PDF
Full
Outline
The synergistic decomposition of scheelite by HCl-H2SO4 was studied. The influence of various process parameters on the decomposition effect was investigated, and the kinetics of decomposition process was discussed. The results show that under the optimal conditions of hydrochloric acid concentration of 22%, liquid volume of concentrated sulfuric acid of 0.5%, liquid volume to solid mass ratio of 2.5∶1, decomposition temperature of 85 ℃, decomposition time of 2 h, stirring rate of 360 r/min, the decomposition rate of calcium tungstate in scheelite is 99.6%, and the decomposition rate is high. The process of HCl-H2SO4 synergistic decomposition of scheelite is controlled by chemical reaction and solid film mixing, and the apparent activation energy is 45.52 kJ/mol. The CaWO4 in scheelite can be efficiently converted into tungstic acid, thus effectively improving the tungsten extraction rate in scheelite.
PDF
509
218
| 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
