摘要
The viscosities of molten FenO-MgO-SiO2 and FenO-MgO-CaO-SiO2 semi-synthetic slags for nickel flash smelting were mearured in the temperature range of 1 2001 450 ℃ by use of a rotational viscometer. The mass ratio of Fe to SiO2 was fixed at 1.2, calcium oxide and magnesium oxide contents varied in the range of 2%8% and 9%12%（mass fraction）, respectively. The results show that silicate anions become smaller by increasing CaO content, which results in the viscosity decrease of slag. In the case of addition of MgO the viscosity behaviour is complicated. When MgO content is less than 11%, the viscosity increases with the increase of MgO at all temperatures tested . However, when the MgO content is more than 11%, the viscosity decreases slightly for FenO-MgO-CaO-SiO2 system. At higher MgO contents, low-viscosity slags can be obtained by adding CaO. As for a given composition, the viscosity decreased with increasing temperature .The higher the temperature, the more MgO can be added before saturation. The effect of Fe3O4 on the viscosity is quite significant. The viscosity of slag increases to 300 mPa·s at （1 300 ℃） when Fe3O4 content varied from 2.84% to 9.53%. The viscosity values are expressed as the functions of temperature and composition. A comparison between FenO-MgO-SiO2 and FenO-MgO-CaO-SiO2 systems are also given.
The viscosities of molten Fe_nO-MgO-SiO_2 and Fe_nO-MgO-CaO-SiO_2 semi-synthetic slags for nickel flash smelting were mearured in the temperature range of 1 2001 450 ℃ by use of a rotational viscometer. The mass ratio of Fe to SiO_2 was fixed at 1.2, calcium oxide and magnesium oxide contents varied in the range of 2%8% and 9%12%(mass fraction), respectively. The results show that silicate anions become smaller by increasing CaO content, which results in the viscosity decrease of slag. In the case of addition of MgO the viscosity behaviour is complicated. When MgO content is less than 11%, the viscosity increases with the increase of MgO at all temperatures tested . However, when the MgO content is more than 11%, the viscosity decreases slightly for Fe_nO-MgO-CaO-SiO_2 system. At higher MgO contents, low-viscosity slags can be obtained by adding CaO. As for a given composition, the viscosity decreased with increasing temperature .The higher the temperature, the more MgO can be added before saturation. The effect of Fe_3O_4 on the viscosity is quite significant. The viscosity of slag increases to 300 mPa·s at (1 300 ℃) when Fe_3O_4 content varied from 2.84% to 9.53%. The viscosity values are expressed as the functions of temperature and composition. A comparison between Fe_nO-MgO-SiO_2 and Fe_nO-MgO-CaO-SiO_2 systems are also given.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2003年第6期1451-1453,共3页
Transactions of Nonferrous Metals Society of China
