为了有效开发利用炭质页岩型钒矿资源并保护生态环境,提出了常压分段氧化浸出提钒新工艺,并以贵州某炭质页岩型钒矿石为对象进行了浸出试验.试验结果表明:在磨矿细度为-0.15 mm占70％,一段浸出1#药剂用量为矿石量的15％、液固比为0.75∶1、浸出温度为80℃、浸出时间为3h,二段浸出2#药剂用量为矿石量的3％、氯酸钠用量为矿石量的1％、液固比为1∶1、浸出温度为80℃、浸出时间为4h的条件下,钒的浸出率可达91.52％.该新工艺不需对矿石进行焙烧,工艺流程简单,药剂用量较低,浸出时间短,钒浸出率高,可避免焙烧提钒工艺带来的环境污染和资源浪费等问题.%In order to develop and utilize the mineral resources of navajoite of carbonaceous shale and protect the ecological environment effectively, the new process of segmented oxidation leaching for distill vanadium from navajoite of carbonaceous shale is presented, and the leaching experiment of a navajoite ore of carbonaceous shale in Guizhou was carried out The experiment results show that;the ore grinding fineness is 70% -0.15 mm, in the first stage leaching, the quantity of 1* reagent is 15% of the ore amount, the liquid-solid ratio is 0.75: 1, the leaching temperature is 80 ℃ , the leaching time is 3 h, In the second stage leaching, the quantity of 2# reagent is 3% of the ore amount, the quantity of sodium chlorate is 1 % of ore amount, the liquid-solid ratio is 1: 1, the leaching temperature is 80 ℃ , the leaching time is 4 h, the vanadium leaching rate can be up to 91. 52%. The original ore does not need to roast in this new process, the process flow is simple, the dosage of reagents is lower, the leaching time is shorter, the vanadium leaching rate is higher, and the problems of environmental pollution and resources-wasting in roasting navajoite leaching vanadium process could be avoided.
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