不(bu)管(guan)是(shi)使(shi)用(yong)什(shen)麼(me)設(she)備(bei),從(cong)事(shi)什(shen)麼(me)行(xing)業(ye),用(yong)戶(hu)最(zui)關(guan)心(xin)的(de)永(yong)遠(yuan)是(shi)生(sheng)產(chan)效(xiao)率(lv),這(zhe)是(shi)毋(wu)庸(yong)置(zhi)疑(yi)的(de),也(ye)是(shi)設(she)備(bei)廠(chang)家(jia)努(nu)力(li)要(yao)達(da)成(cheng)的(de)目(mu)標(biao)。本(ben)文(wen)紅(hong)星(xing)專(zhuan)家(jia)為(wei)大(da)家(jia)講(jiang)解(jie)永(yong)磁(ci)筒(tong)式(shi)磁(ci)選(xuan)機(ji)的(de)相(xiang)關(guan)知(zhi)識(shi)。影(ying)響(xiang)永(yong)磁(ci)筒(tong)式(shi)磁(ci)選(xuan)機(ji)工(gong)作(zuo)的(de)因(yin)素(su)較(jiao)多(duo),除(chu)了(le)我(wo)們(men)熟(shu)知(zhi)的(de)底(di)箱(xiang)型(xing)式(shi)、磁係結構、磁場特性,還有那些那些因素會影響設備選別效率?
一、分選濃度
分fen選xuan濃nong度du的de大da小xiao決jue定ding一yi定ding礦kuang量liang的de礦kuang漿jiang流liu速su,影ying響xiang礦kuang粒li的de分fen選xuan時shi間jian。濃nong度du高gao,流liu速su慢man,阻zu力li大da,精jing礦kuang中zhong易yi夾jia雜za脈mai石shi,降jiang低di精jing礦kuang質zhi量liang。但dan由you於yu選xuan別bie時shi間jian較jiao長chang,對dui回hui收shou率lv有you利li。反fan之zhi,若ruo分fen選xuan濃nong度du低di,精jing礦kuang品pin位wei可ke以yi高gao些xie,而er尾wei礦kuang品pin位wei也ye會hui增zeng高gao,使shi回hui收shou率lv降jiang低di。
二、磁選偏角
磁ci係xi偏pian角jiao如ru果guo不bu適shi當dang將jiang會hui明ming顯xian影ying響xiang分fen選xuan指zhi標biao。所suo謂wei磁ci係xi偏pian角jiao就jiu是shi磁ci係xi弧hu麵mian中zhong心xin線xian與yu圓yuan筒tong中zhong心xin垂chui直zhi線xian的de夾jia角jiao。磁ci係xi偏pian後hou尾wei礦kuang品pin位wei低di,但dan大da偏pian後hou時shi,由you於yu精jing礦kuang不bu能neng提ti升sheng到dao精jing礦kuang端duan脫tuo落luo,反fan而er使shi尾wei礦kuang品pin位wei升sheng高gao。若ruo磁ci係xi偏pian前qian,則ze使shi精jing礦kuang提ti升sheng過guo高gao,掃sao選xuan區qu減jian短duan,也ye使shi尾wei礦kuang品pin位wei升sheng高gao,所suo以yi磁ci係xi偏pian角jiao應ying調tiao整zheng到dao適shi中zhong位wei置zhi。
三、工作間隙
粗(cu)選(xuan)區(qu)圓(yuan)筒(tong)表(biao)麵(mian)到(dao)底(di)箱(xiang)底(di)板(ban)之(zhi)間(jian)距(ju)離(li)稱(cheng)為(wei)工(gong)作(zuo)間(jian)隙(xi)。工(gong)作(zuo)間(jian)隙(xi)的(de)大(da)小(xiao)會(hui)影(ying)響(xiang)分(fen)選(xuan)的(de)效(xiao)果(guo)。間(jian)隙(xi)大(da),礦(kuang)漿(jiang)的(de)流(liu)量(liang)亦(yi)大(da),有(you)利(li)於(yu)提(ti)高(gao)處(chu)理(li)量(liang),但(dan)由(you)於(yu)離(li)圓(yuan)筒(tong)表(biao)麵(mian)較(jiao)遠(yuan),磁(ci)場(chang)強(qiang)度(du)較(jiao)低(di),所(suo)以(yi)會(hui)使(shi)尾(wei)礦(kuang)品(pin)位(wei)升(sheng)高(gao),降(jiang)低(di)金(jin)屬(shu)回(hui)收(shou)率(lv)。
反fan之zhi,若ruo工gong作zuo間jian隙xi小xiao,則ze增zeng大da磁ci場chang力li,會hui使shi精jing礦kuang品pin位wei降jiang低di,但dan回hui收shou率lv可ke以yi高gao些xie。若ruo工gong作zuo間jian隙xi太tai小xiao,礦kuang漿jiang流liu速su會hui過guo快kuai,使shi礦kuang粒li來lai不bu及ji吸xi到dao圓yuan筒tong表biao麵mian就jiu被bei礦kuang漿jiang流liu帶dai到dao尾wei礦kuang,將jiang造zao成cheng尾wei礦kuang品pin位wei升sheng高gao,甚shen至zhi會hui使shi尾wei礦kuang排pai出chu困kun難nan,出chu現xian“滿槽”現象。因此在磁選機的安裝與維修時要注意保證合適的工作間隙。
四、圓筒轉速
圓筒轉速的大小對選別指標也有影響,轉速低、產量低;轉速高,礦粒所受離心力大,單位時間內磁翻作用增加,精礦品位與處理能力都高,而回收率則降低。
除(chu)此(ci)之(zhi)外(wai),還(hai)有(you)其(qi)他(ta)可(ke)以(yi)影(ying)響(xiang)磁(ci)選(xuan)效(xiao)率(lv)的(de)小(xiao)細(xi)節(jie),如(ru)調(tiao)節(jie)給(gei)礦(kuang)的(de)吹(chui)散(san)水(shui)與(yu)精(jing)礦(kuang)的(de)衝(chong)洗(xi)水(shui)也(ye)很(hen)重(zhong)要(yao)。不(bu)管(guan)是(shi)在(zai)生(sheng)活(huo)還(hai)是(shi)工(gong)作(zuo)中(zhong),處(chu)處(chu)留(liu)心(xin)皆(jie)學(xue)問(wen),紅(hong)星(xing)機(ji)器(qi)也(ye)希(xi)望(wang)大(da)家(jia)都(dou)能(neng)在(zai)工(gong)作(zuo)中(zhong)不(bu)斷(duan)學(xue)習(xi),不(bu)斷(duan)進(jin)步(bu),不(bu)斷(duan)成(cheng)長(chang),不(bu)斷(duan)有(you)更(geng)多(duo)更(geng)好(hao)的(de)新(xin)發(fa)現(xian)。
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