人造金刚石酸洗触媒废液中镍、钴、锰回收研究

【作者】 何显达；

【导师】 郭学益；

【作者基本信息】 中南大学 ， 冶金工程， 2005， 硕士

【摘要】 针对人造金刚石酸洗触媒废液的特点,本文提出了一种适应性较强的综合回收工艺。该工艺对废料通过预除杂—P204萃取除杂—P507分离镍钴—镍钴产品生产加以回收再利用。运用该工艺,对一种比较典型的高锰镍钴二次资源—人造金刚石酸洗触媒废液的综合回收利用进行了研究。 本文对Ni（Ⅱ）-Co（Ⅱ）-Mn（Ⅱ）-NH₃-CO₃^2--H₂O多金属离子—多配合体—多沉淀剂水溶液中金属离子的分离效果提出了一种评价方法。以此为基础建立了数学模型,通过matlab可视化模拟结果,提出了一种先进行硫酸镍铵复盐初步沉镍、然后用硫酸铵—碳铵—氨水混合溶液有效分离废液中锰的新方法。通过实验证实了理论分析结果,并确定了分离锰的优化工艺参数。 对分离了锰以后的溶液进一步处理进行了研究。通过理论分析和实验研究,确定了通过加碱蒸氨、P204三级逆流萃取除杂、P507三级逆流萃取分离镍钴等工艺过程可以得到合格的氯化钴和硫酸镍。通过系统实验,确定了用草酸铵沉淀法生产性能稳定的草酸盐的工艺条件和控制方法,同时得出了高温还原法生产质量合格镍钴粉体产品的工艺条件和控制方法。更多还原

【Abstract】 A process is adopted to recover the metal values in the typical nickel and cobalt containing waste with high manganese content, named a kind of acid waste solution originated from the artificial diamond industry. The valuable metals in the waste are reclaimed through the course of primary purification-purification through solvent extraction by P204-separation of nickel and cobalt through solvent extraction by P507-manufacturing of nickel and cobalt products.An approach is developed to evaluate the separation efficiency of manganese in the aqueous system of Ni（ⅡⅢ）-Co（Ⅱ）-Mn（Ⅱ）-NH₃-CO₃^2--H₂O. Based on the new approach, a mathematical model is established, followed by the visual simulation with the matlab software. Tdfectively by the addition of the mixture of （NH₄）₂SO₄, NH₄HCO₃ and ammonia. Experiments are carried out to confirm the analysis results from the mathematical modeling and to optimize the process parameters.The treatment of the waste solution after separation of manganese is studied. The theoretical analysis and experimental research determine the process of evaporating the ammonia with the addition of NaOH, removing manganese through three-stage counter current solvent extraction by P204, separating nickel and cobalt through three-stage counter current solvent extraction by P507 to prepare high-quality NiSO₄ and CoCl₂. The analysis result of the systematic experiments concludes the appropriate parameters to produce performance-stable oxalate salts and high-quality metallic powders.更多还原