| 韦访,谢振朝,覃瑞才,宫研,张启连.广西金龙堆积铝土矿质量-粒级分布规律与勘查意义[J].矿产勘查,2024,15(7):1176-1184 |
| 广西金龙堆积铝土矿质量-粒级分布规律与勘查意义 |
| Quality-size distribution law and exploration significance of Jinlong accumulated bauxite deposit in Guangxi |
| 投稿时间：2023-12-21 修订日期：2024-02-06 |
| DOI：10.20008/j.kckc.202407005 |
| 中文关键词: 粒级 含矿率 资源量估算 金龙 广西 |
| 英文关键词: fraction ore bearing rate resource estimation Jinlong Guangxi Province |
| 基金项目:本文受广西壮族自治区人力资源和社会保障厅项目“广西关键矿产资源深部勘查人才小高地”（桂组通字〔2019〕85号，2019—2023年）、广西壮族自治区科学技术厅项目“广西沉积型铝土矿成矿理论研究和找矿突破关键技术研发与示范（桂科AB21196028号）”与广西壮族自治区地质矿产局项目“桂西地区沉积型铝土矿控矿因素、成矿规律与找矿预测研究”（桂地矿综研〔2021〕85号）联合资助。 |
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| 中文摘要: |
| 桂西地区堆积铝土矿矿石质量与粒级大小密切相关，本文统计金龙地区堆积铝土矿不同粒级主要成分Al2O3、Fe2O3、SiO2、灼失量、铝硅比（Al/Si）及含矿率分布特征，分析表明：（1）Al2O3、Fe2O3含量均随矿石粒级的变化而变化，前者随粒级的变小而减少，更细粒级（0.1~1cm）流失加剧；后者随粒级的变小而增多，并随粒级的减少表现出更强劲的富集态势。（2）矿石粒径由>3 cm到1~3 cm的变小过程中，SiO2大量流失，但小于1 cm粒径的矿石在自然条件下并不利于硅的流失，反而表现为硅的相对富集。（3）矿石粒级以＞3 cm为主，＜3 cm粒径矿石含矿率多数未达工业边界含矿率（≥200 ㎏/m3）要求。（4）资源量估算中确定单工程有（无）矿时应优先考虑Al2O3含量，其次为铝硅比（Al/Si），再次为含矿率。（5）Al2O3含量、铝硅比（Al/Si）与矿石粒级密切相关，在普查找矿阶段或勘查区仅有部分粒级净矿石质量达到工业要求时应严格分粒级采样分析，最大限度地圈定工业矿体，避免工业矿体低品位化或漏矿。 |
| 英文摘要: |
| The ore quality of accumulated bauxite in western Guangxi is closely related to the grain size. In this paper， the distribution characteristics of Al2O3， Fe2O3， SiO2， burn loss， Al/Si ratio and ore content of bauxite in different grain sizes in Jinlong area are analyzed. The analysis shows that： （1）The content of Al2O3 and Fe2O3 changes with the change of ore particle size， the former decreases with the decrease of particle size， and the loss of finer particle size （0.1-1 cm） increases； （2） The latter increases with the decrease of particle size， and shows a stronger enrichment trend with the decrease of particle size. In the process of ore particle size decreasing from >3 cm to 1-3 cm， a large amount of SiO2 is lost， but the ore with particle size less than 1cm is not conducive to the loss of silicon under natural conditions， but shows the relative enrichment of silicon.（3）The ore particle size is mainly >3 cm， and the ore content of <3 cm particle size ore does not meet the requirements of industrial boundary ore content （≥200 kg/m3）. （4）In the estimation of resource reserves， it is determined that Al2O3 content should be given priority when a single project has （no） ore， followed by Al/Si， and then ore-bearing rate. （5）The content of Al2O3 and Al/Si are closely related to the grain size of the ore. In the prospecting stage or the exploration area， only part of the grain size of the net ore quality to meet the industrial requirements should be strictly graded sampling and analysis， to maximize the delineation of industrial ore bodies， to avoid low-grade industrial ore bodies or ore leakage. |
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