It is important to understand the physical properties of calcined coal (CPCoke), as they are vital for its use when producing graphite or carbon. The calcination process significantly alters the structure and elemental composition of carbonaceous raw materials, enhancing their physicochemical properties. The operating conditions for the calcination procedure determine the quality and strength of calcined carbon. The temperature of calcined slag during the calcination stage is crucial in controlling its mechanical strength and microstructure.
In this article the authors investigate whether the calcination heat affects the physical and chemical properties of calcined normal grade petroleum used as carburizers. The authors performed a set of tests using samples of commercial grade petroleum coal obtained from delayed coking in oil refining plants. The results of the tests showed that calcined coal was suitable for use in the foundry as a carburizer. The tests on calcined coal also showed that it had an adequate carbon content. This is necessary for melt carburizing. The analysis of calcined coal also revealed that it contained low levels of moisture and volatile matter, which is important for the quality of good carburizer.
Calcined coke, also known as calcined coke, is a solid by-product of the thermal cracking process used to treat heavy petroleum residues and process streams. It is a dark gray or black, hard and brittle material with a metal luster. It consists of 90%-97% Carbon, 1.5%-8.0% Hydrogen, and other heavy materials. The calcination process of petroleum coke removes the majority of water and volatile substances in the carbonaceous material. This results in a dense and strong material.
The calcination of coke can also be controlled by adjusting the gas flow, which will influence its thermal behaviour. To investigate the issue, the calcination temp of coke has been measured in both the internal and external heat-exchangers of a large-scale industrial reactor. This was done using a new technique that measures surface temperatures of the coke using an optical magnifier.
The study shows that the calcination temperatures of coke can be affected by the gas flow rate. This in turn affects their mechanical and thermal properties. The calcination of coke is also affected by the porosity. When the porosity is increased, the total heat quantity initially generated decreases and the heat transfer temperature difference average decreases. This is mainly caused by the fact that calcined coke voids are a convective source of heat. The average heat transfer coefficient also decreases with increasing velocity porosity.
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