木质素还原浸出氧化锰矿的反应特性与微波强化

Based on the chemistry of lignin and leaching kinetics of manganese oxide ore, the combination of reduction leaching of manganese oxide ore and utilization of lignin is proposed in this project. The strengthening effect and mechanisms of microwave radiation in the process of chemical modification and degradation of lignin and reduction leaching of manganese oxide ore using lignin and its derivants as reductants will be studied systematically, and the reaction characteristics and law of microwave-assisted reduction leaching of manganese oxide ore will be revealed. According to hydrothermal reaction, sulfonation reaction, oxidation reaction and microwave intensification of these reactions, the structure and preparation method of lignin reductants will be optimized. The relationship of lignin reductant structure and its reduction leaching properties for manganese oxide ore and the leaching kinetic models will be studied, and the theoretical and technical system of microwave-assisted reduction leaching of manganese oxide ore using lignin and its derivants as reductants will be build. The new theory and technique will be used to utilize the abundant lignin by-product in paper industry,and manganese oxide ore will also be utilization with efficient and low-cost reduction leaching technology.This project is of great significance to efficient extraction of manganese oxide ore in our country, and is also important to the resource utilization of lignin.

本项目以木质素资源化学和氧化锰矿浸出动力学研究为基础，将氧化锰还原浸出技术与木质素的资源化利用有机结合，系统研究微波在木质素的化学改性与降解、木质素还原浸出氧化锰矿过程中的强化作用与机理，揭示微波强化木质素还原浸出氧化锰矿的反应特性和规律；通过木质素的水热反应、磺化反应、氧化反应特性与微波强化研究，确定适合于氧化锰还原的木质素类还原剂的优化结构及其化学改性方法；研究木质素类还原剂的结构与氧化锰矿浸出性能关系，建立浸出过程动力学模型，形成微波强化木质素还原浸出氧化锰矿的技术体系与理论基础。本项目充分利用我国造纸工业极为丰富的副产木质素资源，发展高效低成本的氧化锰还原浸出技术，不仅对于我国氧化锰矿资源的高效利用具有重大意义，而且对于木质素资源化利用具有重大价值。

本项目以微波强化木质素化学转化和微波强化木质素还原浸出氧化锰矿为核心，系统研究了微波强化木质素化学改性与降解、木质素湿法还原浸出氧化锰矿的行为及微波强化作用、碱木质素预还原浸出氧化锰矿的行为及微波强化作用、氧化锰矿的微波还原焙烧-酸浸过程、微波焙烧对黑土型氧化铁锰矿中锰和铁物相的影响等内容，揭示了木质素和微波还原氧化锰的还原与浸出反应动力学、物相转化与微观形貌变化等过程机理，为氧化锰矿的高效还原和木质素的综合利用提供了新途径。本项目充分利用我国造纸工业极为丰富的副产木质素资源，发展出高效低成本的氧化锰还原浸出技术，不仅对于我国氧化锰矿资源的高效利用具有重大意义，而且对于木质素资源化利用具有重大价值。