Beneficiation of ultra-large flake graphite and the preparation of flexible graphite sheets from it

LI Ji-hui; HOU Shi-yu; SU Jia-rui; LI Kuan; WEI Lu-bin; MA Li-qiang; SHEN Wan-ci; KANG Fei-yu; HUANG Zheng-hong

doi:10.1016/S1872-5805(19)60012-0

Volume 34 Issue 2

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Article Navigation > New Carbon Mater. > 2019 > 34(2): 205-210

LI Ji-hui, HOU Shi-yu, SU Jia-rui, LI Kuan, WEI Lu-bin, MA Li-qiang, SHEN Wan-ci, KANG Fei-yu, HUANG Zheng-hong. Beneficiation of ultra-large flake graphite and the preparation of flexible graphite sheets from it. New Carbon Mater., 2019, 34(2): 205-210. doi: 10.1016/S1872-5805(19)60012-0

Citation:

LI Ji-hui, HOU Shi-yu, SU Jia-rui, LI Kuan, WEI Lu-bin, MA Li-qiang, SHEN Wan-ci, KANG Fei-yu, HUANG Zheng-hong. Beneficiation of ultra-large flake graphite and the preparation of flexible graphite sheets from it. New Carbon Mater., 2019, 34(2): 205-210. doi: 10.1016/S1872-5805(19)60012-0

Citation:

LI Ji-hui, HOU Shi-yu, SU Jia-rui, LI Kuan, WEI Lu-bin, MA Li-qiang, SHEN Wan-ci, KANG Fei-yu, HUANG Zheng-hong. Beneficiation of ultra-large flake graphite and the preparation of flexible graphite sheets from it. New Carbon Mater., 2019, 34(2): 205-210. doi: 10.1016/S1872-5805(19)60012-0

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Beneficiation of ultra-large flake graphite and the preparation of flexible graphite sheets from it

doi: 10.1016/S1872-5805(19)60012-0

1.
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;
2.
Key Laboratory of Advanced Materials(MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;
3.
School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China

Received Date: 2019-01-01
Accepted Date: 2019-04-30
Rev Recd Date: 2019-03-31
Publish Date: 2019-04-28

Abstract

Abstract

A graphite ore with ultra-large flakes (ULFG) found in China (Wulate County, Inner Mongolia Autonomous Region, China), was first jaw-crushed and pneumatically separated to remove rocks, before being subjected to two froth-flotations and finally leached with NaOH and HCl to a purity of 99.9%. The purified ULFG was used to prepare exfoliated graphite by a combined chemical intercalation and rapid heating method and the latter was rolled into flexible graphite sheets of different densities. Results show that the beneficiation and purification methods preserve the graphite crystallites. The purified ULFG has a high degree of graphitization (99.9%). The volume of the ULFG-based exfoliated graphite is more than 400 mL/g, and some randomly selected individual exfoliated graphite particles are larger than 40 mm. A ULFG-based flexible graphite sheet with a density of 1.8 g/cm³ shows an excellent electrical conductivity of 2.78×10⁵ S/m.
- Ultra-large flake graphite,
- Exfoliated graphite,
- Flexible graphite sheets,
- Electrical conductivity

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References(22)

References

Long Y, Zhang G, Li Z, et al. Research progress of protecting large lateral size of flaky graphite[J]. China Non-metallic Mining Industry Herald, 2013, (02):44-47.

He P Y, Zhang Z Y, Deng C C. Selective grinding and floating test on flakey graphite in africa[J]. Bulletin of the Chinese Ceramic Society, 2016, (09):2826-2831.

Huang G P, Sun W H, Chen D M, et al. Mineral exploration & exploitation actuality and mining investment environment of madagascar[J]. Resources Environment & Enginnering, 2015, 29(4):442-448.

Yin L. Exploration and development progress of globle mineral resource[C]. China Non-metallic Mining Technology and Market Exchanging Conference, 2012.

Long Y, Zhang G, Li Z, et al. The method to express protecting flaky graphite of grinding effect[J]. China Non-metallic Mining Industry Herald, 2013, (06):32-34+47.

Tong H, Sun J, Wang L, et al. Study on prebenificiation process to protect flaky graphite[J]. Conservation and Utilization of Mineral Resources, 2010(06):37-39.

Yue C. Research on speed flotation of flake graphite[J]. Non-metallic Mines, 2007, 30(05):40-41+59.

Pan J. Improvement of treating technology to raise the grade of graphite ore concentrates and protect big size scales of graphite[J]. China Mining Magazine, 2002, (04):28-30.

Liu Y, Liu J, Wei J. Study on the process of improving the yield and grade of large lateral size for one flaky graphite ore[J]. Non-metallic Mines, 2003, 26(1):50-51.

Qu X, Zhang L, Li X. Study on new technology to protect flake graphite by grading for grinding and floating[J]. Non-metallic Mines, 2015, 38(2):53-55.

Celzard A, Marêché J F, Furdin G. Modelling of exfoliated graphite[J]. Progress in Materials Science, 2005, 50(1):93-179.

Chung D D L. Interface-derived extraordinary viscous behavior of exfoliated graphite[J]. Carbon, 2014, 68(3):646-652.

Chen P H, Chung D D L. Viscoelastic behavior of the cell wall of exfoliated graphite[J]. Carbon, 2013, 61(11):305-312.

Matsumoto R, Okabe Y. Electrical conductivity and air stability of FeCl₃, CuCl₂, MoCl₅, and SbCl₅ graphite intercalation compounds prepared from flexible graphite sheets[J]. Synthetic Metals, 2016, 212:62-68.

Matsumoto R. Investigation of the high, stable electrical conductivity in graphite intercalation compounds prepared from flexible graphite sheets[J]. Synthetic Metals, 2014, 198:107-112.

Matsumoto R, Arakawa M, Yoshida H, et al. Alkali-metal-graphite intercalation compounds prepared from flexible graphite sheets exhibiting high air stability and electrical conductivity[J]. Synthetic Metals, 2012, 162(23):2149-2154.

Matsumoto R, Nakajima M, Takano Y, et al. Superconductive CaC₆ prepared from flexible graphite sheets[J]. Solid State Communications, 2012, 152(9):767-770.

Chen P H, Chung D D L. Thermal and electrical conduction in the compaction direction of exfoliated graphite and their relation to the structure[J]. Carbon, 2014, 77:538-550.

Wei L, Zeng M. Separation and classification equipment for fine materials[P]. CN patent 201310045445, 2013.

Mering J, Maire J. Le processus de la graphitation[J]. Journal de Chimie Physique Et de Physico-chimie Biologique, 1960, 57(10):803-814.

Sasikala SP, Poulin P, Aymonier C. Advances in subcritical hydro-/solvothermal processing of graphene materials[J]. Advanced Materials, 2017, 1605473.

Wei X h, Liu L, Zhang J X, et al. Synthesis of HClO₄-GICs and the performance of flexible graphites produced from them[J]. New Carbon Materials, 2007, 22(4):342-348.

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