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Relationship between coking coal index and price
Y value is the thickness of stratum corneum.

Generally, coking coal is above 14, which is reserved in the contract.

If you want to improve the Y value, you must add fat coal or main coke clean coal, which will inevitably cause changes in G and V ... If the change is not big, it will not affect the price.

General coking coal: y>16g & gt85a <; 10.5V & lt; 28

Fat coal: Y & gt20 & gt90a <; 10.5V & gt; 28

1/3 coking coal: y>14g & gt75a & lt10.528 < V & lt37

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