Leading Russian steel maker Severstal has put into operation the first block of coke oven battery No KB11 with a coal charge compaction technology at the Cherepovets Metallurgical Plant. The capacity of the first block is 700 thousand tonnes of products per year. The new unit will increase the production of coke for the increasing volumes hot metal & steel. The project is worth over 34 billion rubles. All coke machines of the unit are automated. The software module signals when it is possible to give a command to the coke pusher to remove the door. Thus, the human factor is excluded and the work of the personnel is optimized. The minimum service life of KB-11 will be 40 years.
Severstal uses the innovative developments of Paul Wurth in the construction of a coke oven battery. Modern solutions allow maintaining the quality of coke even when using raw materials of lower quality and cost. One of the key units of coke oven battery No 11 is the ramming loading and ejection machine TZVM. This equipment, in combination with the correct preparation of the charge with the required characteristics, provides the compaction technology.
The quality of the coke will be ensured, among other things, through a special dry coke quenching unit. The technology guarantees high quality of fuel for blast furnaces, since it involves additional calcination and stabilization of the entire volume of coke. USTK ensures the absence of moisture, undesirable in the process of blast furnace smelting, increases cold strength. In addition, the equipment allows reuse of energy resources by utilizing the heat of incandescent coke to generate steam and electricity.
An important advantage of the KB-11 complex is its ecological component. The system of dust free coke discharge from the chamber will allow to clean up dust emissions from the bag filter up to 10 miliion grams per cubic meter, the level of the cleanest metallurgical enterprises in the world. The battery complex is equipped with smokeless charging systems for coke ovens. The design of the furnaces will allow the coke oven battery to operate practically without fugitive gas emissions. The specific emission from the complex of coke oven battery No 11 will be 20% lower compared to the total specific emission of coke oven battery No 7-10.
The project of coke oven battery No 11 involves the construction of two blocks with 56 ovens in each. The laying of the second battery block has begun on the site. The total capacity of the new unit is 1.4 million tonnes per year. The launch of the second block is scheduled for 2021.