本文简要叙述一种微细粒嵌布的贫磁-赤铁矿,采用以分散脱泥为主的浮选流程和以离心选矿机为主的磁重流程的多方案试验。当磨矿细度为93～95％-37μ,采用脱泥-反浮选和单-脱泥流程的指标分别为:α=27.15％,β=60.74％,e=73.35％:α=27.82％,β=54.69％,ε=73.4-77.9％。当磨矿细度93～94％-200目,采用弱磁-离心选矿机;弱磁-浓缩脱泥-离心选矿机,弱磁-强磁-离心选矿机,弱磁-离心选矿机加脱泥四种流程的指标:α=27.4～27.7％,β=53.6-54.4％,e=70.5～71.6％。各流程的指标均达到了当时上级规定的指标要求。 In this paper, a brief description of a fine grain embedded lean magnetite - hematite, the use of decentralized desliming flotation process and centrifugal concentrator magnetic gravity-based multi-program test. When grinding fineness is 93-95% -37μ, the indexes of desilting-reverse flotation and single-desliming process are: α = 27.15%, β = 60.74%, e = 73.35%, α = 27.82% , β = 54.69%, ε = 73.4-77.9%. When the grinding fineness of 93 to 94% -200 mesh, the use of weak magnetic - centrifugal concentrator; weak magnetic - concentrated desliming - centrifugal concentrator, weak magnetic - strong magnetic - centrifugal concentrator, weak magnetic - centrifugal concentrator plus The indexes of four processes of mud: α = 27.4-27.7%, β = 53.6-54.4%, e = 70.5-71.6%. The indicators of each process have reached the level of the requirements of the index.