论文部分内容阅读
以高温熔渣为电解质、MgO–C砖为阴极和阳极,1823K条件下研究了外加电势对阴极耐火材料表面电沉积效果的影响。结果表明:合理电压范围内,熔渣会发生电解,阴极表面单质Si和Fe析出是诱发熔渣组分偏移的驱动力,也是导致电沉积的内在因素,高熔点沉积层的形成可为耐火材料抗熔渣侵蚀提供良好的物理和化学保护;在CaO–SiO_2–Al_2O_3渣系中,单质硅的析出电位约为–6.1V,CaO–SiO_2–Fe_2O_3渣系中,单质铁的析出电位约为–1.25V,硅的析出电位为–5.85V,可以为优选合理电势提供基础;阴极耐火材料形成沉积物的类型与熔渣组成密切相关。
High temperature slag as electrolyte and MgO-C brick as cathode and anode were used to study the effect of applied potential on the electrodepositing effect of cathode refractory at 1823K. The results show that within a reasonable voltage range, the molten slag will be electrolyzed. The elemental Si and Fe precipitates on the cathode surface are the driving forces that induce the slag component migration and are also the intrinsic factors leading to electrodeposition. The formation of high melting point deposits may be resistant to fire In the CaO-SiO_2-Al_2O_3 slag system, the precipitation potential of elemental silicon is about -6.1V. In CaO-SiO_2-Fe_2O_3 slag system, the precipitation potential of elemental iron is about -1.25V, and the precipitation potential of silicon is -5.85V, which can provide the basis for the optimal potential. The type of deposit formed by cathode refractories is closely related to the slag composition.