復(fù)合微泡發(fā)生器裝置的應(yīng)用研究
本文選題:尾礦處理 切入點:浮選技術(shù) 出處:《昆明理工大學(xué)》2016年碩士論文 論文類型:學(xué)位論文
【摘要】:隨著有限礦物資源的不斷開采,如何更有效地利用資源,從尾礦中選出仍有價值的礦物是人們一直在關(guān)注的問題。在尾礦處理方法中,常采用浮選法對其進行處理,但如何大量地產(chǎn)生符合浮選要求的微泡一直是浮選工藝的難題。針對礦物浮選難題,本文以浮選原理為依據(jù),設(shè)計復(fù)合微泡發(fā)生器來滿足尾礦浮選處理要求。首先介紹了浮選理論,概述了浮選法的發(fā)展歷程與產(chǎn)生微泡的各種方法,分析了微泡的形成、微泡與礦粒粘附過程、微泡直徑對礦物浮選的影響。對比了各種微泡發(fā)生器的發(fā)泡原理以及發(fā)泡性能優(yōu)劣,選用旋流式微泡發(fā)生器與射流式微泡發(fā)生器組成復(fù)合微泡發(fā)生器,分別建立了射流式微泡發(fā)生器、旋流式微泡發(fā)生器和復(fù)合微泡發(fā)生器的內(nèi)部流場模型,運用FLUENT軟件進行仿真,獲得了微泡發(fā)生器的速度云圖、壓力云圖、湍動能云圖及含氣量圖表。最后通過清水實驗及對鐵精礦尾礦的浮選實驗,驗證了復(fù)合微泡發(fā)生器的工作性能。通過建模仿真和實驗得出,射流式微泡發(fā)生器輸入端流速越大,吸氣口負壓值、噴出口含氣量越大,當(dāng)輸入端流速為15m/s,氣閥直徑為1.2mm時,對該種鐵精礦尾礦的浮選效果較好。
[Abstract]:With the continuous exploitation of limited mineral resources, how to use the resources more effectively and how to select the valuable minerals from the tailings is a problem that people have been paying close attention to all the time. In the tailings treatment, flotation is often used to treat them. However, how to produce a large number of microbubbles that meet the flotation requirements has always been a difficult problem in the flotation process. In view of the mineral flotation problem, this paper is based on the flotation principle. A composite microbubble generator was designed to meet the needs of tailings flotation. Firstly, the flotation theory was introduced, the development of flotation method and various methods of producing microbubbles were summarized, and the formation of microbubbles and the adhesion process between microbubbles and particles were analyzed. The influence of microbubble diameter on mineral flotation. The foaming principle and foaming performance of various kinds of microbubble generators are compared. A composite microbubble generator is composed of swirling microbubble generator and jet microbubble generator. The internal flow field models of jet microbubble generator, swirl microbubble generator and composite microbubble generator are established respectively. The velocity cloud diagram and pressure cloud diagram of the micro bubble generator are obtained by using FLUENT software. The turbulent kinetic energy cloud diagram and gas content chart. Finally, the working performance of the composite microbubble generator is verified by the experiments of clean water and flotation of iron concentrate tailings. Through modeling, simulation and experiment, it is found that the velocity of the jet micro bubble generator increases with the input end. When the inlet velocity is 15m / s and the valve diameter is 1.2mm, the flotation effect of the iron concentrate tailings is better.
【學(xué)位授予單位】:昆明理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:TD45
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