高铁氧化锰矿综合利用现状及还原焙烧发展趋势

锰被广泛应用于钢铁、化工、有色冶金、电池等领域。我国氧化锰矿大多数为高铁低锰的贫矿，冶炼前大多需要选矿预处理。常用工艺有高炉冶炼法、还原焙烧—浸出法、直接还原—浸出法。其中，还原焙烧—浸出工艺可以实现铁锰矿物的选择性分离，综合资源利用率高，但焙烧过程的能耗很大。对铁锰矿物同步还原反应热力学条件与动力学过程进行研究，明确氧化铁矿物磁化还原与氧化锰预还原交互作用及同步还原规律、氧化锰和氧化铁矿矿相转变和晶型转变规律、还原过程中粘结物的矿物组成和粘结方式，为实现铁矿物和锰矿物低温还原，节约能源消耗提供理论依据。

Present Situation of Comprehensive Utilization of High Iron Manganese Oxide Ore and Development in Reduction Roasting

Manganese is widely used in steel, chemical, non-ferrous metallurgy, batteries and other fields. Most of the manganese oxide ore in China are lean ore with high iron and low manganese, and most of them need beneficiation pretreatment before smelting. Commonly used processes include blast furnace smelting method, reduction roasting-leaching method, and direct reduction-leaching method. Among them, the reduction roasting-leaching process can realize the selective separation of iron and manganese minerals, and the comprehensive resource utilization rate is high, but the energy consumption of the roasting process is large. The thermodynamic conditions and kinetics of the simultaneous reduction of iron and manganese minerals must be studied, and the interaction between the magnetization reduction of iron oxide minerals and the pre-reduction of manganese oxide and the law of simultaneous reduction, the phase transformation and crystal form transformation of manganese oxide and iron oxide ore must be clarified, the mineral composition and bonding method of the bond during the reduction process. Provide a theoretical basis for realizing the low-temperature reduction of iron minerals and manganese minerals and saving energy consumption.