论文部分内容阅读
固态碳质燃料(如煤和焦炭)已经常用作闪速炼铜的代用能源,其结果大大节省了能源成本。此外,由于反应塔和沉淀池中化学势不同而使闪速炉工况得以改善。它包括:弃渣含Fe_3O_4及Cu降低;沉淀池炉底上升减至最小;上升烟道炉结易于清除。但是在低氧分压下熔炼使得某些微量元素富集于冰铜相中。热力学计算表明,某些Va族微量元素会富集于冰铜,难以造渣及挥发除去。所以,了解固态碳质燃料对闪速炼铜化学过程的影响对于优化实际操作显得十分重要。
Solid-state carbonaceous fuels, such as coal and coke, have been frequently used as substitutes for flash copper smelting, resulting in significant savings in energy costs. In addition, flash furnace operating conditions are improved due to the different chemical potentials in the reaction and settling tanks. It includes: slag containing Fe_3O_4 and Cu reduction; sedimentation tank bottom rise to a minimum; rising flue furnace knot easy to remove. However, smelting at a low oxygen partial pressure enriched some of the trace elements in the matte phase. Thermodynamic calculations show that some of the Va trace elements will be enriched in matte copper, difficult to slag and volatile removal. Therefore, understanding the impact of solid carbonaceous fuel on the chemical process of flash copper refining is very important for optimizing the actual operation.