(1. 沈阳航空航天大学 材料科学与工程学院，沈阳 110136；
2. 中国科学院金属研究所，沈阳 110016)
摘 要: 废旧电路板是一种物理结构和化学组成复杂的固体废物，蕴藏丰富的有价金属资源。本文以废旧电路板中处理难度较大的内存条为对象，开展废旧内存条(WMM)低温熔融混碱(MH)处理回收研究，考察温度、时间、物料比等工艺参数对内存条非金属与金属解离的影响，探讨了熔融碱处理过程中内存条非金属(溴化环氧树脂、玻璃纤维等)的降解机理。研究发现，当温度为400 ℃、碱与内存条物料比mMH/mWMM为5时，在反应釜中持续反应60 min后，内存条中非金属物料的降解率可达95.45%，最终获得由Cu、Fe、Ni及贵金属Au、Ag等组成的混合多金属产物。
关键字: 金属回收、废旧电路板、废旧内存条、熔碱处理
（1. School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136, China;
2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China）
Abstract:The printed waste circuit boards(WPCBs) are not only kind of solid waste with complicated physical structure and chemical composition, but also some resources rich in valuable metals. The recycling of waste memory modules (WMMs), which is the most difficult to deal with among WPCBs, was investigated in the present work. The effects of temperature, time and material ratio on the dissociation of the non-metals and metals in WMMs were analyzed. The degradation mechanism of the non-metallic parts in WMMs (brominated epoxy resin, fiber glass, etc.) during molten-alkali treatment was proposed from the thermodynamic viewpoint. The results show that the degradation rate of non-metallic materials in WMMs can reach 95.45% if the reaction is continuously kept at 400 ℃ for 60 min in the reaction kettle with the mass ratio of mixture of hydroxides to WMM (mMH/mWMM)of 5. The obtained metal mixture contains the elements Cu, Fe, Ni and precious metals Au and Ag.
Key words: metal recycling; waste printed circuit boards; waste memory modules; molten alkali
