江西宜春某富锡铌钽粗精矿工艺矿物学研究

Process Mineralogy of a Coarse Tin-rich Niobium-Tantalum Concentrate in Yichun,Jiangxi

以江西宜春某富锡铌钽粗精矿为研究对象,为进一步分离回收铌钽和锡,采用X射线荧光光谱分析(XRF)和矿物自动分析系统(AMICS)详细分析该样品元素和矿物组成、矿物赋存状态等工艺矿物学特征。结果表明,样品Ta_(2)O_(5)含量为18.05%,Nb_(2)O_(5)含量为9.95%,SnO_(2)含量为45.35%,主要矿物组成为铌钽铁矿、锡石、磁铁矿及硫碲铋矿等。铌、钽元素主要以铌钽铁矿形式存在,含量为38.44%;锡以锡石形式存在,含量为47.35%。铌钽铁矿和锡石在矿石中以单晶体半自形团块状及交代共生型不规则粒状产出,均与磁铁矿存在密切的共生、包裹关系。铌钽铁矿单体解离度50.39%,锡石单体解离度73.34%,解离度级别均主要分布在80%~100%。铌钽铁矿和锡石单矿物粒度均集中分布在26.52~89.19μm,在此区间的累积占有率分别为81.49%和85.99%。基于矿石矿物特性,建议采用浮选法通过高效捕收剂和活化剂、抑制剂的组合使用实现矿物的回收利用。

Taking a tin-rich niobium-tantalum crude concentrate in Yichun,Jiangxi province as the research object,in order to further separate and recover niobium,tantalum and tin,X-ray fluorescence spectroscopy(XRF)and automatic mineral analysis system(AMICS)were used to analyze in detail the element and mineral composition of the sample.Process mineralogical characteristics such as the occurrence state of minerals.The results showed that the sample Ta_(2)O_(5) content was 18.05%,Nb_(2)O_(5) content was 9.95%,SnO_(2) content was 45.35%,the main mineral composition was niobium tantalite,cassiterite,magnetite and bismuth sulfide tellurite.Niobium and tantalum mainly existed in the form of niobium tantalite with a content of 38.44%,and tin existed in the form of cassiterite with a content of 47.35%.Columbium tantalite and cassiterite were produced in the ore in the form of single crystal semi-automatic agglomerates and metasomatous symbiosis irregular granular shapes,both of which had a close symbiotic and encapsulation relationship with magnetite.The dissociation degree of niobium tantalite monomer was 50.39%,the dissociation degree of cassiterite monomer was 73.34%,and the dissociation degree levels were mainly distributed in the range of 80%-100%.The particle sizes of niobium tantalite and cassiterite single minerals are concentrated in the range of 26.52-89.19μm,and the cumulative occupancy rates in this interval were 81.49% and 85.99%,respectively.Based on the characteristics of the ore and minerals,it was recommended to use the flotation method to realize the recovery and utilization of minerals through the combined use of high-efficiency collectors,activators and inhibitors.