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发明公开
CN102502823A 高振实密度多钒酸铵的制备方法 有权

高振实密度多钒酸铵的制备方法
摘要：
本发明公开了一种高振实密度的多钒酸铵的制备方法，该方法包括以下步骤：a)在含钒液的pH为5.0～5.5以及温度为60℃～90℃的条件下加入多钒酸铵晶种和硫酸铵；b)将步骤a中得到的含钒液的pH调节至2.2～2.4并将其温度升高至90℃～95℃，在快速搅拌下沉淀多钒酸铵；c)对步骤b中得到的含钒液补加两次硫酸铵后，降低搅拌速度来沉淀多钒酸铵；d)进行过滤、洗涤、干燥得到高振实密度多钒酸铵。根据本发明的高振实密度多钒酸铵制备方法制备的多钒酸铵的振实密度高，并且用制备的多钒酸铵生产的氧化钒产品中的Na2O含量低。
摘要（英）：

The invention discloses a preparation method for preparing high-tap density ammonium poly-vanadate, which comprises the following steps of: a) adding ammonium poly-vanadate seed crystal and ammonium sulfate under the conditions that the pH value of liquid containing vanadium is 5.0-5.5, and the temperature is 60-90 DEG C; b) adjusting the pH value of the liquid containing the vanadium obtained in the step a) to 2.2-2.4, raising the temperature of the liquid containing the vanadium to 90-95 DEG C and precipitating the ammonium poly-vanadate under the quick agitation; c) after the ammonium sulfate is refilled in the liquid containing the vanadium obtained in the step b) for two times, reducing the agitating speed to precipitate the ammonium poly-vanadate; and d) filtering, washing and drying to obtain the high-tap density ammonium poly-vanadate. The ammonium poly-vanadate prepared by the preparation method of the high-tap density ammonium poly-vanadate is high in tap density; and the content of Na2O in a vanadium oxide product produced by the prepared ammonium poly-vanadate is low.

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