CAJ | 학술논문

湖北某石煤矿石V2 O5品位为0．72%,钒主要赋存在白云母等铝硅酸盐矿物中。为了低耗、高效提取其中的钒,对粒度为0．45~1 mm的试样进行了静态和流态化焙烧对比试验。结果表明,在较低的焙烧温度和较短的焙烧时间情况下,流态化焙烧可以取得较理想的焙烧效果,在750℃下流态化焙烧15 min,钒浸出率可达83．52%；在800℃下静态焙烧60 min,钒浸出率为74．93%。对焙烧产物的XRD和SEM分析表明：焙烧可以改善石煤浸钒效果的主要原因在于,焙烧可以破坏石煤中白云母的结构,将以类质同象形式赋存在白云母晶格中的钒释放出来,为酸性浸出液进入焙烧产物内部并浸出钒创造了条件。因此,流态化焙烧是改善石煤浸钒效果的低耗、高效手段。
호북모석매광석V2 O5품위위0．72%,범주요부존재백운모등려규산염광물중。위료저모、고효제취기중적범,대립도위0．45~1 mm적시양진행료정태화류태화배소대비시험。결과표명,재교저적배소온도화교단적배소시간정황하,류태화배소가이취득교이상적배소효과,재750℃하류태화배소15 min,범침출솔가체83．52%；재800℃하정태배소60 min,범침출솔위74．93%。대배소산물적XRD화SEM분석표명：배소가이개선석매침범효과적주요원인재우,배소가이파배석매중백운모적결구,장이류질동상형식부존재백운모정격중적범석방출래,위산성침출액진입배소산물내부병침출범창조료조건。인차,류태화배소시개선석매침범효과적저모、고효수단。
A stone coal from Hubei Province contains 0. 72% V2 O5 . The vanadium mainly occurs in aluminum silicate minerals like muscovite. In order to efficiently extract the vanadium from stone coal with low energy consumption,comparison tests of fluidized roasting&static roasting were conducted on the ore,with particle size from 0. 45 to 1 mm. The results indica-ted that,fluidized roasting can obtain ideal index in low roasting temperature with short time. The leaching rate of vanadium is 83. 52% when fluidized roasting at 750℃ for 15 min and is 74. 93% when static roasting at 800℃ for 60 min. XRD and SEM analysis of roasted products showed that main reason for better performance of vanadium extraction by roasting is that roasting can destroy the structure of muscovite,liberate the vanadium from white mica crystal lattice,and make it possible on acid leac-hing liquid get into the interior of muscovite and make extraction more easily. Therefore,fluidized roasting can highly improve vanadium extraction effect with low consumption.