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›› 2003, Vol. 3 ›› Issue (1): 0-0.

• 1 •    

酸性铵盐沉钒条件实验研究

李大标   

  1. 攀宏钒制品有限公司，四川 攀枝花 617023
  • 出版日期:2003-02-20 发布日期:2003-02-20

Preparation of Super-fine Spherical CaCO3 by the Carbonation Method

XIANG Lan, XIANG Ying, YUAN Hong-xia, WANG Ting-jie   

  1. Panhong Vanadic Products Co. Ltd., Panzhihua, Sichuan 617023, China
  • Online:2003-02-20 Published:2003-02-20

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摘要： 以温度、时间、搅拌强度为变量，以沉淀率、抽滤后滤饼含水量、烘干后多钒酸铵(APV)中杂质含量等作为评价指标，对酸性铵盐沉钒条件进行了研究. 结果表明：以含钒30 g/L左右的溶液为原料，加硫酸铵后用硫酸调节pH至2.2左右，沸水浴(95℃)中沉淀120 min左右，桨式搅拌转速300 r/min，可获得99%以上的沉淀率，抽滤滤饼含水量20%以下，烘干后APV含Na 0.70%~ 1.08%, S 0.78%~1.20%.

关键词: 多钒酸铵(APV), 酸性铵盐沉淀, 工艺条件

Abstract: The effects of temperature, time, and agitation speed on the acidic precipitation of ammonium polyvanadate from the plant of vanadate-leaching solution were investigated on a laboratory scale. The results show that for the vanadate-leaching solution containing 30 g/L of vanadium, keeping pH about 2.2 at the beginning of precipitation reaction, temperature at about 95oC, agitation speed at 300 r/min, and reaction time being 120 min, could result in the following results: precipitation rate is more than 99%, H2O content in red cake is less than 20%, Na content in dried red cake is between 0.70% and 1.08%, and sulphur content in dried red cake is between 0.78% and 1.02%.

Key words: calcium carbonate, super-fine powder, carbonation method, tube sparger, additive

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