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What is volatile cinder? What types does it have?


Volatile cinder is the residue in the crucible after volatile determination for coal sample. It has 8 types: 1. powdery 2. adhesion 3. weakly caking 4. caking without fusion 5. caking with fusion without expansion 6. caking with slight-expansion and fusion 7. caking with medium-expansion and fusion 8. caking with strong-expansion and fusion