Oxidation Activity Evaluation of Sulfide Ores Based on Weight Gain Rate Fusion Under Different Oxidation Conditions
This article describe a low temperature oxidation experiment and nine different sulfide ore samples to investigate a new evaluation method of oxidation activity of sulfide ores. The measured weight gain rate was studied by integrating wavelet de-noising and fuzzy comprehensive evaluation. The results show that mass variation trend of ore samples during the low temperature oxidation process consists of three stages: rapidly increasing, slowly increasing and unchanged. Content of water-soluble iron ion and sulfate ion of ore samples increase after oxidation. The surface of ore samples is relatively smooth and the particles are uniform before oxidation. After oxidation, ore samples surface is loose and porous, and there is obvious agglomeration of ore samples on the surface. The order ore samples oxidation activity is: Samples #2, #8, #5, #4, #9, #7, #1, #6 and #3.
KeywordsSulfide ores Oxidation activity Low temperature oxidation Weight gain rate Comprehensive evaluation
This study was funded by the National Natural Science Foundation of China (Grants nos. 51304238, 51534008) and Innovation Driven Plan of Central South University (Grant no. 2015CX005).
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