悬浮焙烧法强化从难选石煤中提取钒  

Improving vanadium extraction from refractory stone coal by suspension roasting

作　　者：袁帅[1,2] 秦永红 金永鹏 李艳军 Shuai YUAN;Yong-hong QIN;Yong-peng JIN;Yan-jun LI(College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,沈阳110819 [2]难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,沈阳110819

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第3期902-916,共15页中国有色金属学报（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities (No. N2101023);the National Key Research and Development Program of China(No. 2018YFC1901901902);the National Natural Science Foundation of China (Nos. 51904058, 52104247, 52130406);the Open Foundation of State Key Laboratory of Mineral Processing, China (No. BGRIMM-KJSKL-2020-17)。

摘　　要：提出一种难选石煤在空气气氛下悬浮焙烧-酸浸强化的提钒新技术。在焙烧温度为800℃、焙烧时间为20 min、气体流量为400 m L/min的条件下钒的浸出率从过去的20%提高到目前技术的47.14%。在焙烧过程中,石煤表面逐渐变得粗糙和不规则,颗粒比表面积增加,硅酸盐矿物的片状结构被破坏,促进了钒的释放。同时,石煤中的钒被氧化为V(Ⅴ)或V(Ⅳ)。结果表明,由于悬浮焙烧过程中钒的释放和转化,因此,其浸出率得到了提高。An innovative suspension roasting−leaching technology in the atmosphere was proposed to improve the vanadium extraction from refractory stone coal.The leaching rate of vanadium was enhanced from 20%previously to 47.14%by present technology at a roasting temperature of 800℃,a roasting time of 20 min,and a gas flow rate of 400 mL/min.Throughout the suspension roasting process,the surface of the stone coal gradually became rough and irregular.The specific surface area of the particles increased and the lamellar structure of the silicate minerals was destroyed,contributing to the release of vanadium.Meanwhile,the vanadium in the stone coal was oxidized to V(Ⅴ) or V(Ⅳ).The results indicated that the leaching rate was improved owing to the release and transformation of vanadium in the suspension roasting.

关 键 词：石煤 钒 悬浮焙烧 浸出 矿相重构 显微组织 

分 类 号：TF841.3[冶金工程—有色金属冶金]