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Jiangsu jinzhaochuan carbon products co. LTD

Guanji mineral products of Lianyungang

Contact: General Wu

Contact number:

Fifteen billion fifty million nine hundred and sixteen thousand seven hundred and eighty-nine

Consultation hotline:

0518-87808797

Website:en.gjmetals.com

Address: No..11, Quyang East Industrial Park, Donghai County, Lianyungang City, Jiangsu Province


Is calcined petroleum coke dangerous?

2019-10-08
times

Graphitized petroleum coke factory


Petroleum coke is a product formed by separating light and heavy oil from crude oil by distillation and then transformed into heavy oil by hot cracking. From the appearance, coke is a black block (or particle) of irregular shape and size, with metallic luster. 

The particles of coke have a porous structure, the main element composition is carbon, accounting for 80wt% (WT is the abbreviation for Weight means weight percentage content. 5WT% is equivalent to 50000PPM (PPM is in millions). 

The rest are hydrogen / oxygen / nitrogen / sulfur and metal elements. 

Petroleum coke has its unique physical / chemical and mechanical properties. It is the non-volatile carbon in the heating part. Volatiles and mineral impurities (sulfur / metal compounds / water / ash, etc.) determine the chemical properties of coke. 

Graphitized petroleum coke is a hard solid petroleum product of black or dark gray, with metallic luster and porosity, which is composed of fine graphite crystals to form granular, columnar or acicular carbon. 

For more information on oil products, please pay attention to WeChat official oil circle account is ypq0910 petroleum coke components are hydrocarbons, containing carbon 90-97%, hydrogen 1.5-8%, as well as nitrogen, chlorine, sulfur and heavy metal compounds. 

Petroleum coke is a by-product of the cracking of feedstock oil of delayed coking unit to produce light oil at high temperature. 

The output of petroleum coke is about 25-30% of the raw oil. 

Its low calorific value is about 1.52 times that of coal, the ash content is less than 0.5%, the volatile content is about 11%, and the quality is close to that of anthracite. 

The main uses of petroleum coke are pre-baked anode and anode paste used in electrolytic aluminum, carbonization agent in carbon industry, graphite electrode, smelting industrial silicon and fuel, etc. 

Calcined petroleum coke is calcined in order to meet the requirements of graphite electrode for steelmaking or anode paste (melting electrode) for making aluminum and magnesium. 

The calcination temperature is generally about 1300 ℃. The purpose is to remove the volatile components of petroleum coke as far as possible. 

In this way, the hydrogen content of petroleum coke reproducts can be reduced, the graphitization degree of petroleum coke can be improved, the high temperature strength and heat resistance of graphite electrode can be improved, and the electrical conductivity of graphite electrode can be improved. 

Calcined coke is mainly used in the production of graphite electrode, carbon paste products, diamond sand, food grade phosphorus industry, metallurgical industry and calcium carbide, among which graphite electrode is the most widely used. 

The coke can be directly used as calcium carbide as calcium carbide main material and silicon carbide and boron carbide as grinding materials without calcination. 

It can also be directly used as coke for blast furnace in metallurgical industry or carbon brick for blast furnace wall, and it can also be used as dense coke for casting process.

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