In this work; the carnotite sample assaying 3.063%U and 2.142%V was subjected to a roasting step before successive vanadium and uranium leaching. The sample was roasted firstly with Na2SO4 followed by quenching the clinker with water for vanadium dissolution. Under the optimized roasting conditions the vanadium dissolution efficiency attained 89.5%. The obtained solution was then treated with NH4Cl to precipitate the vanadium species as NH4VO3. Secondly, the remained residue was treated with carbonate-bicarbonate solution in presence of H2O2 to leach the uranium content. The resultant solution was subjected to uranium precipitation. The precipitate was gently washed with water and dried.

中文翻译：

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从埃及西奈西南部含卡诺石的高岭石样品中连续回收钒和铀

在这项工作中; 在连续浸出钒和铀之前，测定 3.063%U 和 2.142%V 的卡诺石样品经过焙烧步骤。样品首先用 Na2SO4 焙烧，然后用水淬灭熟料以溶解钒。在优化的焙烧条件下，钒的溶解效率达到89.5%。然后用NH 4 Cl处理获得的溶液，以NH 4 VO 3 的形式沉淀钒物质。其次，在H2O2存在下用碳酸盐-碳酸氢盐溶液处理剩余的残余物以浸出铀含量。对所得溶液进行铀沉淀。用水轻轻洗涤沉淀物并干燥。