SPMT-slalom with a suportring

SPMT-slalom with a suportring

Modernisation of a converter

The "Hüttenwerke Krupp Mannesmann GmbH (HKM)" was about to modernize its 300-ton LD converter No. 2 at the Duisburgs location. The modernization included a new support ring for the converter and the tilting drive was to be renewed.  

RIGA MAINZ was commissioned to transport the support ring, which we planned in three steps. The first day was dedicated for the preparations. These included the installation of the two LTM 1500-8.1 telescopic cranes at the plant's own port and the mobilisation of the 20 SPMT axles with PPU (drive unit). On the second day, the 152 t running ring could be handled. This was loaded onto the SPMT by crane. Now the ring had to be transported to a pre-assembly site approx. 3 km away, where the manufacturer still carried out final assembly work on the ring. In the meantime, we were able to organise the dismantling of our cranes at the port. After five weeks, we picked up the old, dismantled support ring from converter 2 in order to bring it to an installation site as well. As soon as the preparatory work for the new ring had been completed, our team was able to get back to work two days later. Due to the assembly work, the ring had the dimensions of approx. 14 x 10 meters and a height of 3.30 meters. Driving such a colossus over a factory site requires a number of measures to ensure a smooth transport. Above all, the supports of the pipe bridges had to be passed with extreme caution. 

The ring with a weight of 190 t and all obstacles on the factory site survived the almost 1.5 km to the converter undamaged. In any case, the effort was worth it; the modernization extends the service life of the converter by approx. 30 years.

"HKM" operates on one of the largest iron and steel works in Germany at the Duisburg-Huckingen site. Around 5.6 million tons of steel are produced here every year.

HKM Hüttenwerke Krupp Mannesmann GmbH > PLACE OF USE: Duisburg > EQUIPMENT: Transhipment port 2 x 500 t telescopic cranes LTM 1500-8.1, outreach 17.5 m x 76.0 t, transports 20 axles SPMT with PPU > HIGHEST INDIVIDUAL PART: 190 t > DIMENSIONS: 14.69 m x 10.30 m x 3.30 m > DESCRIPTION OF APPLICATION: Transport of a support ring for a converter