Effective Utilization of Limonitic Nickel Laterite via Pressurized Densification Process and Its Relevant Mechanism

摘要: Limonitic laterite contains low iron and nickel grades much high smelting minerals loss on ignition (LOI), identified as refractory ore for sintering. Thus, sinter pot tests of limonitic via pressurized densification sintering its intensification mechanism were conducted, the industrial application prospect was explored. The results indicate that performance new process is significantly improved with tumble index productivity increased by 19.2% 18.6%, respectively, solid fuel rate lowered 10.3%. external pressure field promotes synchronization heat front velocity combustion better mass transfer conditions, which also greatly improves mineral compositions microstructure product sinter. converted from large thin-wall pores into small or thick-wall porosity decreased 42.4%. Much close interlocking texture between hercynite silico-ferrite calcium alumina (SFCA) formed grains aggregation growth, SFCA amount substantially increased. will bring about a remarkable economic benefit 282.78 million RMB/a if implemented. considered one effective technologies improving