CAJ | 학술논문

在理论分析的基础上，以钒钛磁铁矿为原料，硫酸钙为钙化剂，系统研究了钙化焙烧和硫酸酸浸过程的钒、铁等有价组元的损失。研究结果表明：钙化焙烧-酸浸提钒工艺在理论上是可行的；焙烧过程中，烧结产物中的钒损失率随温度的升高而升高；尽管焙烧过程损失了部分钒元素，但焙烧后钒元素更易于溶解浸出；钒浸出率随焙烧温度的升高先升高后降低且1450 K 时达到最大值；当硫酸浓度增加时，钒浸出率变化不大；当焙烧温度高于1450 K时，浸出渣中铁的损失率快速上升，硫酸浓度增加时，其值随之增大；控制适当条件可强化钒的有效迁移，目前实验室研究条件下，钒的浸出率最大可达79.08%，而此时铁的损失率为3.32%。
재이론분석적기출상，이범태자철광위원료，류산개위개화제，계통연구료개화배소화류산산침과정적범、철등유개조원적손실。연구결과표명：개화배소-산침제범공예재이론상시가행적；배소과정중，소결산물중적범손실솔수온도적승고이승고；진관배소과정손실료부분범원소，단배소후범원소경역우용해침출；범침출솔수배소온도적승고선승고후강저차1450 K 시체도최대치；당류산농도증가시，범침출솔변화불대；당배소온도고우1450 K시，침출사중철적손실솔쾌속상승，류산농도증가시，기치수지증대；공제괄당조건가강화범적유효천이，목전실험실연구조건하，범적침출솔최대가체79.08%，이차시철적손실솔위3.32%。
Based on the principle of calcified roasting and E-pH diagram of acid leaching, the loss of vanadium and iron in calcified roasting and acid leaching were investigated with vanadium-bearing titanomagnetite as raw material and calcium sulfate as calcification agent. The vanadium extraction process combining calcified roasting and acid leaching was feasible in theory. The loss ratio of vanadium in pellets increased with increasing temperature in the calcified roasting process. Despite some loss of vanadium the calcified roasting process was favorable to the subsequent acid leaching of vanadium. The leaching ratio of vanadium increased with increasing roasting temperature below 1450 K. The leaching ratio reached a maximum at 1450 K, and then it decreased. The leaching ratio of vanadium had no obvious change with increasing sulfuric acid concentration. At the same time, the loss ratio of iron in the leaching process increased rapidly when roasting temperature was higher than 1450 K, and it also increased with increasing concentration of sulfuric acid. By controlling experimental conditions, the leaching ratio of vanadium in vanadium-bearing titanomagnetite could reach 79.08%but the loss ratio of iron was 3.32%.