高强度含锌粉尘内配碳球团制备工艺
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作者单位:

1.广西大学 资源环境与材料学院,广西 南宁 530004 ;2.中南大学 资源加工与生物工程学院,湖南 长沙 410083 ;3.河池学院,广西 河池 546300

作者简介:

李航宇(2000—),男,硕士研究生,从事矿物资源利用与开发研究。

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中图分类号:

TF046.6;X757

基金项目:

国家自然科学基金青年科学基金资助项目(52304282)


Preparation process of carbon-burdened pellets in high-strength zinc-containing dust
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Affiliation:

1.College of Resources, Environment and Materials, Guangxi University, Nanning 530004 , Guangxi, China ;2.School of Resources Processing and Bioengineering, Central South University, Changsha 410083 , Hunan, China ;3.Hechi University, Hechi 546300 , Guangxi, China

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    摘要:

    为提高钢厂含锌粉尘的成球性能,制备出高强度含锌粉尘内配碳球团,本文开发了含锌粉尘预润湿—造球工艺。针对该工艺开展含锌粉尘内配碳球团制备工艺参数优化试验,探究润湿过程中粉尘的温度变化以及润湿对粉尘的化学成分、接触角等物理化学性质的影响,并考察润湿条件、造球水分、造球时间、黏结剂用量对生球和干球抗压强度、爆裂温度的影响。研究结果表明,在最优工艺参数下,制备出的生球落下强度达19.1次/(0.5m),抗压强度可达 78N/P,爆裂温度为 518℃,干球的落下强度达 19.6次/(1m),抗压强度为 155N/P。随后在还原温度为 1200℃、还原时间为 50min的条件下对该含锌粉尘内配碳干球进行直接还原,最终可制备出铁品位为 73.6%、铁金属化率为 90.7%、抗压强度为 1164N/P、残锌质量分数仅为 0.07%的还原球团,该含锌粉尘金属化球团可直接作为高炉原料。

    Abstract:

    In order to improve the pelletizing performance of zinc-containing dust in steel mills and produce carbon-burdened pellets in high-strength zinc-containing dust, a pre-wetting-pelletizing process for zinc-containing dust is developed. In this paper, the test of the process parameter optimization for the production of carbon-burdened pellets in zinc-containing dust is carried out, the temperature change of dust during wetting and the influence of wetting on the physical and chemical properties of dust including chemical composition and contact angle are explored, and the effects of wetting conditions, pelletizing moisture, pelletizing time and binder dosage on the compressive strength and bursting temperature of fresh pellet and dry bulbs are investigated. The results show that under the optimal process parameters, the fresh pellet falls with a falling strength of 19.1 times/(0.5 m), a compressive strength of 78 N/P, a bursting temperature of 518 °C, and dry pellet falls with a falling strength of 19.6 times/(1 m) and a compressive strength of 155 N/P. Subsequently, under the conditions of reduction temperature of 1,200 °C and reduction time of 50 min, the carbon-burdened dry pellets in the zinc-containing dust are directly reduced, and finally the reducing pellets with an iron grade of 73.6%, an iron metallization rate of 90.7% , a compressive strength of 1 164 N/P and a residual zinc mass fraction of only 0.07% could be produced, which could be directly used as raw materials for blast furnaces.

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李航宇,王定政,朱德庆,杨金林,马少健.高强度含锌粉尘内配碳球团制备工艺[J].烧结球团,2025,50(2):63-71

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  • 收稿日期:2024-06-28
  • 最后修改日期:2024-09-23
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  • 在线发布日期: 2025-11-17
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