Fuels and Combustion
A good metallurgical coke should have very low

Fusion point of its ash
Hardness & strength
Sulphur & phosphorous content
Porosity

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Fuels and Combustion
Beehive coke oven

Gives larger yield of coke (around 85%) as compared to by-product ovens
Takes 2-3 days for coking of coal but requires no external fuel for heating
Produces coke with very poor strength
Facilitates by-products recovery

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