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Case Study | Shandong Iron and Steel Group

【Introduction】Our company has tailored a high‑specific‑surface‑area calcium hydroxide desulfurization solution to address the flue gas conditions of Shandong Iron and Steel Group’s hot blast stoves and reheating furnaces, achieving ultra‑low emissions, reducing energy consumption and costs, and enabling the synergistic control of multiple pollutants. At the same time, we have optimized equipment operation and maintenance, thereby realizing the resource‑based utilization of solid waste.
【Keywords】 Steel flue gas treatment, high‑specific‑surface‑area calcium hydroxide, ultra‑low desulfurization emissions, synergistic control of multiple pollutants, desulfurization to reduce energy consumption an

Service Industry: Steel Industry

Management Solution: For the complex flue gas conditions in steel plant hot blast stoves and reheating furnaces, our company employs a high-specific-surface-area calcium hydroxide desulfurization agent and customizes an integrated flue gas desulfurization and multi-pollutant synergistic treatment solution, tailored to meet the flue gas purification needs across the entire steel production process.

1. Efficient Desulfurization Adapting to Complex Production Conditions: The project achieves ultra-low, stable emissions of sulfur dioxide (SO₂), with emission concentrations strictly controlled below 35 mg/m³. It can simultaneously and efficiently remove various acidic harmful gases such as SO₃, HCl, and HF from the flue gas, demonstrating exceptional resilience to fluctuations in flue gas sulfur concentrations. This makes it perfectly suited to the variable and complex flue gas conditions typical of the steel industry, ensuring stable operation of the desulfurization system without any fluctuations.

2. Reduced Consumption and Costs, Enhancing Corporate Economic Benefits: The core calcium-to-sulfur ratio is maintained within the optimal range of 1.2–1.5. Compared with traditional desulfurization processes, the overall consumption of desulfurizing agents is reduced by 20%–40%, significantly cutting down on raw material procurement, storage, and usage costs. The energy-saving and consumption-reducing advantages are prominent, effectively improving the project’s overall cost-effectiveness and enhancing the enterprise’s green production returns.

3. Comprehensive Purification Achieving Synergistic Multi-Pollutant Control: Leveraging highly efficient purification technologies, the system precisely adsorbs fine particulate matter PM2.5 as well as heavy metal pollutants such as mercury, lead, and cadmium from the flue gas, while also effectively inhibiting the formation and dispersion of dioxins, achieving all-round purification of flue gas pollution sources. Ultimately, particulate matter emissions are stably controlled below 10 mg/m³, fully meeting ultra-low emission standards.

4. Optimized Operation and Maintenance, Reducing Equipment Wear-and-Tear Costs: Through operational condition optimization and process upgrades, the equipment operating environment is improved at its source, extending the service life of filter bags by more than 30%. This effectively addresses common equipment malfunctions in traditional processes—such as filter bag clogging, pipeline blockages, and flue corrosion—significantly reducing the frequency of equipment downtime for maintenance and the overall workload of operations and maintenance, thereby markedly lowering corporate equipment operation and maintenance costs as well as losses due to production stoppages.

5. Solid Waste Resource Recovery, Supporting Green and Low-Carbon Development: The high-specific-surface-area desulfurizing agent reacts thoroughly and boasts high utilization rates, producing desulfurization ash of uniform and stable quality that can be directly sold externally, thus realizing the resource recovery and reuse of solid waste. At the same time, the project’s total solid waste output has been significantly reduced, effectively cutting expenses related to solid waste transportation, landfilling, and disposal, helping enterprises achieve both cost reduction and efficiency gains as well as the dual goals of green and low-carbon production.