Handling Wet and Frozen Coal

Identify coal handling problems caused by wet coal. Explain how wet coal sticks to itself and to coal handling equipment. Outline procedures to prepare for wet coal problems. List methods and equipment for detecting wet coal problems. Describe how to respond to wet coal problems. Discuss ways of dealing with water accumulation. Identify coal handling problems caused by frozen coal. Explain how coal freezes and how frozen coal sticks to coal handling equipment. Outline procedures to avoid or minimize frozen coal problems. Describe mechanical methods of treating frozen coal. Identify the major parts of frozen coal crackers and traveling hammer mill crushers. Explain how frozen coal is broken up by frozen coal crackers and traveling hammer mill crushers. Describe how thawing sheds and torches are operated to heat frozen coal in railcars. State the reasons antifreeze is applied to conveyor belts. Outline a basic system for applying antifreeze to conveyor belts. Explain why coal is treated with antifreeze. Discuss how mechanical methods thermal methods and chemical methods can be used together to treat frozen coal in a coal handling system.