Introduction
Iron-making is an important process for the steel industry, and coke is the main raw material . Coke oven gas (COG) is a by-product of coking during the iron-making process and is composed mainly of CO and H2. The proper control over the coking process is important to ensure that the quality of the coking products is of good quality. The aim of this study is to evaluate the use of CO concentration curve in monitoring coking process to improve the quality of coking product.
Coke Oven Gas Formation
Coke oven gas is produced during the coking process, which involves heating coal in a closed chamber. During coking of the coal, some of the volatiles are expelled from the coal and pass through liquid or gas states and finally condense on the walls of the coking chamber. The gas produced is composed mainly of CO and H2 and also contains a number of other volatile organic compounds(VOCs) including kerosene, benzene, toluene, ethylene and ethane. The concentration of these VOCs changes with the coking conditions such as temperature and the time of the coking process.
CO concentration curve
The variation of the CO concentration in the COG during the coking process can be used to monitor the process and its efficiency. The CO concentration in the COG should increase as coking proceeds, reaching a maximum at the end of the process. The variability of the CO concentration during coking can be used as a measure of the effectiveness of the coking process. An increase in the CO concentration during coking can indicate that materials such as tar soot and tar vapors are being produced, which can be recovered as end product from the coking process. In contrast, a decrease in the CO concentration can indicate a loss of combustible volatiles and an increase in coke formation.
Analysis of CO Concentration Curve
The CO concentration curve can be used to analyze the coking process and its efficiency. The CO concentration curve can be used to identify points in the coking process where the quality of the coking product is high or low. High points in the CO concentration curve indicate that the coking process is proceeding efficiently and that the coking product is of good quality. Low points in the CO concentration curve, on the other hand, indicate that the coking process is proceeding inefficiently and can lead to the production of lower quality coking products.
Conclusion
Coke oven gas (COG) is a by-product of the coking process and is composed mainly of CO and H2. The proper control over the coking process is important for the production of good quality coking products. The CO concentration curve can be used as a measure of the effectiveness of the coking process and can be used to identify points in the coking process where the quality of the coking product is high or low. The use of the CO concentration curve to monitor the coking process can thus lead to improved coking products and an increase in the efficiency of the coking process.
