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Outline
As for the acid leaching residue of lateritic nickel ore with a TFe grade of 51.38% and S content of 2.01%, a comparative experimental study was carried out for different phase transformation processes. The results show that tests with magnetizing roasting and direct reduction roasting processes generate roasted products containing a wide variety of minerals with complex dissemination characteristics, which is not conducive to subsequent iron-sulfur separation and sorting operations. The lateritic nickel ore, after having been roasted at a hydrogen-rich environment at 900 ℃ for 60 min, is subjected to grinding and magnetic separation, producing a low-sulfur iron concentrate with a TFe grade of 72.50% and a S content of 0.067%. It is concluded that such roasting process at a hydrogen-rich environment can make iron and sulfur effectively separated from each other, which is conducive to subsequent smelting operations.
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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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