Comprehensive treating method for intermediate extraction stage of cobalt hydrometallurgy

• Main Authors: ZHENG LIANGMING, CAO GANG
• Format: Patent
• Language: Chinese; English
• Published: 29.06.2016
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a comprehensive treating method for an intermediate extraction stage of cobalt hydrometallurgy. According to the invention, ammonia water or recovered ammonia water is used for replacing caustic soda liquid to saponify P204 and P507, ammonia water is much cheaper than caustic soda liquid, the cost can be reduced by about 40% in comparison with the caustic soda liquid, however, the difficulty that ammonia-nitrogen wastewater is hard to treat is caused by replacing the caustic soda liquid with ammonia water. Therefore, the ammonia-nitrogen wastewater treatment process in the steps disclosed by the invention can simply and effectively handle the difficulty that ammonia-nitrogen wastewater is hard to treat due to replacement of the caustic soda liquid with ammonia water, thus realizing internal circulating use of the treated ammonia-nitrogen wastewater and greatly lowering cost. 本发明公开了一种钴湿法冶金中萃取阶段综合处理方法。本发明利用氨水或回收的氨水代替液碱用于皂化P204和P507，氨水比液碱便宜很多，可以比液碱降低约40％的成本，但是用氨水代替液碱也会带来氨氮废水难以处理的难题。为此本发明步