煤炭工程 ›› 2023, Vol. 55 ›› Issue (10): 80-84.doi: 10.11799/ce202310014

• 生产技术 • 上一篇    下一篇

哈尔乌素选煤厂块煤防破碎技术研究

刘利波,徐宏祥,崔家画   

  1. 1. 国能准能集团有限责任公司,内蒙古 鄂尔多斯 010300
    2. 中国矿业大学(北京)化学与环境工程学院,北京 100083

  • 收稿日期:2022-12-12 修回日期:2023-02-09 出版日期:2023-10-20 发布日期:2025-04-08
  • 通讯作者: 徐宏祥 E-mail:xuhongxiang001@163.com

Anti-fragmentation technology of lump coal in Harwusu Coal Preparation Plant#br#

  • Received:2022-12-12 Revised:2023-02-09 Online:2023-10-20 Published:2025-04-08

摘要:

针对哈尔乌素选煤厂块煤在转载环节破碎严重的问题, 分析了脱介筛筛上和车厢样品的块煤限下率特性, 并开展了块煤跌落试验, 研究跌落高度对块煤限下率的影响规律。基于力学分析建立了块煤防破碎数学模型, 提出了块煤防破碎的技术方案, 并开展了精煤脱介筛筛前溜槽和带式输送机机头溜槽防破碎改造。改造后, 车厢块煤产品25mm限下率平均为20.31%, 较技术应用前下降16.23百分点, 块煤销售价格可提高15元/t。

关键词: 块煤转载, 防破碎模型, 限下率, 溜槽

Abstract:

In response to the problem of serious breakage of lump coal in the retransmission link of Harwusu coal processing plant, the characteristics of lump coal undersize fraction on the screen and carriage samples of the removal media screen were analyzed, and the drop test of lump coal was carried out to study the influence law of drop height on the undersize fraction of lump coal. Based on the mechanical analysis, a block coal anti-fragmentation mathematical model was established, and a technical solution for block coal anti-fragmentation was proposed, and the anti-fragmentation technology modification of fine coal removal media screen pre-screen chute and tape conveyor head chute was carried out. After the anti-fragmentation technology modification, the 25mm limit rate of lump coal products in the carriage was 20.31% on average, which was 16.23 percentage points lower than that before the technology application, and the sales price of tons of lump coal was increased by RMB 15 yuan /ton, which increased the economic benefit of the enterprise.

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