(攀鋼集團(tuán)研究院有限公司 釩鈦資源綜合利用國(guó)家重點(diǎn)實(shí)驗(yàn)室，攀枝花 617000)
摘 要: 采用輪碾機(jī)對(duì)釩渣和石灰石粉實(shí)施同步混磨，得到混磨混合料，并與攪拌混合的普通混合料相比較，考察兩種混合料的粒度分布、粉末形貌及混勻度，分析焙燒溫度和鈣釩比對(duì)不同預(yù)處理混合料焙燒轉(zhuǎn)化率的差異，研究混磨預(yù)處理對(duì)熟料酸浸過(guò)程初始pH值、酸耗及浸出時(shí)間的影響。結(jié)果表明：在相同的鈣釩比下，混磨預(yù)處理能顯著提高混合料的焙燒轉(zhuǎn)化率；鈣釩比為0.6時(shí)，混磨后的混合料在870 ℃下焙燒轉(zhuǎn)化率比普通混合料高約2%；在同一轉(zhuǎn)化率水平下，采用混磨預(yù)處理可降低石灰石用量，鈣釩比為0.4的混磨混合料在870 ℃下的焙燒轉(zhuǎn)化率為90.18%，與鈣釩比為0.6的常規(guī)混合料焙燒轉(zhuǎn)化率(90.76%)相當(dāng)；在酸浸過(guò)程中，混磨混合料經(jīng)焙燒所得熟料浸出初始pH值較常規(guī)熟料低，耗酸量減少約13%，且可縮短浸出時(shí)間。混磨預(yù)處理可以降低生產(chǎn)成本、提高生產(chǎn)效率，具有一定的應(yīng)用前景。
關(guān)鍵字: 混磨；鈣化提釩；轉(zhuǎn)化率
（State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, China）
Abstract:An experiment was designed to intensify the grinding and mixing of vanadium slag and limestone powder using a kind of wheel mill. The obtained material was compared with the ordinary mixture using agitation mixing method. The size distribution, powder morphology and mixing degree of two kinds of mixtures were investigated. The effects of calcination temperature and calcium vanadium ratio(m(CaO)/m(V2O5)) of the mixture on the roasting conversion were analyzed. The initial pH value, acid consumption and leaching time difference owing to agitation mixing during the leaching course were also studied. The results show that the mixed grinding pretreatment can significantly improve the roasting conversion of the mixture under the same calcium vanadium ratio. When the value of m(CaO)/m(V2O5) is 0.6, the calcination conversion of the mixture after mixed grinding at 870 ℃ is about 2% higher than that of the ordinary mixture. At the same conversion level, the amount of limestone can be reduced by using mixed grinding pretreatment. The calcination conversion of the mixed grinding mixture with m(CaO)/m(V2O5) of 0.4 at 870 ℃ is 90.18%, which is equivalent to 90.76% of the conventional mixture with m(CaO)/m(V2O5) of 0.6. During the acid leaching process, the initial pH value of the clinker obtained by roasting the mixed grinding mixture is lower than that of the conventional clinker, the acid consumption is reduced by about 13%, as well as the leaching time can be significantly shortened. The mixed grinding pretreatment can reduce the production cost and improve the production efficiency, which has a certain application prospect.
Key words: mixed grinding; vanadium extraction by calcination; immersion rate
