期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 5, 期 4, 页码 3550-3559出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2017.07.023
关键词
Zinc; Carbonate precipitation; Leach liquors; Electric arc furnace dust
The present work aims at determining the experimental conditions for the recovery of zinc from leach liquors, produced through dilute sulphuric acid leaching of electric arc furnace dust (EAFD), at atmospheric pressure. Zn can be recovered as an easily filterable precipitate. More specifically, zinc was precipitated by 99.5% with the form of a mixed white fine crystalline powder, comprising of hydrozincite (3ZnCO(3)center dot 3Zn(OH)(2)) and zinc carbonate hydroxide hydrate (ZnCO3 center dot 3Zn(OH)(2)center dot H2O). Zn precipitation was carried out in a pH range of 6.57 at 25 degrees C. The addition of different types of carbonated salts, such as sodium carbonate, sodium bicarbonate or ammonium carbonate, either with the form of suspensions or as solids, was investigated. The produced precipitates were characterized through means of particle size distribution analysis, chemical analysis, Xray diffraction (XRD), thermogravimetric/differential analyses (TG-DTA) and Fourier transform infrared spectroscopy (FTIR), whereas their microstructure and morphological characteristics were studied by scanning and transmission electron and microscopy (SEM/TEM). High grade zinc precipitates were obtained, as manganese concentrations did not exceed 1%, whereas traces of Cr, Cu and Pb were also detected.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据