硫化铋精矿低温碱性熔炼新工艺研究  

Study on a New Process for Alkalline Smelting Bismuth Sulfide Concentrate at Low Temperature

作　　者：肖剑飞[1] 唐朝波[1] 唐谟堂[1] 陈永明[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《矿冶工程》2009年第5期82-85,共4页Mining and Metallurgical Engineering

基　　金：国家重大支持项目子课题(2006BAD02B05-04-01/02);国家自然科学基金资助项目(50504016)

摘　　要：提出了硫化铋精矿低温碱性熔炼粗铋的新工艺,考察了w(NaOH)/w(Na2CO3)、碱量、温度和时间等因素对熔炼的影响。结果表明,在w(NaOH)/w(Na2CO3)=20/133、碱量为1.64倍理论量、温度800℃、时间1.5 h的最优条件下,金属铋的直收率可达94.02%,粗铋含B i 98%,该工艺具有低温、清洁、直收率高等特点。A new process for alkaline smelting bismuth sulfide concentrate into rude bismuth at low temperature was proposed. The effects of w（ NaOH）/w（ Na2CO3 ）, the dosage of alkali, temperature and time on smelting were investigated. The results indicate that on the optimum conditions that w（ NaOH）/w（ N%CO3 ） is 20/133, the dosage of alkali is 1.64 times of the theoretical value and 800 ℃ for 1.5 h, the direct recovery of metal bismuth and the content of bismuth in rude bismuth can reach 94.02% and 98% respectively. The process has the advantages of low temperature, cleanness and high direct recovery.

关 键 词：硫化铋精矿 低温碱性熔炼 铋冶金 苏打 

分 类 号：TF111[冶金工程—冶金物理化学]