钙锰矿是表生环境中常见的隧道构造氧化锰矿物,常由层状构造的Na-布塞尔矿或水钠锰矿(Na-布塞尔矿脱水产物)经不同离子交换后在热液条件下转化而成。Na-布塞尔矿与离子交换过程中溶液pH对Me-布塞尔矿亚结构及常压下向钙锰矿的转化有重要影响。本文以Na-布塞尔矿为前驱物,探讨了pH对Cu-布塞尔矿形成及其在常压回流条件下向隧道构造钙锰矿转化的影响。结果表明,不控制pH值时,随着溶液中交换性Cu2+数量的增加,前驱物Na-布塞尔矿层间Na+离子的数量逐渐减少,直至被Cu2+离子完全交换。层间的Mn2+只有在加入的Cu2+达到一定量时才能被置换出来,体系pH值随着CuC l2加入量的增加而降低。随着进入Na-布塞尔矿层间Cu2+离子数量的增加,经回流转化后逐渐生成结晶度较好的钙锰矿相,但加入量超过一定量时,不能转化形成钙锰矿。在控制pH为4.5的体系中进行离子交换时,钙锰矿的形成随着Cu2+离子的增加而增加,并在高加入量时也可完全转化形成钙锰矿。上述两种转化的差异与pH变化所引起的Na-布塞尔矿亚结构变化及交换性Cu2+离子在其层间分布的形态密切相关。 Manganese ore is a common epigenetic tunnel structure of manganese oxide minerals, often by the layered structure of Na-Bussel mine or birnessite (Na-Bushehr mine dehydration products) by different ion exchange after hydrothermal conditions Under the conversion. The pH of the solution during the Na-Bessel mine and ion exchange has a significant effect on the substructure of the Me-Buserite ore and the conversion to calcium and manganese ore at atmospheric pressure. In this paper, the Na-Bussel mine is used as a precursor to investigate the effect of pH on the formation of Cu-Bessel mine and the conversion of ore into tunnel structure under atmospheric pressure. The results show that when the pH value is not controlled, the amount of Na + ions in the precursor Na-Bessel deposit decreases gradually with the increase of exchangeable Cu2 + in solution until it is completely exchanged by Cu2 + ions. The interlayer Mn2 + can be displaced only when the amount of Cu2 + added reaches a certain amount. The pH of the system decreases with the increase of CuCl2. With the increase of the amount of Cu2 + ions entering into the Na-Bussel deposit, a better crystallized calcium-manganese ore phase was formed by reflux conversion. However, when the added amount of Cu2 + ions exceeded a certain amount, they could not be transformed into calcium-manganese ore. When ion exchange is performed in a system of pH 4.5, the formation of the oreite increases with the increase of Cu 2+ ions and can also be fully converted to the ore of manganese ore at high additions. The difference between the above two transformations is closely related to the change of substructure of Na-Bessel ore caused by pH change and the morphology of exchangeable Cu2 + ions in the interlayer.