Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Yunnan 650093, China.
J Hazard Mater. 2010 Apr 15;176(1-3):226-30. doi: 10.1016/j.jhazmat.2009.11.017. Epub 2009 Nov 10.
Diffusion dialysis with a series of anion exchange membranes was used to recover H(2)SO(4) from an acid leach solution produced during the vanadium manufacturing process. The effects of sulfuric acid, FeSO(4) and VOSO(4) concentration, flow rate and flow rate ratio on the recovery of H(2)SO(4) were investigated. The results showed that sulfuric acid permeated well through the membranes used, while metal ions were efficiently rejected. The recovery of H(2)SO(4) increased as the sulfate concentration of the feed increased and the flow rate ratio of water to feed increased. More than 80% of the H(2)SO(4) could be recovered from the leach solution which contained 61.7 g/L free H(2)SO(4), 11.2 g/L Fe and 4.60 g/L V at a flow rate of 0.19x10(-3) m(3)/h m(2). V and Fe ion rejection were within 93-95 and 92-94%, respectively. A preliminary economic evaluation revealed that an investment in this process could be recovered within 27 months.
采用阴离子交换膜系列扩散透析法从生产过程中产生的酸浸出液中回收硫酸。考察了硫酸、FeSO4 和 VOSO4 浓度、流速和水料比等因素对 H2SO4 回收的影响。结果表明，硫酸能很好地透过所使用的膜，而金属离子则被有效地排斥。随着进料中硫酸盐浓度的增加和水料比的增加，H2SO4 的回收率增加。从含有 61.7 g/L 游离 H2SO4、11.2 g/L Fe 和 4.60 g/L V 的浸出液中，以 0.19x10(-3) m(3)/h m(2)的流速可回收 80%以上的 H2SO4。V 和 Fe 离子的截留率分别在 93-95%和 92-94%之间。初步经济评估表明，该过程的投资可在 27 个月内收回。
