煤炭工程 ›› 2023, Vol. 55 ›› Issue (10): 167-173.doi: 10.11799/ce202310028

• 研究探讨 • 上一篇    下一篇

麻黄梁煤矿矸石破碎粒度与化学成分相关性研究

朱磊,古文哲,宋天奇,赵萌烨   

  1. 1. 中煤能源研究院有限责任公司,陕西 西安 710054 2. 中国矿业大学(北京)能源与矿业学院,北京 100083
  • 收稿日期:2022-12-12 修回日期:2023-02-17 出版日期:2023-10-20 发布日期:2025-04-08
  • 通讯作者: 古文哲 E-mail:guwenzhe7@163.com

Correlation analysis between crushed particle size and chemical composition of gangue in mahuangliang coal mine

  • Received:2022-12-12 Revised:2023-02-17 Online:2023-10-20 Published:2025-04-08
  • Contact: Wenzhe GU E-mail:guwenzhe7@163.com

摘要:

为研究矸石破碎后粒度差异对矸石组分分布的影响, 以麻黄梁煤矿矸石为研究对象,通过筛分、研磨、化学成分测试等手段, 研究了矸石经过颚式破碎后的粒径分布规律及不同排矿口宽度和粒度条件下主要化学成分变化情况。结果表明: 随着排矿口宽度增大, 矸石粒径分布模型中特征粒径具有对数上升趋势, 均匀性指数具有指数下降趋势。各粒径的矸石成分组成也随粒度发生变化: 随着排矿口宽度增加, 各成分的分配率受影响程度不一, 含CaO 和MgO的矸石颗粒, 在粗粒级产品中富集; 含Fe2O3的颗粒逐渐由细粒级向粗粒级集中; 含有Al2O3, SiO2, C 的颗粒更易破碎并在细粒级产品中富集。且随着矸石颗粒粒度的增大, 各成分的分配率表现为先上升再下降的规律, 富集比随粒度变化的趋势符合y=a+b×cx 形式。

关键词: 颚式破碎矸石, 粒径, 化学组分, 分配率, 富集比

Abstract:

In order to study the influence of grain size difference on the distribution of gangue components after crushing, taking gangue in mahuangliang coal mine as the research object, the grain size distribution law of gangue after crushing by means of screening, grinding, chemical composition testing and other means, and the change of main chemical composition of gangue under the condition of different width of discharge port and grain size were studied. The results show that the characteristic grain size of gangue grain size distribution model has a logarithmic increasing trend and the uniformity index has an exponential decreasing trend with the increase of the drainage port width. The composition of gangue with different grain sizes also changes with the grain size. With the increase of the width of the discharge port, the distribution rate of each component is affected to different degrees. Gangue particles containing CaO and MgO are enriched in coarse-grained products. The particles containing Fe2O3 gradually concentrated from fine to coarse. Particles containing Al2O3, SiO2 and C are more likely to be broken and enriched in fine-grained products. With the increase of gangue particle size, the distribution rate of each component shows a law of first increasing and then decreasing, and the enrichment ratio with the change of particle size conforms to the form of “”.

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