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热力学计算表明,尽管aFes值非常小,即10_(-3)～10_(-4),但在连续吹练中,在高于1300℃的温度下,可以避免磁性氧化铁的生成。为了研究实际过程与平衡状态的不一致,在小型坩锅试验中测量了高品位冰铜中铁的氧化速率。冰铜的加入,是连续的或间断的。当铁的含量大于1.5～2%时,实际上所有供入的氧都消耗在铁和伴生硫的氧化上。但是,在铁浓度较低时,铁的氧化速率与铁的浓度成比例,在这些条件下,甚至当a_(Fes)高于平衡状态分析所提供的值时,供入的一部分氧气就可使Cu_2S氧化生成金属铜。这种可能性已经通过冰铜连续吹炼的模型试验所证明。
Thermodynamic calculations show that although the aFes value is very small, that is, 10 _ (- 3) ~ 10 _ (- 4), but in the continuous blowing, at temperatures above 1300 ℃, to avoid the formation of magnetic iron oxide. In order to investigate inconsistencies between the actual process and equilibrium conditions, the oxidation rate of iron in high grade matte was measured in a small crucible test. The addition of matte is continuous or intermittent. When the iron content is more than 1.5 to 2%, practically all of the supplied oxygen is consumed in the oxidation of iron and associated sulfur. However, at lower iron concentrations, the oxidation rate of iron is proportional to the iron concentration, and under these conditions, even when a Fes is above the value provided by the equilibrium analysis, a portion of the oxygen is supplied Cu 2 S oxidizes to form metallic copper. This possibility has been demonstrated by a model test of a continuous matte matte.