One,Properties of a, petroleum coke
Petroleum coke is black or dark grey hard solid petroleum products, with a metallic luster, a porous graphite crystal formation, is composed of tiny carbon precursor granular, columnar or needle. Petroleum coke components are hydrocarbons, carbon containing 90 - 97%, 1.5 - 8% of hydrogen, nitrogen, sulfur, chlorine containing compounds and heavy metals.
Petroleum coke is a by-product of feedstock of delayed coking unit production of light oil cracking at high temperature. Petroleum coke yield is about raw oil 25-30%. The low calorific value is about 1.5-2 times of coal, ash content is not more than 0.5%, volatile content is about 11%, close to the coal quality.
Two, the quality standard of petroleum coke
Delayed coke refers to the delayed coking production coke, coke or common, there is no corresponding national standards. Current domestic production enterprises mainly according to Sinopec Corporation set industry standards SH052792 production. The standard according to the classification of sulfur content in petroleum coke.
Three, the main use of petroleum coke
The main purpose of petroleum coke is used in aluminum electrolysis prebaked anodes and anode paste, carbon industry production increased carbon agent, graphite electrode, industrial silicon smelting and fuel etc..
According to the structure and appearance of petroleum coke, petroleum coke products can be divided into the needle coke, coke, coke and projectile sponge coke powder 4:
According to the sulfur content of the different, can be divided into high sulfur coke (above the sulfur content and low sulfur petroleum coke (3%) following sulfur content of 3%). Low sulfur petroleum coke can be used as an anode paste and pre baked anode for aluminum and graphite electrode used for steel mills use. The high-quality low sulfur petroleum coke (sulfur content less than 0.5%) can be used in the production of graphite electrodes and increased carbon agent. The general quality of low sulfur petroleum coke (sulfur content less than 1.5%) is commonly used in production of prebaked anode. While the low quality of petroleum coke is mainly used in industrial silicon smelting and production of anode paste. The high sulfur coke is generally used as a cement factory and power plant fuel.
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