During the different processing phases, Wheelabrator blast cleaning systems can be adjusted to fit specification. The adjustment will be made by regulating the abrasive throughput rate, by varying the abrasive throwing speed or the breadth of abrasive impingement. This guarantees maximum power utilisation, and the most efficient use of resources.
Specific surface finish requirements can be met by operating several machine modules in sequence. Cold-rolled steel strip can pass through the system without blast cleaning.
Machine Design and Mode of Operation
The machines consist of self-contained and can be installed with or without foundation pit.
Structural features and sub-assemblies:
- Blast cleaning cabin made of hard manganese steel: Four blast wheels for each module, two for the upper side and two for the underside of the strip. Rubberised rollers located at the entry and exit sides of the blast cleaning cabin serve to support the strip
- Abrasive removal device: After each blast cleaning cabinet, a compressed air blower removes abrasive residue from the upper side of the strip and returns it to the abrasive circulation system for re-use
- Abrasive return and reconditioning system with pneumatic separator: A pneumatic separator cleans the circulating abrasive. Aligned to consumption, new abrasive is supplied. As a result, the operating mix and blast power are constantly maintained
- Dust extraction system: Blast cleaning and abrasive removal cabinet, circulatory system and separators are connected to the dust collection system
The strip roll-out can be straight or run diagonally upwards, depending on the arrangement of the module groups and the subsequent pickling operation.
