萃取法制备高纯低氟氧化铌的研究

The Research of Preparing High Pure Niobium Oxide Using Extraction Technique

以氢氧化铌为原料,研究了萃取法制备高纯低氟氧化铌的新工艺,讨论了工艺条件对产品质量的影响,由正交试验得出较佳工艺条件为萃取剂和水比为11,萃取时间为20min,洗涤次数10次,煅烧温度800℃.在此工艺条件下,制取的氧化铌氟含量低于7ppm.工艺不对原HF-H2SO4-MIBK湿法冶金工艺产生影响,无需改变原操作参数和设备.

The new technique of preparing high pure-low fluorin niobium oxide from hydroxide niobium by extraction method was studied.The article discusses the effects of technical factors on the quality of product.When the better technical conditions are as follows: the ratio of extraction agent to water of 1:1,extraction time of 20 minutes,washing times of 10,calcination temperature of 800 ℃ which was achieved according to the results of perpendicularity experiment,the fluorine content of niobium oxide was under 7 ppm.The technic does not influence the wet method metallurgy technic of HF- H_2SO_4-MIBK,so the original operation conditions and the instruments need not be changed.