| 摘要 |
The invention relates to a process for fine purification of graphite concentrates, wherein, in a multi-stage procedure, a graphite concentrate of any desired grain size is digested for 24 to 48 hours with stirring with addition of water and hydrofluoric acid, this digestion is repeated until the desired carbon content has been reached, the liquid is decanted off and the product is washed until neutral, predehydrated and dried. This gives an end product having a carbon content of 99.5 %.
|
