【摘要】：浮選技術(shù)經(jīng)過百余年的發(fā)展,一直是選礦工藝中的重要工藝之一。浮選機(jī)是浮選工藝的核心設(shè)備,攪拌機(jī)構(gòu)又是浮選機(jī)的核心部件,機(jī)械攪拌式浮選機(jī)的攪拌機(jī)構(gòu)主要由葉輪,定子,轉(zhuǎn)子等組成,噴射式浮選機(jī)的攪拌機(jī)構(gòu)主要由射流裝置噴射射流沖擊假底攪拌。結(jié)合噴射式浮選機(jī)和機(jī)械攪拌式浮選機(jī)的優(yōu)點(diǎn),以及沖擊式水輪機(jī)的工作原理,提出一種新型的噴射攪拌浮選裝置構(gòu)想,即利用有壓噴射射流沖擊葉輪旋轉(zhuǎn)攪拌。 通過理論分析,實(shí)驗(yàn)室模型試驗(yàn)等技術(shù),利用流體動(dòng)力學(xué)、射流力學(xué),沖擊式水輪機(jī)和浮選機(jī)基礎(chǔ)知識(shí)完成各項(xiàng)研究。通過流體動(dòng)力學(xué)、射流力學(xué)分析噴射攪拌浮選裝置實(shí)驗(yàn)室模型的結(jié)構(gòu)參數(shù)及工藝參數(shù)與裝置內(nèi)能量損失之間的關(guān)系；建立噴射攪拌浮選裝置實(shí)驗(yàn)室模型測(cè)試系統(tǒng),分別在空氣中和水中進(jìn)行試驗(yàn)研究,分析噴射攪拌浮選裝置的入料壓力、入料流量、噴射射流沖擊方向與葉輪機(jī)構(gòu)所在水平面的夾角以及射流沖擊節(jié)圓相切半徑與葉輪旋轉(zhuǎn)時(shí)的轉(zhuǎn)速和扭矩之間的規(guī)律關(guān)系；分析噴射攪拌浮選裝置的入料壓力、入料流量、噴射射流沖擊方向與葉輪機(jī)構(gòu)所在水平面的夾角、射流沖擊節(jié)圓相切半徑、噴射射流的初始速度、射流打擊力、葉輪旋轉(zhuǎn)時(shí)的轉(zhuǎn)速和扭矩等結(jié)構(gòu)參數(shù)與工藝參數(shù)與裝置內(nèi)的能量損失之間的規(guī)律關(guān)系。 本文主要對(duì)噴射攪拌浮選裝置能量損失情況進(jìn)行全面的研究,得到的結(jié)論如下：分析了噴射攪拌浮選裝置能量損失是由噴嘴及進(jìn)料管部分的能量損失、射流沖擊靶距部分的能量損失與葉輪旋轉(zhuǎn)時(shí)的能量損失三部分組成；通過噴射攪拌浮選裝置實(shí)驗(yàn)室模型進(jìn)行試驗(yàn),獲得了大量的噴射攪拌浮選裝置結(jié)構(gòu)參數(shù)及工藝參數(shù)結(jié)果,并認(rèn)真分析了相關(guān)重要參數(shù)之間的規(guī)律關(guān)系；結(jié)合理論分析及試驗(yàn)數(shù)據(jù)對(duì)噴射攪拌浮選裝置能量損失與相關(guān)重要參數(shù)之間的規(guī)律關(guān)系進(jìn)行了詳細(xì)的分析,并得出噴射攪拌浮選裝置能量損失組成情況。
[Abstract]:Flotation technology has been one of the most important processes in mineral processing after more than 100 years of development. Flotation machine is the core equipment of flotation process, mixing mechanism is the core component of flotation machine. The mixing mechanism of mechanical agitating flotation machine is mainly composed of impeller, stator, rotor, etc. The mixing mechanism of the jet flotation machine is mainly jet impinging on the false bottom. Combined with the advantages of jet flotation machine and mechanical stirring flotation machine, and the working principle of impact turbine, a new concept of jet agitation flotation device is proposed, that is, the impinging impeller rotating stirring by pressure jet. The basic knowledge of hydrodynamics, jet mechanics, impingement turbine and flotation machine is used to complete the research by means of theoretical analysis, laboratory model test and so on. By means of hydrodynamics and jet mechanics, the relationship between the structural parameters and the technological parameters of the laboratory model of the jet agitation flotation unit and the energy loss in the device is analyzed. The laboratory model test system of jet agitation flotation unit was established, and the experimental study was carried out in air and water, respectively, and the feeding pressure and feed flow rate of jet agitation flotation unit were analyzed. The relationship between jet impinging direction and the horizontal plane of impeller mechanism, the tangent radius of jet impinging nodal circle and the rotating speed and torque of impeller; The pressure, flow rate, the angle between jet impact direction and the horizontal plane of impeller mechanism, the tangent radius of jet impinging nodal circle, the initial velocity of jet and the impact force of jet are analyzed. The relationship between the rotational speed and torque of the impeller and the process parameters and the energy loss in the device. In this paper, the energy loss of jet agitation flotation unit is studied comprehensively. The conclusions are as follows: the energy loss of jet agitation flotation unit is caused by the energy loss of nozzle and feed tube. The energy loss of jet impingement on the target distance is composed of three parts: the energy loss of impeller rotation. A large number of structural parameters and technological parameters of jet agitation flotation unit were obtained by laboratory model test of jet agitation flotation unit, and the regular relationship between relevant important parameters was analyzed. Based on the theoretical analysis and experimental data, the relationship between the energy loss of jet agitation flotation unit and related important parameters is analyzed in detail, and the composition of energy loss of jet agitation flotation unit is obtained.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD456

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