FeO-MgO-SiO_2系粘度的研究

VISCOSITY OF FeO MgO SiO 2 SYSTEM: A STUDY

测定了半合成的不同成分的ＦｅＯＭｇＯＳｉＯ２系炉渣粘度。在ｗ（ＭｇＯ）为６％～１０％，ｗ（Ｆｅ）／ｗ（ＳｉＯ２）为１１～１４，温度为１２００～１５００℃时，炉渣粘度随ｗ（ＭｇＯ）和ｗ（Ｆｅ）／ｗ（ＳｉＯ２）的提高而增大；在ｗ（ＭｇＯ）＜６％时，冶炼温度控制在１３００℃即能保证顺利生产；当ｗ（ＭｇＯ）＞１０％时，镍冶炼炉渣的温度应控制在１３６０℃以上；在ＭｇＯ含量较高时，可通过降低ｗ（Ｆｅ）／ｗ（ＳｉＯ２）得到粘度较低的炉渣。金川闪速炉炉渣的合理ｗ（Ｆｅ）／ｗ（ＳｉＯ２）为１２左右。

From the determination of viscosity of the FeO MgO SiO 2 slags system with different compositions, it is concluded that at MgO contents of 6%～10%, Fe to SiO 2 ratioes of 1 1～1 4 and temperatures of 1200～1500 ℃, the viscosity of slags increases with increasing MgO content and Fe to SiO 2 ratio. At MgO content of below 6%, the smelting temparature is kept at 1300 ℃ so that production may be ensured; at MgO content of above 10%, the smelting temperatare of nickel slags should be kept at above 1360 ℃; and at higher MgO contents, low viscosity slags can be obtained by controlling the Fe to SiO 2 ratio. Moreover, it is considered that the reasonable Fe to SiO 2 ratio should be 1 2, and addition of CaO can lead to the reduction in slag viscosity.