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1,.影響磁選機磁選效果最重要的因素就是給入磁選的給礦粒度,.給礦粒度的粗細對大部分礦石來說,標誌著礦石單體分離度的大小即磁性礦粒與脈石顆粒分離的程度,.如果給入礦石粒度小,說明礦物單體分離度高,能夠獲得滿意的選別指標;如果給入礦石粒度比較粗,說明礦物沒有充分解離,單體分離度不高,相反連生體較多即磁性顆粒與脈石仍然有相當部分結合在一起,.連生體由於也具有相當磁性,選別對相當部分可以選上來,使精礦品位降低,.因此,要求給入磁選機礦物必須充分達到單體分離,.對於嵌布粒度較粗的礦石,隻要礦物與脈石已達到單體分離就行了,不一定粒度過細,.這樣的礦石有時粒度雖然粗些,但選別質量卻不低,其主要原因是出於礦石嵌布粒度粗,磨到一定程度有用礦物與脈石就分開了,.
2,.礦漿濃度是影響磁選機磁選效果的主要因素之一,主要是指分級機溢流濃度大小,.如果礦漿濃度過大,造成分選濃度過高,就會嚴重影響精礦質量,.因為此時精礦顆粒容易被較細的脈石顆粒覆蓋和包裹分選不開,一起選上來使品位降低,.礦漿濃度過小即分選濃度過低,又會造成流速增大選別對間縮短,使一些本來有機會應該上來的細小磁性顆粒,落入尾礦使尾礦品位增高,造成損失,.所以,礦漿濃度要根據需要調整好,.在磁選機處調整主要是靠給礦吹散水的大小來調整,然而最主要的是分級溢流濃度必須根據磁選要求來完成,.給入礦漿濃度最大不能超過35%,一般控製在30%左右,要根據實際情況具體確定.
