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(95oC)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%.
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%.
出处
《过程工程学报》
CAS
CSCD
北大核心
2003年第1期53-56,共4页
The Chinese Journal of Process Engineering
关键词
多钒酸铵
APV
酸性铵盐沉淀
工艺条件
ammonium polyvanadate
acidic precipitation of vanadate-leaching solution
technological conditions
