The present invention relates to a process for the preparation of coke using non-coking and semi-coking coals only, without using any prime coking coal which comprises isolation of the active coking components present in semi-coking or coking coals responsible for coking characteristics, blending the active coking component with washed non-coking coal in ratio starting from 10:90 to 99:01 followed by production of coke using a coke oven using stamp charging method. Using this method, low cost and abundant semi-coking and non-coking thermal coals can be used for coke making without addition of any coking coal leading to significant economical benefit to steel and other coke consuming industries. No external additives are added to the coal blend, making the coke making process simple and economical. Also, a new approach of isolating the active coking components from the coking and semicoking coal and blending with non coking coal is described.