Ethylenediamine as a new pH valueregulator for electrolytic manganese
In the manganese electrolysis process utilizing the(NH4)2SO4-MnSO4 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.
electrolytic manganesepH value regulatorethylenediaminecurrent efficiencyDC power consumption
万方数据
维普
