东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (7): 976-980.DOI: 10.12068/j.issn.1005-3026.2015.07.014

• 材料与冶金 • 上一篇    下一篇

瑞木红土矿摇床铬铁矿粗精的磁选富集

刘三平1， 畅永锋1， 路殿坤1， 蒋开喜2   

  1. (1. 东北大学 材料与冶金学院， 辽宁 沈阳110819; 2. 北京矿冶研究总院， 北京100044)
  • 收稿日期:2014-06-10 修回日期:2014-06-10 出版日期:2015-07-15 发布日期:2015-07-15
  • 通讯作者: 刘三平
  • 作者简介:刘三平(1973-)， 男， 湖南岳阳人， 东北大学博士研究生; 蒋开喜(1963-)，男，江苏姜堰人，北京矿冶研究总院研究员， 东北大学兼职博士生导师.
  • 基金资助:
    国家自然科学基金重点资助项目(51434001).

Magnetic Separation and Enrichment of Rough Chromite Concentrate from the Ramu Laterite Project

LIU San-ping1， CHANG Yong-feng1， LU Dian-kun1， JIANG Kai-xi2   

  1. 1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China; 2. Beijing General Research Institute of Mining & Metallurgy， Beijing 100044， China.
  • Received:2014-06-10 Revised:2014-06-10 Online:2015-07-15 Published:2015-07-15
  • Contact: LU Dian-kun
  • About author:-
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摘要： 瑞木红土矿中存在含铬尖晶石矿物，在进行矿浆管道输送和高压浸出之前需要先经过铬矿选矿处理，以减轻对管道和高压釜的磨损.目前瑞木红土矿项目选矿得到的铬铁矿精矿其铬铁质量分数比(w(Cr2O3)/w(FeO))仅为2.3，不能满足冶金级铬铁矿的要求.针对瑞木红土矿项目摇床分选所得的铬铁矿粗精矿开展了工艺矿物学和磁选提高铬铁质量分数比的研究.筛分实验和矿物提纯实验结果表明，去除细颗粒矿物以及分离脉石矿物是提高铬铁矿铬铁质量分数比的有效途径.对筛分后的+0.074mm的粗精矿进行磁选分离，所得到的铬铁矿精矿铬铁质量分数比为2.59，铬回收率为63.89%.

关键词: 红土矿, 铬铁矿, 工艺矿物学, 磁选, 富集

Abstract: As the existence of chromium related spinel ores may cause serious wear on the pipe and autoclave during the pipe transportation and high pressure acid leaching procedure， it is necessary to remove the chromium containing minerals from the nickeliferrous laterite ore from Ramu， Papua New Guinea. The main problem in the beneficiation of chromite in the Ramu project is that the w(Cr2O3):w(FeO) of chromite concentrate is merely 2.3， which can not meet the standard of metallurgical chromite product. This paper presents the results of detailed characterization of process mineralogy and magnetic separation of rough chromite concentrate obtained from tabling separation procedure of the Ramu project. The screen classification and purification tests show that the w(Cr2O3):w(FeO) of the rough chromite concentrate could be further enhanced by eliminating the fines and other gangue minerals. The magnetic separation of the +0.074mm rough chromite concentrate increased the w(Cr2O3):w(FeO) to 2.59 with 63.89% recovery of chromium.

Key words: laterite, chromite, process mineralogy, magnetic separation, enrichment

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