(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083)
摘 要: 對國內(nèi)某電解錳廠含鉛量高的陽極渣進(jìn)行了回收錳的實驗研究。實驗采用葡萄糖作還原劑在硫酸體系中還原浸出電解錳陽極渣。通過基于中心復(fù)合設(shè)計的響應(yīng)曲面法對浸出溫度、硫酸用量和葡萄糖用量的工藝參數(shù)進(jìn)行研究并優(yōu)化。研究表明：溫度對錳浸出率的影響最顯著，葡萄糖的次之，硫酸的最小；硫酸對鉛浸出率影響最顯著，溫度的次之，而葡萄糖則幾乎沒有影響。在浸出溫度80 ℃，葡萄糖與錳陽極渣質(zhì)量比為0.175:1、酸渣質(zhì)量比為0.8:1的條件下，錳的浸出率可達(dá)93.22%，鉛的浸出率僅為0.39%，錳、鉛分離效果明顯，錳陽極渣浸出前后的物相通過X射線衍射儀進(jìn)行表征。實驗證明：在硫酸體系中利用葡萄糖還原浸出電解錳陽極渣的方法是可行的。
關(guān)鍵字: 電解錳陽極渣；響應(yīng)曲面法；中心復(fù)合設(shè)計；葡萄糖；還原浸出
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The present study was carried out for the recovery of manganese by using lead-rich manganese anode slag from electrolytic manganese plant. Glucose and sulfuric acid were used as reductant and leaching solvent for reductive leaching of manganese anode slag. The effect of important parameters, such as temperature, sulfuric acid and glucose concentration, was investigated and the process conditions were optimized using response surface methodology (RSM) based on central composite design (CCD). The results show that the effect of temperature on the manganese leaching yield is the most significant, the effect of glucose concentration is second, and the effect of sulfuric acid concentration is minimum. At the meantime, the effect of sulfuric acid concentration on the lead leaching yield is the most significant, followed by the effect of temperature, while glucose almost has no effect. The leaching yield of Mn reaches 93.22%, while the extraction of Pb is only 0.39% under the conditions of leaching temperature 80 ℃, the mass ratio of glucose to slag 0.175:1 and the mass ratio of acid to material 0.8:1. The samples were characterized before and after leaching using X-ray diffraction (XRD). The results show that manganese is extracted from anode slag in sulfuric acid using the glucose as reductant proved highly effective.
Key words: manganese anode slag; response surface methodology; central composite design; glucose; reductive leaching
