摘要
研究了酸介质及酸浓度对酸溶液处理高品位低活性天然二氧化锰（ＮＭＤ）焙烧物制得的活化天然二氧化锰（ＡＮＭＤ）放电活性的影响．结果表明，ＨＣｌ和ＨＮＯ３溶液均不能用作焙烧物酸处理的介质，而Ｈ２ＳＯ４溶液则是理想的介质．用３ＭＨ２ＳＯ４溶液处理焙烧物可制得放电性能与ＥＭＤ相当的产品．本文还研究了两种提高ＡＮＭＤ密度的方法：晶种法和金属离子聚沉法．两种方法均能提高产品ＡＮＭＤ的密度，晶种法效果特别明显，而金属离子聚沉法则提出了一种制备可充掺杂二氧化锰的新方法．
The present work is part of an investigation on the preparation of activated natural manganese dioxide (ANMD) for Zn MnO 2 battery use from natural manganese dioxide(NMD) with high MnO 2 content and low activity. The conversion of Mn 2O 3 in NMD calcine to MnO 2 by acid treatment is studied in this paper. The type and concentration of acid solution used for the conversion of Mn 2O 3 to MnO 2 are determined. It is found that the discharge perfromance of the ANMD product obtained from H 2SO 4 solution is better than those from HCl and HNO 3 solutions, and is best when 3 M H 2SO 4 solution is used. Besides, some methods are used to improve the density of ANMD product.
出处
《中国锰业》
北大核心
1996年第3期35-39,共5页
China Manganese Industry
