钨精矿预焙烧分离钨锡工艺研究  

Study on the Separation of Tungsten and Tin by Pre-roasting of Tungsten Concentrate

作　　者：聂华平[1] 王秀红[1] 万林生[1] 

机构地区：[1]江西理工大学材料与化学工程学院,江西赣州341000

出　　处：《稀有金属与硬质合金》2010年第2期1-4,61,共5页Rare Metals and Cemented Carbides

摘　　要：在分析SnO2和Cu2FeSnS4碱浸出热力学行为差异的基础上,研究了钨精矿焙烧预处理对锡浸出率的影响。研究表明,苛性钠浸出钨精矿时,SnO2极难浸出,浸出率接近为零,而Cu2FeSnS4的浸出率则高得多,在一般浸出条件下可高达40%~50%。钨精矿经过氧化焙烧后,可明显降低锡的浸出率,在焙烧温度为700~800℃、焙烧时间为2 h工艺条件下,Cu2FeSnS4所含硫化状态的锡就可完全转化为SnO2。锡的浸出率由5.96%下降至1.05%。Based on the analysis and investigation of SnO2 and Cu2FeSnS4＇s thermodynamic difference in caustic soda leaching,the influence of roasting pretreatment on the leaching ratio of tin was studied.Results show that in caustic soda leaching process,SnO2 is very hard to leach with leaching rate close to zero,while the leaching rate of Cu2FeSnS4 is much higher,which can reach 40%~50% under normal leaching conditions.Upon oxidization and roasting of the tungsten concentrate,the leaching ratio of stannum can be greatly reduced.At roasting temperature 700～800 ℃,roasting duration 2 h,the tin sulfides in Cu2FeSnS4 can be fully all converted into SnO2,and the leaching ratio of tin is reduced from 5.96% down to about 1%.

关 键 词：钨精矿 焙烧预处理 钨锡分离 锡浸出率 

分 类 号：TF803.2[冶金工程—有色金属冶金]