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What is the HGI(Hard Grove Index)?
from britannica
- measurement of coal grindability
...in a laboratory mill of standard design. The percent by weight of the coal that passes through a 200-mesh sieve (a screen with openings of 74 micrometres, or 0.003 inch) is used to calculate the Hardgrove grindability index (HGI). The index is used as a guideline for sizing the grinding equipment in a coal-preparation plant.
Can you tell us the HGI for Indian coal?
Wiki User
∙ 12y ago
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