When Pennsylvania introduced the original Frozen Coal Cracker1 in 1941, it was quickly adopted by the power generation industry. Over the following decades, Pennsylvania has made continuous refinements to the design...refinements which today make this unit the most effective machine available for reducing frozen coal. The Pennsylvania Model FCC continues to be recognized as the standard unit for this application.
1The term "Frozen Coal Cracker" was originated by and is a trademark of Pennsylvania Crusher Corporation.
Frozen Coal - Causes and EffectsStudies found that as coal freezes in rail cars the strength of this bond increases as the free moisture increases. The compressive strength of the frozen coal also increases as temperatures drop. At -20°F, it has about 80% greater strength than it has at +15°F. Frozen lumps as large as 4 feet thick are not uncommon in rotary dump operations, creating serious jam-ups in hoppers, in conveying systems and transfer points. In addition to jamming the coal handling system, frozen coal chunks frequently require that conveying systems be pitched at inclines no greater than 15 degrees. This requires longer conveyors and more space for the entire coal handling system.
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The Pennsylvania Frozen Coal Cracker ConceptIn PCC's analyses of this problem it was determined that most of the major problems caused by frozen coal would be eliminated by a system which performed as follows:
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When Pennsylvania introduced the original Frozen Coal Cracker1 in 1941, it was quickly adopted by the power generation industry. Over the following decades, Pennsylvania has made continuous refinements to the design...refinements which today make this unit the most effective machine available for reducing frozen coal. The Pennsylvania Model FCC continues to be recognized as the standard unit for this application.
1The term "Frozen Coal Cracker" was originated by and is a trademark of Pennsylvania Crusher Corporation.
Frozen Coal - Causes and EffectsStudies found that as coal freezes in rail cars the strength of this bond increases as the free moisture increases. The compressive strength of the frozen coal also increases as temperatures drop. At -20°F, it has about 80% greater strength than it has at +15°F. Frozen lumps as large as 4 feet thick are not uncommon in rotary dump operations, creating serious jam-ups in hoppers, in conveying systems and transfer points. In addition to jamming the coal handling system, frozen coal chunks frequently require that conveying systems be pitched at inclines no greater than 15 degrees. This requires longer conveyors and more space for the entire coal handling system.
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The Pennsylvania Frozen Coal Cracker ConceptIn PCC's analyses of this problem it was determined that most of the major problems caused by frozen coal would be eliminated by a system which performed as follows:
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