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選(xuan)購***振動的(de)注意事(shi)項
發布:12&dNaJsmW1瀏覽:1078次
篩(shai)分(fen)過程的(de)(de)技術經濟指標(biao)是篩(shai)分(fen)效率(lv)和生產率(lv)。前者為(wei)質量指標(biao),后者為(wei)數(shu)量指標(biao)。它們之間有一定的(de)(de)關系(xi),同(tong)時還與(yu)其他(ta)許多因素有關,這些(xie)因素決定篩(shai)分(fen)的(de)(de)結果。
在(zai)購買(mai)振動篩之前我(wo)們***先要(yao)知道什(shen)么會影響(xiang)篩分(fen)過(guo)程?影響(xiang)篩分(fen)過(guo)程的(de)因素大體可以(yi)分(fen)三類:
一(yi)(yi)、被篩(shai)(shai)(shai)(shai)分物(wu)(wu)料(liao)的(de)(de)物(wu)(wu)理性質:包括物(wu)(wu)料(liao)本身(shen)的(de)(de)粒度組(zu)成、濕度、含(han)泥量(liang)和粒子(zi)的(de)(de)形狀等。當(dang)物(wu)(wu)料(liao)細粒含(han)量(liang)較大(da)(da)(da)時(shi),篩(shai)(shai)(shai)(shai)分機(ji)的(de)(de)生產率(lv)也(ye)大(da)(da)(da)。當(dang)物(wu)(wu)料(liao)的(de)(de)濕度較大(da)(da)(da)時(shi),一(yi)(yi)般來說篩(shai)(shai)(shai)(shai)分效率(lv)都(dou)會降低。但篩(shai)(shai)(shai)(shai)孔(kong)尺寸愈(yu)大(da)(da)(da),水(shui)分影(ying)響愈(yu)小,所以對于含(han)水(shui)分較大(da)(da)(da)的(de)(de)濕物(wu)(wu)料(liao),為(wei)了改善篩(shai)(shai)(shai)(shai)分過程(cheng),一(yi)(yi)般可以采(cai)(cai)用加大(da)(da)(da)篩(shai)(shai)(shai)(shai)孔(kong)的(de)(de)辦法,或(huo)者采(cai)(cai)用濕式(shi)(shi)篩(shai)(shai)(shai)(shai)分。物(wu)(wu)料(liao)含(han)泥量(liang)大(da)(da)(da)(當(dang)含(han)泥量(liang)大(da)(da)(da)于8%時(shi))應當(dang)采(cai)(cai)用濕式(shi)(shi)篩(shai)(shai)(shai)(shai)分,或(huo)預先(xian)洗礦(kuang)。
二(er)、篩面性質及其結構參(can)數的(de)影響(xiang):
振動(dong)篩(shai)(shai)是使(shi)粒(li)子和(he)篩(shai)(shai)面(mian)作垂直(zhi)運動(dong),所以篩(shai)(shai)分(fen)(fen)(fen)效(xiao)(xiao)(xiao)率(lv)(lv)(lv)(lv)(lv)高(gao),生產(chan)能(neng)力大(da)(da)。而(er)(er)粒(li)子與篩(shai)(shai)面(mian)相對(dui)運動(dong)主要是平行運動(dong)的(de)棒條篩(shai)(shai)、平面(mian)振動(dong)篩(shai)(shai)、筒篩(shai)(shai)等,其篩(shai)(shai)分(fen)(fen)(fen)效(xiao)(xiao)(xiao)率(lv)(lv)(lv)(lv)(lv)和(he)生產(chan)能(neng)力都低(di)。對(dui)于(yu)一定的(de)物料而(er)(er)言(yan),篩(shai)(shai)分(fen)(fen)(fen)機的(de)生產(chan)率(lv)(lv)(lv)(lv)(lv)和(he)篩(shai)(shai)分(fen)(fen)(fen)效(xiao)(xiao)(xiao)率(lv)(lv)(lv)(lv)(lv)決(jue)(jue)定于(yu)篩(shai)(shai)孔(kong)尺(chi)寸。生產(chan)率(lv)(lv)(lv)(lv)(lv)取(qu)決(jue)(jue)于(yu)篩(shai)(shai)面(mian)寬(kuan)度,篩(shai)(shai)面(mian)寬(kuan)生產(chan)率(lv)(lv)(lv)(lv)(lv)高(gao)。篩(shai)(shai)分(fen)(fen)(fen)效(xiao)(xiao)(xiao)率(lv)(lv)(lv)(lv)(lv)取(qu)決(jue)(jue)于(yu)篩(shai)(shai)面(mian)長度,篩(shai)(shai)面(mian)長篩(shai)(shai)分(fen)(fen)(fen)效(xiao)(xiao)(xiao)率(lv)(lv)(lv)(lv)(lv)高(gao)。一般長寬(kuan)比為2。有效(xiao)(xiao)(xiao)的(de)篩(shai)(shai)分(fen)(fen)(fen)面(mian)積(即篩(shai)(shai)孔(kong)面(mian)積與整個篩(shai)(shai)面(mian)面(mian)積之比)愈(yu)大(da)(da),則篩(shai)(shai)面(mian)的(de)單位面(mian)積生產(chan)率(lv)(lv)(lv)(lv)(lv)和(he)篩(shai)(shai)分(fen)(fen)(fen)效(xiao)(xiao)(xiao)率(lv)(lv)(lv)(lv)(lv)愈(yu)高(gao)。篩(shai)(shai)孔(kong)尺(chi)寸愈(yu)大(da)(da),則單位篩(shai)(shai)面(mian)的(de)生產(chan)率(lv)(lv)(lv)(lv)(lv)越大(da)(da),篩(shai)(shai)分(fen)(fen)(fen)效(xiao)(xiao)(xiao)率(lv)(lv)(lv)(lv)(lv)越高(gao)。
三(san)、生產(chan)條件的影響:當篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)機(ji)(ji)的負荷較大(da)時,篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)效率(lv)低。在(zai)(zai)(zai)很大(da)程(cheng)(cheng)度上(shang)篩(shai)(shai)(shai)(shai)(shai)子的和(he)(he)平率(lv)取決于(yu)篩(shai)(shai)(shai)(shai)(shai)孔(kong)大(da)小和(he)(he)總(zong)篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)效率(lv);篩(shai)(shai)(shai)(shai)(shai)孔(kong)愈(yu)(yu)大(da),要(yao)求篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)效率(lv)愈(yu)(yu)低時,則生產(chan)率(lv)愈(yu)(yu)高(gao)。給(gei)料均(jun)勻性對(dui)篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)過程(cheng)(cheng)意義(yi)很大(da)。篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)機(ji)(ji)的傾角要(yao)適宜,一(yi)般通過試驗來確定。再就是(shi)振(zhen)動(dong)(dong)篩(shai)(shai)(shai)(shai)(shai)的振(zhen)幅(fu)與(yu)振(zhen)次,這與(yu)振(zhen)動(dong)(dong)篩(shai)(shai)(shai)(shai)(shai)的結構物性有(you)關,在(zai)(zai)(zai)一(yi)定的范圍內,增(zeng)加振(zhen)動(dong)(dong)可以提(ti)高(gao)篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)指標。我(wo)(wo)們(men)在(zai)(zai)(zai)購買(mai)振(zhen)動(dong)(dong)篩(shai)(shai)(shai)(shai)(shai)或者篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)機(ji)(ji)的時候,以上(shang)三(san)點應該著重考慮,只(zhi)有(you)考慮好了以上(shang)影響篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)的重要(yao)因素(su),我(wo)(wo)們(men)才能(neng)買(mai)到滿足我(wo)(wo)們(men)生產(chan)效率(lv)的*經濟的篩(shai)(shai)(shai)(shai)(shai)分(fen)(fen)機(ji)(ji)。