What is the main use of the coke produced in delayed coking units?

Petcoke can be used in various industries; petcoke used as fuel in power plants and cement factories requires a high calorific value and good grindability； Petcoke used as raw material in aluminum plants, steel plants, or carbon plants requires control of its sulfur content and volatiles, whether it is used as a raw material for anode pastes and artificial graphite electrodes or for the production of carbides. For petcoke intended as raw material for electrode production, the metal content must also be controlled. 1.1 Petroleum coke is used as fuel in CFB boilers in power plants. To support the processing of imported sulfur-containing crude oil and the improvement of oil product quality, it is necessary for enterprises located along the coasts and rivers to install new or expand existing delayed coking units; it is estimated that the production volume of petroleum coke will reach 3,600 kt. To process this high-sulfur, low-cost petroleum coke, advanced circulating fluidized bed technology can be employed, along with the construction of a series of CFB boilers that use petroleum coke as raw material, thereby providing refineries with low-cost steam, electricity, and hydrogen. This achieves three goals at once: it utilizes cheap high-sulfur petroleum coke, meets the steam and electricity needs of new projects undertaken by enterprises, and can also replace some existing oil-fired boilers, thereby saving valuable heavy oil resources. In 2000, Wuhan Petrochemical Plant built a new circulating bed boiler capable of burning petroleum coke at a rate of 75 t/h. This boiler uses limestone as a bed material during combustion to achieve desulfurization inside the furnace, while also reducing NOx emissions; its combustion efficiency can reach 95%–99%. Zhenhai Petrochemical processes large quantities of foreign sulfur-containing crude oil, producing hundreds of thousands of tons of high-sulfur petroleum coke each year. Due to the high sulfur content in this petroleum coke, it is difficult to handle and its utility value is limited. In 1999, high-sulfur petroleum coke was used for power generation via CFB boiler technology, with the cost per unit of electricity being only 0.18 yuan, whereas the cost of generating electricity from residue oil was as high as 0.58 yuan; 240 kt of petroleum coke were utilized in 2000. Shanghai Petrochemical is expanding its thermal power plant, using CFB boilers that can process 280 kt of high-sulfur petroleum coke per year. Additionally, high-sulfur coke is also used in the production of industrial silicon, with a consumption of 300 kg per ton of industrial silicon. 1.2 Petroleum coke is used as a raw material for anode pastes and graphite electrodes in smelting plants. Petroleum coke with a low sulfur content can be used in smelting plants as a material for manufacturing electrodes. Carbon factories use petroleum coke to produce anode paste for aluminum plants, as well as graphite electrodes for steel plants. The sulfur content of petroleum coke affects its use and the quality of carbon products made from it. Especially in the production of graphite electrodes, sulfur content is an important parameter; too high a sulfur content can directly affect the quality of the graphite electrodes as well as the quality of steel manufacturing. At high temperatures above 500°C, sulfur within the graphite electrode is decomposed; an excess of sulfur causes the electrode crystal to expand, leading to contraction of the electrode and the formation of cracks, which in severe cases can render the electrode unusable. In the production of graphite electrodes, the sulfur content of petroleum coke affects power consumption; producing electrodes from petroleum coke with a sulfur content of 1.0% requires about 9% more electricity per ton compared to using petroleum coke with a sulfur content of 0.5%. When used as a raw material for anode paste, the sulfur content of petroleum coke also has a significant impact on power consumption.

　　　　　　　　　　　　　　　1) Fuel for steam boilers　　　　　　　1 Industrial fuel　　 2) Fuel for power plants　　　　　　　　　　　　　　　3) Fuel for cement kilns　　　　　　　　　　　　　　　4) Gas used as fuel　　　　　 2 Raw materials for gas production　 1) Syngas, used for producing chemical fertilizers and liquid fuels; petroleum coke　　　　　　　　　2) Used for hydrogen production　　　　　　　　　　 1) Blast furnace ironmaking　　　　　　3 Materials for metallurgy　　 2) Metal casting　　　　　　　　　　　　　　　　　3) Calcining of ordinary coke (1) for anode pastes in aluminum production, (2) for graphite electrodes in steelmaking　　　　　　　　　　　　　4) Calcining of needle coke (1) for high-power electrodes in steelmaking, (2) for ultra-high-power electrodes in steelmaking　　　　　　　　　　　　　1) Activated carbon as an adsorbent　　　　　　　　　　　4) Carbon materials　　 2) Calcium carbide (CaC2) used in the chemical industry　　　　　　　　　　　　　3) Emery (SiC) as an abrasive material　　　　　　5) Materials for the nuclear industry——Graphite materials for nuclear reactors　　　　　　6) Materials for the aerospace industry——Graphite control surfaces for spacecraft and rockets] This post was last edited by Hongru on 2009-3-28 14:05

China University of Petroleum (Huadong) is researching the use of coke to produce high-performance activated carbon, and the pilot tests have been completed

Our uses for oil: Part of it is used to manufacture graphite electrodes； Another portion is used as feed for CFB boilers ；

It is shipped directly from our factory, and its main uses include: fuel for power plants, fuel for cement kilns, gas for use as fuel, iron production in blast furnaces, materials for metallurgy, metal casting, and the calcination of ordinary coke as well as needle coke

Here, we sell petroleum coke directly. We considered using it as boiler fuel, but that was only when the coking coal dust had a high sulfur content.