PDF
Full
Outline
The process of extraction and separation of indium and Fe(III) requires a step of reduction of trivalent iron in advance and also emulsification is prone to occur. In order to solve the problems, an experimental study was carried out with acid leaching solution of volatile dust from a domestic large-scale zinc smelting enterprise to explore the processing technique of direct extraction with a extractant system of DY23 (a combination of extractant A and co-extractant M) to recover indium without a step of reduction of Fe(III) in advance. Based on the experiment, effects of organic phase concentration, phase ratio in extraction, extraction time and temperature on the separation between indium and Fe(III) were investigated. It is found that with a combined extraction system, consisting of 30% extractant A, 10% co-extractant M and 60% sulfonated kerosene, O/A ratio of 1∶1, the leaching solution of volatile dust is subjected to a two-stage countercurrent extraction at room temperature for 1.5 min, leading to indium extraction rate exceeding 99% and extraction rate of Fe(III) at only around 10%, presenting a good separation effect. The loaded organic phase is then subjected to a stripping process with 4 mol/L hydrochloric acid after being washed with 200 g/L sulfuric acid, leading to the stripping rate of indium exceeding 95%. After stripping of indium, the organic phase is subjected to another stripping with 70 g/L oxalic acid to remove Fe(III), resulting in the stripping rate of Fe(III) up to 98%. It is concluded that indium and Fe(III) therein can be effectively separated.
PDF
53
21
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
