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含钛高炉渣中钛组分弥散分布于多种矿物相中 ,很难直接用选矿方法分离。在高炉渣中加入 Ca O和 Mn O可使钛富集于充分结晶长大的钙钛矿相中 ,为选矿分离创造必要条件。作者借助多视场图像分析及粘度测定研究了 Ca O、Mn O对钙钛矿相结晶的影响。实验结果表明 :Ca O加入量对钙钛矿结晶及晶体生长有双重影响。加入适量 Ca O,有利于钙钛矿相结晶量的增加 ,但 Ca O加入量过多 ,使熔渣粘度及熔化性温度显著提高 ,反而抑制钙钛矿结晶长大。加入适量 Mn O可显著降低熔渣粘度及熔化性温度 ,促进钙钛矿结晶长大。随 Ca O加入量提高 ,钙钛矿由粗大的树枝晶转变为细小等轴晶 ,说明加入过多 Ca O不利于钙钛矿晶体粗化。
Ti-bearing titanium slag components dispersed in a variety of mineral phase, it is difficult to separate directly with the beneficiation method. The addition of CaO and MnO to the blast furnace slag enriches titanium in the fully crystallized and perovskite phase, creating the necessary conditions for beneficiation and separation. The authors studied the influence of CaO and MnO on the crystallization of perovskite by multi-field image analysis and viscosity measurement. The experimental results show that the addition of CaO has a dual effect on the crystallization and crystal growth of perovskite. Addition of appropriate amount of CaO is conducive to the increase of the amount of perovskite crystallization, but CaO added too much, the slag viscosity and melting temperature significantly increased, but inhibit perovskite crystal growth. Addition of appropriate amount of Mn O can significantly reduce the slag viscosity and melting temperature, promote perovskite crystal growth. With the increase of CaO content, perovskite transformed from coarse dendrites into fine equiaxed crystals, indicating that the addition of too much CaO is not conducive to the perovskite crystal coarsening.