Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

In this study, Na₂SO₄ and KCl reagents were used to synthesize K₂SO₄ as a basic study for recycling byproducts generated during the manufacture of steel and cement. The mole ratio of Na₂SO₄ to KCl, the saturation of the solution, and the stirring temperature were controlled to derive the optimal manufacturing conditions. The microstructure and crystallinity of the materials prepared were evaluated using scanning electron microscopy and X-ray diffraction analysis. Pure K₂SO₄ was obtained when the mole ratio of Na₂SO₄ to KCl was 1:6–18, the saturation of the solution was less than 160%, and the stirring temperature was 20℃, 50℃. The optimal manufacturing conditions to maximize the crystallinity and yield of K₂SO₄ while minimizing the energy consumption were 1:6 mole ratio of Na₂SO₄ to KCl, 140% saturation of the solution, and 20℃ stirring temperature.