dhms installs new tap hole equipment at blast furnace of ArcelorMittal in Eisenhüttenstadt


For current renewal and modification of blast furnace 5A of their steel plant in Eisenhüttenstadt ArcelorMittal relies upon fully hydraulic tap hole equipment of Deilmann-Haniel Mining Systems GmbH (dhms).

The scope of delivery includes two fully hydraulic tap hole drilling systems, a new electro hydraulic drive station for the tap hole drill rigs and clay guns as well as the corresponding control, automation and visualization systems.

New hydraulic pipes have been installed and further preparation work has been carried out even before the scheduled shutdown phase. At present the old installations are disassembled and the new system components are installed. During this process the existing clay guns are integrated into the new systems with regard to their drive and control. The control and automation system is connected to the overall control system of the blast furnace via a bus system.


The new equipment of dhms shall contribute to ArcelorMittal's efforts to improve the efficiency of the blast furnace. High-performance blast furnaces require ever harder tap hole clays, which in turn call for powerful hydraulic drilling systems. These enable an optimum opening strategy and optimal adjustment and reproducibility of tapping parameters.


Hydraulic high-performance rotary percussive drifters of dhms are used for drilling of the tap holes. These guarantee excellent drilling results and high efficiency. The patented rotary slide control system enables infinite control of the impact frequency and impact energy, enabling high drilling performance under all drilling conditions. A hydraulic dampening system effectively prevents rebound impacts and protects the drifter and drilling tools. For rapid retraction of the drifter and drill rod under difficult drill hole conditions, a hydraulic back-hammering device can be activated.


Drilling procedure is made by rotary drilling to a large extent. In case that the preset drilling speed is not achieved, the impact mecanism is switched on and the impact energy is adjusted according to requirement. This allows among other things an optimum protection of the tap hole surrounding. Drilling processes can be carried out either manually or automatically.


All work within the scope of relining of blast furnace 5a shall be carried out in only approx. 52 days. Restart of the blast furnace is planned for mid of November 2016.


Fig.: dhms tap hole drill rig