南非southpansberg煤田Tshipise次盆地6号煤层选矿焦煤岩石学与地球化学特征

IF 0.9 4区材料科学 Q3 Materials Science

Journal of The South African Institute of Mining and Metallurgy Pub Date : 2022-09-20 DOI:10.17159/2411-9717/2061/2022

Moffat Sebola, G. Drennan, N. Wagner

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引用次数: 0

摘要

South pansberg煤田拥有南非的硬焦煤储量。然而，与该国其他煤田相比，该地区的煤炭研究不足。本文研究了从南潘斯堡煤田Tshipise次盆地Makhado项目大直径钻孔岩心中提取的细浮子组分样品的特性。采用常规分析方法，对6号经济煤层6个煤层层位和3个煤层煤层样品进行了煤质、岩石组成、矿物学、地球化学(包括微量元素和稀土元素组成)和自由膨胀指数的测定。煤样分类为中阶烟煤(RoVmr = 0.88%， Rmax = 0.92%)，其组成为高镜质组(无矿物含量为97 vol%)。灰分样品具有较强的结块潜力(FSI为9)，总稀土浓度在570 ~ 3193 ppm之间。初步分析表明，除两个样品外，所有样品的总浓度都超过了1000ppm的临界值，因此很有可能是稀土元素的来源。需要进一步的研究来证实这些初步发现。

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Petrographic and geochemical characteristics of beneficiated metallurgical coal from the No. 6 Seam, Tshipise sub-basin, Soutpansberg coalfield, South Africa

The Soutpansberg Coalfield hosts South Africa's hard coking coal reserves. However, coals in this region are understudied compared to other coalfields in the country. This study characterizes the properties of fine-float fraction samples extracted from a wide diameter borehole core in the Makhado Project, Tshipise sub-basin, Soutpansberg coalfield. Conventional analyses were used to determine the coal quality, petrographic composition, mineralogy, geochemistry (including trace element and rare earth element composition), and free swelling index of samples from six coal horizons and three partings from the economic No.6 Seam. The coal samples are classified as medium rank bituminous C coals (0.88 %RoVmr, 0.92 %Rmax) and are highly vitrinitic in composition (97 vol% mineral matter free (mmf)). The samples show strong caking potential (FSI of 9). The total rare earth concentrations range between 570 and 3193 ppm in the ash samples. Preliminary analysis show all but two samples are promising sources of rare earth elements as the total concentrations exceeded the 1000 ppm cut-off grade. Further research is required to confirm these preliminary findings.

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来源期刊

Journal of The South African Institute of Mining and Metallurgy 工程技术-矿业与矿物加工

CiteScore

1.50

自引率

11.10%

发文量

审稿时长

4-8 weeks

期刊介绍： The Journal serves as a medium for the publication of high quality scientific papers. This requires that the papers that are submitted for publication are properly and fairly refereed and edited. This process will maintain the high quality of the presentation of the paper and ensure that the technical content is in line with the accepted norms of scientific integrity.