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天铁360 m2烧结机提产降耗生产实践

Productuion practice of energy saving and consumption reduction for Tiantie 360 m2 sintering machine

  • 摘要: 为提高烧结矿产量、降低返矿率及烧结过程中的固体燃料消耗,针对天铁360 m2烧结机,提出了调整熔剂种类、优化燃料结构及实施设备改造等措施。熔剂方面,选用CaO含量超90%的高活性熔剂;燃料方面,通过烧结杯实验与热重分析,将煤粉与焦粉比例调整为1∶2,并严格控制燃料中粒度小于1 mm的占比;工艺流程与设备改造方面,采取增加逆流衬板以强化制粒、提升余热利用效率以提高混合料料温、改进烧结矿转运方式等手段。上述措施有效强化了烧结过程,使混合料平均粒径提升至4.94 mm,料温从70℃提高至85~90℃;烧结返矿率由16%降至12%,固体燃料消耗从45.04 kg·t-1降至44.25 kg·t-1,烧结矿日产量则由13 000 t增至15 000 t,成功实现了提产降耗的目标。

     

    Abstract: To increase the sinter output, reduce the return fine rate and the solid fuel consumption in the sintering process, measures such as adjusting the flux type, optimizing the fuel structure and carrying out equipment transformation were proposed for the 360 m2 sintering machine of Tiantie Group. In terms of flux, a high-activity flux with a CaO content of more than 90% was selected. For fuel, the ratio of pulverized coal to coke breeze was adjusted to 1∶2 through sintering pot tests and thermogravimetric analysis, and the proportion of fuel with a particle size of less than 1 mm was strictly controlled. In respect of the process flow and equipment transformation, methods including adding countercurrent liners to strengthen granulation, improving waste heat utilization efficiency to raise the mixture temperature, and modifying the sinter conveying mode were adopted. The above measures effectively intensified the sintering process, increasing the average particle size of the mixture to 4.94 mm and raising the mixture temperature from 70 ℃ to 85~90 ℃. The sinter return fine rate decreased from 16% to 12%, the solid fuel consumption reduced from 45.04 kg·t-1to 44.25 kg·t-1, and the daily sinter output increased from 13 000 t to 15 000 t, thus successfully achieving the goals of increasing production and reducing consumption.

     

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