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振動篩工(gong)作影響因(yin)素
發布:12&dNaJsmW1瀏(liu)覽:849次
篩(shai)(shai)分(fen)(fen)(fen)(fen)(fen)過(guo)程的技術經濟(ji)指(zhi)標是篩(shai)(shai)分(fen)(fen)(fen)(fen)(fen)效(xiao)率和生(sheng)(sheng)產(chan)率,前者為(wei)質量(liang)(liang)指(zhi)標,后者為(wei)數量(liang)(liang)指(zhi)標。它們(men)之間有一(yi)定的關系,同時還與其他許多因素(su)有關,這些(xie)因素(su)決定篩(shai)(shai)分(fen)(fen)(fen)(fen)(fen)的結果。影響(xiang)篩(shai)(shai)分(fen)(fen)(fen)(fen)(fen)過(guo)程的因素(su)大(da)體可(ke)以(yi)分(fen)(fen)(fen)(fen)(fen)三(san)類:包括(kuo)物(wu)(wu)(wu)料(liao)本身的粒(li)(li)度(du)組(zu)成、濕(shi)(shi)(shi)度(du)、含泥量(liang)(liang)和粒(li)(li)子的形狀等。當(dang)(dang)物(wu)(wu)(wu)料(liao)細粒(li)(li)含量(liang)(liang)較(jiao)大(da)時,篩(shai)(shai)子的生(sheng)(sheng)產(chan)率也大(da)。當(dang)(dang)物(wu)(wu)(wu)料(liao)的濕(shi)(shi)(shi)度(du)較(jiao)大(da)時,一(yi)般來說篩(shai)(shai)分(fen)(fen)(fen)(fen)(fen)效(xiao)率都會降低。但篩(shai)(shai)孔尺寸愈大(da),水分(fen)(fen)(fen)(fen)(fen)影響(xiang)愈小(xiao),所(suo)以(yi)對于含水分(fen)(fen)(fen)(fen)(fen)較(jiao)大(da)的濕(shi)(shi)(shi)物(wu)(wu)(wu)料(liao),為(wei)了改善(shan)篩(shai)(shai)分(fen)(fen)(fen)(fen)(fen)過(guo)程,一(yi)般可(ke)以(yi)采(cai)用(yong)加大(da)篩(shai)(shai)孔的辦法,或者采(cai)用(yong)濕(shi)(shi)(shi)式篩(shai)(shai)分(fen)(fen)(fen)(fen)(fen)。物(wu)(wu)(wu)料(liao)含泥量(liang)(liang)大(da)(當(dang)(dang)含泥量(liang)(liang)大(da)于8%時)應當(dang)(dang)采(cai)用(yong)濕(shi)(shi)(shi)式篩(shai)(shai)分(fen)(fen)(fen)(fen)(fen),或預先洗礦。
篩面結構參數的影響(xiang)
直線篩(shai)(shai)(shai)(shai)(shai)是(shi)使粒子和篩(shai)(shai)(shai)(shai)(shai)面(mian)(mian)(mian)作(zuo)垂直運動(dong)(dong),所(suo)以篩(shai)(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)高(gao),生(sheng)(sheng)產能力(li)大。而(er)粒子與(yu)篩(shai)(shai)(shai)(shai)(shai)面(mian)(mian)(mian)相對運動(dong)(dong)主要是(shi)平(ping)行運動(dong)(dong)的(de)(de)棒條(tiao)篩(shai)(shai)(shai)(shai)(shai)、平(ping)面(mian)(mian)(mian)振動(dong)(dong)篩(shai)(shai)(shai)(shai)(shai)、筒篩(shai)(shai)(shai)(shai)(shai)等,其篩(shai)(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)和生(sheng)(sheng)產能力(li)都低。對于一(yi)定(ding)(ding)的(de)(de)物料而(er)言(yan),篩(shai)(shai)(shai)(shai)(shai)子的(de)(de)生(sheng)(sheng)產率(lv)(lv)和篩(shai)(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)決(jue)定(ding)(ding)于篩(shai)(shai)(shai)(shai)(shai)孔(kong)尺寸(cun)(cun)。生(sheng)(sheng)產率(lv)(lv)取(qu)決(jue)于篩(shai)(shai)(shai)(shai)(shai)面(mian)(mian)(mian)寬(kuan)度,篩(shai)(shai)(shai)(shai)(shai)面(mian)(mian)(mian)寬(kuan)生(sheng)(sheng)產率(lv)(lv)高(gao)。篩(shai)(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)取(qu)決(jue)于篩(shai)(shai)(shai)(shai)(shai)面(mian)(mian)(mian)長(chang)(chang)度,篩(shai)(shai)(shai)(shai)(shai)面(mian)(mian)(mian)長(chang)(chang)篩(shai)(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)高(gao)。一(yi)般長(chang)(chang)寬(kuan)比為(wei)2。有效(xiao)(xiao)的(de)(de)篩(shai)(shai)(shai)(shai)(shai)子面(mian)(mian)(mian)積(ji)(即篩(shai)(shai)(shai)(shai)(shai)孔(kong)面(mian)(mian)(mian)積(ji)與(yu)整個篩(shai)(shai)(shai)(shai)(shai)面(mian)(mian)(mian)面(mian)(mian)(mian)積(ji)之比)愈大,則篩(shai)(shai)(shai)(shai)(shai)面(mian)(mian)(mian)的(de)(de)單(dan)位(wei)面(mian)(mian)(mian)積(ji)生(sheng)(sheng)產率(lv)(lv)和篩(shai)(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)愈高(gao)。篩(shai)(shai)(shai)(shai)(shai)孔(kong)尺寸(cun)(cun)愈大,則單(dan)位(wei)篩(shai)(shai)(shai)(shai)(shai)面(mian)(mian)(mian)的(de)(de)生(sheng)(sheng)產率(lv)(lv)越大,篩(shai)(shai)(shai)(shai)(shai)分(fen)效(xiao)(xiao)率(lv)(lv)越高(gao)。
生產(chan)條件的影響
當篩(shai)(shai)子(zi)的(de)(de)(de)負荷較大時(shi),篩(shai)(shai)分(fen)(fen)效(xiao)率(lv)(lv)低。在很(hen)大程度上(shang)圓振(zhen)(zhen)動篩(shai)(shai)篩(shai)(shai)子(zi)的(de)(de)(de)和平(ping)率(lv)(lv)取(qu)決于篩(shai)(shai)孔(kong)大小和總篩(shai)(shai)分(fen)(fen)效(xiao)率(lv)(lv);篩(shai)(shai)孔(kong)愈(yu)大,要(yao)求(qiu)篩(shai)(shai)分(fen)(fen)效(xiao)率(lv)(lv)愈(yu)低時(shi),則生產率(lv)(lv)愈(yu)高(gao)。給料均勻性對篩(shai)(shai)分(fen)(fen)過程意義很(hen)大。篩(shai)(shai)子(zi)的(de)(de)(de)傾角(jiao)要(yao)適宜,一(yi)般通過試驗來確定。再就是(shi)篩(shai)(shai)子(zi)的(de)(de)(de)振(zhen)(zhen)幅與振(zhen)(zhen)次,這與篩(shai)(shai)子(zi)的(de)(de)(de)結構物(wu)性有(you)關,在一(yi)定的(de)(de)(de)范(fan)圍內(nei),增加(jia)振(zhen)(zhen)動可以提高(gao)篩(shai)(shai)分(fen)(fen)指標。