Process and recycling plant for recycling bituminous materials and novel bitumen material

摘要

Utilizing bitumen-containing materials from the roof material production and/or bitumen-bound old roof materials, comprises comminuting the roof material to a grain size of 20-300 mm, over-heating the roof-material up to 220[deg]C, melting and/or pressing the warmed-up roof material, filtering the melted-up and/or pressed-up bitumen material through a filter with a hole size of 120 mu m, adding a proportion of 25-35% fresh bitumen to the bitumen material, cooling the bitumen material in a conveyor belt set-up and subsequently coating and granulating by a separating agent. Utilization of bitumen-containing materials from the roof material production and/or bitumen-bound old roof materials, comprises comminuting the roof material to a grain size of approximately 20-300 mm, over-heating the roof-material up to 220[deg]C during an induced movement of the material to be mixed in a melting tank, melting and/or pressing the warmed-up roof material, filtering the melted-up and/or pressed-up bitumen material through a filter with a hole size of 120 mu m, adding a proportion of 25-35% fresh bitumen to the bitumen material, cooling the bitumen material in a conveyor belt set-up and subsequently coating and granulating by a separating agent or casting the bitumen material in block form and/or blending the suitable additives with the bitumen material. Independent claims are also included for the following: (1) a bitumen material, preferably bitumen granulates obtained by the above method, comprising old bitumen with a particle size = 120 pm (65-75%) and fresh bitumen (35-25%), which are additionally added to shale powder (up to 40%) and coating substances (3-10%), where the bitumen material exhibits a grain size of 10-30 mm and possesses a softening point of 74-75[deg]C; and (2) a recycling plant for carrying out the above method for comminuted and/or filtered and purified roof materials (1) with a grain size of smaller than 30 mm, comprising a mixing mechanism (17) for the material, arranged at a heatable melting tank (10), inside which a displaceable pressing and discharge mechanism (18) is arranged, a heatable buffer tank (14) is connected with the melting tank by a pump (11), where a slot-type edge filter (12) is inserted in the junction line between the melting tank and the buffer tank, in the heatable buffer tank, an agitator (19) is arranged, whose discharge line is alternatively led on a cooling conveyor belt with a crushing equipment (15), downstream to which a separation tank (16) is arranged, or the discharge line of the heatable buffer tank is led to a block casting mechanism (7).