Water is used underground for preparing hydraulic fluids from concentrates, for cooling, and for dust suppression during face support and coal mining. Again, Seebach filter systems are used, each of which is adapted to the respective application and volume flow.

 

Sprinkling water filtration

A shearer loader must not be operated without continuous water sprinkling, otherwise the system will overheat and unacceptable dust generation will occur. At this point particle filtration is indispensable in order to ensure the continuous functionality of the sprinkling system and to prevent blockage of the nozzles.
Filters for sprinkling water are manually or automatically backflushable systems in a compact design, which are ideally adapted to hydraulic conditions and pressure at the point of use. This also applies to the sprinkling water filtration in the new Water Spray Technology, developed at Southern Illinois University Carbondale (USA), and has just entered the market. This new sprinkling water system can reduce generated coal dust by up to 60 %.
In addition to sprinkling, water is also used for cooling the shearer loader’s two motors. The operability of both motors, one of which drives the shearer drum and the other the machine itself, is maintained by effective water filtration. We deliver filters for this application that are individually adapted to the spatial conditions in the motor compartments. High volume flows through filter surfaces with small external dimensions is achieved through the use of integrated flow optimization.

 

Mine water filtration

Mine water originates from a variety of sources and emerges in different amounts depending on location and depth, the ground water situation, and the rainfall above ground. Mine water contains large amounts of minerals and is often very acidic. In addition, it contains suspended solids and, potentially, organic substances. Mine water is treated above ground in a multi-stage process in order to meet existing effluent limits or cleaned sufficiently for it to be re-used as process water in the mine. Pre-filtration of mine water above ground has proven to be an effective means of reducing the loading on treatment plants underground.

 

Filtration at the planer

Planers, scalping mining machines, are employed as an alternative to shearer loaders, which cut the material to be extracted. Water is used for cooling and dust suppression here as well. Safe continuous operation is ensured by means of inline filters, as well as by manually or automatically operated back-flush filter systems.

 

Filtration in cooling circuits

Mining at great depths, together with high engine outputs in mining machines, leads to enormous heat generation that has to be counteracted by powerful cooling systems. Large amounts of cold water are pumped at high pressure from the cooling plant located above ground into the mine shaft over a long distance.  The circulating cooling water is filtered in a by-pass to ensure uninterrupted operation with contaminant-free cooling water and to prevent flocculation or the build-up of deposits in the pipe system.

 

Tank filtration

In addition to high-pressure and backflow filtration, bypass filters at the hydraulic oil and finished hydraulic fluid tanks help to ensure that the fluids in the tanks are kept clean and in motion. Likewise, the water and hydraulic oil involved are filtered before they enter the fluid mixing plant.

 

Filtration at the shearer loader

A shearer loader must not be operated without continuous water sprinkling, otherwise the system will overheat and unacceptable dust generation will occur. At this point particle filtration is indispensable in order to ensure the continuous functionality of the sprinkling system and to prevent blockage of the nozzles.
Filters for sprinkling water are manually or automatically backflushable systems in a compact design, which are ideally adapted to hydraulic conditions and pressure at the point of use. This also applies to the sprinkling water filtration in the new Water Spray Technology, developed at Southern Illinois University Carbondale (USA), and has just entered the market. This new sprinkling water system can reduce generated coal dust by up to 60 %.
In addition to sprinkling, water is also used for cooling the shearer loader’s two motors. The operability of both motors, one of which drives the shearer drum and the other the machine itself, is maintained by effective water filtration. We deliver filters for this application that are individually adapted to the spatial conditions in the motor compartments. High volume flows through filter surfaces with small external dimensions is achieved through the use of integrated flow optimization.