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Pet coke is a carbonaceous solid derived from oil refinery cracking processes. Marketable coke is coke that is relatively pure carbon and can be sold for use as fuel, in the manufacture of dry cells, electrodes, etc. Needle coke, also called acicular coke, is a highly crystalline petroleum coke used in the production of electrodes for the steel and aluminum industries. Catalyst coke is coke that has deposited on the catalysts used in oil refining, such as those in a catalytic cracker. This coke is impure and is only used for fuel. Petroleum coke's high heat and low ash make a good fuel for power generation in coal-fired boilers but is high in sulphur and low in volatile content which pose some environmental and technical problems with its combustion.

Metallurgical coke is produced by destructive distillation of coal in coke ovens. Prepared coal is "coked" or heated in an oxygen-free atmosphere until all volatile components in the coal evapoarate. The remaining material is called "coke". Most metallurgical coke is used in iron and steel industry processes such as blast furnaces, sinter plants, and foundries to reduce iron ore to iron. Over 90% of the total metallurgical coke production is dedicated to blast furnace operations.

2006-08-30 21:13:45 · answer #1 · answered by soymilk 2 · 1 0

Excellent answer "Soymilk" I would only add that metallurgical coke is low in sulfur.

2006-08-31 05:00:04 · answer #2 · answered by Bazza66 3 · 0 0

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