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Combining the Benefits of Dry and Liquid Agents for a Better Fire Suppression System

In the fire suppression industry, some have begun claiming that a liquid-only system is superior to a dual-agent system. The primary reason for this stance is the simplicity factor of using only one agent. However, this line of thought neglects to consider the fact that liquid-only systems needlessly sacrifice the benefits of A:B:C dry agent for the mere purpose of a marketing campaign.

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Innovative Rock-Dusting System to Assist with Respirable Dust Compliance

By Steve Fiscor, Editor-in-Chief

DSI Underground Systems has developed a noncombustible, non-respirable rock dust mixture (DYWIDust) and an application system (DYWIDuster). Coal operators can use the technique to convert their dry rock dust into a wet-dusting system that is dependable and user-friendly. The DYWIDuster is a hydraulically powered unit that sits in the bucket of a scoop. At the beginning of the shift, miners prepare a batch by mixing the dust with water and a polymer, and then set the system aside. They can apply the DYWIDust as needed as the continuous miner moves between headings without having to withdraw the crew from the section.

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Increase Fuel Choices While Maintaining a Slagging and Fouling-Free Boiler

By Dr. Murielle Perronnet, Dr. Adam Campen, David Osby and Nicole Roney

Fluctuating fuel prices, increasingly restrictive emission regulations, and an unpredictable economy are driving energy producers to make operational changes such as burning non-design coals to reduce SOx, NOx, Hg and CO, while also producing power profitably.

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Screening System Targets Specific Needs

By Steve Fiscor, Editor-in-Chief

Vibratory screening machines serve several purposes in the prep plant. On the initial cut, they scalp the rock and other tramp materials from the run-of-mine (RoM) product stream. Screens then divert product to different separation processes based on size. Next, they dewater clean coal and refuse allowing the plant to recycle the water and reclaim the magnetite.

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Moisture-tolerant Rock Dust Could Improve Safety Underground

?Imerys has developed a moisture-tolerant rock dust.For many years, limestone-based rock dust has been the product of choice for North American coal mine explosion abatement. Typically, limestone products are readily available throughout North America and when processed to meet government specifications, adequately prevent the propagation of a coal dust explosion.

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