Transitions in coal preparation plant at minami Ohyubari coal mine.

Canaries in the coal mine.

Up until 30 years ago, coalminers relied on canaries as warning systems against harmful gases and pollutants underground. The miners listened for birdsong and if the birds fell silent, then they knew there was danger to their health and to take action. Today we have much more sophisticated information and reporting on the quality of air. We know precisely the levels and composition of pollutant...

High-tech coal mine canary.

High-tech coal mine canary One of coal mining's earliest systems for warning of the presence of methane gas, the canary in the coal mine, though low-tech, was extremely effective and rather easy to read: if the bird died, miners had to get out of the shaft. Today, the search for means to monitor for signs of danger continues. At an annual checkup, one could be given a whole battery of tests, ea...

A Novel Approach for Beneficiation and Dewatering of Coal Fines for Indian Coal Preparation Plant

An attempt has been made to beneficiate the Indian coking coal fines by a combination of Spiral, flotation and Oleo Flotation processes. Beneficiation studies were also carried out on 0.5mm coal fines using flotation and oleo flotation by splitting at size 0.063mm.Size fraction of 0.5mm-0.063mm and -0.063mm size were treated in flotation and Oleo flotation respectively. The washability studies ...

The Canary in the Coal Mine.

Courage/Bravery—Bitty was determined to escape his cage and become free so that he could help the other canaries and the miners. He faced many dangers but never gave up fighting for what he believed. What causes would you fight for? What kind of power do you feel you have to change things that you think are unfair? Do you think that influencing legislators is a good way to change things? Why or...

Preparation and Transportation of Coal