- Sustainable development
- Energy efficiency
- Energy efficiency cases
- Technical upgrade of the hot blast duct at NLMK Lipetsk
Technical upgrade of the hot blast duct at NLMK Lipetsk
The objective was to debottleneck insufficiencies in heat capacity of the block made up of three stoves at BF-3 that prevented attaining maximum hot blasting temperature and led to increased coke consumption. In addition, refractory lining wear led to increased carbon oxide emissions.
After the upgrade, Stoves No. 8 and 8A from BF No. 2 were transferred from BF-2 to BF-3, and Stove No. 9 was converted into a backup one, enabling the operation of BF-3 with four stoves. The works were carried out while production was ongoing, without any output losses.
This project enabled a reduction in coke consumption by 8 kg/t.
Investment totalled RUB 32.5 million. The project payback period was 3.5 months.