Abstract: In order to further investigate the mineral composition,main mineral distribution characteristics,and element occurrence forms of high-pressure sulfuric acid leaching residue of laterite nickel ores,and clarify suitable methods for valuable metal recovery and harmful impurity separation,process mineralogy research was conducted on the sample. Chemical multi-element analysis,chemical phase analysis,and SEM-EDS-BPMA mineral automatic quantitative analysis were used to analyze the chemical composition,particle size characteristics,element distribution,and mineral distribution characteristics of the sample in detail. The research results indicated that the acid leaching residue of laterite nickel ore is rich in elements with recycling value such as iron and aluminum,and has a high degree of mineral reconstruction. The main minerals include iron oxides,aluminum potassium sulfide iron oxides,magnetite / hematite,and chromite spinel minerals. The sample has extremely fine particle size, with a content of up to 77. 56% at -0. 010 μm,and the majority of the main minerals have particle sizes below 0. 038 μm;Iron oxide monomers have a high content and are closely associated with other major minerals. Due to the fact that iron,sulfur,and aluminum elements are mainly present in iron oxides,it is difficult to separate iron from other elements. The study provides important mineralogical basis for the development of efficient utilization schemes for such metallurgical secondary solid waste. 

Key words: acid leaching residue of laterite nickel ore,process mineralogy,automatic analysis,embedding relationship, , assignment state of elements