Home Mines and Minerals Coal Mines Production of Coal and Lignite
Sample Data Format
 Ash Contents of Different Grades of Coking Coal Produced by Coal India Limited (CIL) and Subsidiaries 
(2002) 
 Grades of Coking Coal  Ash Content 
 Steel Grade-I  Not exceeding 15% 
 Steel Grade-II  Exceeding 15% but not exceeding 18% 
 Washery Grade-I  Exceeding 18% but not exceeding 21% 
 Washery Grade-II  Exceeding 21% but not exceeding 24% 
 Washery Grade-III  Exceeding 24% but not exceeding 28% 
 Washery Grade-IV  Exceeding 28% but not exceeding 35% 
 
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