A NEW PROCESS FOR PRODUCING HIGH GRADE GRAPHITE FOR USE IN MANUFACTURING Mg-C BRICKS IN STEEL MAKING

金属学报(英文版), 2006, 19(2): 139-143.

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1.Materials Department, Yunnan University, Kunming 650091, China

2.Materials Department, Yunnan University, Kunming 650091, China

3.Materials Department, Yunnan University, Kunming 650091, China

4.Kunming Iron and Steel Company, Kunming 650300, China

基金项目: the Yunnan Science and Technology Department Contract of China(PY2002PY01,2001 HG 04)

A NEW PROCESS FOR PRODUCING HIGH GRADE GRAPHITE FOR USE IN MANUFACTURING Mg-C BRICKS IN STEEL MAKING

Keywords： graphite ore

Based on the characteristics of graphite ore from Panzhihua district, the present research tried to find a new technology to increase the purity of the graphite carbon from 93% to 97%. Study was conducted on leaching agents, time, temperature, stirring speed and concentration of leaching solution affecting the process. The technological parameters chosen were: L/S=3:1, reaction time 30min, 5% concentration of sulfuric acid, reaction temperature 70℃, stirring speed 200rev/min.The results of the continuing tests with one kilogram showed that the graphite content can be increased from 93% to 97%, which reaches the requirement for high grade graphite. When waste acid from coke making is used to leach graphite, the result is also satisfactory, but the treatment of waste solution containing organic substances has to be further investigated.

参考文献

[1]	X Liang.Non-Metallic Ore[M].北京:冶金工业出版社,1998:357.
[2]	D N Lu .[J].Nonmetalliferous Ore,1999,37(01):24.
[3]	X W Yang.Hydrometallurgy[M].北京:科学出版社,1996:245.
[4]	L M Zhou .[J].Nonmetalliferous Ore,2001,39(02):34.

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A NEW PROCESS FOR PRODUCING HIGH GRADE GRAPHITE FOR USE IN MANUFACTURING Mg-C BRICKS IN STEEL MAKING

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