For the retrofit, RWE selected light pan conveyors with an
average performance of 150tph (tonnes per hour). During peak
times, the conveyors can transport 200tph since one pan
conveyor loads one megawatt. While designing the new
machines within the existing casings, some constructive tricks
became necessary to achieve the conveying performance needed.
AUMUND decided upon welded pan conveyors, which had to be
adapted very individually for the connection to the hopper.
The AUMUND conveyors with a standard width of 200 to
300 millimeters had to be built into the extremely cramped
constructive space. Simultaneously with an adaption and a
complete exchange of the former material feed, the conveyors
were equipped with a new surface. Due to the limited space
available between material feed, side plate and rollers on one side
and the outer edge of the casing - pressure tight up to one bar -
on the other side, a special construction had to be realized.
Because of the negative pressure loading of the coal mills, special
attention was given to a better sealing of the entire casing to
avoid leaking air.
The arising material loads underneath the bunker chutes were
brought under control by installing a baffle beam. With an
increased board height, the feedback conveyor had to be
lowered. Besides, a smaller sprocket wheel was used.
While equipping the pan conveyors, the designing engineers
selected the AUMUND chain AU6052 .With a significantly higher
safety than normally chosen for comparable uses, notably higher
service life can be achieved. The use of new flights between the
chain strands, the lowering of the tensioning axis and the
installation of a new sprocket wheel completed the retrofit.
ABOUT THE AUMUND GROUP
The AUMUND Group is active worldwide. The conveying and
storage specialist has special expertise at its disposal when
dealing with bulk materials. With their high degree of
individuality, both its technically sophisticated as well as
innovative products have contributed to the AUMUND Group
today being a market leader in many areas of conveying and
storage technology. The manufacturing companies AUMUND
Fo¨rdertechnik GmbH (Rheinberg, Germany), SCHADE
Lagertechnik GmbH (Gelsenkirchen, Germany), SAMSON
Materials Handling Ltd. (Ely, England), as well as AUMUND
Logistic GmbH (Rheinberg, Germany) are consolidated under the
umbrella of the AUMUND Group. In conjunction with the
headquarters of the manufacturing companies, the global
conveying and storage technology business is spearheaded
through a total of eight locations in Asia, Europe, North and