A replacement of CM1 cement mill including demounting the existing technology and the manufacture of the mill
From the end of January to 6/4/2018 our company carried out a complete replacement of an old cement mill for a new one, including its manufacture.
The assembly of the new mill was a turn-key project (i.e. including all surveys and protocols and performance testing). On 5/4/2018 the mill was handed over to the customer for a testing operation under the surveillance of our company with the aim of a smooth start-up of the run.
The disassembly of the old cement mill was carried out by cutting the mill to 6 pieces, the mill was demounted including the jacket that was removed only in the places of the cut. The heaviest pieces reached the weight up to 45 tons. Lifting in such a confined space could be carried out only thanks to our special crane GROVE GMK 4100S with a strengthened boom design. There are only few mobile cranes in the world in this configuration, being able to telescope with a very heavy load.
The project was extraordinary in term of a short time for the replacement and installation of the new mill. The mill was assembled of 3 parts of a shell and fronts inside the cement millhouse. The particular parts of the mill were assembled and centred just inside the millhouse. Afterwards, welding of two joints of the mill shell using automatic submerged arc welding followed. This welding was performed simultaneously on the both joints while maintaining the quality of welded joints and dimensional tolerances of the shell.
The project demandingness lied in the coordination of all the heavy and complicated lifting in a very limited space, which required very strict safety measures, creating of special tools for the exact centring of the cylindrical mill and the sensitivity of the technology to tolerance deviations.
The main benefit for the customer was the fastness of the mill replacement and the cost saving owing to the assembly method (no need to build a costly transport track for the entire mill and to demount the millhouse steel structure).
All the tasks were fulfilled and the technology was successfully installed without any accident.
The project was succ
Thámova ulice 16
180 00 Praha 8 - Karlín
+420 581 267 111
+420 606 958 091