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研究了三菱连续铜熔炼和吹炼工艺中所产生炉渣的微观组织与相图,以防止磁性氧化铁引发的一系列问题,诸如炉膛与流槽上的炉结积聚,熔体出口堵塞,渣粘度上升等等。根据这些研究结果,通过调整熔炼炉的硅酸盐渣中的二氧化硅和氧化钙含量以及吹炼炉的铁钙渣中的氧化钙含量,以达到降低、稳定弃渣含铜量,减少熔体出口及流槽的清理之目的。然而,这些改动有可能降低希望的炉结保护层厚度,从而缩短炉寿命。因此,开发了一种估测熔体内磁性氧化铁含量的方法,并将炉渣成分与温度控制在适当范围内,从而延长炉寿命,避免磁性氧化铁引发的问题。
The microstructure and phase diagram of the slag produced in Mitsubishi continuous copper smelting and blowing process were studied in order to prevent a series of problems caused by magnetic iron oxide, such as the accumulation of hearth and hearth, the blockage of melt outlet, the slag viscosity Rise and so on. According to these results, the content of silica and calcium oxide in the silicate slag in the smelting furnace and the calcium oxide content in the calcium iron slag in the smelting furnace are adjusted so as to reduce, stabilize the copper content in the slag and reduce the melting Body exports and runoff cleaning purposes. However, these changes have the potential to reduce the thickness of the desired grate cover and thereby shorten the furnace life. Therefore, a method of estimating the content of magnetic iron oxide in the melt has been developed, and the composition and temperature of the slag are controlled within an appropriate range, thereby extending the life of the furnace and avoiding the problems caused by the magnetic iron oxide.