental elements. Results show high weathering degree of the ore and being difficult to remove detrimental Fe2O3 and TiO2.Based on the characteristics of the process mineralogy of sillimanite ore, a closed circuit test of one stage of roughing, one stage of cleaning and three stages of scavenging were adopted to treat the sillimanite ore. The grade of sillimanite concentrate was 89. i1%, representing a gain of 51.41% of sillimanite recovery and 51.62% of Al2O3 recovery. The physicochemical properties of sillimanite concentrate reach the grade of GP-54 based on YB/T 4032-2010national industry standard.