(1. 重慶科技學(xué)院 冶金與材料學(xué)院，重慶 401331；
2. 重慶大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400044；
3. 重慶大學(xué) 釩鈦冶金及新材料重慶市重點(diǎn)實(shí)驗(yàn)室，重慶 400044)
摘 要: 針對(duì)轉(zhuǎn)爐釩渣鈣化焙燒酸浸工藝中存在的釩轉(zhuǎn)浸率低的問(wèn)題，采用高能球磨對(duì)釩渣進(jìn)行活化預(yù)處理，以期強(qiáng)化其提釩效果。采用激光粒度分析儀、BET比表面積測(cè)定儀和XRD對(duì)活化前后釩渣進(jìn)行了粒度、比表面積及物相結(jié)構(gòu)分析；采用浸出實(shí)驗(yàn)研究了機(jī)械活化對(duì)鈣化焙燒和浸出的影響規(guī)律。結(jié)果表明：機(jī)械活化法增大了釩渣的比表面積，增加了晶格畸變與微觀應(yīng)力，使含釩物相充分解離，由此可改善釩渣鈣化焙燒的動(dòng)力學(xué)條件。在浸出20 min條件下，機(jī)械活化80 min可將釩浸出率提高10%，最佳焙燒溫度降低100 ℃。
關(guān)鍵字: 釩渣；機(jī)械活化；鈣化焙燒；酸浸；浸出率
（1. College of Materials and Metallurgical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China;
2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
3. Chongqing Key Laboratory of Vanadium-titanium Metallurgy and Advanced Materials, Chongqing University, Chongqing 400044, China）
Abstract:In order to account the fact that the extraction of vanadium from vanadium-bearing converter slag by calcification roasting-acid leaching process is limited, an attempt was exploited for improving the extraction of vanadium with high energy ball milling pretreatment. The particle size distribution, specific surface area and phase transformation of the vanadium slag before and after activation were investigated by laser diffraction particle size analyser, micro-pore physisorption analyser, and XRD, respectively. The effects of mechanical activation on the calcification roasting and leaching were also investigated. The results demonstrate that the mechanical activation significantly increases the specific surface area, lattice distortion, and microscopic stress of the vanadium slag, and reduces the particle size, thus improves the kinetic conditions of the calcification roasting. Under the condition of leaching for 20 min, the leaching efficiency of vanadium can be increased by 10% by mechanical activation for 80 min, and the optimal roasting temperature can be reduced by 100 ℃.
Key words: vanadium slag; mechanical activation; calcification roasting; acid leaching; leaching fraction
