Investigation on the Separation of Hf from (Zr/Hf) CI4 Mixture Produced in ZPP of Iran by Solvent Extraction Using TriButylPhosphate (TBP)
Zirconium and hafnium are two important elements in nuclear industries. Zirconium is used in fuel rod for its low neutron absorption. Hafnium should be separated from zirconium, because it has higher neutron absorption cross section. In this research, separation process of the mentioned elements from (Zr+Hf)Cl4 mixture produced in the Zirconium production plant (ZPP) of Iran (Esfahan) was studied employing solvent extraction method in the nitric acid medium by using tributylphosphate (TBP) as solvent, and kerosene as diluent. The effects of nitric acid, sodium nitrate and amount of extractant, zirconium concentration in aqueous phase, phase ratio, agitation time, and mixer agitation rate were investigated on the separation process. The process was optimized at 5 M nitric acid, 1 M sodium nitrate, 60% (v/v) TBP. The optimum values for phase ratio, agitation time and agitation rate were 1.5 min and 500 rpm respectively. In this condition, the zirconium extraction efficiency, and separation factor were 65.1% and 205.59, respectively. Finally, we accessed to nuclear grade in this research.
Zirconium Hafnium Solvent extraction TBP Nuclear industries
K. Saberyan A. Sam N. Mansouri
Advanced Materials Research Group, Material Research School, Nuclear Science and Technology Research Institute, Karaj, Iran
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2706-2711
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）