Method and system for recycling aluminum electrolysis overhaul slag

• Main Authors: WANG XUN, LI DONGSHENG, SHI ZHIRONG, YOON DAE-WI, LUO, YINGTAO, CUI MENGQIAN, LUO ZHONGSHENG, JING QUANHAI, SUN LIZHEN, LIU JIANJUN, CHEN KAIBIN, DU TINGTING, LI RUONAN
• Format: Patent
• Language: Chinese; English
• Published: 17.06.2022
• Subjects: CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; INORGANIC CHEMISTRY; METALLURGY

The invention discloses a method and a system for recovering aluminum electrolysis overhaul slag, relates to the technical field of aluminum industry, and aims to improve the recovery rate and the recovery purity of fluoride, save water and avoid secondary pollution. The recovery method of the aluminum electrolysis overhaul slag comprises the following steps: carrying out at least one time of leaching and at least one time of solid-liquid separation on the aluminum electrolysis overhaul slag by utilizing a leaching solution; and recycling the leaching liquid obtained by solid-liquid separation. 本申请公开一种铝电解大修渣的回收方法及系统，涉及铝工业技术领域，能够提高氟化物的回收率和回收纯度，节约用水，不会造成二度污染。铝电解大修渣的回收方法，包括：利用溶浸液，对铝电解大修渣进行至少一次溶浸和至少一次固液分离；对固液分离得到的溶浸液进行循环利用。