Mining
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Project Profile: 1-on-2 Feeding PRB Coal to Two Crushers
Challenge: A Powder River Basin coal mine needed to control material flow to their two large roll crushers. Mine operators wanted a controllable split to help deliver coal evenly to the rail car loading operation.
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Project Profile: Potash Diverting Transfer
Challenge: The potash mine was experiencing a dramatic drop in productivity every time a shift change occurred, with production curtailed while miners exited and entered the mine. This resulted in a loss of productivity for the mine operations.
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Project Profile: 90° Potash Mine Transfer
Challenge: After experiencing increased demand at the mine, the existing transfer chutes were having difficulties with the increased material being conveyed. Specific problems included frequent plugging of the transfers and issues with spillage and dust generation.
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Processing plants
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Project Profile: 89 Percent Decrease in Dust Generation
Challenge: The power plant's outdated transfer chutes to manage North American Powder River Basin Coal failed to meet OSHA's respirable dust level requirements, risking employee health.
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Project Profile: Barge Unloading to Conveyor
Challenge: The old feeder and chutes on a barge unloading system could not consistently meet the desired feed rate of 1,200 tph and was prone to “flushing” wet material. Spillage and chute problems (buildup, plugging, and leaking) were common. Frequently, these problems resulted in costly delays in ship unloading operations. Additionally, coal spilled on the ground caused a safety hazard, and coal washed into the river was a violation. The facility incurred excessive housekeeping costs to keep the area around the chute in a suitable condition.
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Project Profile: Granulators to Conveyors at Midwest Power Plant
Challenge: The old chutes were prone to plugging and material build-up. There was a large amount of dust generated and spillage through the entire load zones of the two conveyors. Additionally, coal spilled on the floor and catwalk caused a severe safety hazard to personnel. Because of this, the facility had excessive housekeeping costs to ensure the area around the chute was kept in a suitable condition.
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Project Profile: Time Weighted Average Dust Levels
Challenge: A power plant was adding North American Powder River Basin (PRB) coal to its fuel mixture. Management was concerned about the safety issues associated with the combustible nature of the PRB coal dust and wanted to take steps to minimize it. The new chute systems had to contractually deliver dust generation performance below the Occupational Safety and Health Administration (OSHA) respirable dust standard of 2.0 mg/m3 on an eight hour time weighted average (TWA).
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Transportation Facilities
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Project Profile: Tripper to Stacker/Bypass – 17 Pecent Throughput Increase
Challenge: Iron ore pellets can cause plugging at higher throughputs, which the port's operations group observed as their volumes increased. The old chute also resulted in unacceptable levels of spillage and dust.
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Project Profile: Sulphur Transfer Tower
Challenge: Operators at a sulphur export terminal weren’t satisfied with the existing transfer chute because there was a significant amount of airborne dust that left a yellow haze on everything. Not only was this labor intensive and expensive to clean and maintain, but it resulted in hazardous working conditions and complaints from the terminal’s neighbors.
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Project Profile: Reclaimer
Challenge: As part of a terminal capacity upgrade/expansion, a design was requested for a reclaimer transfer chute system with boom arm pivoting up and down and, at the same time, slewing around the vertical axis. The 2000mm wide feed conveyor runs at 4.2m/s and the 1600mm wide receiving conveyor at 6.1m/s.
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Project Profile: Ship Loading Various Capacity And Speed Transfer Chutes
Challenge: As part of a terminal capacity upgrade, this transfer was required to increase capacity to 8000tph using the same conveyors at approximately double their original speed. The 1800mm wide feed conveyor runs at 8.5m/s and the receiving conveyor at 9.1m/s. Additionally, the transfer must be capable of running at various speeds and capacities.
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