| 摘要 |
In order to enable a reduction of the percentage of liquid in a liquid/coal pumping mixture the coal is dry-ground in a first grinding stage (1) to provide a relatively coarse particle size and then a fraction of the coarse ground coal is then dry-ground in a second grinding stage (9) to a relative fine particle size. The fine ground fraction is then mixed with the remainder of the coarse-ground fraction (7) and with the liquid. |
