PJSC «Zaporizhstal», in accordance with the programme of technological modernizing of the main production equipment, has shutdown Blast Furnace No.4 (BF No.4) for 3d category heavy overhaul with some reconstruction and updating elements. Cost of the overhaul will make up about UAH 170 million.
The main aim of the overhaul of Blast Furnace No.4 – is implementation of more state-of-the-industry technologies, that will allow to provide the effective emergency-free operation of the equipment, and to reduce coke consumption for 25 kg per ton of iron.
The special concern in the course of overhaul will be focused on updating of the furnace cooling system. In particular, they will replace the pumps of the evaporative cooling system, install copper cooling plates made by Gongyi, lined with the increased resistance and heat conductivity refractories, and they will replace the cooling elements. Besides, during the repair, they will perform shotcreting of the furnace stack.
Let us remind that in 2014, a large-scale reconstruction was performed at Blast Furnace No.4. The total investments volume made up about UAH 950 million. In the course of the reconstruction, they erected a modern high-efficient dust-and-gas-cleaning plant, which reduces dust concentration at the outlet up to 20 mg/m3.
The output of Blast Furnace No.4 is 1112 thousand tons of iron per year. Since the date of its blow-in after reconstruction and up to its shutdown for heavy overhaul, the furnace produced over 2 million tons of iron.