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In the paper, the study on effect laws of ore proportioning structure on quality of pellet is carried out aiming at such problems as low strength and high reduction swelling rate of manufactured pellet caused by high contents of such harmful elements as K, Na, F and S in iron ore concentrate of Bayan Obo. The study results showed that the pellet could be promoted to be fully oxidized, compressive strength of pellet could be improved and reduction swelling of pellet could be restrained by adding high silicon hematite and high magnesium magnetite with low contents of sulfur and alkali metal. The compressive strength of pellet could be significantly increased to 2 380 N and reduction swelling rate could be reduced to 13.2% with the scheme of optimizing ore proportioning that 52% iron ore concentrate of Bayan Obo+32% high silicon and low sulfur magnetite concentrate+8% high silicon hematite concentrate+8% high silicon high magnesium magnetite concentrate, which could provide the theoretical support and technical path for preparing high quality pellet with iron ore concentrate of Bayan Obo.
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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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