首页|基于柱式弱磁选探究磨矿细度与精矿品位的关系

基于柱式弱磁选探究磨矿细度与精矿品位的关系

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为探究在最佳柱式弱磁选条件下磨矿细度与精矿品位的关系,对柱式弱磁选上升水流速度、粗选磁场、扫选磁场和磁场变化周期进行优化试验,并利用最佳参数进行不同磨矿细度分选试验,从而拟合磨矿细度与精矿品位的关系曲线.结果表明,上升水流速度为26.5×10-2 m·s-1、粗选(恒定)磁场电流为2 A、扫选磁场电流为1.1 A、磁场变化周期为3 s、磨矿细度(-0.074 mm含量)为92.65%时,分选出品位为70.65%的铁精矿;利用磨矿细度(-0.074 mm含量)在92.65%的试验结果对拟合曲线进行验证,误差为0.01%,结合VSM及SEM结果,确定柱式弱磁选的最佳给矿粒度(d50)应保持在25.7 µm左右.拟合曲线理论上达到了提前预测柱式分选品位的目的,为利用深度学习实现柱式分选智能化提供前期研究,为柱式精选设备磁系优化提供理论支撑.
The Relationship Between Grinding Fineness and Concentrate Grade Based on Column Weak Magnetic Separation
In order to find the relationship between grinding fineness and concentrate grade under the best conditions of column weak magnetic separation,optimization tests were carried out on the rising water flow velocity,roughing magnetic field,scavenging magnetic field and magnetic field variation period of column weak magnetic separation.The best parameters were used for separation tests with different grinding fineness,so as to fit the relationship curve between grinding fineness and concentrate grade.The results show that under the conditions of rising water velocity of 26.5 × 10-2 m·s-1,roughing(constant)magnetic field current of 2 A,scavenging magnetic field current of 1.1 A,magnetic field variation period of 3 s,and the grinding fineness(-0.074 mm content)of 92.65%,the iron concentrate with grade of 70.65%is obtained.The fitting curve has been verified by the test results of grinding fineness(-0.074 mm content)at 92.65%,and the error is 0.01%.Combined with VSM and SEM results,it is determined that the optimal feed particle size(d50)of column weak magnetic separation should be maintained at about 25.7 μm.In theory,the fitting curve has achieved the purpose of predicting the grade of column separation in advance,which provides preliminary research for the realization of intelligent column separation by deep learning,and provides a theoretical support for the optimization of magnetic system of column cleaning equipment.

Iron concentrateColumn weak magnetic separationGrinding finenessConcentrate gradeSeparation rule

张洺睿、李明宇、陈婉晴、孙雪妍

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抚顺罕王傲牛矿业股份有限公司,辽宁抚顺市 113000

辽宁省铁矿资源开发与利用专业技术创新中心,辽宁抚顺市 113000

铁精矿 柱式弱磁选 磨矿细度 精矿品位 分选规律

2024

矿业研究与开发
长沙矿山研究院有限责任公司 中国有色金属学会

矿业研究与开发

CSTPCD北大核心
影响因子:0.763
ISSN:1005-2763
年,卷(期):2024.44(1)
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