CAJ | 학술논문

为降低火法冶金炉渣中磁性铁含量以回收铜，采用柴油在 N2存在条件下还原铜渣中 Fe3O4；并基于吉布斯自由能最小化原理，建立平衡模型，探讨了反应温度（1220～1280℃）、N2加入量（480～960m3/d）、油渣比（0.5～2.9L/t）对Fe3O4还原反应的影响。结果表明：柴油裂解，主要生成C和H2；同时，反应中气体体积发生膨胀。提高反应温度和N2加入量，裂解产物摩尔分数基本保持不变。Fe3O4与柴油裂解产物的反应平衡常数大，反应程度高，Fe3O4被还原成 FeO。油渣比增加，Fe3O4还原率呈线性增加。柴油裂解和柴油在氮气存在条件下还原铜渣中Fe3O4反应都是吸热过程。
위강저화법야금로사중자성철함량이회수동，채용시유재 N2존재조건하환원동사중 Fe3O4；병기우길포사자유능최소화원리，건립평형모형，탐토료반응온도（1220～1280℃）、N2가입량（480～960m3/d）、유사비（0.5～2.9L/t）대Fe3O4환원반응적영향。결과표명：시유렬해，주요생성C화H2；동시，반응중기체체적발생팽창。제고반응온도화N2가입량，렬해산물마이분수기본보지불변。Fe3O4여시유렬해산물적반응평형상수대，반응정도고，Fe3O4피환원성 FeO。유사비증가，Fe3O4환원솔정선성증가。시유렬해화시유재담기존재조건하환원동사중Fe3O4반응도시흡열과정。
For copper recovery from the slag of pyro-metallurgy by reducing the Fe3O4 , the equilibrium model of reduction of Fe3O4 reduction by diesel oil in the presence of N2 was established based on the Gibbs free energy minimization principle. The effects of reaction temperatures (1220~1280℃),amount of N2 (480~960m3/d),ratio of diesel to slag (0.5~2.9 L/t) on Fe3O4 reduction were investigated. Diesel oil was completely cracked under N2 atmosphere,with the main pyrolysis products of C and H2. Meanwhile,the volume of gas during reaction increased. The products of pyrolysis almost remained unchanged with rising reaction temperature and N2 addition. The equilibrium constants of reduction reactions of Fe3O4 by the pyrolysis products of diesel oil were large,and a high degree of reduction reactions was achieved. Fe3O4 in copper slag was reduced to FeO. The reduction degree of Fe3O4 was improved with rising ratio of diesel oil to slag. Pyrolysis of diesel oil and reduction of Fe3O4 by diesel oil in the presence of nitrogen were endothermic.