固体燃料料面分加低碳烧结技术
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Low-carbon sintering technology by layered charging of solid fuel on the sinter mix bed surface
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    摘要:

    烧结矿是高炉炼铁的主要含铁炉料,但其加工过程能耗高,是钢铁行业碳减排的重要工序。本文采用烧结 杯试验系统解析了固体燃料料面分加影响烧结的规律以及作用机理,并确定了适宜料面分加工艺制度。研究结 果表明:燃料料面分加具备提升烧结指标的潜力,但实现其在表层的均匀分布是有效发挥其提质降碳功能的关 键;增加燃料料面分加配比、提高其在表层的分加深度,烧结指标均呈现出先升高后降低的趋势,且随着用于分加 燃料粒度的增大,烧结各项指标呈上升趋势,因而适宜的燃料分加制度参数:分加配比宜为5%、分加燃料粒度宜 为>3 mm粗燃料颗粒、分加深度宜为50 mm,可将烧结固体燃耗从52.56 kg/t降低至50.51 kg/t。固体燃料料面 分加低碳烧结技术可优化料层高度方向热量分布的合理性,表层及上层烧结矿中黏结相矿物增多,且多为高强度 针状。研究结果可为该技术的工业应用提供理论指导和技术支持。

    Abstract:

    Sinter is the main iron-bearing furnace burden material for blast furnace ironmaking, but its processing is energy-intensive,so the process is a key process for carbon emission reduction in the iron and steel industry. In this paper a sintering pot test system was adopted to analyze the influence patterns and mechanisms of layered charging of solid fuel onthesintermixbedsuaceanddeteminetheappropriateprocesssysmfothelayeredchargingonthesintemixbed surface.The study results indicate that layered charging of fuel on the sinter mix bed surface has the potential to improve sintering performance;however, uniformly distributing the fuel on the surface layer is crucial for effectively serving its functions of enhancing quality and reducing carbon. By increasing the proportion of layered charging fuel on the bed surface,and enhancing the depth of layered charging fuel on the bed surface,the sintering indices initiallyincreasedand then decreased. Furthermore,as the particlesizeof the fuel used for layered charging increased,all sintering indicesshowed an upward trend. Therefore,the suitable layered charging parameters are as follows: the layered charging ratio should be 5,a fuel particle size should be >3 mm (coarse particles),and the layered charging depth should be 50 mm. Under these conditions the solid fuel consumption for sintering can be reduced from52.56 kg/t to 50.51 kg/t. The low-carbon sinteringtechnologyoflayeredchargingsoidfuelonthesintermixbedsurfacecanoptmizetherationalityofthethermal distribution along the bed height and make the amount of bonding phase minerals of the surface and upper layers of the sinter increase and make the form of them predominantly be high-strength acicular. The study findings can provide theoreticaguidanceandtechnicalsupportfortheindustrialapplicationofthistechnology.

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乐文毅,范晓慧,王兆才,赵改革,季志云,刘臣.固体燃料料面分加低碳烧结技术[J].烧结球团,2026,(1):101-110

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  • 在线发布日期: 2026-03-25
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