Abstract The operational efficiency of a coke plant depends on three vital aspects: first, the produced coke should meet the quality standards required for the use of modern blast furnaces; second, the environmental consideration; and third, the cost of the coke. This has become progressively important due to the cost competitiveness of the iron and steel industry, which has become the key to survival. Therefore, the production of coke with optimal cost by adequate selection of cokemaking technology and the optimization of coal blend cost and operating parameters are the most important tasks for cokemakers. This chapter describes an overview of cokemaking technologies, fundamental aspects of carbonization, coal-blending practice in cokemaking with practical experience, and the influence of operating parameters and environmental regulations. A brief review of conventional by-product coke ovens is also part of this chapter.