夜涩视频

　　篩(shai)(shai)(shai)(shai)分(fen)(fen)(fen)(fen)(fen)過(guo)程的技術(shu)經濟指(zhi)標是篩(shai)(shai)(shai)(shai)分(fen)(fen)(fen)(fen)(fen)效率(lv)和生產(chan)率(lv)，前(qian)者為質(zhi)量(liang)指(zhi)標，后者為數量(liang)指(zhi)標。它們(men)之間有(you)一定的關(guan)系，同(tong)時還與其(qi)他許(xu)多(duo)因(yin)(yin)(yin)素有(you)關(guan)，這些因(yin)(yin)(yin)素決定篩(shai)(shai)(shai)(shai)分(fen)(fen)(fen)(fen)(fen)的結(jie)果(guo)。影響(xiang)篩(shai)(shai)(shai)(shai)分(fen)(fen)(fen)(fen)(fen)過(guo)程的因(yin)(yin)(yin)素大(da)(da)(da)體可(ke)以(yi)分(fen)(fen)(fen)(fen)(fen)三(san)類：包括(kuo)物料(liao)本身(shen)的粒度組成、濕(shi)(shi)度、含(han)泥量(liang)和粒子(zi)的形狀等。當(dang)(dang)物料(liao)細粒含(han)量(liang)較大(da)(da)(da)時，篩(shai)(shai)(shai)(shai)子(zi)的生產(chan)率(lv)也(ye)大(da)(da)(da)。當(dang)(dang)物料(liao)的濕(shi)(shi)度較大(da)(da)(da)時，一般(ban)(ban)來說篩(shai)(shai)(shai)(shai)分(fen)(fen)(fen)(fen)(fen)效率(lv)都會降低。但篩(shai)(shai)(shai)(shai)孔尺(chi)寸愈(yu)大(da)(da)(da)，水(shui)(shui)分(fen)(fen)(fen)(fen)(fen)影響(xiang)愈(yu)小(xiao)，所以(yi)對于含(han)水(shui)(shui)分(fen)(fen)(fen)(fen)(fen)較大(da)(da)(da)的濕(shi)(shi)物料(liao)，為了改善(shan)篩(shai)(shai)(shai)(shai)分(fen)(fen)(fen)(fen)(fen)過(guo)程，一般(ban)(ban)可(ke)以(yi)采(cai)用加大(da)(da)(da)篩(shai)(shai)(shai)(shai)孔的辦法，或(huo)者采(cai)用濕(shi)(shi)式篩(shai)(shai)(shai)(shai)分(fen)(fen)(fen)(fen)(fen)。物料(liao)含(han)泥量(liang)大(da)(da)(da)（當(dang)(dang)含(han)泥量(liang)大(da)(da)(da)于8%時）應當(dang)(dang)采(cai)用濕(shi)(shi)式篩(shai)(shai)(shai)(shai)分(fen)(fen)(fen)(fen)(fen)，或(huo)預先洗(xi)礦。

　　篩面結構參數的影響

　　直線篩(shai)(shai)(shai)(shai)是使粒子和篩(shai)(shai)(shai)(shai)面(mian)(mian)(mian)作垂(chui)直運動(dong)，所(suo)以篩(shai)(shai)(shai)(shai)分(fen)效(xiao)率(lv)高，生(sheng)(sheng)產(chan)(chan)能力大。而粒子與篩(shai)(shai)(shai)(shai)面(mian)(mian)(mian)相對運動(dong)主要是平行運動(dong)的(de)棒條(tiao)篩(shai)(shai)(shai)(shai)、平面(mian)(mian)(mian)振動(dong)篩(shai)(shai)(shai)(shai)、筒(tong)篩(shai)(shai)(shai)(shai)等，其(qi)篩(shai)(shai)(shai)(shai)分(fen)效(xiao)率(lv)和生(sheng)(sheng)產(chan)(chan)能力都低。對于(yu)(yu)一(yi)定(ding)的(de)物料而言，篩(shai)(shai)(shai)(shai)子的(de)生(sheng)(sheng)產(chan)(chan)率(lv)和篩(shai)(shai)(shai)(shai)分(fen)效(xiao)率(lv)決定(ding)于(yu)(yu)篩(shai)(shai)(shai)(shai)孔尺寸。生(sheng)(sheng)產(chan)(chan)率(lv)取決于(yu)(yu)篩(shai)(shai)(shai)(shai)面(mian)(mian)(mian)寬(kuan)度(du)，篩(shai)(shai)(shai)(shai)面(mian)(mian)(mian)寬(kuan)生(sheng)(sheng)產(chan)(chan)率(lv)高。篩(shai)(shai)(shai)(shai)分(fen)效(xiao)率(lv)取決于(yu)(yu)篩(shai)(shai)(shai)(shai)面(mian)(mian)(mian)長度(du)，篩(shai)(shai)(shai)(shai)面(mian)(mian)(mian)長篩(shai)(shai)(shai)(shai)分(fen)效(xiao)率(lv)高。一(yi)般長寬(kuan)比為2。有效(xiao)的(de)篩(shai)(shai)(shai)(shai)子面(mian)(mian)(mian)積(ji)（即篩(shai)(shai)(shai)(shai)孔面(mian)(mian)(mian)積(ji)與整個篩(shai)(shai)(shai)(shai)面(mian)(mian)(mian)面(mian)(mian)(mian)積(ji)之比）愈大，則篩(shai)(shai)(shai)(shai)面(mian)(mian)(mian)的(de)單(dan)位面(mian)(mian)(mian)積(ji)生(sheng)(sheng)產(chan)(chan)率(lv)和篩(shai)(shai)(shai)(shai)分(fen)效(xiao)率(lv)愈高。篩(shai)(shai)(shai)(shai)孔尺寸愈大，則單(dan)位篩(shai)(shai)(shai)(shai)面(mian)(mian)(mian)的(de)生(sheng)(sheng)產(chan)(chan)率(lv)越(yue)大，篩(shai)(shai)(shai)(shai)分(fen)效(xiao)率(lv)越(yue)高。

　　生產條件的影響

　　當篩(shai)(shai)(shai)(shai)子(zi)的(de)負荷較(jiao)大時，篩(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)低(di)。在很大程度上圓振(zhen)動篩(shai)(shai)(shai)(shai)篩(shai)(shai)(shai)(shai)子(zi)的(de)和平率(lv)(lv)取決于篩(shai)(shai)(shai)(shai)孔大小(xiao)和總(zong)篩(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)；篩(shai)(shai)(shai)(shai)孔愈(yu)大，要求篩(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)愈(yu)低(di)時，則生產率(lv)(lv)愈(yu)高。給料均勻性(xing)對(dui)篩(shai)(shai)(shai)(shai)分(fen)過程意義(yi)很大。篩(shai)(shai)(shai)(shai)子(zi)的(de)傾角要適宜，一般通過試驗來確定。再就是篩(shai)(shai)(shai)(shai)子(zi)的(de)振(zhen)幅與振(zhen)次，這(zhe)與篩(shai)(shai)(shai)(shai)子(zi)的(de)結構物性(xing)有(you)關(guan)，在一定的(de)范(fan)圍內，增加(jia)振(zhen)動可(ke)以提高篩(shai)(shai)(shai)(shai)分(fen)指標。

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