白钨矿物相组成对浸出率的影响  

Effects of Scheelite Phase Composition on Leaching Rates

作　　者：刘建华[1] 彭瑛[2] 张淑英[1] 沈志农[1] 

机构地区：[1]湖南工业大学冶金工程学院,湖南株洲412008 [2]湖南工业大学土木工程学院,湖南株洲412008

出　　处：《湖南工业大学学报》2010年第3期1-4,共4页Journal of Hunan University of Technology

摘　　要：针对白钨精矿苛性钠浸出率进行了研究。通过对2种典型白钨精矿(A,B矿)进行高温高压碱性浸出试验,探讨了白钨精矿的浸出率不稳定的原因。由A,B矿的SEM,XRD,XRF分析结果得知,二者的矿相结构基本相同但元素组成不同。B矿中含有黄铁矿其矿石表面油脂光滑,而A矿不含有黄铁矿其矿石表面呈疏松状。在试验条件相同的情况下,A,B矿的浸出率分别为98.4%和66.4%。对钨渣进行SEM,XRD分析,得知A矿中白钨矿反应完全,B矿中的白钨矿未反应完全,仍以原形态存在于渣中。研究结果表明:因为黄铁矿的存在,造成了矿石表面油脂光滑,使得碱液不易进入白钨矿石内部,不利于矿物的浸出。Studies the leaching rates of NaOH for scheelite.Through high temperature and high pressure alkaline leach-ing tests on two types scheelite（A and B）,investigates the instability cause of the leaching rate of scheelite.The analytical results from SEM,XRD and XRF show that A and B scheelite have basically the same phase structure,but different elemental composition.B ore contains pyrite ore with oily smooth surface,while A ore contains no pyrite and has loose surface.Under the same experiment,A and B scheelite have leaching rates of 98.4 % and 66.4 % respectively.The analytical results from SEM and XRD of the tungsten residue show that the scheelite of A ore decomposes completely,while B ore doesn＇t and the original form still exists in the slag.The research shows that the oily smooth surface of B scheelite is due to the presence of pyrite,which makes lye difficult to access scheelite interior and prevent mineral leaching.

关 键 词：白钨矿 物相分析 碱压煮 

分 类 号：TF804.3[冶金工程—有色金属冶金]