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In this paper, it is analyzed the causes of abnormal temperature increase of side wall at tap hole for hearth of 7# blast furnace of Baotou Steel and emphasized the treatment measures. With the long-term high-intensity smelting conditions, tap hole of hearth is relatively active and its length is controlled poorly so that scour of slag iron to carbon brick of tap hole is aggravated. As a result, the erosion of carbon brick of tap hole is the cause for temperature increase of side wall at tap hole for hearth of 7# blast furnace. The temperature of side wall at tap hole is effectively controlled without reducing the smelting intensity and output of 7# blast furnace through taking such measures as increasing the quantity of circulating water at tap hole to improve cooling intensity, carefully maintaining tap hole, actively eliminating air gap of hearth side wall as well as appropriately opening central gas stream and restraining gas stream at edge for the charging system.
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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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