沉降电炉渣体系的熔化温度研究

Investigation on the Melting Temperature of Electric Furnace Slags

本文采用Factsage软件的Phase Diagram模块对艾萨炼铜工艺电炉渣体系的初始熔化温度和完全熔化温度进行计算,同时分析了炉渣各组分对于熔化温度的影响规律。研究结果表明：电炉渣的完全熔化温度随着Al_2O_3、Fe_3O_4含量的升高迅速上升,CaO、SiO_2的含量对于熔化温度的影响不大;FeO含量的升高会使熔化温度大幅降低,通过采取一定的措施促进电炉渣中Fe_3O_4转变成FeO,可以显著降低熔化温度。实际生产中需要控制Al_2O_3的含量低于4.5%、Fe_3O_4的含量低于8%、MgO的含量低于4%,从而可确保电炉渣在操作温度下完全熔化。

The initial melting temperature and complete melting temperature were calculated using the phase-diagram module of Factsage for the ISA smelting electric slag system. Additionally, we analyzed the effect of slag components on the melting temperature. The results show that the complete melting temperature of the electric furnace slag increases sharply as the content of Al2O3 or Fe3O4 increases, while the content of CaO and SiO2 has little influence on the melting temperature; The increase of FeO content leads to the significant decrease of melting temperature. Promoting the transformation from Fe3O4 into FeO will significantly reduce the melting temperature by adopting certain methods. In the actual production, it should to be controlled that Al2O3〈4.5%, Fe3O4〈8% and MgO〈4%, thus ensuring that the electric furnace slag is completely melting under the operating temperature.