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    新型湍流调控矿化技术对煤泥浮选效果影响研究

    Study on influence of novel turbulence-regulated mineralization technology on flotation performance of coal slime

    • 摘要: 现有矿化工艺面临多维技术制约:传统浮选体系缺乏入料特性的适应性调节机制;逆流矿化过程存在矿化效率与回收率难以协同提升的瓶颈;而机械搅拌与射流矿化方式虽强化了相界面作用,却伴随能源消耗强度偏高及湍流场均匀性不足的固有问题。为弥补上述3种技术的不足,通过引入湍流调控颗粒,提出了一种通过调节湍流强度以适应不同入料特性的新矿化技术,重点分析湍流强度对流化床浮选矿化过程的影响。通过分析表观水速和静床层高度的变化对湍流强度的影响,进一步研究了新矿化环境对煤泥分选效果的影响。研究结果表明,新提出的矿化环境在煤泥分选中起到了决定性作用,表观水速和静床层高度的调整会显著改变湍流强度,导致不同粒度煤泥的浮选效果具存在差异。

       

      Abstract: The existing mineralization process faces multi-dimensional technical constraints: the traditional flotation system lacks an adaptive adjustment mechanism for feed characteristics, and the countercurrent mineralization process has the bottleneck of difficult to synergistically improve the mineralization efficiency and recovery; while the mechanical agitation and jet mineralization methods strengthen the phase-interfacial interaction, but they are accompanied by the inherent problems of high energy consumption intensity and insufficient turbulence field homogeneity. In order to make up for the shortcomings of these three methods, this study proposes a new mineralization technology by introducing turbulence-regulated particles, which can be adapted to the needs of different feed characteristics by adjusting the turbulence intensity, and focuses on the analysis of the effect of turbulence intensity on the mineralization process of fluidized bed flotation. The effect of the new mineralization environment on the coal slurry sorting effect was further investigated by analyzing the effect of changes in apparent water velocity and static bed height on the turbulence intensity. The results show that the newly proposed mineralization environment plays a decisive role in coal slurry sorting, and the adjustments of apparent water velocity and static bed height can significantly change the turbulence intensity, which makes the flotation effect of coal slurry of different particle sizes have differences.

       

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