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Outline
By adopting coal-based hydrogen metallurgy technology, nickel smelting slag was ground to-0.038 mm (90.02% passing size), and magnetite concentrate was added for oxygen regulation. Coal-containing pellets were prepared with nickel slag, magnetite concentrate, Guanghui coal and bentonite at a mass ratio of 100∶10∶26∶2, a roasting temperature within 1 280-1 300 ℃ and roasting time of 35 min. A reaction between hydrogen-rich gas produced by the pyrolysis of high-volatile coal and the water gas resulted in a strong reduction coupling effect. The results show that the metallization rate of pellets reaches 92.91% and the iron content in magnetic separation concentrate is 85.80%. It is concluded that this technology significantly optimizes the reduction kinetics of nickel slag, providing a new route for the efficient utilization of iron resources in nickel slag.
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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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