철강슬래그를 이용한 가스상 원소수은의 산화특성 연구

The steel industry generally has been consuming a significant amount of raw materials and energy to manufacture steel. However, the discharge of various types of byproducts and waste were approximately 50%. In the case of iron manufacturing, many byproducts and wastes are generated from complicated production processes involving raw materials, rolled steel, and stainless steel. While the production of steel slag is increasing, the blast furnace and steel slag discharged from steel facilities are only partially recycled for use in low-value road aggregate and cement materials for reuse in the cement and iron facility processes. It is necessary to reduce the production of iron waste and thus reduce the cost of waste disposal through recycling while preventing environmental pollution. Furthermore, it is important to recycle steel slag produced in industrial activities and develop ways to extend recycling methods. In the previous study, the oxidation characteristics of elemental mercury were identified using steel slag. Previous research has found that mercury control efficiency is approximately 50% in domestic steel facilities and that mercury is oxidized by fly ash and steel oxide. In this study, experiments were performed at room temperature (100℃ and 200℃) for each air and syngas. The oxidation reaction of elemental mercury using was estimated using 1 mm, 2.36 mm, and 4.75 mm steel slag samples. Oxidation reactivity was approximately two times higher in the oxidation reaction at 100℃ and 200℃ than at room temperature. There was a slight variation in the oxidation reaction at 100℃ to 200℃. The level of oxidation reaction was not significant, regardless of the temperature and size of the samples. However, oxidation reactivity experienced the highest values under syngas conditions.