(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083)
摘 要: 以電鍍廢水處理過程中產(chǎn)出的電鍍污泥為研究對象，采用旋流電積技術(shù)從電鍍污泥中選擇性回收銅和鎳，并研究旋流電積過程中Cu2+和Ni2+以及雜質(zhì)離子的電積行為。結(jié)果表明：旋流電積技術(shù)可以從高雜質(zhì)含量的低銅浸出液中直接生產(chǎn)電積銅，產(chǎn)品質(zhì)量達(dá)到GB/T467—1997中Cu−CATH−2牌號標(biāo)準(zhǔn)陰極銅的要求，銅直收率達(dá)到99%以上；銅電積后液經(jīng)除鉻后，仍采用該技術(shù)從低鎳溶液中直接生產(chǎn)電積鎳，化學(xué)成分達(dá)到GB/T6516—1997中Ni9990牌號電積鎳的要求，鎳直收率達(dá)到93%以上。與傳統(tǒng)電積技術(shù)相比，旋流電積技術(shù)具有選擇性強(qiáng)、電流效率高和產(chǎn)品質(zhì)量好等優(yōu)點。
關(guān)鍵字: 旋流電積；電鍍污泥；銅；鎳
cyclone electrowinning
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The copper and nickel from electroplating sludge were selectively recovered by cyclone electrowinning technology, and the electrowinning behaviors of Cu2+, Ni2+ and other metal ions in the process were investigated. The results indicate that the electrolytic copper is electrodeposited from a leaching solution with high impurities and low copper content by cyclone electrowinning and meets the requirements of the standard GB/T467—1997, and more than 99% copper is recovered. After the removal of chromium, the liquor with low nickel content is applied to nickel cyclone electrowinning, and the product meets the requirements of the standard GB/T6516—1997 (Ni9990), and more than 93% nickel is recovered. Compared to the traditional electrowinning, the cyclone electrowinning shows the advantages of high selectivity of metals, high current efficiency and high purity of electrolytic product.
Key words: cyclone electrowinning; electroplating sludge; copper; nickel
