(1. 中南大學(xué) 冶金與環(huán)境學(xué)院，長沙 41008 3；2. 資興市鴻錦冶金有限公司，郴州 423400)
摘 要: 以鎢渣高溫還原熔煉所得的鐵鎢錫合金粉為原料，通過電解的方法回收其中的鐵，研究了Fe2+濃度、pH值、溫度和電流密度對電流效率及電解鐵純度的影響。結(jié)果表明：在電流密度300 A/m2、溫度45 ℃、pH=4.5、Fe2+濃度100 g/L的優(yōu)化工藝條件下，電流效率為92.1%，電解鐵純度為99.1%；在優(yōu)化工藝條件下進(jìn)行了連續(xù)4天的電解實(shí)驗(yàn)，平均電流效率為87.8%，電解鐵純度在97%以上，陽極泥里鎢、錫含量(質(zhì)量分?jǐn)?shù))分別為19.7%和20.0%，相對于原料中的鎢、錫含量(6.98%，6.91%)分別富集了2.82倍和2.89倍；鐵的回收率為92.2%，陽極泥產(chǎn)率為33.0%，噸鐵電能消耗為4757 kW·h。SEM像表明電解鐵呈不規(guī)則棒狀。
關(guān)鍵字: 鐵鎢錫合金粉；電解；電解鐵；電流效率
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. Zixing Hongjin Metallurgy Co., Ltd., Chenzhou 423400,China）
Abstract:The Fe-W-Sn alloy powders obtained by high-temperature reduction and smelting process of tungsten residue, as raw material, were electrolyzed to recover iron. And the effects of Fe2+ concentration, pH values, temperature and current density on current efficiency and purity of electrolytic iron were investigated. The results show that, under the optimal conditions of current density 300 A/m2, temperature 45 ℃, pH 4.5, and Fe2+ concentration 100 g/L, the current efficiency and purity of the electrolytic iron are 92.1% and 99.1%, respectively. The average current efficiency is 87.8% and the purity of electrolytic iron is above 97% after continuous electrolysis for 4 days under the optimal conditions. The contents of tungsten and tin in the anode slime are 19.7% and 20.0%, which are enriched 2.82 times and 2.89 times compared with the tungsten and tin contents of the raw materials(6.98% and 6.91%), respectively. Meanwhile, the recovery rate of iron is 92.2%, the anode slime yield is 33.0% and the power consumption for producing 1 t of electrolytic iron is 4757 kW·h. The SEM image shows that the morphology of electrolytic iron is irregular-shaped stick.
Key words: Fe-W-Sn alloy powder; electrolysis; electrolytic iron; current efficiency
