Series No 459
!ꢀ ꢀ "ꢀ ꢀ #ꢀ ꢀ $
20%14&(4&599''
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Septemberꢀ 2014
METAL MINE
м@¾ÊÑÒ¢Ó
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ꢀ *ꢀ C'0FÏÆQÔ¶hE·'0。 ¸±U\UæÁX¸ 85% 、 i6¸ 0 048 ~ 0 mm、 Àpi
2 3 2 3
¸
SiO 、 Al O 、 Fe O uE«0¨QÔ¶hÆE¦VC'0Ç9, NaOH EdX、 YZ{6、 YZª¢gõ HCl
2
EdXܵlùú。 e, VÏÆ% NaOH EdX、 YZ{6、 YZª¢gõ HCl EdXØèÆ%QÔ¶h
Æ'èE\UæÁX, 6 NaOH ùgEiX¸ 0 6, YZ{6¸ 600 ℃, YZª¢¸ 60 min, HCl ùg?Îi
X¸ 0 4 mL/ g EA, Ý{\UæÁX¸ 98 79% EÆ';。
+
,-ꢀ ÏÐÖÑꢀ Ò;\ꢀ Ó¢ꢀ NaOHꢀ HCl
ꢀ
ꢀ ./012ꢀ TD925 6ꢀ ꢀ ꢀ 34567ꢀ Aꢀ ꢀ ꢀ 3892ꢀ 10011250( 2014) 0908203
Purification of a Amorphous Graphite Using Alkaliacid Methods
1
2
Jiang Fang ꢀ Tu Wenmao
(
1. School of Resourc2es and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;
. Hubei Province Key Laboratory of Fuel Cells, Wuhan 430070, China)
Abstractꢀ The alkaliacid methods is the major process in purifying amorphous graphite. Purification experiments on dos
age of NaOH, roasting time, roasting temperature and dosage of HCl are conducted to find reasonable technological parameters
for a graphite with fixed canbon content of 85% , particle size from 0. 048 to 0 mm and impurities of SiO , Al O , Fe O etc. in
2
2
3
2
3
Hunan province. The results show that it is benefit to increase the fixed carbon content by properly increasing dosage of NaOH,
roasting time, roasting temperature and dosage of HCl. Purified product with fixed carbon content of 98. 79% is obtained at the
conditions of mass ratio 0. 6 of NaOH to the sample, roasting temperature at 600 ℃ for 60 min and the mass ratio of HCl to
sample 0. 4 mL/ g.
Keywordsꢀ Amorphous graphite, Fixed carbon, Alkaliacid methods, NaOH, HCl
ꢀ
ꢀ ¶hFÂn·y,;, >%{~、 ïC~、
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Ý2xé.'0@J\UæÁXÆ%á 85% g
È; C Ô i ¶ h E Á æ X ä %, Â % 60% ~
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0% , ¤%Ý% 95% , GØÔiõö¸ 0 01 ~ 0 10
μm, dPQfgkúÔ;, ×Ôi¶h, l×
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diálË:E±®; CCìÔ¸>&''0
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1
ꢀ Í(wù¯Í(ÂÃ
1
1ꢀ Í(wù¯
QÔ¶hùgü«0¨¶h,, i6¸ 0 048
0 mm, \UæÁX¸ 85% , pi©jÁXëe 1。
´
1ꢀ ÄóôwùQá0jS
/
1ꢀ NaOH Òð9ÞßêÙ¸¬½ðA
~
Fig. 1ꢀ Fixed carbon content of the purification
products on dosage of NaOH
2ꢀ ¨©Í(
CAìÆ¶h, YZ{66:(6Èl
Table 1ꢀ Chemical analysis of amorphous graphiteꢀ %
2
©
ꢀ
Áꢀ
ꢀ
Áꢀ
j
X
j
X
SiO
6 09
TiO
0 23
2
Al
2
O
3
Fe
0 86
SO
0 11
2
O
3
CaO
0 55
K
2
O
Na
0 26
Jꢀ
0 04
2
O
3 88
MgO
0 16
0 42
MnO
0 02
CpiR£FXzº: A%óá NaOH piIj
R£þE{6, V<:R£fgzº, Æꢀ¦
ó+; AYZ{6x%, ¶¶©ó¸ÀEã8h,
P[&'©^, eR£89m%EÀÿ, çªꢀ
ñ§j¶hv¡)KEðð<, ÜCRS';E\
UæÁX。 ¨ NaOH EAë¸ 328 ℃, ÔxYZ{
6ùú6 350 ~ 650 ℃Ûܵ。
©
2
3
P
2
O
5
H
0 08
ꢀ
ꢀ e 1 Ý g ¡ , ù g K À p i ¸ SiO2 、
Al O 、 Fe O u, ÀC2©j SiO 、 Al O 、 Fe O 、
2
3
2
3
2
2
3
2
3
CaO u, À2©j K O、 Na O、 TiO 、 MgO、 MnO
2
2
2
u。
ùúë>ð<Ì( NaOH) ¸jk, çëêj
:ù>±}þ&'; A( HCl) ¸jk, sU
á.<:ù>±}þ&'。
2ꢀ Í(tiOÂÃ
ùgr6¸ 30% EÂUXE NaOH 2;
ùú\U NaOH ùgEiX¸ 0 6, YZª
¢¸ 60 min, O_K[¹ 2 mL E HCl 2;, ùú
ë¬ 2。
<
1
@
Á, 6ÂU{6AA^ÂUª¢|ß、 l pH
¸
7 5 õö, AdÂUr6 5% EÂUXE HCl 2
!+O_ 30min, l pH ¸ 6 õö。
;
2
ꢀ S¯¡¢
1ꢀ õÒQ²ÒðÍ(
¨©ùgKÀpi©jjkÝwÀ
2
/
2ꢀ ¨©9ÞßêÙ¸¬½ðA
C©j¸、 r、 èð<;u, %{AA^C
、 r、 èupiR£, &©Ý2E<¦;。 ¸l
üR£ÜµIj、 zº, Â}¿dXóZ+
ûdXE 1 5 7[ 9] , ©x NaOH dXܵlOP。
Fig. 2ꢀ Fixed carbon content of the purification
products on roasting temperature
²
¬ 2 Ýg¡, Æ%YZ{6èÆ%R£
þ6, \UR£ª¢Ñ2MEpi,;ÁXXP,
ÔCÆ';\UæÁX²³P:; BR£{6E
Æ%, Â=ÍÂUª¢fR£EpiqDqZ, ô
Â=Í, í\Uæð)?&R£。 q¦fg,
NaOH ùgiXùú\UYZ{6¸ 600
, YZª¢¸ 60 min, O_K[¹ 2 mL E HCl 2
, ùúë¬ 1。
¬ 1 Ýg¡, B NaOH dXE[:, Ýg
ïðE NaOH %6j+EpiR£, ÔC';E
UæÁX²³È; B¥[: NaOH EdX, \
UæÁXcÈíAR, WF¨xXE
NaOH ñjnR£&';ÌE2M, 6åª,
Ìñ&©2.IW.6,6QÔ¶h
℃
;
±
UC2x(EYZ{6¸ 600 ℃。
3ꢀ ¨©Í(
QÔ¶h<:ìÆDâ, R£ª¢E¥
ÂU(6È?ølÆꢀÂ7Æ©^, R£ª¢q
, Æꢀ¦q%。 QÔ¶hECYZR£Ex(
wÇ:OPe, QÔ¶hKEÀpiECYZ
x(Â&óÝoR£[ 10] , ÖQÔ¶hKpi
\
2
¥
eÍ, f^ê, ÔCQÔ¶hEÆ。 q¦f
g, NaOH ùgEiX¸ 0 6。
·
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NaOH ¢ER£ÝAyR£, R£ªóÀ
6VB, JR£þ£Ï。
¸ 0 048 ~ 0 mm, Àpi¸ SiO2 、 Al O3 、 Fe O u,
2
ÀC2©j SiO 、 Al O 、 Fe O 、 CaO u, À
2
3
{
2
2
3
2
3
ùú\U NaOH ùgEiX¸ 0 6, YZ{
¸ 600 ℃, O_K[¹ 2 mL E HCl 2;, ùú
2©j K O、 Na O、 TiO 、 MgO、 MnO u, VBdC
2
2
2
6
ìܵÆ。
ë¬ 3。
( 2) 6 NaOH ùgEiX¸ 0 6, YZ{6
600 ℃, YZª¢¸ 60 min, HCl ùg?ÎiX
¸ 0 4 mL/ g, Æ';\UæÁX¸ 98 79% 。
¸
£
ꢀ ¤ꢀ 3ꢀ 4
[
1] ꢀ Inagak M, Toyoda M, Kang Feiyu, et al. Pore structure of exfoliated
graphite: a report on a joint research project under the scientific co
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[
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2] ꢀ Michio L, Tomoya N, Taisuke S, et al. Sorption kinetics of various
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/
3ꢀ ¨©9ÞßêÙ¸¬½ðA
Fig. 3ꢀ Fixed carbon content of the purification
products on roasting time
(
2) : 97102.
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¬ 3 Ýg, BYZª¢E», Æ'
\UæÁX²³ÈcAR。 YZª¢x
, Æ';\UæÁXcAREÀꢀÔÝã
Uævð<«。 Ôx, ±UYZª¢¸ 60 min。
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;
\
[
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2
4ꢀ öÒðÍ(
[
5] ꢀ ÈÓü, 3óq, ûp#, u. Û/ Ûo¦eÒ%{Ç:µ¸OP
HCl FÂnÔ´~ä¾, piR£óè&©f
A, V¦QÔ¶hÆE5。 HCl ùgE?Î
[
J] . G;ÛeÒ, 2003, 18( 1) : 2024.
2
Han Hongmei, Zhang Xiulian, Li Hejun, et al. Mechanical behaviors
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iXùú\U NaOH ùgEiX¸ 0 6, YZ
6¸ 600 ℃, YZª¢¸ 60 min, ùúë¬ 4。
{
[
6] ꢀ Gupta V, Nakajima T, Ohzawa Y, et al. Electrochemical characteris
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/
4ꢀ HCl Òð9ÞßêÙ¸¬½ðA
[
J] . Conservation and Utilization of Mineral Resources, 1997( 1) :
Fig. 4ꢀ Fixed carbon content of the purification
products on dosage of HCl
1
517.
[
[
9] ꢀ 5s], Pt, ûꢀ u, u. Ôi¶hE%{CLZìÆ
¬ 4 Ýg, B HCl ùg?ÎiXE
'0OP[ J] . ÛNO, 2000( 1) : 1214.
P:, Æ';\UæÁXäÏÂEÈ_。
Ï HCl ùg?ÎiXux 0 5 mL/ g ª, \Uæ
ÁXAR_, Ô¸xXEñꢀjE
ÌR£&©Â, Âèejk©¸.Q
i, RSl<'èE\UæÁX。 q¦fg, ±U
HCl ùg?ÎiX¸ 0 4 mL/ g。 £EÆ'
Liu Huaiqing, Xie Youzan, Li Ye, et al. Study on purification tech
nology of aphanitic graphite by calcining under high temperature and
alkali[ J] . Carbon Techniques, 2000( 1) : 1214.
10] ꢀ 3]v, 5aG, ꢀ ª. Ôi¶hÆ'0KEYZwÇ
:
OP[ J] . K0:::9: EAL:%, 2005, 36( 1) : 2933.
Zhang Qingcen, Liu Jianping, Xiao Qi. Baking kinetics for silicon
impurity in purification process of aphanitic graphite[ J] . Journal of
Central South University: Science and Technology, 2005, 36( 1) :
;
\UæÁX¸ 98 79% 。
2933.
3
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(
GHIꢀ dGe)
(
1) «0¨QÔ¶h, \UæÁX¸ 85% , i6
·
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