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New process research on removal of Fe and Al from MnSO4 leaching solutions of manganese metallurgy by in situ neutralization precipitation
Received date: 2019-03-22
Online published: 2020-06-10
A new technology for Fe and Al removal from MnSO4 leaching solutions of manganese metallurgy by in situ neutralization precipitation was developed to decrease the loss of Mn and improve the filtration performance of Mn-containing residues,based on the pre-established nucleation and growth system of Fe and Al in the solutions.The results showed that the γ-AlOOH and α-FeOOH had been prepared by the new technology instead of conventional Al（OH）3 and Fe（OH）3 obtained from the neutralization process from MnSO4 leaching solutions.Mn loss decreased from 7%~8% to 2%~3% while the filtration rate of Mn-containing residues increased 50%.The technology did not greatly change the various conditions of the current process,and had little disturbance to the current industrial production.The technology also effectively resolved the high Mn contents and bad filtration performance of Mn-containing residues,not only increasing the direct yield of Mn,but also decreasing Mn content of residues.It has environmental and economic benefits and provides assistance for the implementation of China’s manganese metallurgical clean production technology.
Hejie Zhang , Ping Li , Xin Chen , Hongyan Wang , Shili Zheng , Yi Zhang . New process research on removal of Fe and Al from MnSO4 leaching solutions of manganese metallurgy by in situ neutralization precipitation[J]. Inorganic Chemicals Industry, 2019 , 51(9) : 67 -71 . DOI: 10.11962/1006-4990.2018-0590
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