A selling-point of their technology is that it enables horizontal and vertical curves with angles of inclination of up to 15 degrees, depending on the topography and the type of materials being moved. The company points out that their ability to navigate curves means that fewer transfer towers are needed, resulting in substantial cost savings for the customer as the system continuously transports the material at a consistent rate, regardless of the circumstances. There are other cost factors in the equation. Closed pipe connectors don’t have to consider control measures against the likes of dust and rain drainage, for example. Advocates of the road option point to the fact that, especially for aggregate and mineral processing start- ups, it’s cheaper to start small and invest in a few vehicles than install an entire customised belt system from scratch. Richard Munson, who has handled sales in the sector from his office in Kansas, USA, for more than ten years calculated that, when taking volume into consideration, a conveying system would be a good bet: probably paying for itself within a few years of installation. “Depending on the project, belt conveying systems
require up to 90 per cent less primary energy than comparable truck transports,” he said when referring to a concrete project implemented for the Chinese cement manufacturer, Sichuan Yadong Cement. Trucks operated with diesel fuel required a specific primary energy of 11.4 kWh for each ton of transported material at their site. The belt conveying system which was built later required only 1.44 kWh. If, as in this case, 7.5 million tons of raw material are transported annually, the user can save a total of 74 million kWh per year by choosing the belt conveyor option.
This corresponds to an energy consumption of more than 20,000 single-family houses. Solely by saving diesel fuel, the operational costs of the company are estimated to be reduced by more than €5.5 million per year. So does the investment in a belt conveying system pay off? “More often than people realise,” he added. He told EngineerLive magazine: “Companies should carry out a profitability evaluation beforehand, but in the end, the operator needs to consider the total costs per ton over time when evaluating both transport options.” It’s little surprise then that troughed belt systems have become a popular choice within mines and quarries, particularly in terms of safety – there’s limited contact during operation, no loading/unloading stops – and “wasted” return journeys with the truck bed empty. What’s more, there are no drivers calling in sick.
POWTECH IS THE PLACE FOR INNOVATION Powtech exhibitors have a well-established reputation for belt innovations. REMBE Kersting GmbH, for example, developed UNIBAND, a rugged, weather-proofed belt weighing unit made from stainless steel for weighing different, continuous material flows. It’s very easy to integrate into conveyor systems and, thanks to its low installation
height, the scales can integrated into any existing system.
The company points to the fact that weight measurements are an effective way of optimising processes in stone, soil and food processing as well as pharmaceutical products. It adds that “outstanding accuracy and maintenance- free components” were top priorities during the development process.
comfortably be
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