Case study – How new things are created from waste

Slag Processing
Installation location

Schwandorf, Germany


Installation of the new plant in an existing silo with restricted space conditions

Conveyed material

Slag, Ash

Year of construction



Belt conveyor, bar screen, magnetic drum, magnetic separator, vibratory feeder

Special features

Customized electric chain hoist for maintenance work

Case study

Loibl supplies regionally for Bavarian companies

Constrained space. The new slag processing plant was installed in an existing silo which, along with three other adjacent bunkers, is used for the intermediate storage of slag and scrap. The plant is continuously supplied with slag via an 80-meter-long ascending conveyor belt. Michael Diller describes the arrangement of the new plant in the existing building as one of the greatest challenges: "Although the old plant was already housed in this building, the new plant is much more extensive and, with an area occupancy of approx. 510 m², was almost twice as large. In addition, the elevation grades from the existing belts played an important and limiting role for the new plant."

The slag preparation plant was installed at a height of between 12 meters (lowest level) and 23 meters (top level) above the silo floor on a new steel structure. Despite the confined space, it was possible to place all components with millimeter precision by means of an assembly lifting device, also planned and supplied by Loibl. The crane system is used for maintenance and inspection work.

Reduction of noise and humidity. Since the waste-to-energy plant is located about 100 meters from a residential area, special attention was paid to reducing noise sources. The so-called vapor fumes generated by the warm and moist slag in the silo are extracted at defined positions. Among other things, a new, high-performance splitter silencer in the vapor extraction system and a sound-reducing sandwich lining in the chutes contribute to noise reduction.

Protection for man and machine. To prevent malfunctions, overfill monitors have been installed which use microwave sensors to monitor the conditions of the system. As soon as larger parts get stuck and cause blockages, the ZMS employees are informed. This prevents damage to the plant and protects against accidents.

Project Gallery

The separated metals such as iron, copper, aluminum and brass are efficiently separated from the slag via this treatment process and made available with high purity. The recycled slag fractions are suitable, among other things, as a basic material in road construction and civil engineering. The recovered metals are used in metallurgy, for example.

Johann Waldemer

Sales Engineer

Tel. +49 9421 / 9256-916
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