Abstract TSL flue dust is a waste residue, rich in Zn, generating from the pyrometallurgical process of Cu recycling and constitutes a potential raw material for ZnO production. In order to valorize this waste by introducing a novel process, its selective impurity removal by integrating different commercially viable hydrometallurgical technologies was investigated on both laboratory and pilot scale. Special attention was given to determine the usability of the wastewater originated from the Cu recycling industry as a leaching agent. An average of 83% of Zn could be extracted from the TSL flue dust by employing the wastewater leaching with maximum selectivity. Purification of the leached solution was carried out by subsequently subjecting into cementation, oxidation-precipitation, 2-step neutralization, re-pulping, and drying steps, respectively. Recoverability of the Cu value of the flue dust by controlling cementation time and identification of Mn as the cause of the product color issue were remarkable approaches obtained from the purification process. Commercially salable ZnO (tire grade, purity >99.0%) could be synthesized as the final product by employing this novel process after the verification of technical and economic feasibility.

中文翻译：

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从铜回收行业产生的顶部浸没式喷枪 (TSL) 炉烟尘中合成轮胎级氧化锌

摘要 TSL烟尘是一种废渣，富含锌，产生于铜回收的火法冶金过程，是生产氧化锌的潜在原料。为了通过引入一种新工艺来评估这种废物的价值，在实验室和中试规模上研究了通过整合不同的商业上可行的湿法冶金技术来选择性去除杂质。特别注意确定源自铜回收工业的废水作为浸出剂的可用性。通过采用最大选择性的废水浸出，可以从 TSL 烟尘中提取平均 83% 的锌。浸出液的净化通过随后分别进行胶结、氧化-沉淀、两步中和、再制浆和干燥步骤来进行。通过控制胶结时间和确定 Mn 作为产品颜色问题的原因来恢复烟道粉尘的 Cu 值是从净化过程中获得的显着方法。在技​​术和经济可行性验证后，采用这种新工艺可以合成可商业销售的 ZnO（轮胎级，纯度 >99.0%）作为最终产品。