(1. 廣東省資源綜合利用研究所，廣州 510650；
2. 稀有金屬分離與綜合利用國家重點實驗室，廣州 510650；
3. 廣東省礦產資源開發(fā)和綜合利用重點實驗室，廣州 510650；
4. 中南大學 資源加工與生物工程學院，長沙 410083)
摘 要: 使用硫化燒結-浮選工藝處理含銅、鎳的電鍍污泥，采用MLA分析和掃描電鏡分析等手段，研究污泥樣品硫化燒結前后的性質變化；并通過Cu-S-O與Ni-S-O三元系等溫優(yōu)勢區(qū)位分析，以及燒結的條件試驗，確定了適宜的硫化燒結條件：硫化劑用量為20%，燒結溫度為1100℃，燒結時間為90 min。通過燒結產品的閉路浮選試驗，獲得了銅、鎳品位分別為10.14%和11.89%，銅、鎳作業(yè)回收率分別為75.12%和70.02%的浮選精礦。通過浮選尾礦的浸出毒性鑒定，確定尾礦中有害金屬元素的浸出毒性測試結果均小于國家標準。通過硫化燒結-浮選工藝，同步實現了含銅、鎳電鍍污泥的資源化和無害化處理。
關鍵字: 電鍍污泥；硫化燒結；浮選；資源化；無害化
（1. Guangdong Institute of Resource Comprehensive Utilization, Guangzhou 510650, China;
2. State Key Laboratory of Rare Metals Separation and Comprehensive Utilization, Guangzhou 510650, China;
3. Guangdong Province Key Laboratory of Mineral Resource and Comprehensive Utilization, Guangzhou 510650, China;
4. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The electroplating sludge is a kind of high toxicity and pollution industrial solid waste, which is greatly harmful on the environment as direct discharging. The sulfidation sintering-flotation process was used to dispose a copper-nickel-bearing electroplating sludge. The changes of mineralogy properties about the electroplating sludge before and after sintering were investigated by MLA analysis and SEM analysis. The isothermal predominance area phase diagrams of Cu-S-O and Ni-S-O ternary systems were drawn to analyze the optimum conditions of the sulfidation sintering. Through a series of conditional experiments, the optimum experimental conditions of sulfurizing reagent dosage, sintering temperature and sintering time were confirmed as 20%, 1100 ℃ and 90 min, respectively. By the closed-circuit flotation test of sintered products, the flotation concentrates with copper grade of 10.14% and nickel grade of 11.89% are obtained, and the recovery of copper and nickel are 75.12% and 70.02%, respectively. Moreover, in the leaching toxicity test of flotation tailings, the test concentrations of the poisonous heavy metal ions all reach the related government standards. Through the sulfidation sintering-flotation process, the goals of metal elements reclamation and harmless dispose of the electroplating sludge are both achieved.
Key words: electroplating sludge; sulfidation sintering; flotation; reclamation; harmless
