We discovered the location using Google Earth. We visited the location in April 2007. It seems to be a rather well known urbex location, we saw some other people walking around here.
Somewhere in the fifties Thyssen established this factory. It produced pellets that optimize processes in coke plants. In 1982 the factory was closed and was abandoned. In the meanwhile all machines were removed. The factory suffers from vandalism and its future is uncertain. It may be demolished, but on the other hand it could be turned into a landschafspark.