中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2011年
7期
1648-1654
,共7页
FeO%NiO%熔渣%电导率%交流阻抗
FeO%NiO%鎔渣%電導率%交流阻抗
FeO%NiO%용사%전도솔%교류조항
FeO%NiO%molten slag%electrical conductivity%AC impedance spectroscopy
作为有色冶金渣中有价金属回收基础,利用电化学交流阻抗谱法,测定低碱度MO(MO=FeO,NiO)- CaO-MgO-Al2O3-SiO2五元熔渣体系的电导率.结果表明:随着熔渣体系温度的升高和MO浓度的增大,熔渣电导率增大.在1 573～1 773 K下,(CaO+MgO)与(SiO2+Al2O3)质量比为0.47,当MO浓度小于12％时,熔渣电导率为1.4～14.4S/m.随着熔渣中MO浓度的增大,熔渣电导率增大的幅度增加.当熔渣中FeO和NiO浓度小于8％时,两种熔渣的电导率相差不大；当浓度达到12％时,含FeO的熔渣电导率明显大于含NiO的熔渣电导率.随着MO浓度的增加,电导活化能降低.
作為有色冶金渣中有價金屬迴收基礎,利用電化學交流阻抗譜法,測定低堿度MO(MO=FeO,NiO)- CaO-MgO-Al2O3-SiO2五元鎔渣體繫的電導率.結果錶明:隨著鎔渣體繫溫度的升高和MO濃度的增大,鎔渣電導率增大.在1 573～1 773 K下,(CaO+MgO)與(SiO2+Al2O3)質量比為0.47,噹MO濃度小于12％時,鎔渣電導率為1.4～14.4S/m.隨著鎔渣中MO濃度的增大,鎔渣電導率增大的幅度增加.噹鎔渣中FeO和NiO濃度小于8％時,兩種鎔渣的電導率相差不大；噹濃度達到12％時,含FeO的鎔渣電導率明顯大于含NiO的鎔渣電導率.隨著MO濃度的增加,電導活化能降低.
작위유색야금사중유개금속회수기출,이용전화학교류조항보법,측정저감도MO(MO=FeO,NiO)- CaO-MgO-Al2O3-SiO2오원용사체계적전도솔.결과표명:수착용사체계온도적승고화MO농도적증대,용사전도솔증대.재1 573～1 773 K하,(CaO+MgO)여(SiO2+Al2O3)질량비위0.47,당MO농도소우12％시,용사전도솔위1.4～14.4S/m.수착용사중MO농도적증대,용사전도솔증대적폭도증가.당용사중FeO화NiO농도소우8％시,량충용사적전도솔상차불대；당농도체도12％시,함FeO적용사전도솔명현대우함NiO적용사전도솔.수착MO농도적증가,전도활화능강저.
As a fundamental study on recovery of valuable metals from nonferrous metallurgical slags,electrical conductivity values of MO(MO=FeO,NiO)-containing CaO-MgO-SiO2-Al2O3 slag with a low basicity were measured at different temperatures using AC impedance spectroscopy.The result shows that the electrical conductivity increased from 1.4 S/m to 14.4 S/m with the increase of the temperature from 1 573 to 1 773 K and the content of MO which is less than 12％ under the constant mass ratio of (CaO+MgO) to (SiO2+Al2O3) of 0.47.Moreover,the increase magnitude of the electrical conductivity was also promoted with the increase of the content of MO.The electrical conductivity of FeO-containing slags was close to that of NiO-eontaining slags when the content was less than 8％; however,it was obviously larger than that of NiO-containing slags when the content was 12％.The activation energy of the electrical conductivity decreased with the increase of MO content.
