CAJ | 학술논문

通过异极矿真空碳热还原试验,研究添加CaF2和对碳热还原硅酸锌的的影响.结果表明:CaF2能催化硅酸锌的碳热还原,降低还原温度,缩短反应时间；温度越低,催化效果越好；CaF2的添加量越多,催化效果越明显.CaF2催化真空碳热还原异极矿的较佳工艺条件是:CaF2的添加量约10％,还原蒸馏温度1373 K,C/Zn 总的物质的量比2.5,系统压强低于20 kPa,反应时间约40min.在较佳工艺条件下,异极矿中约93％的锌被还原蒸馏出来.
통과이겁광진공탄열환원시험,연구첨가CaF2화대탄열환원규산자적적영향.결과표명:CaF2능최화규산자적탄열환원,강저환원온도,축단반응시간；온도월저,최화효과월호；CaF2적첨가량월다,최화효과월명현.CaF2최화진공탄열환원이겁광적교가공예조건시:CaF2적첨가량약10％,환원증류온도1373 K,C/Zn 총적물질적량비2.5,계통압강저우20 kPa,반응시간약40min.재교가공예조건하,이겁광중약93％적자피환원증류출래.
Zn reduction was investigated by the vacuum carbothermic reduction of hemimorphite with or without CaF2 as catalyst.Results indicate that CaF2 can catalyze the carbothermie reduction of zinc silicate,decrease the reaction temperature and time.The lower the reaction temperature and the more the amount of CaF2,the better the catalytic effect.The optimal process condition is obtained as follows:the addition of about 10％ CaF2,the reaction temperature of 1373 K,the molar ratio of C to ZnTotal of 2.5,the pressure of system lower than 20 kPa,the reaction time of about 40 min.Under the optimal process condition,the zinc reduction rate is about 93％ from hemimorphite.