(1. 沈陽航空航天大學 材料科學與工程學院，沈陽 110136；
2. 中國科學院金屬研究所，沈陽 110016)
摘 要: 廢舊電路板是一種物理結構和化學組成復雜的固體廢物，蘊藏豐富的有價金屬資源。本文以廢舊電路板中處理難度較大的內(nèi)存條為對象，開展廢舊內(nèi)存條(WMM)低溫熔融混堿(MH)處理回收研究，考察溫度、時間、物料比等工藝參數(shù)對內(nèi)存條非金屬與金屬解離的影響，探討了熔融堿處理過程中內(nèi)存條非金屬(溴化環(huán)氧樹脂、玻璃纖維等)的降解機理。研究發(fā)現(xiàn)，當溫度為400 ℃、堿與內(nèi)存條物料比mMH/mWMM為5時，在反應釜中持續(xù)反應60 min后，內(nèi)存條中非金屬物料的降解率可達95.45%，最終獲得由Cu、Fe、Ni及貴金屬Au、Ag等組成的混合多金屬產(chǎn)物。
關鍵字: 金屬回收、廢舊電路板、廢舊內(nèi)存條、熔堿處理
（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
