两级能量输入对提高高灰分煤泥浮选工艺的影响

IF 1.5 4区 工程技术 Q2 Earth and Planetary Sciences
Xing Wang, Youli Han, Jinbo Zhu, Lingyun Liu, Hongyang Wang, Zhiyong Lin, Shuwei Xia, Po Wang
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引用次数: 0

摘要

为了解决连续浮选过程中煤泥性质非线性变化与能量输入不匹配的问题,我们采用了两级能量输入的方法,以促进精煤的高效回收,实现效益最大化。结果表明,浮选速率常数随搅拌速度的增加而增加,在单一能量输入条件下,当搅拌速度增加到1200 r/min时,浮选速率常数达到最大值0.0271 s-1,可燃物最高回收率为74.35%。然而,40 秒内的短期浮选结果表明,可燃物回收率随搅拌速度的增加而增加,在 1500 r/min 时达到最大值 50.19%。在快速浮选期,搅拌速度设定为 1800 r/min;在强化分离期,搅拌速度设定为 2400 r/min,可燃物回收率最高可达 89.21%。此外,还优化了捕收剂的吸附密度,超过了单级能量输入下的吸附密度。浮选过程可通过两级能量输入进行优化。在最初的快速选择阶段,通过低速搅拌,粗煤颗粒优先上浮。在高速剪切力的作用下,细煤颗粒在强化分离期得到进一步分离。两级能量输入可显著提高煤泥整体浮选的可燃物回收率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of two-stage energy input on enhancing the flotation process of high-ash coal slime
To solve the mismatch problems of nonlinear changes of coal slurry properties and energy input during the continuous flotation process, we used a two-stage energy input method to promote the efficient recovery of clean coal and achieve maximized benefits. Results showed that the flotation rate constant increased with the increase in stirring speed and reached its maximum value of 0.0271 s-1 when the stirring speed increased to 1200 r/min under a single energy input, with a maximum combustible recovery of 74.35%. However, the short-term flotation results within 40 s showed that the combustible recovery increased with stirring speed and reached its maximum value of 50.19% at 1500 r/min. The stirring speed was set at 1800 r/min for a fast flotation period and 2400 r/min for an enhanced separation period, which could achieve a maximum combustible recovery of 89.21%. Furthermore, the adsorption density of the collector was optimized, exceeding that achieved under single-stage energy input. The flotation process could be optimized by two-stage energy input. Coarse coal particles were preferentially floated by low-speed stirring in the initial fast selection period. Fine coal particles were further separated during the enhanced separation period under the action of high-speed shear. Two-stage energy input could significantly improve the combustible recovery of the overall flotation of coal slime.
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来源期刊
Physicochemical Problems of Mineral Processing
Physicochemical Problems of Mineral Processing 工程技术-矿业与矿物加工
CiteScore
2.20
自引率
6.70%
发文量
99
审稿时长
3.3 months
期刊介绍: Physicochemical Problems of Mineral Processing is an international, open access journal which covers theoretical approaches and their practical applications in all aspects of mineral processing and extractive metallurgy. Criteria for publication in the Physicochemical Problems of Mineral Processing journal are novelty, quality and current interest. Manuscripts which only make routine use of minor extensions to well established methodologies are not appropriate for the journal. Topics of interest Analytical techniques and applied mineralogy Computer applications Comminution, classification and sorting Froth flotation Solid-liquid separation Gravity concentration Magnetic and electric separation Hydro and biohydrometallurgy Extractive metallurgy Recycling and mineral wastes Environmental aspects of mineral processing and other mineral processing related subjects.
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