If sulphur content is high what is the grading for coal?

Has no effect on coal grades

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Lowers the coal grade

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Improves the coal grade

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Improves the ash quality

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Solution

The correct option is B
Lowers the coal grade

The grading of coal is mostly carried out from moisture content and to some extent the sulphur. High quantity or percentage of sulphur in coal lowers the grading as the presence of sulphur in coal makes it quite acidic when used in blast furnace for steel reduction process. The production of sulphur dioxide and sulphites degrades the final ash quality as well.

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