Definition of petroleum coke

Petroleum coke is a process in which heavy crude oil is separated from crude oil by distillation, and heavy oil is then thermally cracked. In terms of appearance, coke is irregular in shape and black in size. Bulk (or particles), metallic luster, coke particles with porous structure, the main element composition of carbon, accounting for more than 80wt%, the rest is hydrogen, oxygen, nitrogen, * and metal elements. Petroleum coke has its unique physical, chemical, and mechanical properties. It is a non-volatile carbon that generates heat. Volatile matter and mineral impurities (*, metal compounds, water, ash, etc.) These indicators determine the chemical properties of coke.

I. Classification and Nature of Petroleum Coke The form of petroleum coke varies with the process, operating conditions, and the nature of the feed. Petroleum cokes produced from petroleum coke plants are called green cokes. They contain volatiles of some uncarbonized hydrocarbon compounds. Coking can be used as a fuel-grade petroleum coke. If you want to make an aluminum anode or Electrodes for steelmaking require high-temperature calcinations to complete carbonization and reduce the amount of volatiles to a minimum.

The appearance of the coke produced in most petroleum coke working sites is an irregular block of black-brown porous solids, which is also known as sponge coke. The second higher quality petroleum coke is called needle coke (neEDLe coke) and sponge coke ratio. Because of its lower electrical resistance and thermal expansion coefficient, it is more suitable as an electrode. Sometimes another hard oil coke can also be produced, called shot coke. This kind of coke shape, such as projectiles, has a small surface area and is not easily coked, so its use is limited.

Petroleum coke has its unique physical, chemical, and mechanical properties. It is a non-volatile carbon that generates heat. Volatile matter and mineral impurities (*, metal compounds, water, ash, etc.) These indicators determine the chemical properties of coke. Porosity and density in the physical properties determine the reactivity and thermophysical properties of coke. Mechanical properties include hardness, wear resistance, strength and other mechanical properties, particle composition and other processing and transportation, stacking, storage and other properties.

Second, the petroleum coke process petroleum coke is crude oil by distillation of heavy oil or other heavy oil as raw material, with high flow through the 500 °C ± 1 °C heating furnace tube, so that the cracking and condensation reaction in the coke tower, and then After producing coke for a certain period of time, cold coke and coke are produced to produce petroleum coke.

Uses: Mainly used for making carbon products, such as graphite electrodes, anode arcs, providing steel-making, non-ferrous metals, aluminum-making purposes; Preparation of carbonized silicon products, such as various grinding wheels, sand, sandpaper, etc.; Preparation of products for calcium carbide For the production of synthetic fibers, acetylene and other products; can also be used as fuel.

Petroleum coke (Petrocolum coke) is a process in which crude oil is separated from light and heavy oils by distillation, and heavy oils are then subjected to thermal cracking. From the appearance point of view, coke is irregular in shape and black in size. Bulk (or particles), metallic luster, coke particles with porous structure, the main element composition of carbon, accounting for more than 80wt%, the rest is hydrogen, oxygen, nitrogen, * and metals.

Third, the use of petroleum coke 1. Can be used as boilers, steam cogeneration, cement kilns and other fuels 2. Aluminizing anode electrode 3 was produced. Directly as a carbon source for chemicals such as elemental phosphorus, calcium carbide, and silicon carbide4. The electrode 5 is produced as an electric furnace for producing elements phosphorus, titanium dioxide, carbonized, and silicon carbide. Comparing Graphite IV, Petroleum Coke and Coal Comparative Project Petroleum Coke Calorific Value, Btu/lb 13,000-15,000 10,500-13,000

Volatiles, wt%4-18 6-40

*part, wt%2.5-5.5+0.7-4

Ash, wt% 0.3-0.5 3-19

Moisture, wt%8 1.5-5

Carbon content, wt% 82-97 49-79

Density, g/cm3 1.2-1.8 1.36

Hardness (HGI) 35-80 60-7