P204从高铝粉煤灰硫酸浸液中萃取除铁

主要针对高铝粉煤灰酸浸液中铁铝萃取分离性能进行研究,通过模拟高铝粉煤灰酸浸液(C(Al3+)=37.1 g/L,C(Fe3+)=5.1 g/L),采用P204+260#溶剂油萃取体系,对组成液中铁铝进行萃取分离,系统研究了P204体积分数、温度、反应时间、溶液初始pH值、相比V(O):V(A)等因素对萃取和反萃的影响,...

Extraction of Fe from sulfuric acid leaching solution of high-aluminum fly ash by P204

This paper researched the separation performance of Fe(Ⅲ) and Al(Ⅲ) from a high-aluminum CFA (coal fly ash) sulfuric acid leaching solution. When such a leaching solution (C(Al3+)=37.1 g/L, C(Fe3+)=5.1 g/L) was simulated, Fe(Ⅲ) and Al(Ⅲ) in the composition solution were extracted by using a P204+260# solvent oil extraction system. The effects of different parameters, such as the volume fraction of P204, temperature, reaction time, pH of the initial aqueous phase and organic-to-aqueous phase ratio V_(O): V_(A), on the extraction of Fe(Ⅲ) with P204 were investigated. Experimental results showed that when the CFA acid leaching solution was 40% P204 and 60% 260# kerosene at pH of 0.4 at 60 ℃ and the phase ratio of V_(O): V_(A)=1:1 contacted for 20 min, Fe(Ⅲ) extraction was 93.24% with 2.3% Al(Ⅲ) coextracted. The Fe-loaded organic phase was stripped with 5 mol/L HCl at an organic-to-aqueous phase ratio of 1:3, and almost 92.96% of the Fe(Ⅲ) was recovered from the Fe-loaded organic phase contact for 10 min.