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AODD pumps are used in virtually all forms of mining: underground, open-pit, dredging and in-situ. Of the four types of mining, underground uses the most AODD pumps, but all utilize these pumps regularly. From the slope to the drift or the face, you will find mining pumps working to keep miners safe.
When mining underground, water will travel to the lowest point. AODD pumps are used to move this water to a central basin where it is then pumped aboveground for treatment. Common locations for dewatering include drift dewatering, face dewatering under drilling equipment, mud and muck pumping and belt dewatering.
AODD pumps are heavily used to pump mine water from trenches and low points and transfer it away from working areas, usually to a central sump. For example, they’re an excellent choice for belt head washdown applications found in coal mines. The mine water is pumped to a sump to be captured, then pumped to the surface with large multistage electric centrifugal pumps or other high-flow/high-pressure rotating pump technology.
This process keeps the working area free from deep water and helps with miner safety, protects equipment and improves productivity. In longwall coal mining, for example, the pumps keep water away from the mining “face,” especially when the face has a lower elevation than the rest of the mine. If water is deeper than the toe of a miner’s boot in working areas, safety officers can shut a mine down or issue hefty fines to the mine site.
AODD pumps are used to pump oils and lubrication for large earthmovers, excavators, scoop trams and other mining equipment. AODD pumps are used to fill the enormous tires used on excavation equipment full of calcium chloride. It’s common to find AODD pumps being used to transfer fuels like diesel at mine sites to power equipment.
For metal mining (i.e., gold, copper, nickel and others), rock and ore are crushed into powder and chemicals are added to leaching piles where chemicals are dripped onto the piles. The metals attach to the chemical and leach through to where they can be captured and then extracted from the chemical. AODD pumps dispense and transfer the leaching chemicals.
When the water is removed from the mine and brought to the surface, it’s placed into ponds where it can be treated. The water may contain contaminants, and in many cases, especially in coal mining, it can be very acidic. In order to protect the environment, the water needs to be neutralized and treated prior to being released back to the environment. AODD pumps are used to dispense neutralizing chemicals, flocculants and other process chemicals. They’re also used to transfer water to tanker trucks if water removal and treatment is off-site. AODD pumps are excellent filter-press feed pumps because they can run until deadhead, delivering a dry cake at the end of the process, saving the end user money on disposal.
AODD pumps are an ideal choice for the mining industry because they: Are run-dry capable:AODD pumps will not be damaged if they run dry intermittently. Pumps running dry are very common, especially in sump dewatering and tanker unloading applications. Can handle solids: They can pass solids without damage to the pump. Ball valve units can handle solids up to nearly 0.75” (19 mm) in diameter, and flap valve units can pass nearly line-sized semi-solids. Are self-priming:Unlike some other pumping technologies, AODD pumps are self-priming and do not require positive inlet pressure to prime. Deadhead safely: AODD pumps can be deadheaded with no pump or product damage. Have excellent chemical and temperature resistance: AODD pumps can be manufactured out of a wide range of materials so that they can handle a broad array of fluids and temperature ranges. Require no electricity: AODD pumps require no electricity and can be grounded for safe, reliable operation in explosive environments. This is critical for safety when pumping flammable liquids or when a pump is in an environment where fumes are present. Are submersible: They can be submerged completely and safely with no performance issues. Can handle a wide range of viscosities, pressures and flow rates: With flow rates of up to 280 gpm (1,060 lpm), AODD pumps provide a wide range of flows. They can handle pressures up to 125 psi (8.6 bar) and just about any fluid that can flow up to 90,000 cSt (415,500 SSU). Are portable: They can be easily moved and only require compressed air to operate. Are easy to install: AODD pumps do not need to be laser aligned and do not require complex controls to operate effectively. They simply need air supply. Are easy to repair:AODD pumps are very simple by design and can be easily repaired on location without extensive training or the need for sophisticated tools. Are available in high-pressure pump options:2:1 ratio pump units are available when pumping fluid long distances or long vertical distances. They’re also used for more viscous products like mine roof bolting epoxies or, in some cases, filter press feed pumps.
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