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波兰发现一个碳质粘土页岩矿床,矿石中含1600ppm 钒、100ppm 铀和180ppm 钼。实验室试验表明,页岩中的钒和铀是难浸的,用稀硫酸或稀碳酸钠溶液浸出时,钒和铀的浸出率都不高。但用浓硫酸熟化法(250℃)处理可浸出70%的钒、65%的铀。用碱可直接从页岩或酸浸渣中浸出70%的钼。酸浸液含大量的铝和铁,在用溶剂萃取法分离铀、钒之前,应先将铝和铁除掉一部分。试验证明,用结晶法可以得到铁-铝硫酸盐付产品,用胺类萃取剂可从结晶后的溶液中回收铀和钒。
Poland found a carbonaceous clay shale deposit containing 1600 ppm vanadium, 100 ppm uranium and 180 ppm molybdenum. Laboratory tests show that vanadium and uranium in shale are difficult to leach and that vanadium and uranium leaching rates are not high when leached with dilute sulfuric acid or dilute sodium carbonate. However, the treatment with concentrated sulfuric acid maturation (250 ℃) can leach 70% of vanadium, 65% of uranium. With base, 70% molybdenum can be leached directly from shale or acid leach. Acid leachate contains a large amount of aluminum and iron, before the solvent extraction of uranium, vanadium, aluminum and iron should be removed before part. Experiments show that the crystallization method can be iron-aluminum sulfate to pay the product, with amine extractant from the crystallization of the solution recovery of uranium and vanadium.