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中南大学学报(自然科学版)

Journal of Central South University

第50卷    第5期    总第297期    2019年5月

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文章编号:1672-7207(2019)05-1013-08
高压辊磨超细粉碎对钒钛磁铁矿分选的影响
郭小飞1,代淑娟1,朱巨建1,李丽匣2,王洪彬3, 4

(1. 辽宁科技大学 矿业工程学院,辽宁 鞍山,114051;
2. 东北大学 资源与土木工程学院,辽宁 沈阳,110819;
3. 攀钢集团矿业有限公司设计研究院,四川 攀枝花,617063;
4. 钒钛资源综合利用国家重点实验室,四川 攀枝花,617063
)

摘 要: 采用常规颚式破碎和高压辊磨2种不同粉碎方式,进行钒钛磁铁矿的分选试验,探究2种破碎方式对钒钛磁铁矿分选的影响,并结合粒度分析、单体解离度测试及比磁化系数分析,进一步研究高压辊磨机在钒钛磁铁矿选别中的作用机理。研究结果表明:高压辊磨机粉碎产品的粒度较小,可直接通过弱磁选将钛磁铁矿和钛铁矿分离开,进行“铁钛平行分选”;与颚式破碎机破碎产品相比,辊压产品经过一段磨矿过程就能通过相同的分选条件获得质量合格的钛磁铁矿精矿,并使钛铁矿精矿TiO2的作业回收率提高2.66%;2种破碎产品在球磨过程中的单体解离度存在差异,辊压产品中的含铁矿物能够优先实现单体解离,有利于钛磁铁矿的分选;“铁钛平行分选”能够简化磨矿过程,减少微细粒钛铁矿的生成量,提高钛铁矿强磁选的回收率,有利于钛铁矿的窄级别浮选。

 

关键字: 高压辊磨机;钒钛磁铁矿;铁钛平行分选;单体解离度;比磁化系数

Influence of ultrafine comminution by high pressure grinding rolls on separation of vanadium titanium magnetite
GUO Xiaofei1, DAI Shujuan1, ZHU Jujian1, LI Lixia2, WANG Hongbin3, 4

1. School of Mining Engineering, University of Science and Technology Liaoning, Anshan 114051, China;
2. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China;
3. Design and Research Institute of Pangang Group Mining Co. Ltd., Panzhihua 617063, China;
4. State Key Laboratory of Vanadium and Titanium Comprehensive Utilization, Panzhihua 617063, China

Abstract:The separation experiments of vanadium titanium magnetite (V-Ti) crushed by conventional jaw crusher and high pressure grinding rolls (HPGR) were conducted. The influences of two different comminuting processes on separation of V-Ti magnetite were studied. Combined with the anslysis of particle size, degree of mineral liberation and specific susceptibility, the mechanism of HPGR in the separation process of V-Ti magnetite was studied. The results show that the products of HPGR are finer than those of conventional jaw crusher. Parallel separation of titanium magnetite(Fe) and ilmenite(Ti) can be realized through direct separation of Fe and Ti by low intensity magnetic separation from product crushed by HPGR. Qualified titanium magnetite can be obtained by only once grinding and other similar conditions, and the TiO2 operational recovery of ilmenite increases by 2.66%. The mineral degree of liberation in the primary grinding from this two comminuting processes become obviously different. Iron minerals of HPGR product preferentially achieve monomer dissociation, which benefits the separation of titanium magnetite. On the other hand, the parallel separation of Fe and Ti simplifies the grinding and reduces the generation of micro-fine ilmenite, which is beneficial to the high intensity magnetic separation and flotation of narrow size for ilmenite.

 

Key words: high pressure grinding rolls; vanadium titanium magnetite; parallel separation of Fe and Ti; liberation degree; specific susceptibility

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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