Determination of Alkali Resistance of Blast Furnace Coke
Cokes are vitally important solid fuels in the steelmaking process, and their properties will determine the extent of their utilization. These properties include difficult parameters such as density, porosity, and chemical structure. However, one of the most important factors of cokes is the resistance to alkali. This quantity is of great importance in the steel-making process and is especially critical in the production of blast furnace coke. It is therefore essential for industry to have accurate and reliable methods for assessing alkali resistance in order to make informed decisions about the impact of the quality of cokes on the steel-making process.
This paper focuses on the determination of the resistance to alkali of blast furnace coke. The most frequently used technique to measure alkali resistance of cokes is the ‘slaking test’. In this method, cokes are heated to a certain temperature, after which they are subjected to a thermal shock by immersing them in water. Alkali resistance of the cokes is then evaluated by measuring the thermal shock that has occurred as a result of the slaking. The slaking test can also be used to determine the composition of the cokes, and the various properties of cokes that affect the resistance to alkali, such as ash content and air permeability.
Another method that can be used to determine the resistance to alkali of blast furnace coke is the determination of the resistance to abrasion or erosion. This involves the application of abrasive forces to the coke, usually through grinding or hammering, and then measuring the extent to which the coke has been abraded or eroded. The abrasion or erosion data collected can then be used to evaluate the resistance to alkali of the cokes in question.
A third method for measuring the resistance to alkali of blast furnace coke is the ‘thermodynamic analysis’. This method uses thermodynamic calculations to predict the behavior of cokes under certain conditions. The thermodynamic analysis is used to predict the temperature and pressure at which cokes will react with alkalines to form alkali-resistant compounds. The thermodynamic properties of cokes are then used to predict their performance when exposed to alkalines. Thermodynamic analysis is also used to predict the reactivity of cokes when they are subjected to processes such as slaking, crushing, and milling.
The fourth method for measuring the resistance to alkali of blast furnace coke is to use electrochemical methods. This technique involves measuring the impacts of electrical currents, electrical potentials, and electrolytes on the cokes in question. Electrochemical methods are used to evaluate the electrochemical resistance and stability of cokes and to determine the conductivity of cokes. The results from electrochemical measurements can be used to predict the resistance to alkali of cokes.
Finally, the fifth method for determining the resistance to alkali of blast furnace coke is to use X-ray crystallography. This technique involves the use of X-ray diffraction to measure the crystalline structure of the cokes and to determine the reaction of cokes when they are subjected to alkalines. X-ray crystallography can be used to evaluate the atomic structure, molecular weight, and degree of strain of the cokes, and to measure the crystallinity of cokes and the degree of crystallization of cokes.
In conclusion, the determination of alkali resistance of blast furnace coke is essential for the steel-making process. Various techniques are available for measuring the resistance to alkali of cokes, namely the slaking test, abrasion determination, thermodynamic analysis, electrochemical methods, and X-ray crystallography. These techniques provide accurate and reliable results and can be used to determine the composition and properties of cokes in order to make informed decisions about the impact of the quality of cokes on the steel-making process.
