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矿用振动筛的处理能力与什么有关?


发布日(ri)期(qi):2022-06-22 16:27:43

  在(zai)选矿厂中(zhong),是常(chang)用的分级设备之一(yi),振(zhen)动(dong)筛(shai)(shai)(shai)的筛(shai)(shai)(shai)分效(xiao)果(guo)对后续作(zuo)业的意义(yi)非(fei)常(chang)重大,因(yin)此如何改善(shan)振(zhen)动(dong)筛(shai)(shai)(shai)的筛(shai)(shai)(shai)分效(xiao)果(guo)是一(yi)项需要考(kao)虑的问题,下面(mian)J9九游会AG 将(jiang)简(jian)单(dan)分析一(yi)下有哪些因(yin)素对筛(shai)(shai)(shai)分效(xiao)果(guo)产(chan)生影响,如何通过改变这些因(yin)素来(lai)提高振(zhen)动(dong)筛(shai)(shai)(shai)筛(shai)(shai)(shai)分效(xiao)果(guo)。

  
  矿用振动筛(shai)(shai)(shai)筛(shai)(shai)(shai)面(mian)运动的(de)形式与筛(shai)(shai)(shai)网上材(cai)(cai)料层的(de)松动以及需要相对(dui)于筛(shai)(shai)(shai)面(mian)运动筛(shai)(shai)(shai)选(xuan)的(de)精细材(cai)(cai)料的(de)速度方向和频(pin)率有关,从而影响分层和筛(shai)(shai)(shai)选(xuan)过(guo)程(cheng)。
脱水筛21.jpg
  
  1.筛网宽(kuan)度和(he)长度
  
  在正常(chang)(chang)情况下,振(zhen)(zhen)(zhen)动(dong)(dong)筛(shai)(shai)(shai)的(de)(de)(de)宽(kuan)度(du)(du)决定了筛(shai)(shai)(shai)的(de)(de)(de)处理能力。筛(shai)(shai)(shai)面越(yue)宽(kuan),处理能力越(yue)大。筛(shai)(shai)(shai)的(de)(de)(de)长(zhang)度(du)(du)决定了筛(shai)(shai)(shai)的(de)(de)(de)筛(shai)(shai)(shai)分效率(lv)。筛(shai)(shai)(shai)面越(yue)长(zhang),效率(lv)越(yue)高。对于振(zhen)(zhen)(zhen)动(dong)(dong)筛(shai)(shai)(shai),增加(jia)宽(kuan)度(du)(du)通常(chang)(chang)受到筛(shai)(shai)(shai)框结构强(qiang)度(du)(du)的(de)(de)(de)限(xian)制。通常(chang)(chang),宽(kuan)度(du)(du)越(yue)大,筛(shai)(shai)(shai)框的(de)(de)(de)寿命越(yue)短。目前(qian),振(zhen)(zhen)(zhen)动(dong)(dong)筛(shai)(shai)(shai)的(de)(de)(de)筛(shai)(shai)(shai)网宽(kuan)度(du)(du)一般小于2.5米(mi),而有(you)些(xie)国家的(de)(de)(de)筛(shai)(shai)(shai)网宽(kuan)度(du)(du)为5.5米(mi)。在筛(shai)(shai)(shai)子表面的(de)(de)(de)长(zhang)度(du)(du)达到***尺(chi)寸后,筛(shai)(shai)(shai)分效率(lv)很小或(huo)没有(you)增加(jia),并且增加(jia)筛(shai)(shai)(shai)子表面的(de)(de)(de)长(zhang)度(du)(du)仅增加(jia)了筛(shai)(shai)(shai)子的(de)(de)(de)体(ti)积和重量。筛(shai)(shai)(shai)子的(de)(de)(de)处理能力和筛(shai)(shai)(shai)选效率(lv)是两个相互依存的(de)(de)(de)指标,须(xu)同时考虑(lv)。通常(chang)(chang),在确定筛(shai)(shai)(shai)宽(kuan)之后,根据纵横比确定筛(shai)(shai)(shai)长(zhang)度(du)(du)。我国矿(kuang)用振(zhen)(zhen)(zhen)动(dong)(dong)筛(shai)(shai)(shai)纵横比为2,煤质振(zhen)(zhen)(zhen)动(dong)(dong)筛(shai)(shai)(shai)宽(kuan)度(du)(du)比为2.5。
  
  2.筛(shai)网(wang)角度
  
  先前(qian)已经描述了(le)振动筛(shai)(shai)(shai)(shai)筛(shai)(shai)(shai)(shai)网倾(qing)(qing)斜(xie)(xie)度对筛(shai)(shai)(shai)(shai)网尺寸的(de)(de)(de)(de)影响以及近(jin)似筛(shai)(shai)(shai)(shai)分的(de)(de)(de)(de)重要(yao)性。为了(le)便于筛(shai)(shai)(shai)(shai)网的(de)(de)(de)(de)排出,筛(shai)(shai)(shai)(shai)网表面有时会倾(qing)(qing)斜(xie)(xie)。倾(qing)(qing)斜(xie)(xie)角的(de)(de)(de)(de)大小与筛(shai)(shai)(shai)(shai)的(de)(de)(de)(de)生(sheng)产率和筛(shai)(shai)(shai)(shai)选效率密切相关。这(zhei)是(shi)因(yin)为倾(qing)(qing)斜(xie)(xie)角度大并且在(zai)筛(shai)(shai)(shai)(shai)网中向前(qian)移动的(de)(de)(de)(de)层的(de)(de)(de)(de)速度很快。它很大,但是(shi)材料停留在(zai)筛(shai)(shai)(shai)(shai)表面上的(de)(de)(de)(de)时间缩短(duan),颗粒可渗透的(de)(de)(de)(de)机会减少,筛(shai)(shai)(shai)(shai)分效率降低。
脱水筛10.jpg
  
  3.网孔的尺寸,形状(zhuang)和开口率(lv)
  
  筛(shai)(shai)(shai)(shai)(shai)(shai)孔越大(da),每单位筛(shai)(shai)(shai)(shai)(shai)(shai)面积的处理能力越高,筛(shai)(shai)(shai)(shai)(shai)(shai)分效(xiao)率越高。网(wang)格的大(da)小主要取决于筛(shai)(shai)(shai)(shai)(shai)(shai)选的目的和(he)要求。对于具(ju)有较大(da)粒径的常(chang)规筛(shai)(shai)(shai)(shai)(shai)(shai)网(wang),筛(shai)(shai)(shai)(shai)(shai)(shai)网(wang)尺(chi)寸通常(chang)等于筛(shai)(shai)(shai)(shai)(shai)(shai)网(wang)尺(chi)寸;但(dan)是(shi)(shi),当所需筛(shai)(shai)(shai)(shai)(shai)(shai)网(wang)尺(chi)寸较小时,振动(dong)筛(shai)(shai)(shai)(shai)(shai)(shai)筛(shai)(shai)(shai)(shai)(shai)(shai)网(wang)应略大(da)于筛(shai)(shai)(shai)(shai)(shai)(shai)网(wang)尺(chi)寸;对于近似筛(shai)(shai)(shai)(shai)(shai)(shai)选,筛(shai)(shai)(shai)(shai)(shai)(shai)子(zi)比筛(shai)(shai)(shai)(shai)(shai)(shai)子(zi)尺(chi)寸大(da)得(de)多。由圆形(xing)(xing)(xing)和(he)方形(xing)(xing)(xing)筛(shai)(shai)(shai)(shai)(shai)(shai)孔获得(de)的筛(shai)(shai)(shai)(shai)(shai)(shai)下(xia)物(wu)的形(xing)(xing)(xing)状是(shi)(shi)相(xiang)对规则的,并(bing)且片状和(he)条(tiao)形(xing)(xing)(xing)颗粒容易从矩(ju)形(xing)(xing)(xing)筛(shai)(shai)(shai)(shai)(shai)(shai)孔中泄漏。因此(ci),矩(ju)形(xing)(xing)(xing)筛(shai)(shai)(shai)(shai)(shai)(shai)孔通常(chang)做得(de)更小。




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