| 摘要 |
The invention relates to a heating unit for rock material, which is intended for heating and screening of rock material. The heating unit includes a rotating drum (10), conveyor devices (16) for feeding the rock material into the drum (10), a heat-developing unit (15), and a set of outlet screens (11) for screening the heated rock material. The drum (10) includes two coaxial jackets, an outer jacket (20) and an inner jacket (21). There is a fine screen (22) at the start of the inner jacket (21), through which the fines are arranged to travel to the space (23) between the inner and outer jackets and from there to the set of outlet screens (11).
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