Fuel coke (electrode coke) is a solid substance obtained by coking coal ash. In appearance it is a lump of steel-grey colour of various shapes and sizes. Elemental composition in %: carbon - about 97, hydrogen - about 11, oxygen 0,70, sulphur - about 0,60, nitrogen - about - 1,20.
Peck is a product of rectification of coal tar. It is a solid combustible toxic substance
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