Dec '13/Jan '14

The best in new technology

Compiled by Alexandra Lopez-Pacheco

◢ Crush and screen at once

ARES-PRISMIrock Crushers, which manufactures portable crushing plants and screening equipment, has in essence combined the two pieces of equipment with its new Sidewinder series of crushers. “The Sidewinder screens out material that is already to the size that customers are looking for and then it just crushes the oversized material, whereas a traditional screening plant crushes all the material and then screens it,” says Sean Donaghy, national sales manager. “If you’re running 300 tonnes an hour in a traditional plant, you’re going to crush it all, which means more wear and it will take longer to do. But if 150 tonnes of that is already the size desired, Sidewinder is going to screen that out and only crush the rest,” he explains. Such crushers have been typically used as primary crushers for gravel applications and recycled-asphalt operations, but they are also ideal for secondary use in quarry mining.

◢ A new model for mucking

Cowan-DynamicsPrimarily used in tunnelling applications until now, Atlas Copco’s electro-hydraulic Häggloader continuous loaders are designed to fit almost any application and can be configured with either a backhoe or two individual digging arms. “The Häggloader is a continuous loader that transfers material from the muck pile into the truck in a smooth process that is controlled by the operator,” says sales support manager Jamie Tomporowski. “This translates to less handling of the material, which always relates to lower cost for moving material.” The Häggloader, available in rubber-tired, rail-borne or crawler models, features a computer-controlled hydraulic system that monitors all of the equipment’s components and relays information to the operator. “As well, the digging control system can be tuned for the skill level of the operator via a connection between the system computer and a service technician’s laptop computer that has the control software,” says Tomporowski. “The ability to change the digging configuration allows the Häggloader to be set up in the most efficient method for the required application – be it development work or production work of moving material.”

◢ Ceramic iron ore filter

SEI_GOCeramic filters are standard for copper filtration, but until recently they could not be used in iron ore filtration, mainly because the filters were too small and could not handle the capacity requirements of iron ore. That meant the sector could not benefit from the technology’s low-energy consumption and reduced carbon dioxide emissions. Leading the way in adapting the technology to iron ore is the Outotec Larox CC 240 filter. “It is twice the size of anything else available,” says Jason Palmer, filtration business senior manager. “This large filtration area is achieved with fewer components. By installing fewer filters with a high-level of automation, the whole filtration plant is less expensive and more reliable.” He adds that on the vacuum side, the power required by ceramic filters is only one per cent of the level required in conventional vacuum filters. “The ceramic filters also have a long life, lasting several years, compared to conventional filters that need large quantities of polypropylene filter cloth. Both of these issues contribute to the small carbon footprint.” Among the CC 240’s other features is a closed loop acidcleaning circuit. “The patented acid recycling system can reduce acid consumption by over 80 per cent,” says Palmer.

◢ On the online auction block

IPFFrom large items like heavy machinery right down to electrical cable, Mine Source Auctions has auctioned just about every type of equipment used in the mining industry. As with most online auctions, the buyers sign up for free and can make bids, while the sellers pay a commission to Mine Source if they sell the equipment. “Mining companies are in the business of mining,” says Matt Alexander, who co-founded the site along with his brother, Mark. “They aren’t equipment sales specialists; often surplus is an afterthought for them and they aren’t getting great value for it. An online auction provides a fair marketplace. There’s also the corporate responsibility side that appeals to them because the equipment is not going into landfills.”

◢ Shovel power saver

GFSCaterpillar is preparing to release its new Cat Power Demand Management System, which will make it possible to reduce the power draw from its Cat 7495 and 7495 HF Electric Rope Shovels. The system allows shovels to operate on either four megawatts of generator power instead of eight or, conversely, to provide the shovel with a boost in megawatts when peak power is required. Available as a retrofit on used equipment or as an option on new units, the system uses technology that stores regenerative energy created during swing deceleration and bucket lowering, which can be used later to power the shovel during periods of high demand. When a shovel is connected to the electrical grid, the system stores regenerative energy onboard and releases it during peak demand to reduce utility supply requirements and to cut power costs significantly. “A large electric rope shovel, such as the Cat 7495, requires eight to 11 generator sets and a resistor grid for its power supply system when it’s not connected to the electrical supply grid,” says Wayne Chmiel, electric rope shovel product manager. “The Cat Power Demand Management System enables two generator sets to meet the needs of that same shovel.”

◢ Deep water dredging

ArcGISDeep water mining poses significant challenges, but Dredging Supply Company Inc. has designed its Marlin Class deep mining dredge to overcome them. “The deeper you go, the longer the suction tube has to be if the pump is on the surface,” says Charlie Johnson, sales director. “So instead of trying to lift the material to the pump, we bring the pump to the material.” As a result, it can deliver some 10 per cent more ore or aggregate per horsepower used than traditional dredge designs at depths of around 60 metres. The dredge is highly customizable depending on the situation and materials a company is mining.

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