【Process Principle】

 Adopting lime-gypsum desulfurization process with lime slurry as absorbent to capture sulfur dioxide from smelting flue gas. Air is blown into the slurry circulation tank for forced oxidation, finally producing gypsum as by-product. The process is safe and reliable without scaling or blockage issues.

【Main Reactions】

● SO₂ absorption: SO₂ + H₂O ←→ H⁺ + HSO₃⁻

● Lime dissolution: CaO + H₂O ←→ Ca²⁺ + 2OH⁻

● Forced oxidation: SO₃²⁻ + 1/2O₂ ←→ SO₄²⁻

● Gypsum formation: Ca²⁺ + SO₄²⁻ + 2H₂O ←→ CaSO₄·2H₂O

【Process Advantages】

● Technical reliability: Mature and reliable technology with extensive operational experience at home and abroad, delivering high desulfurization efficiency.

● High equipment availability: Excellent equipment operation rate with limestone utilization rate exceeding 97%, long service life, and favorable return on investment.

● Resource and cost advantages: Abundant desulfurizer resources at low cost; by-product gypsum can be recycled to ensure economic benefits.