Petroleum coke (often abbreviated pet coke or petcoke) is a carbonaceous solid delivered from oil refinery coker units or other cracking processes. Coking processes that can be employed for making petcoke include contact coking, fluid coking, flexicoking and delayed coking. Other coke has traditionally been delivered from coal.

This coke can either be fuel grade (high in sulfur and metals) or anode grade (low in sulfur and metals). The raw coke directly out of the coker is often referred to as green coke.In this context, "green" means unprocessed. The further processing of green coke by calcining in a rotary kiln removes residual volatile hydrocarbons from the coke. The calcined petroleum coke can be further processed in an anode baking oven in order to produce anode coke of the desired shape and physical properties. The anodes are mainly used in the aluminium and steel industry


Sulfur – approximately half of the sulfur produced is used for manufacture of a sulfuric acid.

Sulfur is used for vulcanization of rubber, as a fungicide in agriculture. Also sulfur in the composition ceramicanda compositions used to produce asphalt and, as alternate to Portland cement to produce concrete. Sulfur is used for the production of pyrotechnic compositions previously used in the manufacture of gunpowder, used for the production of matches.

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