| 摘要 |
In a two-stage comminution and grinding of brittle material for grinding with a grinding system which comprises at least one tube mill, in front of which a high-pressure roller press is connected, for the sake of complete utilisation of the roller press in its effect of tearing into or destroying particles of material for grinding without having to change and control the speed of revolution of the rollers for the purpose of matching the speed of revolution of the rollers of the roller press to the changing grinding charge requirement of the roller mill connected downstream, it is proposed according to the invention that the discharge of the roller press 10 which is continuously operated at maximum throughput rate be divided up into a stream of material flowing back to the grinding system 18 and into one flowing back to the charging device 13 of the roller press 10, and that a control element 16, or 16a, which is driven by the operating state of the grinding system 18 be arranged, by means of which control element 16, or 16a, the portion 21 of the discharge 15 of the roller press which is excess in terms of quantity in comparison with the capacity of the tube mill is fed back in a controlled fashion to the charging device 13 of the roller press 10. <IMAGE>
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