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To investigate the effect of varying magnetization times on the reverse flotation of fine-grained hematite, water, reagents, and slurry were subjected to magnetization treatments of differing durations. By measuring the conductivity and surface tension of the solution, the viscosity of the solution and slurry, and the changes in infrared and Raman spectra of the mineral particle surfaces at different magnetization times, the mechanism by which magnetization time influences the reverse flotation of hematite was revealed. Results indicate that the magnetization effect is optimal at an 8-minute magnetization time. Magnetized water, starch and slurry can enhance hematite recovery rates by 2.3 percentage points, 4.16 percentage points and 3.84 percentage points respectively, whereas magnetized dodecyl amine reduces hematite recovery by 3.56 percentage points. Magnetization increases the solution's electrical conductivity, enhancing the solubility of reagents and the concentration of electrolytes within the solution. It also elevates viscosity, thereby strengthening the inhibitor's efficacy and preventing hematite particles from floating. Furthermore, it reduces the solution's surface tension, facilitating the adhesion of quartz to bubbles and improving the recovery rate in hematite reverse flotation. Infrared spectroscopy analysis indicates that magnetization influences the interaction between the reagent and the mineral surface, altering the amount of reagent adsorbed onto the mineral surface.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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