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在高澳矿配比下,研究了烧结原料理论液相量对烧结行为及烧结矿质量指标的影响。对烧结原料中的5种铁矿粉进行微型烧结实验。结果表明:铁矿粉液相生成能力与原料中FeO、SiO_2、CaO、MgO、Al_2O_3含量密切相关。随烧结理论液相量增多,成品烧结矿成本增加,烧结杯利用系数和烧结矿转鼓指数均相应提高。在烧结生产中,理论液相的质量分数不宜控制在10.40%~12.22%范围内。低于此范围,在原料成本较低情况下可以得到强度适宜的烧结矿;高于此范围,虽然原料成本增多,但烧结矿强度指标会明显改善,对后续的高炉生产有益。
Under high ore ratio, the influence of the theoretical liquid phase of sintering raw material on the sintering behavior and sinter quality index was studied. Five kinds of sintered iron ore powder sintering experiment. The results show that the liquid phase formation ability of iron ore is closely related to the contents of FeO, SiO_2, CaO, MgO and Al_2O_3 in the raw materials. As the amount of liquid phase increases with sintering, the cost of finished sinter increases, the utilization coefficient of sintering cup and the index of sinter drum increase accordingly. In the sintering production, the theoretical liquid mass fraction should not be controlled in the range of 10.40% ~ 12.22%. Below this range, sinter with appropriate strength can be obtained at lower cost of raw materials. Above this range, although the cost of raw materials increases, the strength index of sinter will be significantly improved, which is beneficial to the subsequent blast furnace production.