低品位废料中回收铂和铑的工艺研究
Research on the Process of Recovering Platinum and Rhodium from Low-Grade Waste
张帆 1王芳 1解雪 1李梅 1闫珂1
作者信息
- 1. 江苏北矿金属循环利用科技有限公司,江苏 徐州 221006
- 折叠
摘要
玻璃纤维厂产出的废耐火砖经选矿回收后,尾矿仍含有一定量的铂和铑.试验对尾矿进行加压酸浸处理,以期从低品位废料中回收铂和铑.在最佳浸出工艺条件下,耐火砖用量为 100 g,液固比为 5∶1,硫酸用量为 55 g,氯化钠用量为 40 g,硝酸钠用量为 25 g,反应温度为 200℃,系统压强为 1.6 MPa,反应时间为 4 h,铂的浸出率可达 66.51%,铑的浸出率可达 57.69%.试验结果表明,采用氯化钠+硝酸钠+硫酸体系处理该类型低品位废料,可实现铂和铑的高效浸出,该工艺具有较好的应用前景.
Abstract
After the waste refractory bricks produced by the fiberglass factory are recycled through beneficiation,the tailings still contain a certain amount of platinum and rhodium.Experiments are conducted on pressurized acid leaching of tailings to recover platinum and rhodium from low-grade waste.Under the optimal leaching process conditions,the amount of refractory brick is 100 g,the liquid-solid ratio is 5∶1,the amount of sulfuric acid is 55 g,the amount of sodium chloride is 40 g,the amount of sodium nitrate is 25 g,the reaction temperature is 200℃,the system pressure is 1.6 MPa,and the reaction time is 4 h,the leaching rate of platinum can reach 66.51%,and the leaching rate of rhodium can reach 57.69%.The experimental results show that using a system of sodium chloride+sodium nitrate+sulfuric acid to treat this type of low-grade waste can achieve efficient leaching of platinum and rhodium,and this process has good application prospects.
关键词
低品位废料/铂/铑/回收/耐火砖/尾矿/加压浸出Key words
low-grade waste/platinum/rhodium/recycling/refractory bricks/tailings/pressure leaching引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据