During cold repair of the double-hearth furnace №1 in the open-hearth furnace shop and capital repair of gas cleaning the whole complex of works was carried out, which will allow to increase the productivity of the steel-making unit and improve ecological indicators. To fulfill this task the main equipment in the gas cleaning machine hall was replaced. On one side of the gas cleaning the gas pipe line was completely replaced, and partially on the another side after inspection was carried out. Scheduled additional preventive actions were accomplished. Substantial contribution to timely performance of the jobs was made by the staff of the mechanical shop and the metallic structure shop. Despite of the large volume of work they have operatively fulfilled all the orders for manufacturing of spare parts and metallic structures.