Success for first South African girth gear installation
By R Obermeyer, SEW-EURODRIVE South Africa
Electricity+Control, November 2015 (page 10)
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The R1,8 M Mamba Cement plant is expected to be operational by mid-2016, with the capacity to produce more than one million tonnes per year of cement, which will be sold to readymix and construction industries across South Africa.
A turnkey solution was made possible thanks to a synergistic partnership between SEW-EURODRIVE’s South Africa and China branches. The girth gear was designed in China and commissioned before being installed locally to exact client specifications.
The girth gear will be used to transfer the drive torque from the gear motor to the rotary cylinder. Its major advantage is that it weighs less than half of conventional girth gears, while still maintaining the same safety factor.
This is possible because the gear is manufactured from first-generation Austempered Ductile Iron (ADI) – a family of heat treated cast irons. The austempering heat treatment converts ductile iron to ADI, resulting in excellent strength, toughness and fatigue characteristics.
- A girth gear has been installed in a rotary kiln at a cement plant.
- The girth gear was designed in China and commissioned before being installed locally to client specifications.
- This was a complex project with minimal challenges encountered.