【摘要】 研究用LiOH.H2O与多金属结核合成Li1+xMn2-xO4过程中矿物的热力学行为。根据热力学数据ΔG和ΔH的计算结果,多金属结核中的锰矿物、针铁矿在加热过程中均会分解,针铁矿稳定性较锰矿物差。多金属结核中的铜镍元素虽吸附在锰矿物中,但加热时不能与锰矿物形成复合氧化物。铜钴镍均能与针铁矿形成复合氧化物,在172~760℃范围内铜铁复合氧化物能稳定存在,但含量小于1%。镍铁复合氧化物在25~500℃范围内能稳定存在,当温度大于500℃时会完全分解。钴铁复合氧化物在25~1000℃范围能稳定存在,性质最稳定。260~436℃温度段为形成复合氧化物的主要阶段,XRD图中出现了复合氧化物的前两强峰,热力学分析结果与实验结果相符合。更多还原

【Abstract】 The thermodynamic performance of various minerals in ocean multi-metal nodule in the process of Li1+xMn2-xO4 synthesis with LiOH·H2O and ocean multi-metal nodule as raw material is investigated.It is shown by the calculation results of the thermodynamic data ΔG and ΔH that manganese ore and goethite in multi-metal nodule will be decomposed and goethite is more unstable at calcinations process. Cupper,cobalt and nickel absorbed by multi-metal nodule can not form composite oxide with manganese ore,but can form composite oxide with goethite.From 172℃ to 760℃,the composite oxide of cupper-iron is stable and the content is below 1%.From 25℃ to 500℃,the composite of nickel-iron is stable and will be decomposed above 500℃.From 25℃ to 1000℃,the composite of cobalt-iron is stable.The composite oxides are formed from 246℃ to 436℃.There are two main peaks in XRD diagram.The thermodynamic result is agreement with experiment result.更多还原