从某高温合金酸浸渣中回收钨的研究.pdf

从某高温合金酸浸渣中回收钨的研究①吴永谦, 吴 贤, 马 光(西北有色金属研究院,陕西西安 710016)摘 要: 以某高温合金酸浸渣为原料,利用碱焙烧水浸离子交换结晶工艺回收钨制备仲钨酸铵。考察了焙烧温度、焙烧时间、碱用量、水浸温度及水浸时间等因素对钨回收率的影响。实验得出最佳碱焙烧水浸工艺条件为:焙烧温度 700 ℃、焙烧时间 60 min、碱用量为酸浸渣质量的 80%、水浸温度 85 ℃、水浸时间 60 min,在此条件下,富钨渣中钨回收率可达 99%以上。将焙烧水浸液稀释后,采用 201×7 树脂在流速为 5 cm/ min 的条件下进行吸附,吸附完毕后使用 5 mol/ L NH4 Cl+2 mol/ L NH3 H2 O 进行解吸,解吸流速为吸附流速的 1/ 2,取解吸高峰液进行结晶,当结晶率 80%时仍可得到合格的仲钨酸铵产品。关键词: 酸浸渣; 钨; 钽; 铪; 焙烧; 水浸; 离子交换; 仲钨酸铵中图分类号: 文献标识码: A doi:/ -: 0253-6099(2014)06-0101-04Tungsten Recovery from the Residue after Acid Leaching of SuperalloyWU Yongqian, WU Xian, MA Guang(Northwest Institute for Nonferrous Metal Research, Xi′an 710016, Shaanxi, China)Abstract: Tests on recovering tungsten from tungstenrich residue left after acid leaching of superalloy was conducted bythe process of alkali roastingwater leachingion exchangecrystallization. Effects of temperature and time for roasting,NaOH dosage, temperature and time for water leaching on the tungsten recovery was investigated. In the test, the roastingprocess at 700 ℃ for 60 min with NaOH dosage 80% of the mass of residue, which is followed by a water leaching processat 85 ℃ for 60 min, resulted in the recovery of tungsten higher than 99%. The final leachate, after being diluted, wassubjected to an adsorption process with 201×7 resin at a flow rate of 5 cm/ min, followed by a desorption process by