含铍冶炼废渣回收铍生产氟化镁  

Recovery of Beryllium and Production of Magnesium Fluoride from Beryllium-containing Smelting Slag

作　　者：曾志彦 王磊[2,3] 孔令兵 成泉辉 郭培民 ZENG Zhi-yan;WANG Lei;KONG Ling-bin;CHENG Quan-hui;GUO Pei-min(China Minmetals Beryllium Co.,Ltd.,Hengyang 421513,Hunan,China;State Key Laboratory of Advance Steel Process and Products,Central Iron and Steel Research Institute,Beijing 100081,China;CISRI Sunward Technology Co.,Ltd.,Beijing 100081,China)

机构地区：[1]五矿铍业股份有限公司,湖南衡阳421513 [2]钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081 [3]钢研晟华科技股份有限公司,北京100081

出　　处：《有色金属（冶炼部分）》2022年第7期144-149,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2021YFC2902301,2021YFC2902305,2018YFC1900601)。

摘　　要：为了解决含铍冶炼废渣的堆放,回收其中的铍镁资源,采用酸浸—重选—煅烧工艺处理含铍废渣,重点对酸浸工序的关键工艺参数进行了详细研究。结果表明,采用氢氟酸浸出含铍冶炼废渣最优条件为:液固比2.5 mL/g、酸浓度18%、浸出温度85℃、浸出时间6 h,冶炼废渣中铍的浸出率可达到89%,残渣中的铍含量为0.05%。为进一步提高渣中铍的浸出率,采用二次逆流氢氟酸浸出,铍的综合回收率可以达到97%以上,残渣中的铍含量可降至0.012%。经过浮选、煅烧,可得到MgF_(2)含量大于98%、Be含量小于0.01%的优质产品。采用冶金—选矿—煅烧联合方法是可行的,一方面回收渣中的残留铍,另一方面又能生产出合格的氟化镁产品。In order to solve the accumulation of beryllium-containing smelting slag and recover beryllium and magnesium resources,the beryllium-containing slag was treated by acid leaching,gravity separation,and calcination.The key parameters of acid leaching process were studied in detail.The results show that leaching rate of beryllium from beryllium containing smelting waste residue by hydrofluoric acid is 89% and beryllium content in residue is 0.05% under the optimum leaching conditions including L/S of 2.5 mL/g,acid concentration of 18%,leaching temperature of 85℃,and leaching time of 6 h.In order to improve leaching rate of beryllium in slag,secondary countercurrent hydrofluoric acid leaching was used.The results show that the comprehensive recovery of beryllium is 97% above and beryllium content in residue can be reduced to 0.012%.After gravity separation and calcination,high quality products with MgF_(2) content of 98% above and beryllium content of 0.01% below can be obtained.It is feasible to adopt the combined method of smelting,separation and calcination,which can not only recover the residual beryllium in slag,but also produce qualified MgF_(2) products.

关 键 词：冶炼废渣 铍 氢氟酸 重选 石墨 氟化镁 

分 类 号：X758[环境科学与工程—环境工程]