含铁含碳冶金固体废物转底炉热还原协同处置  

Synergistic treatment of iron and carbon containing metallurgical solid waste by rotary hearth furnace thermal reduction

作　　者：王啟胜 张浩浩 赵波 秦林波[1,3] 韩军 WANG Qisheng;ZHANG Haohao;ZHAO Bo;QIN Linbo;HAN Jun(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;MCC Southern Urban Environmental Protection Engineering Technology Co.,Ltd.,Wuhan 430081,Hubei,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]中冶南方都市环保工程技术股份有限公司,湖北武汉430000 [3]冶金矿产资源高效利用与造块湖北省重点试验室,湖北武汉430081

出　　处：《烧结球团》2024年第4期93-100,113,共9页Sintering and Pelletizing

基　　金：湖北省重点研发计划资助项目(2021BCA131,2022BCA085,2023BCB106)。

摘　　要：针对转底炉处置冶金固体废物过程中金属化率低、脱锌率低、粉化率高等问题,本文通过优化原料结构配比,改善球团的成球特性及高温还原性能,采用固体废物粉尘物理性能分析试验和圆盘造球机成球试验,研究含铁含碳冶金固体废物球团的成球性能变化,并在高温还原炉中进行热还原试验,考察球团的金属化率、脱锌率及粉化率。结果表明,原料结构配比优化显著改善了球团的成球特性和高温还原性能。当黏结剂添加量为6%,水添加量为13%时,生球性能最佳,其抗压强度、落下强度以及爆裂温度分别4.6 N/P、3次/(0.5 m)和442℃。在温度为1100~1150℃,高温还原时间为45~60 min时,球团金属化率可达88%,最佳脱锌率可达96%,粉化率为3%~5%。通过优化原料结构配比,可显著改善冶金固体废物球团的成球特性和高温还原性能,从而解决转底炉处置冶金固体废物的技术难题,为提高固体废物资源化利用提供技术支持。In addressing the challenges of low metallization rate,low dezincification rate and high pulverization rate during the disposal of metallurgical solid waste in converter furnaces,this paper aims to improve the pelletizing characteristics and high-temperature reducibility of pellets by optimizing the composition and structure of the raw materials.Physical property analysis experiments on solid waste dust,along with pelletizing experiments using a disc pelletizer,were conducted to investigate the changes in the pelletizing performance of iron and carbon-containing metallurgical solid waste pellets.Additionally,thermal reduction experiments were performed in a high-temperature reduction furnace to examine the pellets’metallization rate,dezincification rate,and pulverization rate.The findings reveal that optimizing the raw material composition significantly enhances the pelletizing characteristics and high-temperature reducibility of the pellets.Optimal green ball properties were achieved with a binder addition of 6%and water addition of 13%,resulting in a compressive strength of 4.6 N/P,drop strength of 3 times/(0.5 m),and a burst temperature of 442℃.Under thermal reduction conditions ranging from 1100 to 1150℃and a reduction time of 45 to 60 minutes,the pellets attained a metallization rate of up to 88%,an optimal dezincification rate of up to 96%,and a pulverization rate of 3%to 5%.By refining the raw material structure,the pelletizing characteristics and high-temperature reducibility of metallurgical solid waste pellets can be significantly improved.This approach addresses technical challenges associated with the converter furnace disposal of metallurgical solid waste and provides critical technical support for enhancing the resource utilization of solid waste.

关 键 词：含铁含碳 冶金固废 转底炉 球团 资源化处置 

分 类 号：TF046.6[冶金工程—冶金物理化学] X757[环境科学与工程—环境工程]