Underground Mining Filtration

FA-ST Filtration Analysis Services Technology Ltd have recently introduced to the range of by pass micro filtration products, a NEW filter unit Part No 9778UMZ, specifically designed for applications where anti sparking, strength and durability are required. These units are manufactured in Zinc to comply with the statutory regulations for underground mining operations.
An initial trial was operated in China, from November 2005 to February 2006 with the co-operation of the Shendong Mining Company, a division of the ShenHua Energy Group, the largest energy and coal mining company in China. Two identical Dodge Rockwell Automation CST machines were selected CST2 & CST3 and a filtration unit was fitted to CST2.These machines operate for 20-22 hours a day, 7 days a week driving the coal conveyor systems from underground to surface. Oil samples were taken at pre-selected dates from each machine. The samples were analysed at the Mine laboratory and in our UK laboratory.

Comparisons were made between the two machines over the 3 month period and the additional filtration maintained the oil in CST2 in very good condition. The contamination levels rose in CST3 to unacceptable levels and the oil had to be changed. All CST machines have had to have the oil changed every 6 months because of high contamination of dirt and water, the additional filtration will prolong the oil life to at least 18 months therefore substantially reducing operating costs. The trial proved the products viability and efficiency.

The first batch of filtration units was installed in June 2006. These units are fitted to Dodge Rockwell Automation CST conveyor drive machinery above and below ground. FA-ST carried out the installations and also trained other engineers in the installation and maintenance procedures.