【摘要】 采用SLon实验型连续式离心机(简称SLon实验型离心机),以高梯度磁选细粒赤铁矿尾矿得到的磁性产物(52.42%Fe)为试样,在给料体积速率为(24.5±0.4)L/min、给料固体浓度为20%和水束流冲击压力为0.45MPa的条件下,研究转鼓转速和水束流往复速度对连续离心分离指标的影响。研究结果表明:转鼓转速和水束流往复速度分别通过改变颗粒受离心力和流膜流动特性影响分离结果;当转鼓转速为450r/min和水束流往复速度为36mm/s时,铁精矿的铁品位和铁回收率分别为62.32%Fe和65.02%,说明应用SLon离心机分离提纯高梯度磁选细粒赤铁矿尾矿得到的磁性产物,再富集效果明显。更多还原

【Abstract】 An SLon pilot continuous centrifugal concentrator(SLon pilot centrifugal concentrator)was used to study the effects of drum rotation speed and reciprocating velocity of water sprays on the separation performance of the concentrator under the optimum conditions of feed volume flow rate(24.5±0.4)L/min,feed solids content 20%and impacting pressure of water sprays 0.45 MPa,with the high gradient magnetic separation concentrate assaying 52.42%Fe from fine hematite tailings as test material.The experimental results indicate that the drum rotation speed determines the centrifugal forces on particles and the reciprocating velocity of water sprays has a significant influence on the flowing characteristics of flowing film,thereby generating significant effects on the separation performance.By using the pilot concentrator to the magnetic concentrate at drum rotation speed of 450 r/min and reciprocating velocity of water sprays of 36 mm/s,a concentrate assaying 62.32%Fe with 65.02%recovery is achieved.It is therefore concluded that the SLon centrifugal concentration is efficient in reconcentrating the high gradient magnetic separation concentrate from the fine hematite tailings.更多还原