What is driving new desulfurization capacity at Chinese iron concentrate producers?

What is driving new desulfurization capacity at Chinese iron concentrate producers?
Several listed miners are expanding beneficiation and adding dedicated desulfurization circuits, lifting concentrate output while tightening sulfur specs. Projects in Shandong and elsewhere explicitly pair capacity expansion with desulfurization system construction, targeting higher-grade, lower-sulfur product for pellet and sinter feed. The logic is straightforward: cleaner concentrate supports higher pellet ratios, cuts limestone consumption and improves blast furnace productivity. Meanwhile, environmental enforcement has closed thousands of small, inefficient mining and processing enterprises since 2013, concentrating supply among larger operators with the capital to install desulfurization. That consolidation is quietly raising the average quality of domestic concentrate.