Valin Lianyuan Steel invests $112.3 million upgrading blast furnace No. 7 over 10 months. The project replaces refractory lining, modernizes sintering systems, & installs digital control models. It eliminates safety hazards while cutting coke consumption 8-12 kg per metric ton. Emissions fall through advanced filtration. The upgrade secures another 12-18 years of reliable iron production for Hunan’s integrated steel hub.