| 摘要 |
of the Invention The invention relates to refining of fibre material in devices with grinding surfaces moving relatively each other whereby it is possible to drastically decrease the energy consumption through a combination of actions, mainly consisting of decreasing the grinding frequency and increasing the fibre material retention time between the grinding surfaces by making these cylindrical or conical and simultaneously discharge from the grinding space the main part of the steam produced during the refining. As such the invention has great importance for the lowering of the cost during production of pulp, in the first hand of high yield mechanical pulps. |
