We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Study on Dissemination Characteristics of Fe-bearing Minerals in Bayan Obo Polymetallic Ore.
- Authors
MA Hongwei; SUN Yongsheng; ZHU Xinran; GAO Peng; LI Wenbo
- Abstract
Bayan Obe polymetallic ore is one of the complex and difficult-to-process iron ore resources in China. In recent years, the key technology of which has been studied, but the utilization rate of iron resources is low. In order to understand the change of ore properties, the dissemination characteristics of iron minerals are in this polymetallic ore was studied by chemical analysis, the mineral fiberation analyzer system, polarized microscope and scanning electron microscope. The results clre show that the content of Fe in the polymetallic ore is 31. 55%, and the main Fe-bearing minerals are magnetite, hematite, limonite, pyrite (pyrrhotite) and siderite, and the content of magnetite is 9.467% and the content of hematite is 31.280%. The iron minerals are mainly magnetic iron and hematite-limonite phases, and the polymetallic ore magnetic susceptibility is 49.15%, which is a mixed iron ore type. In the polymetallic ore, magnetite is often embedded in gangues with interlaced net structure, and a small amount of pyrite is included, while hematite appears in the forms of with porphyritic, granular, disseminated and scaly aggregates. In addition, there are micro inclusion structures in both. The grains of the iron minerals are 55% -- 40 µm, and the magnetite and hematite are closely associated with fluorite hematite, magnetite, rare earth minerals, quartz, barite, calcite, iron dolomite, et al. At the grinding fineness of 60% -- 74 µm, the iron ore fiberation degree reaches 82.78%, but it is difficult to dissociate microfine iron minerals inclusions from gangue and microfine gangue inclusions from iron minerals. Therefore, stage grinding and tine grinding is the key to efficient recovery of the iron minerals.
- Subjects
CHINA; RARE earth metals; MINERALS; IRON ores; PYRITES; HEMATITE; PYRRHOTITE; SCANNING electron microscopes
- Publication
Nonferrous Metals (Mineral Processing Section), 2024, Issue 5, p46
- ISSN
1671-9492
- Publication type
Article
- DOI
10.3969/j.issn.1671-9492.2024.05.005