In the paper the essence of the coke dry quenching process as well as the development of this technology were presented. Design projects aiming at increasing the coke throughput and the heat efficiency of the CDQ-facilities were specified. The ways of utilising the recorvered heat energy, i.e. the production of process steam, electricity and gas reducers as well as preheating of the coal blend for coke production were discussed. Presented were also the causes of the wear of the component parts of a waste heat boiler and a cooling chamber. Moreover, the efforts aiming at eliminating the causes of failure standstills of the CDQ-facilities were described. Furthermore, discussed were the ways of reducing dust and gas emission from the CDQ-facilities.