无烟煤粒度对焦炭质量的影响研究

Research on the influence of anthracite particle size on quality of coke

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摘要我国炼焦煤资源供需矛盾突出,配入无烟煤炼焦是降低生产成本并扩大煤种资源利用的有效途径,无烟煤粒度对焦炭质量的影响研究可用于指导无烟煤在配煤炼焦中的技术应用。以典型1/3焦煤和不同粒度的无烟煤为研究对象,结合煤质特性分析并通过40 kg小焦炉开展炼焦实验。由研究发现,配入无烟煤可使焦炭的灰分降低、固定碳含量升高以及发热量提升。焦炭块度随无烟煤粒度减小而增大,表面平整且气孔均匀分布,当粒度大于3 mm时,焦炭易碎且无烟煤颗粒明显可见。焦炭强度随无烟煤粒度增加而降低,当无烟煤粒度小于0.5 mm时,焦炭CSR为70.1%,M40为88.4%。当无烟煤配入粒度小于0.5 mm时,焦炭平均粒度为52.0 mm,其粒度分布集中于40~60 mm,该区段粒度占比为56.82%。无烟煤配入粒度小于3.0 mm时均可满足高炉运行要求。实验证明配入粒度小于0.5 mm的无烟煤时,焦炭质量得到显著提升,从而可扩大炼焦煤种资源并实现降本增效。 The contradiction between the supply and demand of coking coal resources in China is prominent.Incorporating anthracite into the coking process proves to be an effective approach for reducing production costs and expanding the utilization of coal resources.The study on the influence of anthracite particle size on coke quality can provide guidance for the technical application of anthracite in coking coal blending.By focusing on the typical 1/3 coking coal and anthracite with varying particle sizes,combined with analysis of coal quality characteristics,coking experiments were conducted using a 40 kg small coke oven.It was observed that adding anthracite can decrease the ash content,increase fixed carbon content,and enhance calorific value in coke production.Additionally,as the particle size of anthracite decreases,there is an increase in coke lumpiness with a flat surface and evenly distributed pores.When the particle size of anthracite exceeds 3 mm,coke becomes brittle and visible particles of anthracite are evident.Furthermore,increasing the particle size of anthracite leads to decreased coke strength,when anthracite particles is smaller than 0.5 mm in size,CSR of coke reaches 70.1%while M 40 index achieves 88.4%.Moreover,when anthracite coal is added with a particle size less than 0.5 mm,the average particle size of coke is 52.0 mm,its particle size distribution is concentrated in 40-60 mm,the granularity of this section accounts for 56.82%.When the size of anthracite is less than 3.0 mm,it can meet the operation requirements of blast furnace.The experiments demonstrate that incorporating fine-sized(<0.5 mm)anthracites can significantly improve coke quality,this can expand coking coal resources and achieve cost reduction and efficiency improvement.

作者朱汝斌曹强 ZHU Rubin;CAO Qiang(The Coal Coking Mengxi Company Quality Control Center of National Energy Group,Wuhai 016030,China;China Coal Research Institute Corporation Ltd.,Beijing 100013,China;National Energy Technology&Equipment Laboratory of Coal Utilization and Emission Control,Beijing 100013,China)

机构地区国家能源集团煤焦化蒙西公司质计中心煤炭科学技术研究院有限公司国家能源煤炭高效利用与节能减排技术装备重点实验室

出处《煤质技术》 2024年第1期61-67,共7页 Coal Quality Technology

基金煤科院科技发展基金资助项目(2021CX-Ι-01)。