本文選題：有壓重介旋流器 + 次生煤泥量�。� 參考：《安徽理工大學(xué)》2015年碩士論文

【摘要】：目前,重介選煤是我國主要的選煤方法,有壓重介旋流器選煤更是占有重要的市場,對有壓重介選煤的方法、原理和系統(tǒng)煤泥性質(zhì)的研究是非常有意義的。在有壓重介旋流器系統(tǒng)中,旋流器入料口物料中的煤泥含量會直接影響旋流器的工作懸浮液的密度,粘度等,進(jìn)而影響旋流器的正常工作,影響分選效果,以致影響生產(chǎn)效益。因此對有壓重介旋流器系統(tǒng)產(chǎn)生的次生煤泥量的研究具有很現(xiàn)實的意義。 本論文以淮南礦業(yè)集團潘北選煤廠的入洗原煤為樣品,對有壓兩產(chǎn)品重介旋流器系統(tǒng)的煤泥性質(zhì)進(jìn)行研究,根據(jù)實驗要求,分為4個采樣點進(jìn)行取樣,即原煤皮帶,旋流器入料泵出口,旋流器溢流、底流,合格介質(zhì)桶,分別采取入洗原煤、旋流器入料泵出口產(chǎn)品、旋流器產(chǎn)品精煤和矸石和合格介質(zhì)5個煤樣。根據(jù)國標(biāo)GB/T477-2008和GB/T478-2008分別對煤樣進(jìn)行煤炭篩分試驗、浮沉試驗、泥化試驗,計算出各個粒度級的產(chǎn)率和灰分,各個密度級的產(chǎn)率和灰分,原煤泥化時間對應(yīng)昀泥化量。通過篩分試驗數(shù)據(jù),對各個煤樣的粒度特性進(jìn)行分析；通過浮沉試驗數(shù)據(jù),畫出可選性曲線,對入洗原煤的可選性進(jìn)行分析；通過原煤泥化試驗數(shù)據(jù),畫出原煤泥化特性曲線,對原煤的泥化性質(zhì)進(jìn)行分析；根據(jù)潘北選煤廠現(xiàn)場生產(chǎn)工作參數(shù),計算出有壓重介旋流器系統(tǒng)中各個階段產(chǎn)生的次生煤泥量。 通過試驗得出,在潘北選煤廠有壓兩產(chǎn)品重介旋流器系統(tǒng)中,入洗原煤經(jīng)過有壓重介旋流器系統(tǒng)共用時44s,共能夠產(chǎn)生16.68t/h的次生煤泥量,其中原煤在混料桶中用時40s,能夠產(chǎn)生12.23t/h的次生煤泥量,經(jīng)過渣漿泵用時1s,能夠產(chǎn)生0.64t/h的次生煤泥量,從入料泵的出口至旋流器出口,用時3s,能夠產(chǎn)生3.81t/h的次生煤泥量。通過以上實驗數(shù)據(jù)比較,由旋流器入料泵產(chǎn)生的次生煤泥量相對不大,表明入洗原煤在入料泵中并沒有過多地粉碎。
[Abstract]:At present, heavy medium coal preparation is the main method of coal preparation in China, and pressurized heavy medium cyclone coal preparation is an important market. It is of great significance to study the method, principle and system of coal slime properties. In the pressure and heavy medium cyclone system, the coal slime content in the inlet material of the hydrocyclone will directly affect the density and viscosity of the working suspension of the hydrocyclone, and then affect the normal operation of the hydrocyclone, affect the separation effect, and thus affect the production efficiency. Therefore, it is of practical significance to study the secondary coal slime produced by the pressurized heavy medium cyclone system. Taking the raw coal from Panbei Coal preparation Plant of Huainan Mining Group as the sample, this paper studies the slime properties of the heavy medium cyclone system with two pressurized products. According to the experimental requirements, it is divided into 4 sampling points, that is, the raw coal belt. Cyclone feed pump outlet, cyclone overflow, bottom flow, qualified medium barrel, respectively to take washing raw coal, cyclone feed pump export products, hydrocyclone products concentrate coal and gangue and qualified medium 5 coal samples. According to GB / T 477-2008 and GB / T 478-2008, coal sieving test, floatation test and mudding test were carried out to calculate the yield and ash content of each granularity level, the yield and ash content of each density class, and the original coal sludge time. Through screening test data, the particle size characteristics of each coal sample are analyzed; the optional curve is drawn through the floating and subsidence test data to analyze the selectability of the washed raw coal; and the original coal slime characteristic curve is drawn through the original coal slime test data. Based on the working parameters of Panbei Coal preparation Plant, the secondary slime produced in each stage of the pressurized heavy medium cyclone system is calculated. The test results show that in the two-product heavy medium cyclone system of Panbei Coal preparation Plant, the secondary slime of 16.68t/h can be produced when the raw coal is washed through the pressurized and heavy medium cyclone system for 44s. When the raw coal is used in the mixing barrel for 40 s, the secondary slime of 12.23t/h can be produced, and the secondary slime of 0.64t/h can be produced by the slurry pump for 1 s, from the outlet of the feed pump to the outlet of the cyclone, and for 3 s, the secondary slime of 3.81t/h can be produced. Through the comparison of the above experimental data, the amount of secondary slime produced by the hydrocyclone feed pump is relatively small, which indicates that the raw coal is not crushed too much in the feed pump.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD94

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