Pb-Zn recovery from a malic leach solution of a carbonate type ore flotation tailing by precipitation and solvent extraction

被引：13

作者：

Hussaini, Shokrullah ^{[1
]}

Tita, Angela Manka ^{[1
]}

Kursunoglu, Sait ^{[2
]}

Top, Soner ^{[2
]}

Ichlas, Zela Tanlega ^{[3
]}

Kar, Umut ^{[1
]}

Kaya, Muammer ^{[1
]}

机构：

[1] Eskisehir Osmangazi Univ, Div Mineral Proc, Dept Min Engn, TR-26480 Eskisehir, Turkey

[2] Abdullah Gul Univ, Dept Nanotechnol Engn, TR-38100 Kayseri, Turkey

[3] Inst Teknol Bandung, Fac Min & Petr Engn, Dept Met Engn, Bandung 40132, Indonesia

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2021年 / 272卷 / 272期

关键词：

Pb-Zn recovery; Malic leach solution; Flotation tailing; Precipitation; Solvent extraction; DI-2-ETHYLHEXYL PHOSPHORIC-ACID; CHLORIDE SOLUTION; SULFATE-SOLUTIONS; ZINC; D2EHPA; MANGANESE; SODIUM; EQUILIBRIUM; SEPARATION; CD;

D O I：

10.1016/j.seppur.2021.118963

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The recovery of zinc and lead from a malic leach solution of a carbonate type ore flotation tailing by precipitation with sulfuric acid followed by solvent extraction using di(2-ethylhexyl)phosphoric acid (D2EHPA) as extractant was investigated. The separation of lead via precipitation was essentially complete from the malic acid leach solution by adding sulphuric acid to reach a pH of 0.25 at 25 degrees C. The precipitate product was identified by XRD as anglesite (PbSO4). The pregnant leach solution after lead precipitation was then subjected to solvent extraction using D2EHPA. The optimum solvent extraction conditions were determined as 10% D2EHPA concentration, 25 degrees C temperature, 10 min contact time and phase ratio of unity. Under these conditions, 99.3% of zinc was extracted into the organic phase at a pH of 4.2 in a single contact alongside a substantial amount of Ca (76.6%), and minor amounts of Fe (19.2%) and Mg (18%). Complete stripping of zinc and calcium from the loaded organic solution along with 47.8% of Mg was achieved at a pH 0.5 under room temperature. No iron stripping was observed from the loaded organic. The zinc content in the loaded strip solution could be enriched and then sent to the electrowinning (EW) stage. It is noted that the calcium and magnesium impurities in the loaded strip solution had no adverse effect on the zinc EW process. Based on the experimental results, a flowsheet was proposed for the recovery of Pb and Zn from the malic acid leach solution. With the proposed precipitation and solvent extraction process, two different material streams are produced.

引用

页数：9