原位中和法脱除锰冶金浸出液中铁铝新过程研究

在对前期已构建的溶液中铁铝成核和长大过程体系研究的基础上,开发了锰冶金过程硫酸锰浸出液原位中和脱除铁铝的新技术,同步脱除铁铝,将硫酸锰浸出液中的铝铁杂质由现行方法中的氢氧化铝和氢氧化铁直接转变成γ-AlOOH和α-FeOOH,替代现行工艺中采用的中和除铁铝方法,将渣中的锰带损由7%~8%降低到2%~3%,渣的过滤性能提高了50%。该方法没有大幅度改变现行工艺的各项条件,对于现行工业生产扰动小,同时能解决目前渣中锰吸附夹带量高、过滤性能差的问题,在提高锰直收率的同时降低了渣中的锰含量,兼顾环境和经济效益,为中国锰冶金清洁生产技术的推行提供助力。

New process research on removal of Fe and Al from MnSO4 leaching solutions of manganese metallurgy by in situ neutralization precipitation

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.