Calcined Petroleum Coke (CPC) is a crucial industrial material, derived from raw petroleum coke through a high-temperature process. Uncover the transformative journey of raw material to vital industrial resource.
Intro
Calcined petroleum coke, as its name implied, it is petroleum coke by calcining when producing graphite electrode. In order to reduce volatile matter (V.M.) as far as possible, petroleum coke should be calcined. After calcining, hydrogen content in product is low so that it can be used in graphite electrode to consummate conductivity for electrode.
Speaking of calcined petroleum coke, we have to introduce its raw material, that is petroleum coke.
Petroleum coke is also called petcoke or pet coke, it is a kind of solid petroleum products. Generally speaking, it is black or dark gray with metallic luster and has many holes. Retrospect our common knowledge, we believe absolutely that you can recall that petroleum is a type of organic compounds. Likewise, petcoke also belongs to organic compound that it is made up of carbon and hydrogen. Including, most of it is carbon and remains are hydrogen, nitrogen, chlorine, sulphur and other heavy metal compounds.
Characteristics
From its property, petroleum coke is a by-product during pyrolysis under high temperature. Its yield is about quarter of crude oil. Ash matter is less than 0.5% and volatile matter is approximately 11%, quality approaches anthracite.
Use
After we mentioned basic information above, we will introduce its uses. Prebaked anode, recarburizer, graphite electrode, fuel and so on are main uses for petroleum coke.
Classification
When it comes to classification, many things have different classifications, petroleum coke is no exception. Concretely speaking, it can be divided into 4 types approximately according to structure. Respectively, needle coke, sponge coke, shot coke and powder coke.
Needle coke: it has obvious needle structure and fiber texture. It mainly used in high power and ultra high power graphite electrode. However, it is noted that it has strict quality specification in sulphur content, ash matter, volatile matter and other aspects.
Sponge coke: if you listen to it at the first time, maybe you will think that it looks like sponge. In fact, its shape looked like sponge. It usually used in calcining or used as raw material for calcined petroleum coke as a result of high sulphur content. After calcining, its impurities are removed. Thus, it can be used in refining aluminium and carbon industry.
Shot coke: according to its name, maybe you will be interested in it. Nevertheless, actually, it also has another name called spherical coke because of its shape. Diameter for shot coke ranged from 0.6 mm to 30 mm approximately. Because it is full of impurities with high sulphur and other impurities, it is only used as industrial fuel for power station or cement plant.
Powder coke: as its name implied, shape of it looks like powder. And its size is smaller than others we mentioned above, diameter ranged from about 0.1 mm to 0.4 mm. However, every coin has two sides, it is unsuitable to use in electrode preparation and carbon industry directly due to high volatile matter and coefficient of thermal expansion (CTE).
Generally speaking, according to different standards, it have different types. High sulphur coke and low sulphur coke are two types by another classification standard. Different types have different uses. Contrapose high-quality low sulphur coke, its sulphur content less than 0.5% usually, graphite electrode and recarburizer are produced by it. What’s more, ordinary low sulphur coke, that is sulphur content less than 1.5%, it is always used to produce prebaked anode. As for low-quality petcoke, it mainly used in producing industrial silicon and anode paste. While, fuel for cement plant and power station used by high sulphur coke.
In conclusion, the significance of calcined petroleum coke lies in its diverse applications across industries, driving innovation and progress. Explore the multifaceted nature of CPC, a key player in modern industrial processes.
