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理论燃烧温度不是喷吹效果的唯一条件。在热风温度高于900℃的情况下,高炉喷吹数量和效果主要取决于炉况顺行情况。提高冶炼强度是提高喷吹量和效果的主要因素。在鞍钢目前原料条件下,冶炼强度可提高到1.1以上。调整风口长度不仅可以活跃炉缸中心,而且有利于活跃炉缸边缘,达到活跃整个炉缸的作用。缩短风口长度和大料批是强化高炉冶炼的必然趋势。改进造渣制度及减少渣量对高炉强化具有十分重大的意义。在鞍钢可以从改进炉渣性能着手。提高烧结矿及渣中氧化镁含量,可使初、终渣稳定,高炉顺行,焦比降低,产量提高。
The theoretical combustion temperature is not the only condition for injection. In the hot air temperature is higher than 900 ℃ under the circumstances, blast furnace injection quantity and effect depends on the furnace conditions. Improve the smelting strength is to increase the amount of injection and the main effect of the effect. In Anshan Iron and Steel’s current raw material conditions, smelting strength can be increased to 1.1 above. Adjusting the tuyere length not only activates the center of the hearth, but also facilitates the active edge of the hearth to achieve an active hearth. Shortened tuyere length and large batch are the inevitable trend to strengthen blast furnace smelting. Improve the slagging system and reduce the amount of slag to enhance the blast furnace is of great significance. Anshan Iron and Steel can start from improving slag performance. Increasing the content of magnesia in sinter ore and slag can stabilize the initial and final slag, reduce the coke ratio and increase the output of blast furnace.