本文選題：重介旋流器　切入點：分選密度　出處：《太原理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：為了優(yōu)化磁場調(diào)控重介旋流器分選密度的方法,本論文利用導(dǎo)磁結(jié)構(gòu)施加于重介旋流器外部線圈上,進行磁場作用下導(dǎo)磁結(jié)構(gòu)對重介旋流器分選效果的影響研究。研究了導(dǎo)磁結(jié)構(gòu)布置于線圈上部和下部作用于重介旋流器不同位置時的介質(zhì)分配規(guī)律。施加導(dǎo)磁結(jié)構(gòu)后,較無導(dǎo)磁結(jié)構(gòu),溢流密度和底流密度變化趨勢不變,變化幅度改變。進行了導(dǎo)磁結(jié)構(gòu)作用于重介旋流器柱錐面、柱錐面下40mm、80mm、120mm和160mm處的粗煤泥分選試驗,研究了不同電流強度時導(dǎo)磁結(jié)構(gòu)作用于旋流器不同位置對其分選效果的影響規(guī)律。研究表明:上導(dǎo)磁結(jié)構(gòu)作用于柱錐面和柱錐面下40mm處,電流5.0A時,能夠進一步提高旋流器的分選密度。上導(dǎo)磁結(jié)構(gòu)作用于柱錐面下160mm處,電流5A可以降低精、尾煤灰分,電流20、25、30A情況下,精、尾煤灰分又升高。設(shè)計了不同插入深度的導(dǎo)磁結(jié)構(gòu)分別施加于線圈上部,進行導(dǎo)磁結(jié)構(gòu)作用旋流器柱錐面時的介質(zhì)分配試驗,研究了不同插入深度導(dǎo)磁結(jié)構(gòu)作用于旋流器柱錐面時的底、溢流介質(zhì)密度變化趨勢,較無導(dǎo)磁結(jié)構(gòu),其變化趨勢不變,變化幅度改變。進行了不同插入深度導(dǎo)磁結(jié)構(gòu)作用于旋流器柱錐面時粗煤泥分選試驗,研究了不同插入深度導(dǎo)磁結(jié)構(gòu)作用于旋流器柱錐面對提高其分選密度的影響規(guī)律。研究表明:當(dāng)在旋流器柱錐面施加不同插入深度的上導(dǎo)磁結(jié)構(gòu)時,電流5.0A條件下,精、尾煤灰分能夠進一步升高,提高旋流器的分選密度。導(dǎo)磁結(jié)構(gòu)插入深度為20mm時,精、尾煤灰分同時升到最大,提高了旋流器的分選密度。借助ANSYS軟件的電磁場分析功能,進行了導(dǎo)磁結(jié)構(gòu)對線圈磁場分布的影響模擬研究。我們可以知道:導(dǎo)磁結(jié)構(gòu)對磁場有阻斷的作用,這種阻斷作用可以讓磁感線不發(fā)散出去,磁感線集中之后可以在特定區(qū)域內(nèi)產(chǎn)生更大的磁場力,這樣就會對旋流器內(nèi)重介質(zhì)的運動產(chǎn)生影響,宏觀上表現(xiàn)為分選密度的變化。但隨著導(dǎo)磁結(jié)構(gòu)插入深度的增加,線圈中因?qū)Т沤Y(jié)構(gòu)的屏蔽作用,磁場作用范圍變小。導(dǎo)磁結(jié)構(gòu)插入深度20mm時,對旋流器分選密度的提高作用最明顯。
[Abstract]:In order to optimize the method of adjusting the separation density of heavy medium cyclone by magnetic field, the magnetic conductivity structure is applied to the external coil of the double medium cyclone in this paper. The effect of magnetic conductivity structure on the separation effect of heavy dielectric cyclone is studied. The distribution law of medium is studied when the magnetic conduction structure is arranged in the upper part of the coil and the lower part of the coil acts on the different position of the double medium cyclone. Compared with no magnetic conductivity structure, the variation trend of overflow density and bottom current density is constant, and the amplitude of change is changed. The separation tests of coarse coal slime with magnetic conductivity structure on the cone surface of the heavy dielectric cyclone column, 40 mm below the cone surface of the column and 160mm are carried out. The influence of magnetic conductivity structure on the separation efficiency of hydrocyclone with different current intensity is studied. The results show that the upper magnetic conduction structure acts on the cone surface of the column and the 40mm under the cone surface of the column, and the current is 5.0A. Can further improve the separation density of the cyclone. The upper magnetic conduction structure acts on the 160mm under the cone of the column. The current 5A can reduce the content of the fine coal ash, and the current is 2025 ~ 30A. The magnetic conduction structure with different insertion depth was applied to the upper part of the coil, and the dielectric distribution test was carried out when the magnetic conduction structure acted on the cone of the cyclone column. The variation trend of overflow medium density is studied when the magnetic conductivity structure of different insertion depth acts on the cone surface of the hydrocyclone column, but the change trend of the overflow medium density is invariant than that of no magnetic conductivity structure. The separation test of coarse coal slime was carried out when the magnetic conductivity structure of different insertion depth acted on the cone surface of the cyclone column. The effect of different insertion depth magnetic conduction structure on the separation density of the hydrocyclone column cone is studied. The results show that when the upper magnetic conductivity structure with different insertion depth is applied on the cone surface of the cyclone column, the current is 5.0A. When the insertion depth of magnetic conduction structure is 20mm, the final and tail coal ash content rises to the maximum at the same time, which increases the separation density of cyclone. With the help of electromagnetic field analysis function of ANSYS software, the separation density of cyclone can be increased further. The effect of magnetic conduction structure on the magnetic field distribution of the coil is simulated. We can know that the magnetic field is blocked by the magnetic conduction structure, which can keep the magnetic inductance line from dispersing. After the magnetic inductance line concentration, the magnetic field force can be produced in a specific region, which will have an effect on the motion of the heavy medium in the hydrocyclone, showing the change of the separation density macroscopically, but with the increase of the insertion depth of the magnetic conductivity structure, Because of the shielding effect of the magnetic conduction structure in the coil, the magnetic field action range becomes smaller. When the magnetic conductivity structure is inserted into the depth 20mm, the effect of increasing the separation density of the hydrocyclone is most obvious.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD94;TD45

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