Abstract
Flotation technology of the recovery and utilization of ilmenite from tailings of iron beneficiated in Panzhihua was investigated based on mineralogical study. The results of mineralogical study show that the main occurrence of the valuable mineral are liberated grains of ilmenite. Experimental results of flotation conditions show that attrition-scrubbing raw ores exhibit good flotability with higher recoveries and a slight decrease in grade compared to ores without attrition-scrubbing. Further, open-circuit experiments also prove the superiority of attrition-scrubbing raw ores. The results of closed-circuit experiments show that qualified ilmenite concentrate can be obtained and the yield, grade, and recovery are 22.26%, 47.06%, and 60.73%, respectively. Theoretical study and analysis show that there are two contributions to superior flotability for attrition-scrubbing samples. The first is that the attrition-scrubbing samples can uncover more ferrous ions on the newly-produced fresh ilmenite surface, resulting in the increase in active sites. The other is that in the process of attrition-scrubbing, the transformation of ferrous ions to ferric ions can be promoted.
Highlights
Titanium and its alloy are widely studied with many advantages, such as corrosion resistance, higher strength to weight ratio, biocompatibility, and good temperature resistance [1,2,3]
Based on the analysis shown in Section 3.1.1, ilmenite is the main titanium-containing mineral phase and the content can reach approximately 90%
Attrition-scrubbing samples can increase the recovery by 7.52% and a slight decrease in grade by 0.1%. These results suggest that after attrition-scrubbing, ilmenite can interact with the collector more strongly and consistently
Summary
Titanium and its alloy are widely studied with many advantages, such as corrosion resistance, higher strength to weight ratio, biocompatibility, and good temperature resistance [1,2,3]. It has been extensively applied in aerospace, medicine, navigation, and catalytic industries. There are many pretreatment methods to improve its flotability, such as the surface dissolution method, oxidation roasting, microwave irradiation, and introducing ions. These pretreatment methods are collectively referred to as surface modification [6,7]. Theattrition-scrubbing; results of X-ray photoelectron spectrometer (XPS) tests for raw ilmenite ore: (a) samples without attrition-scrubbing; (b) attrition-scrubbing samples.
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