苛化泥为焙烧添加剂从石煤提取五氧化二钒

Extraction of Vanadium Pentoxide from Stone Coal by Using Causticizing Mud as Roasting Additive

从石煤中提取五氧化二钒时 ,用苛化泥作焙烧添加剂 ,以取代氯化钠。焙烧后的物料先用水浸 ,再用碳酸氢铵并通入二氧化碳加压浸出。浸出液经离子交换法净化 ,再经沉钒和灼烧 ,得到合格的五氧化二钒产品。

Causticizing mud was used as a roasting additive of sodium chloride for extraction of vanadium pentoxide from stone coal. The raw feed after roasting was leached by water, and then by ammonium bicarbonate and introduced carbon dioxide under high pressure. The leaching solution was purified by ion exchange, and then ammonium metavanadate was precipitated. A qualified product V 2O 5 was obtained by calcining ammonium metavanadate.