Structural properties comprise the porosity, pore-cell wall thickness and pore sizes, while textures consist of the carbon forms in the coke. Petroleum coke is the solid residue obtained in oil refining, which resembles coke but contains too many impurities to be useful in metallurgical applications.
The coke properties comprise the size analysis, the cold strength M40, M10 and hot strength CRI, CSR properties and structural properties such as coke structure and texture.
It was concluded that the amount of low roundness pores is one of the factors determining coke strength.
The coking properties of blend coal are as follows; volatile matter VMash, plastic range PR and maximum fluidity MF varied from A method for automatic image analysis of coke texture was developed Eilertsen et al.
The existing literature reveals that most of these research efforts are essentially focused on the image analysis of coke structure, optical texture Das et al.
The micro structural features of a good coke included a relatively thick coke wall and a pore size distribution. The porous structure of coke such as was porosity, pore wall thickness, roundness and perimeter was observed by means of reflected light optical microscope through image analysis method.
The coke is cooled down under the inert atmosphere and the loss in weight expressed as a percent is the reactivity. Of the above mentioned three roles of BF coke, the first two can be substituted by oil, gas, plastics and non-coking coals.
Metallurgical coke is used as a fuel and as a reducing agent in smelting iron ore in a blast furnace.