為了提高轉(zhuǎn)爐釩渣提釩回收率,提出鈣鎂復(fù)合焙燒-酸浸提釩新工藝,研究MgO/(CaO+MgO)摩爾比、焙燒和浸出工藝參數(shù)對(duì)釩回收率的影響。結(jié)果表明:當(dāng)焙燒添加劑CaO完全被MgO取代時(shí),釩浸出率降低,由88%降至81%;然而,采用CaO/MgO復(fù)合焙燒卻能強(qiáng)化釩的浸出。當(dāng)MgO/(CaO+MgO)的摩爾比為0.5:1時(shí),釩浸出率達(dá)到94%。XRD和SEM-EDS結(jié)果表明,CaO/MgO復(fù)合焙燒添加劑能強(qiáng)化焙燒過程中可溶性釩酸鹽的生成,并通過減少硫酸鈣沉淀的生成改善浸出過程的動(dòng)力學(xué)條件。

【文章頁數(shù)】：10 頁

【文章目錄】：
1 Introduction
2 Experimental
    2.1 Materials
    2.2 Procedure
    2.3 Characterization
3 Results and discussion
    3.1 Roasting
        3.1.1 Mg O/(Ca O+Mg O) molar ratio
        3.1.2 Roasting temperature
        3.1.3 Roasting time
    3.2 Leaching
        3.2.1 Leaching temperature
        3.2.2 Liquid/solid ratio
        3.2.3 Particle size
        3.2.4 Acidity
    3.3 Characterization of products
4 Conclusions



本文編號(hào)：4047602