【摘要】 用 CaCl₂氯化分离 SiO₂—FeO—Nb₂O₅三元渣,使 FeO 呈 FeCl₂气体逸出渣系,其氯化速率为 VFeO=kNⁿFeO,其中 k 值随温度升高而升高,反应级数 n 在1.6—2.4之间,对应的活化能为5.32千卡/摩尔,表明反应以扩散为控制环节。氯化生产实际渣的结果表明,FeO 与 MnO 的氯化趋势相近,同时也说明,用 CaCl₂为氯化剂分离铌渣,并分别回收铌、锰是可行。更多还原

【Abstract】 The ternary SiO₂-FeO-Nb₂O₅ slag was chlorinated with CeCl₂,FeO being volatilized as FeCl₂.Its rate of chlorination could be written as V_FeO =kNⁿ_FeO,where the specific rate constant k was found to increase with the increase of temperuture,while the order of reaction n was found experi- mentally to equal to 1.6-2.4.The corresponding activation energy experime- ntally was 5.33 Kcal/mol,which indicated that the chlorination reaction was diffusion-controlled.Chlorination of the Nb-slag from industry shows that FeO behaves quite similarly to MnO.Thus the chlorination of Nb-slag with CaCl₂ to separate Mn from Nb and to recover them separately can be considered experimentally.更多还原