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Coal Engineering ›› 2023, Vol. 55 ›› Issue (10): 80-84.doi: 10.11799/ce202310014

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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

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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