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A process consisting of direct reduction roasting and magnetic separation was adopted to separate and recover iron and titanium from ilmenite rough concentrate. A single factor experiment was conducted to explore effects of several factors, including reduction temperature, reduction time, coal powder dosage, borax dosage, bentonite dosage, grinding fineness, and magnetic field intensity, on the grades and recovery of iron concentrate and titanium concentrate. Then, the optimal processing parameters were finally determined. A reduction roasting runs at 1 200 ℃ for 2 h by adding coal powder at an amount of 40%, borax at 2% and bentonite at 2%, with a grinding fineness of 84% -38 μm, followed by a magnetic separation with field intensity of 79.62 kA/m, resulting in an iron concentrate grading 82.57% Fe at 83.59% recovery, and a titanium concentrate approaching 49.23% Ti grade at 85.18% recovery. It is shown that good beneficiation and smelting indicators are obtained.
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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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