摘要
红土镍矿的低温还原热力学和低温还原动力学研究表明,在1 350℃左右半熔融状态下可以得到镍铁合金颗粒。利用微波内加热和选择性加热的特点,能够明显改善加热效率和渗碳效果,促进弥散在炉渣中的镍铁粉聚集长大成镍铁颗粒。在此基础上研发出红土镍矿低温还原+微波冶炼镍铁新技术,并建成了世界上第一条新技术示范生产线。与RK-EF工艺相比,新技术取消了后续的电炉熔炼工艺,使冶炼温度降低了250℃左右,电耗降低45%以上。新技术实现了高效率、低能耗、环保及低成本生产镍铁合金。
The thermodynamics and kinetics of the low-temperature reduction of laterite nickel ore show that the ferronickel alloy particles can be obtained at semi-molten state at about 1 350 ℃.The internal heating and selective heating of microwave can obviously improve the heating efficiency and carburizing effect,and promote the accumulation of nickel iron powder dispersed in the slag to form the ferronickel particles.On this basis,the new technology of microwave smelting ferronickel with low temperature reduction of laterite nickel ore has been developed,and the world＇s first new technology demonstration production line has been built.Compared with the RK-EF process,the new technology cancels the subsequent electric smelting furnace,reduces the smelting temperature by about 250℃,and makes the power consumption decrease by more than 45%.The new technology enables the production of nickel iron alloy with high efficiency,low energy consumption,environmental protection and low cost.
作者
庞建明
赵沛
郭培民
PANG Jian-ming ZHAO Pei GUO Pei-min(Resource Application and Alloy Materials Division, China Iron and Steel Research Institute Group, Beijing 100081, China)
出处
《中国冶金》
CAS
2017年第9期70-76,共7页
China Metallurgy
关键词
红土镍矿
低温还原
微波冶炼
半熔融态
lateritic nickel ore
low-temperature reduction
microwave smelting
semi-molten
