钛精矿重选分离含硅物相影响因素研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (6): 2070-2074.

钛精矿重选分离含硅物相影响因素研究

林银河¹, 李京伟², 王哲³, 唐勇⁴, 程相魁⁵, 黄晓丽⁶

1.宜宾学院材料与化学工程学部,宜宾 644000;
2.合肥工业大学材料科学与工程学院,合肥 230009;
3.北京科技大学钢铁冶金新技术国家重点实验室,北京 100083;
4.宜宾天原集团股份有限公司研究院,宜宾 644007;
5.攀枝花学院国际钒钛研究院,攀枝花 617000;
6.攀枝花市科技发展战略研究所,攀枝花 617000

收稿日期:2021-01-20 修回日期:2021-03-24 出版日期:2021-06-15 发布日期:2021-07-08
通讯作者: 李京伟,博士,研究员。E-mail:jwli@hfut.edu.cn
作者简介:林银河(1980—),男,博士,副教授。主要从事矿物材料分离提纯方面的研究。E-mail:linyinhe2009@163.com
基金资助:
国家自然科学基金(51874272,U1960101);中国科学院光伏与节能重点实验室基金(PECL2019KF003);重庆市自然科学基金(cstc2020jcyj-msxmX0060);钢铁冶金新技术国家重点实验室开放基金(KF20-03);四川省钒钛综合利用实验室基金(2018FTSZ37);西部青年学者支持计划

Influencing Factors of Si Phase Separation from Ilmenite by Gravity Concentration Method

LIN Yinhe¹, LI Jingwei², WANG Zhe³, TANG Yong⁴, CHENG Xiangkui⁵, HUANG Xiaoli⁶

1. Department of Materials and Chemistry, Yibin University, Yibin 644000, China;
2. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China;
3. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
4. Yibin Tianyuan Group Co., Ltd. Research Institute, Yibin 644007, China;
5. International Vanadium and Titanium Research Institute, Panzhihua University, Panzhihua 617000, China;
6. Panzhihua Science and Technology Development Strategy Research Institute, Panzhihua 617000, China

Received:2021-01-20 Revised:2021-03-24 Online:2021-06-15 Published:2021-07-08

摘要/Abstract

摘要： 针对四川某钛精矿中存在的硅含量过高的问题,提出了摇床重选法分离二氧化硅的方法。通过球磨工艺获得不同粒径颗粒,然后采用摇床进行重选,研究粒径大小、粒径组分占比、冲程等因素对钛精矿含硅相的分离效果。结果表明,随着磨矿时间的增加,-200目(＜75 μm)钛精矿占比逐渐增加。当研磨时间为8 min时,-200目钛精矿的占比为83.0%(质量分数)。随着冲程的增大,SiO₂的品位和TiO₂的回收率均呈逐渐增大的趋势。当冲程为15 mm时,SiO₂的品位由2.46%(质量分数)降低至1.07%。重选分离后原矿分为三部分,TiO₂品位:钛精矿>中矿>尾矿,SiO₂品位:钛精矿<中矿<尾矿。当-200目铁精矿占比85.5%(质量分数)时,重选后SiO₂的含量最低可降至0.93%(质量分数)。

关键词: 钛精矿, 二氧化硅分离, TiO₂品位, 重力分选, 冲程, 回收

Abstract: High content of Si phase is a critical problem in the ilmenite for the upgrade of titanium slag from Sichuan. The gravity concentration method was proposed to separate the SiO₂ phase from the ilmenite. Particles with different size were prepared by ball milling process, then the particles were treated by heavy machine. The separation effects of different factors (such as particle size, particle proportion and stroke) on the Si phase from ilmenite were investigated. These results indicate that the proportion of particles with less than -200 mesh (＜75 μm) increases with the grinding time extension. When the grinding time is 8 min, the proportion of particles with less than -200 mesh reaches 83.0% (mass fraction). With the increasing of the stroke, the content of SiO₂ and the recovery rate of TiO₂ increase. When the stroke is 15 mm, the content of SiO₂ decreases to 1.07% (mass fraction) from 2.46%. Three different parties are divided after gravity concentration treatment, the content relation of TiO₂ is ilmenite>middling product>tailing, and the content relation of SiO₂ is ilmenite<middling product<tailing. The minimum content of SiO₂ reaches 0.93% (mass fraction) when the proportion of particles with less than -200 mesh is 85.5% (mass fraction).

Key words: ilmenite, SiO₂ separation, TiO₂ content, gravity concentration separation, stroke, recovery

中图分类号:

TD954

林银河, 李京伟, 王哲, 唐勇, 程相魁, 黄晓丽. 钛精矿重选分离含硅物相影响因素研究[J]. 硅酸盐通报, 2021, 40(6): 2070-2074.

LIN Yinhe, LI Jingwei, WANG Zhe, TANG Yong, CHENG Xiangkui, HUANG Xiaoli. Influencing Factors of Si Phase Separation from Ilmenite by Gravity Concentration Method[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(6): 2070-2074.

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