|
| Study on the Preparation of High Purity Graphite by Alkali-Acid Wet Method |
|
Received:November 13, 2023
Revised:November 21, 2023
Accepted:November 27, 2023
Published Online:January 26, 2024
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2024.03.013 |
| KeyWord:high purity graphite; pressure alkaline leaching; acid leaching; screening |
| Author | Institution |
| LIU Wei |
矿冶科技集团有限公司 |
| FAN Yanqing |
矿冶科技集团有限公司 |
| WANG Ling |
北京科技大学 |
|
| Hits: 1206 |
| Download times: 1192 |
| Abstract: |
| A wet alkali-acid preparation process was proposed for preparation of high-purity graphite. The effects of various factors on the preparation of high-purity graphite during pressure alkaline leaching and hydrochloric acid leaching for impurity removal were investigated. The results show that removal rate of aluminum and silicon is 88.18% and 89.69% respectively under the conditions including alkaline leaching temperature of 220 ℃, alkali concentration of 270 g/L, L/S of 8, time of 2 h, and stirring speed of 500 r/min. The fixed carbon content of high-purity graphite products is 99.89% above under the atmospheric acid leaching conditions including temperature of 80 ℃, acid concentration of 12%, time of 4 h, and L/S of 4. After sieving through a 200 mesh sieve, the residues on the sieve show an ash content of 0.092%, resulting in a fixed carbon content of 99.91% and a moisture content of 0.15%, which meet the technical requirements of medium high purity graphite LC(-)75-99.9 product of flake graphite (GB/T 3518—2008). |
| Close |
|
|
|