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[1]黄小芬,何桂旭,张 覃*. 贵州瓮福地区钙镁质磷矿石解离特性研究 [J].武汉工程大学学报,2025,47(03):237-244.[doi:10.19843/j.cnki.CN42-1779/TQ.202312012]
　HUANG Xiaofen,HE Guixu,ZHANG Qin*. Liberation characteristics of Ca-Mg-bearing phosphate ore in Wengfu district,Guizhou [J].Journal of Wuhan Institute of Technology,2025,47(03):237-244.[doi:10.19843/j.cnki.CN42-1779/TQ.202312012]
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贵州瓮福地区钙镁质磷矿石解离特性研究
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
47
期数:
2025年03期
页码:
237-244
栏目:
现代大化工
出版日期:
2025-06-30

文章信息/Info

Title:
Liberation characteristics of Ca-Mg-bearing phosphate ore in Wengfu district,Guizhou
文章编号:
1674 - 2869（2025）03 - 0237- 08
作者:
1. 贵州大学矿业学院，贵州 贵阳 550025；2. 贵州科学院，贵州 贵阳 550001；
3. 喀斯特地区优势矿产资源高效利用国家地方联合工程实验室，贵州 贵阳 550025；
4. 贵州省非金属矿产资源综合利用重点实验室，贵州 贵阳 550025
Author(s):
1. College of Mining, Guizhou University, Guiyang 550025, China; 2. Guizhou Academy of Science, Guiyang 550001, China; 3. National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China; 4. Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources, Guiyang 550025, China
关键词:
Keywords:
分类号:
TD 91
DOI:
10.19843/j.cnki.CN42-1779/TQ.202312012
文献标志码:
A
摘要:
通过光学显微镜镜下鉴定、 X 射线荧光光谱、X 射线衍射、BPMA工艺矿物学参数自动分析等分析测试手段，研究了贵州瓮福地区中低品位钙镁质磷矿石的矿物组成、主要矿物的嵌布特征及矿物解离特性等。研究表明：矿石中主要有用矿物为磷灰石集合体和少量微晶状、柱状磷灰石，脉石矿物为白云石、石英，矿物嵌布粒度细，磷灰石多以镶嵌、包裹等形式与白云石、石英紧密共生，部分细粒级白云石被包裹在磷灰石中，磨矿过程中磷灰石、白云石较难单体解离，矿石磨至-75 μm后，仍有约50% 的磷灰石和约30% 的白云石与其他矿物连生或被包裹，且白云石在磨矿过程中易泥化，是影响选别指标的重要因素。通过实验室闭路循环磨矿可有效降低白云石等易泥化矿物的过磨，从而提高磷精矿P2O5 含量及MgO 脱除率。
Abstract:
This study investigated the mineral composition, occurence patterns, and liberation characteristics of a medium-to-low grade calcium-magnesium phosphate ore from the Wengfu area of Guizhou Province using optical microscopy, X-ray fluorescence spectroscopy (XRF), X-ray diffraction(XRD), and BGRIMM Process Mineralogy Analysis (BPMA). Results indicated that the ore primarily comprises the valuable mineral apatite aggregates with minor microcrystalline and columnar apatite, while dolomite and quartz dominate the gangue minerals. The apatite exhibits intricate intergrowths with dolomite and quartz through fine-grained inlays and inclusions, with some fine dolomite particles encapsulated in apatite. Liberation analysis revealed that even after grinding to a particle size below 75 mm, approximately 50% of apatite and 30% of dolomite remaine interlocked or encapsulated with other minerals. Notably, dolomite is prone to overgrinding and slime formation during comminution, critically impacting separation efficiency. Laboratory-scale locked-cycle grinding experiments demonstrated that optimized grinding protocols effectively mitigated dolomite overgrinding and argillization, achieving a phosphate concentrate with enhanced P2O5 content and improved MgO removal rate.

参考文献/References:

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相似文献/References:

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备注/Memo

备注/Memo:
收稿日期：2023-12-09
基金项目：国家重点研发计划项目（2018YFE0110300）
作者简介：黄小芬，博士，高级实验师。Email：xfhuang@gzu.edu.cn
*通信作者：张 覃，博士，教授。Email: zq6736@163.com
引文格式：黄小芬，何桂旭，张覃. 贵州瓮福地区钙镁质磷矿石解离特性研究［J］. 武汉工程大学学报，2025，47（3）：237-244.
更新日期/Last Update: 2025-07-08