Distribution characteristics of minerals and elements in chromite ore processing residue

被引：0

作者：

Li G. ^{[1
]}

Xiao K. ^{[1
]}

机构：

[1] School of Civil Engineering and Mechanics, Huazhong University of Science and Technology

来源：

Transactions of Tianjin University | 2012年 / 18卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Chromite ore processing residue; Chromium; Element distribution; Mineralogy; Scanning electron microscopy;

D O I：

10.1007/s12209-012-1576-1

中图分类号：

学科分类号：

摘要：

In this paper, environmental scanning electron microscopy (ESEM) is applied to characterizing the mineral and element distribution of chromite ore processing residue (COPR). The test results show that Cr-bearing brownmillerite occurs in the rim of COPR particle, while hydroandradite with Cr (VI) in its structure presents inside the COPR particle. Periclase and calcite occur in the interstitial area. Element analyses show that Ca, Fe and Al are distributed throughout the COPR particle, and Mg exists mostly in the interstitial area or on the particle surface. A lower content of Cr is evenly distributed in the COPR particle, while slightly higher concentration of Cr occurs inside the particle. It is suggested that it will take a relatively longer time for Cr to migrate out of COPR, especially for hexavalent chromium, so the leaching time and the particle size may be two important factors to affect the release of Cr (VI). © 2012 Tianjin University and Springer-Verlag Berlin Heidelberg.

引用

页码：52 / 56

页数：4

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