Wilhelm-Düchting-Straße 22
D-58453 Witten - Germany
Phone: +49 - 2302 969 - 0
Fax: +49 - 2302 690443
info@duechting.com
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| Field
of Application: Mining |
When mining coal and ore underground the pit water which accumulates has to be pumped away to prevent it from flowing through the working area. Normally this is done by pumping the pit water to the surface. Right from the start DUCHTING PUMPEN created a solution for retaining the water in the mine using heavy-duty centrifugal high-pressure pumps. The high-pressure pumps of the HK series, of conventional construction with a high voltage motor, are set up in underground chambers excavated for the purpose. The collected pit water is usually fed to the high-pressure pumps via water collection points either by free flow or by means of feeder pumps. Pit water is not completely free of solid particles and chemical compounds, so, as a good standard DUCHTING PUMPEN adopts a normal speed of 1450 1/min with high-grade austenitic stainless steel as the material. If the pit water is particularly pure, higher speeds (3000 or 3600 1/min) are economically possible with two-pole motors. Production Series: 
Thanks to the high pumping performance of the HK pumps, the expense
of pumping from level to level is avoided and the possibility of automating
this type of pumping station becomes economical. In comparison to
under-water motor pumps, high-pressure pumps of conventional build
have proven their worth due to their robustness and long life. High-pressure pumps of the HK series in conjunction with the DUCHTING PUMPEN DH series can also be used for hydraulic extraction. If there is suitable pit water available and the environment is right, this type of extraction can be more economical for suitable seam thickness.  High-pressure
pumps of the HK and LHK
range are also used in the mines for cooling systems using large heat
exchangers. For decades now, our medium-size HK10 series has been
the most frequently bought pump for secondary water retention.As far as the exploitation of coal and ore at surface level is concerned, DUCHTING PUMPEN can offer a very robust and - as a result of its high operating ratio - also a very efficient solution with its DH series. Due to their construction, all known high carbon steels can be built into the DH pumps. The wear plates are clamped in. The modular construction of the DH range allows an optimal selection of build sizes, tailor made for the specific application. The back pull out design of the DH series permits inspection of the wearing parts with little effort. |