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振動篩

是用(yong)于(yu)泥(ni)漿固相處理的(de)一種過濾(lv)性的(de)機(ji)械(xie)分離設備，篩(shai)(shai)網(wang)(wang)和振(zhen)(zhen)子組成。篩(shai)(shai)網(wang)(wang)的(de)粗(cu)細以目表(biao)示，一般50目以下的(de)為粗(cu)篩(shai)(shai)網(wang)(wang)，80目以上的(de)為細篩(shai)(shai)網(wang)(wang)。振(zhen)(zhen)子是一個偏心輪，在電動(dong)機(ji)帶動(dong)下旋轉，使篩(shai)(shai)架發生(sheng)振(zhen)(zhen)動(dong)。由于(yu)篩(shai)(shai)架的(de)振(zhen)(zhen)動(dong)，泥(ni)漿流到篩(shai)(shai)面上時較粗(cu)的(de)固體(ti)顆粒就(jiu)留在篩(shai)(shai)面上，并沿斜面從一端(duan)排出，較細的(de)固相顆粒和泥(ni)漿液體(ti)一起(qi)通過篩(shai)(shai)孔流到泥(ni)漿池(chi)去。

振動篩將顆(ke)(ke)粒大小(xiao)(xiao)(xiao)不(bu)同的(de)(de)(de)(de)碎散物(wu)(wu)料群,多次(ci)通過均勻布孔(kong)的(de)(de)(de)(de)單層(ceng)或多層(ceng)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)面(mian),分(fen)(fen)成(cheng)若(ruo)干(gan)不(bu)同級的(de)(de)(de)(de)過程(cheng)(cheng)(cheng)成(cheng)為篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)分(fen)(fen)。大于篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)孔(kong)的(de)(de)(de)(de)顆(ke)(ke)粒留(liu)在(zai)(zai)(zai)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)面(mian)上(shang),稱為該篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)面(mian)的(de)(de)(de)(de)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)上(shang)物(wu)(wu),小(xiao)(xiao)(xiao)于篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)孔(kong)的(de)(de)(de)(de)顆(ke)(ke)粒透(tou)過篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)孔(kong),稱為該篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)面(mian)的(de)(de)(de)(de)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)下(xia)物(wu)(wu)。實際的(de)(de)(de)(de)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)分(fen)(fen)過程(cheng)(cheng)(cheng)是(shi)：大量粒度大小(xiao)(xiao)(xiao)不(bu)同、粗細混(hun)雜(za)(za)的(de)(de)(de)(de)碎散物(wu)(wu)料進(jin)入篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)面(mian)后,只有(you)一(yi)部分(fen)(fen)顆(ke)(ke)粒與篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)面(mian)接(jie)觸,由于篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)箱的(de)(de)(de)(de)振動(dong),篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)上(shang)物(wu)(wu)料層(ceng)被松散,使大顆(ke)(ke)粒本來就(jiu)存在(zai)(zai)(zai)的(de)(de)(de)(de)間隙被進(jin)一(yi)步擴大,小(xiao)(xiao)(xiao)顆(ke)(ke)粒乘(cheng)機穿過間隙,轉(zhuan)移到下(xia)層(ceng)或運(yun)輸(shu)機上(shang)。由于小(xiao)(xiao)(xiao)顆(ke)(ke)粒間隙小(xiao)(xiao)(xiao),大顆(ke)(ke)粒并不(bu)能(neng)穿過，于是(shi)原來雜(za)(za)亂無章排(pai)列的(de)(de)(de)(de)顆(ke)(ke)粒群發生了(le)分(fen)(fen)離(li),即按顆(ke)(ke)粒大小(xiao)(xiao)(xiao)進(jin)行了(le)分(fen)(fen)層(ceng),形成(cheng)了(le)小(xiao)(xiao)(xiao)顆(ke)(ke)粒在(zai)(zai)(zai)下(xia),粗顆(ke)(ke)粒居上(shang)的(de)(de)(de)(de)排(pai)列規則。到達篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)面(mian)的(de)(de)(de)(de)細顆(ke)(ke)粒,小(xiao)(xiao)(xiao)于篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)孔(kong)者透(tou)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai),?實現了(le)粗、細粒分(fen)(fen)離(li),完成(cheng)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)分(fen)(fen)過程(cheng)(cheng)(cheng)。然(ran)而，充(chong)分(fen)(fen)的(de)(de)(de)(de)分(fen)(fen)離(li)是(shi)沒有(you)的(de)(de)(de)(de)，在(zai)(zai)(zai)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)分(fen)(fen)時，一(yi)般都(dou)有(you)一(yi)部分(fen)(fen)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)下(xia)物(wu)(wu)留(liu)在(zai)(zai)(zai)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)上(shang)物(wu)(wu)中(zhong)。細粒透(tou)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)時，雖然(ran)顆(ke)(ke)粒都(dou)小(xiao)(xiao)(xiao)于篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)孔(kong)，但它(ta)們透(tou)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)的(de)(de)(de)(de)難(nan)易程(cheng)(cheng)(cheng)度不(bu)同，物(wu)(wu)料和篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)孔(kong)尺(chi)寸相(xiang)近的(de)(de)(de)(de)顆(ke)(ke)粒，透(tou)篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)就(jiu)較難(nan)，透(tou)過篩(shai)(shai)(shai)(shai)(shai)(shai)(shai)面(mian)下(xia)層(ceng)的(de)(de)(de)(de)顆(ke)(ke)粒間隙就(jiu)更難(nan)。

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