transport cost savings in quarry processing
belt conveyors save a lot of money in comparison to dump truck haulage. belt conveyors are much cheaper to maintain, because they contain far fewer parts and they also don’t use as many spare parts, e.g. tires, as dump trucks. in addition the excavator can be downsized to fit the capacity which is needed for the crusher. usually the amount of haulage affects the required size of dump trucks and the design of the truck itself directly influences the choice of the excavator.
by using pitc quarry crushing system the excavator only needs to match the demands of the mobile crusher processing potential. as explained previously, the best way to feed the mobile crusher is an excavator in backhoe operation. therefore it is obvious that a smaller excavator in combination with pitc quarry crushing system can be as productive as an excavator with linked dump truck haulage. if the haulage is done by a conveying system, which is controlled by the excavator operator, there is no longer a demand for dump trucks and operators for them. therefore labour costs could be saved and the quarry roads don’t need to be built elaborately and kept well maintained, which could be expensive in the long term. in different internal studies it has been proved that the haulage energy costs could be 50 percent to 70 percent lower in comparison with dump truck transport.
cost saving with pitc quarry crushing system in removing overburden or waste material is not excluded.
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mining further advantages
besides the cost savings, there are still other advantages of an pitc quarry crushing system that should be mentioned. by the use of conveyor haulage the impact to the environment is also significantly reduced. the elimination of dump trucks reduces noise and emissions of exhaust gas. moreover fast driving dump trucks are always a risk for operators and the technical surrounding. studies indicate that vehicle movement is one of the most dangerous operations in quarries.
in 1997 almost 38 percent of all us mines and quarry fatalities were caused by powered haulage. besides increased safety, less traffic also means that less dust is produced. therefore the watering of haul roads can also be reduced. as an example a texas based mining operator reports that his new 2-mile-long conveyor eliminates more than 140.000 cycles, which means 570.000 vehicle miles on an annual basis are no longer needed. as a matter of fact, this does not only reduce fuel con-sumption and labour costs but also reduces esti-mated production of pm- 10 emissions by mobile haulage from 95 kg/d to 3 kg /d. under very special conditions regarding dust emissions the whole conveying chain could be equipped with dust en-capsulation. furthermore, pitc quarry crushing system offers high resale values if mining activities are stopped at a site. normally only some parts of a former primary sta-tionary crushing plant can be sold and moved, e.g.antivert online crusher and feeder. but the concrete will remain and the steel has only scrap value.
by using pitc quarry crushing system everything could be moved easily to another mine or operation, because there is a growing world market for second hand mobile crushers. even if mine prospecting went wrong and the primary crusher is set up on the best part of the deposit, there would be no need to worry, if an pitc quarry crushing system was chosen. a fast, easy and cheap relocation will grant access to this part too.