摘要
锰电解过程在(NH_(4))_(2)SO_(4)-MnSO_(4)体系进行时,需维持电解液pH值稳定在7.0~7.2。但阳极析氧反应使得长期电解条件下电解液pH值不断下降。生产上均使用氨水调节电解液pH值。但氨水易挥发,导致整个生产车间氨气味道刺鼻,影响身体健康。此外,持续加入氨水造成电解液中的氨不断累积膨胀,最终产生大量氨氮废水和氨氮锰渣。鉴于乙二胺与氨水的化学性质相似性,且具备更强的碱性及更低的挥发性,探索以乙二胺取代氨水作为pH值调节剂,以减少氨源的使用量、改善作业环境,探究乙二胺新体系电解锰的可行性。
In the manganese electrolysis process utilizing the(NH_(4))_(2)SO_(4)-MnSO_(4)system,it is necessary to maintain the pH of the electrolyte within the range of 7.0 to 7.2.However,the oxygen evolution reaction at the anode leads to a continuous decrease in the pH value of the electrolyte under long-term electrolysis conditions.In production,ammonia water is commonly used to regulate the pH value of the electrolyte.However,ammonia water is volatile,resulting in a pungent ammonia odor throughout the production workshop,which affects health.Furthermore,the continuous addition of ammonia water leads to continuous accumulation and expansion of ammonia in the electrolyte,ultimately generating a large amount of ammonia nitrogen waste water and ammonia nitrogen manganese slag.Given the similarity in chemical properties between ethylenediamine and ammonia water,and the former′s enhanced alkalinity and reduced volatility,this paper explores the feasibility of substituting ethylenediamine for ammonia water as a pH regulator in manganese electrolysis.The aim is to reduce the use of ammonia,improve the working environment,and evaluate the viability of a new ethylenediamine-based system for electrolytic manganese production.
作者
衷水平
常青瑶
陈俊南
张瑞莹
郭昊
何守兴
迟晓鹏
翁威
ZHONG Shuiping;CHANG Qingyao;CHEN Junnan;ZHANG Ruiying;GUO Hao;HE Shouxing;CHI Xiaopeng;WENG Wei(Zijin College of Geology and Mining,Fuzhou University,Fuzhou 350108,China;Fujian Key Laboratory of Green Extraction and High Value Utilization of New Energy Metals,Fuzhou 350108,China;Zijin Mining Group Co.,Ltd.,Shanghang 364200,Fuzhou,China)
出处
《矿冶》
CAS
2024年第5期654-661,669,共9页
Mining And Metallurgy
基金
大学生创新创业训练计划项目(S202410386121)
福建省自然科学基金青创项目(2023J05024)。
关键词
电解锰
pH值调节剂
乙二胺
电流效率
直流电耗
electrolytic manganese
pH value regulator
ethylenediamine
current efficiency
DC power consumption
