基于煤岩显微组分分选与重构的海石湾矿煤黏结特性研究  

Study on improvement of caking property of the coal of Haishiwan Mine by reconstituting maceral components through coal preparation

作　　者：刘胜[1] LIU Sheng(CCTEG Beijing Huayu Engineering Co.Ltd.,Xi'an 710075,China)

机构地区：[1]中煤科工集团北京华宇工程有限公司,陕西西安710075

出　　处：《选煤技术》2024年第2期29-33,共5页Coal Preparation Technology

摘　　要：为提升海石湾矿煤的利用价值,基于工业分析、元素分析以及煤岩显微组分的检测结果,通过高密度脱灰、按密度分选和煤岩显微组分重构等方法,研究了煤岩显微组分的分选方式与重构煤的黏结特性。结果表明:海石湾矿煤品质优良,但其中情质组含量较高是限制其应用范围和高价值利用的主要因素;将原煤煤样的粒度破碎至6mm以下,可使煤与杂质解离充分,当分选密度为1.6g/cm²时,精煤理论产率为85.50%,理论灰分为5.09%,可选性等级为易选;以1.6g/cm²为分选密度对破碎后(<6mm)原煤进行脱灰处理,并将脱灰后轻产物磨细至0.125mm,按密度1.28g/cm²进行分选,可得到产率为42.00%、镜质组含量为85.92%的浮物;煤岩显微组分重构后,当其中镜质组含量大于75%时,重构煤的黏结性有了明显提高,达到了气煤标准,可有效提升产品的利用价值。研究结果不仅可推动海石湾矿煤基于显微组分的分质利用,也对“双碳”背景下煤炭清洁高效利用具有重要意义。With an aim to enhancing utilization value of the coal of Haishiwan Mine,a study is made on im-provement of the caking property of the coal based on results of proximate,ultimate and petrograhpic analysis of the coal,and through separation of the coal at both higher and lower separation densities for ash reduction and reconstitution of macerals.Study results show that Haishiwan coal is of good quality,yet it has a high content of inertinite,a major factor restricting it scope and value of utilization;when the coal is crushed down to a size of minus 6 mm,the impurities in coal can be thoroughly liberated;after ash reduction of the coal at a separation density of 1.6 g/cm',the theoretical yield and ash of the separated floats are 85.05%and 5.09%,respectively,in-dicating it is an easy-to-wash coal;after rewashing of the float material at a separation density of 1.28 g/cm?after being ground down to a size of 0.125 mm,the cleaned product with a yield of 42.00%and a content of vit-rinite as high as 85.92%can be obtained;and when the content of vitrinite in Haishiwan coal is greater than 75%after reconstitution of macerals,the coal exhibits a notably improved caking property with a quality up to the standard of gas coal,effectively enhancing it utilization value.The work made in the paper not only promotes the utilization of macerals in Haishiwan coal by quality,but also contributes significantly to clean and high-efficiency utilization of coal against the backdrop of achieving the carbon peaking and neutrality goals.

关 键 词：煤岩显微组分 双密度分选 组分重构 黏结指数 分质利用 

分 类 号：TD942[矿业工程—选矿] TQ53[化学工程—煤化学工程]