钢铁冶金含锌固废制备含碳压块的工艺参数优化
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朱昊喆(2001—),男,硕士研究生,从事冶金环保与资源高值化利用方面的研究。

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TF46.6;X757

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国家自然科学基金资助项目(52174325);陕西省创新能力支撑计划资助项目(2023CXTD53);中央引导地方科技发展资金资助项目(24ZYQB003)


Optimization of process parameters for preparation of carboncontaining briquettes from zinccontaining solid waste in iron and steel metallurgy
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    摘要:

    为实现钢铁冶金含锌固废的高效资源化利用,并解决其含碳冷压块强度不足的问题,本文以转炉高锌污泥和兰炭为主要原料,系统开展了压块制备工艺优化及黏结剂性能研究。通过优化冷压工艺参数( 水分添加量为8%、成型压力为16 MPa)及真空焙烧制度(1 100 ℃、40 min),重点探究了膨润土、水泥、氧化钙及创新型黏结剂腻子粉对压块强度的影响规律与作用机理。结果表明,腻子粉凭借其独特的有机- 无机复合黏结体系(HPMC 与水泥、石膏协同作用),在最低添加量(3%)下即可实现最优的增强效果,其干压块抗压强度达571. 2 N/ P,还原后金属化团块强度高达840. 4 N/ P,显著优于传统黏结剂,且完全满足转炉入炉的强度要求( >800 N/ P)。热力学分析表明,在10 Pa 真空度下,铁酸锌等含锌物相的碳热还原反应在600 ℃以上均可自发进行,升温至1 100 ℃可显著促进锌的挥发脱除。本文研究结果可为钢铁冶金含锌固废制备高性能含碳压块提供有效的工艺参数与黏结剂选择依据。

    Abstract:

    In order to realize the efficient resource utilization of zinc-containing solid waste in iron and steel metallurgy and solve the problem of insufficient strength of its carbon-containing cold briquettes,converter high-zinc sludge and blue carbon are used as the main raw materials,and the optimization of the briquetting process and binder properties are systematically carried out. By optimizing the cold pressing process parameters (8% moisture addition,forming pressure of 16 MPa) and vacuum roasting system (1 100 ℃,40 min),the effects of bentonite,cement,calcium oxide and innovative binder putty powder on the strength of briquettes were explored. The results show that,with its unique organic-inorganic composite bonding system ( HPMC synergizes with cement and gypsum), putty powder can achieve the optimal reinforcement effect at the lowest addition amount (3%),and its compressive strength of dry briquettes reaches 571. 2 N/ P, and the strength of metallized aggregates after reduction is as high as 840. 4 N/ P,which is significantly better than traditional binders,and fully meets the strength requirements of converter furnace ( >800 N/ P). Thermodynamic analysis shows that the carbothermal reduction reaction of zinc-containing phases such as zinc ferrite can be carried out spontaneously above 600 ℃ at a vacuum of 10 Pa,and the volatilization removal of zinc can be significantly promoted when the temperature rises to 1 100 ℃. The results can provide an effective process parameters and binder selection basis for the preparation of high-performance carbon-containing briquettes from zinc-containing solid waste in iron and steel metallurgy.

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朱昊喆,张朝晖,折媛,邢相栋,郭鹏辉.钢铁冶金含锌固废制备含碳压块的工艺参数优化[J].烧结球团,2026,(2):123-131

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  • 最后修改日期:2025-09-01
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  • 在线发布日期: 2026-07-21
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