Cu_2S-FeS-SiO_2-CaO系熔体氧化动力学及机理  

OXIDATION KINETICS AND MECHANISM OF MELTS IN Cu_2S-FeS-SiO_2-CaO SYSTEM

作　　者：郭先健[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《有色金属》1993年第2期63-67,共5页Nonferrous Metals

摘　　要：在气体喷吹熔体表面的情况下,测定了Cu_2S-FeS-SiO_2-CaO系熔体氧化动力学。结果表明,熔体中FeS优先于Cu_2S氧化;硫的氧化反应对po_2为一级反应,对aFeS为零级反应,反应表观活化能为55.7kCal/mol;反应前期硫的氧化速率明显高于Fe^(2+)的氧化速率。随着反应的进行,Fe^(2+)的氧化速率显着增加。渣中CaO在一定范围内增加,脱硫速率及渣含Fe_3O_4提高;氧通过渣相的传递为总速率的控制步骤,氧的传递按两类机构来完成;气相氧浓度提高及渣中CaO增加的作用在于提高渣相中氧的传递速率。The oxidation kinetics of melts of Cu_2S-FeS-SiO_2-CaO system was mea sured in the case of blasting melt surface with oxygen-nitrogen gas mix ture, and mechanism of the reaction was discussed. FeS is oxidized in prefe rence to Cu_2S in the oxidation process of melts. The oxidation of sulphur is first order with respect to po_2, and zero order with respect to a_F.3. The apparent activation energy of the reaction is 55.7 kcal/mol.The oxida tion rate of sulphur is higher than that of Fe^(2+) in the initial sta...

关 键 词：oxidation kinetics MELT elimination of sulphur 

分 类 号：TD862[矿业工程—金属矿开采] TF80[矿业工程—矿山开采]