【摘要】 粗铜(Cu-Ni-Sn-Fe)作为电子废弃物火法熔炼的主要产物之一,富含多种贵金属,高效分离其中的Ni、Sn等有价元素成为关键。基于碱性渣系开展了氧化吹炼脱锡研究,根据热力学分析结果,试验研究了氧分压、造渣剂过量系数等条件对元素脱除率及分离效果的影响,并对反应机理进行了解。研究结果表明,采用碱性造渣剂有利于降低渣中SnO2的活度,促进锡的氧化脱除同时抑制铜镍的氧化溶解损失。氧分压达到10-5 Pa时,3～4倍造渣剂的量条件下金属的脱除率和分离效果达到最佳。锡脱除率达到90%,Sn-Cu分离系数8.5左右。更多还原

【Abstract】 Cu-Ni-Sn-Fe is one of the main products of fire melting of electronic waste.It is rich in various precious metals,and it is the key to efficiently separate the valuable elements such as Ni and Sn.Based on the alkaline slag system,the research on oxidation converting and de-tinning was carried out.According to the results of thermodynamic analysis,the effects of oxygen partial consumption and slag-forming agent excess coefficient on the element removal rate and separation effect were studied,and the reaction mechanism was understood.The results show that the use of alkaline slag-forming agent is beneficial to reduce the activity of SnO2 in slag,promote the oxidation removal of tin and inhibit the oxidative dissolution loss of copper and nickel.When the oxygen partial pressure reaches 10-5 Pa,the removal rate and separation effect of the metal are optimal under the condition of 3 to 4 times the amount of slag-forming agent.The tin removal rate is90%,and the Sn-Cu separation coefficient is about 8.5.更多还原