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Pulverizer Sampling

All the major types of pulverizers have been sampled, including this CE Raymond 633 mill in a power plant located in north central Pennsylvania.  During the sampling process, material was extracted from the mills and taken to EXPORTech's facilities for magnetic separation.

Utility/Company	Location	Mill
Allegheny Energy	PA	Foster Wheeler D-8 Ball Mill
	PA	CE Raymond 723 Table Mill
	WV	CE Raymond 823 Bowl Mill
	WV	B&W MPS 89 Roller Mill
Ameren/CIPS	IL	CE Raymond 63 Bowl Mill
FirstEnergy	OH	B&W MPS 89K Roller Mill
Reliant Energy	PA	CE Raymond 633 Bowl Mill
Bradley Pulverizer Co.	PA	Hercules 25 hp Ring/Roller Mill

The table below illustrates the quality of material extracted from the mill and rejected from the magnetic separator.  The Feed material is that fed to the mill, Mill Reject is the material extracted from the mill, and MS Reject is the material rejected from the magnetic separator.  The MS Reject material does not go on to the burner.  The Lower Kittanning coal is a raw coal from north central Pennsylvania, the cleaned Pittsburgh seam coal is from southwest Pennsylvania, and the blend of raw and cleaned Pittsburgh coal is from northern West Virginia.  Note the difference in the HGI of the feed and the MS Reject of the blend.