摘要
国内磁铁矿品位整体偏低,且随着开采深入贫化率呈现上升趋势,显著增加了选矿成本,制约了铁矿企业的持续发展,因此,“多碎少磨,能抛早抛”仍然是铁矿山选矿工艺设计及改造的重要指导原则。当前铁矿破碎粒级趋细,(超)细碎已成为主流破碎工艺,细粉含量增加,粗粒矿石与细粉之间易产生黏附、夹杂、团聚现象,常规干式预选设备分选效果不佳。针对以上问题,本文介绍了一种旋转磁场干选技术,其通过筒体与磁系的快速异步旋转,实现了高频次磁翻转,可有效打散团聚体,减少黏附、夹杂问题,显著提升分选指标,在铁矿(超)细破碎预选工艺段具有广阔应用前景。
The domestic iron ore grade is on the low side as a whole,and along with the mining depth dilution rate presents the upward trend,has increased the mineral processing cost obviously,has restricted the iron ore enterprise's sustainable development.Therefore,"More crushing,less grinding,can cast early cast"is still an important guiding principle for the design and transformation of beneficiation process in iron mines.At present,the crushing size of iron ore tends to be fine,(ultra)fine crushing has become the main crushing technology,the content of fine powder increases,the adhesion,inclusion and agglomeration between coarse ore and fine powder are easy to occur,the effect of conventional dry pre-selection equipment is not good.In order to solve the above problems,this paper introduces a kind of rotary magnetic field dry cleaning technology,which can realize high frequency magnetic flip by the fast asynchronous rotation of the cylinder and the magnetic system,and can effectively break up the agglomerate,and reduce the occurence of adhesion and inclusion,the test results show that it can improve the separation index remarkably,and has a broad application prospect in the pre-concentration section of iron ore(ultra-fine)crushing.
作者
彭欣苓
PENG Xinling(BGRIMM Technology Group,Beijing 100160,China;BGRIMM Machinery&Automation Technology Co.,Ltd.,Beijing 100160,China)
出处
《有色设备》
2024年第4期74-78,共5页
Nonferrous Metallurgical Equipment
基金
“十四五”国家重点研发计划资助(2021YFC2902400)。
关键词
铁矿
(超)细碎
干式预选
旋转磁场
磁翻转
选矿
干选机
iron ore
(ultra)fine
dry preselection
rotating magnetic field
magnetic flip
mineral processing
dry separator
