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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)-CaOMgO-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1573～1773K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。
As the basis for the recovery of valuable metals in non-ferrous metallurgical slag, the conductivity of the ternary slag system with low basicity MO (MO = FeO, NiO) -CaOMgO-Al2O3-SiO2 was measured by electrochemical impedance spectroscopy. The results show that with the increase of the temperature of the slag system and the increase of the MO concentration, the conductivity of the slag increases. The mass ratio of (CaO + MgO) to (SiO2 + Al2O3) is 0.47 at 1573-1773 K, and the slag conductivity is 1.4-14.4 S / m when the MO concentration is less than 12%. As the MO concentration in the slag increases, the magnitude of slag conductivity increases. When the concentration of FeO and NiO in the slag is less than 8%, the conductivity of the two kinds of slag is almost the same. When the concentration reaches 12%, the conductivity of the slag containing FeO is obviously higher than that of the slag containing NiO. As the MO concentration increases, the conductance activation energy decreases.