原位中和法脱除锰冶金浸出液中铁铝新过程研究

doi:10.11962/1006-4990.2018-0590

Abstract

Abstract:

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.

Key words: manganese metallurgy, MnSO₄ leaching solutions, in situ neutralization precipitation, removal of Fe and Al, slag loss

CLC Number:

TQ137.12

Zhang Hejie,Li Ping,Chen Xin,Wang Hongyan,Zheng Shili,Zhang Yi. 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.

Figures/Tables 11

References 16

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元素	质量分数/%	元素	质量分数/%
O	49.4	Fe	0.19
Al	41.5	P	0.12
S	7.23	Si	0.02
Mn	1.44

pH	温度/ ℃	过滤速率/（mL·s^-1）		pH	温度/ ℃	过滤速率/（mL·s^-1）
pH	温度/ ℃	原位中和	现行中和	pH	温度/ ℃	原位中和	现行中和
5.0	45	3.32	3.08	6.0	45	3.57	3.12
	75	4.32	3.10		75	4.91	3.18
	90	5.08	3.13		90	5.32	3.21

pH	温度/℃	过滤速率/（mL·s^-1）
pH	温度/℃	原位中和沉淀体系	现行中和沉淀体系
6	45	1.81	1.27
	55	2.86	2.05
	65	4.85	2.72
	75	8.13	5.12

项目		w（Mn）/ %	w（Fe）/ %	w（Al）/ %	w（Si）/ %	w（Ca）/ %
Mn矿粉		24.10	6.85	1.87	17.00	9.88
工业锰渣	工业除Fe、Al后锰渣	7.13	6.31	1.07	8.96	9.63
工业锰渣	Mn渣硫酸重浸渣	2.52	1.59	0.80	19.73	9.47
原位中和沉淀法锰渣	Mn矿焙烧浸出渣	2.72	0.81	0.29	10.88	6.88
原位中和沉淀法锰渣	原位中和除Fe、Al后锰渣	2.65	12.96	2.61	22.72	3.51

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Inorganic Acid-Base-Salt Committee of CIESC

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

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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