KARAKTERISTIK BATUBARA TERPENGARUH INTRUSI DI TAMBANG AIR LAYA, SUMATRA SELATAN DAN POTENSINYA SEBAGAI MATERIAL UNTUK PEMBUATAN GRAFIT SINTETIS: THE CHARACTERISTICS OF HEAT-AFFECTED COAL IN AIR LAYA MINE, SOUTH SUMATRA AND ITS POTENTIAL AS AN ALTERNATIVE SOURCE OF SYNTHETIC GRAPHITE
| Main Authors: | Arsha Maulana, Ferian Anggara |
|---|---|
| Format: | Article info application/pdf Journal |
| Bahasa: | ind |
| Terbitan: |
Pusat Sumber Daya Mineral Batubara dan Panas Bumi
, 2020
|
| Subjects: | |
| Online Access: |
http://buletinsdg.geologi.esdm.go.id/index.php/bsdg/article/view/BSDG_VOL_15_NO_3_2020_4 http://buletinsdg.geologi.esdm.go.id/index.php/bsdg/article/view/BSDG_VOL_15_NO_3_2020_4/283 |
Daftar Isi:
- Graphite can be applied in various uses for example as a heat resistant materials, batteries, and electrodes. Graphite material can be obtained from synthetic graphite which produced from anthracite coal that is heated at 2000oC or above. Naturally heat affected coal can be found in Tambang Air Laya (TAL), Tanjung Enim, South Sumatra where the coal is affected by the presence of igneous intrusion. According to these conditions, it is important to conduct the research to determine the characteristics of heat affected coal and its potential as an alternative source of synthetic graphite. Four samples of heat affected coal obtained from four seams with varying distances to the body of igneous intrusion are prepared for several analyses, namely petrographic, random vitrinite reflectance (Rvr), proximate, X-Ray Diffractometry (XRD), Total Carbon (TC), Total Organic Carbon (TOC), and Total Inorganic Carbon (TIC), as well as micro-Raman spectroscopy. The heat affected coal shows the tendency of increasing vitrinite reflectance and fixed carbon content and decreasing moisture and volatile matter towards the igneous intrusion body. The heat affected coal (A1 Coal) with the closest distance to the igneous intrusion body has the highest rank (low volatile bituminous coal; %Ro= 2,01%) and mineral percentage. A1 Coal is associated with mineral lempung such as illite, smectite, and rektorit that can increase the degree of crystalinity in the process of coalification and that would catalyze the formation of synthetic graphite in the next process.
- Grafit dapat diaplikasikan dalam berbagai macam kegunaan misal sebagai material tahan panas, baterai, dan elektroda. Material grafit bisa didapat melalui grafit sintetis yang berasal dari batubara antrasit yang terpanaskan pada suhu di atas 2000oC. Kondisi batubara yang terpanaskan secara alami dapat ditemui pada batubara yang terpengaruh intrusi batuan beku di Tambang Air Laya (TAL), Tanjung Enim, Sumatra Selatan. Penelitian ini bertujuan untuk mengetahui karakteristik batubara terpengaruh intrusi batuan beku dan potensinya sebagai material untuk pembentukan grafit sintetis. Empat sampel batubara yang berasal dari 4 seam dengan jarak bervariasi terhadap intrusi diambil dan dipreparasi untuk dilakukan analisis sayatan poles, random vitrinite reflectance (Rvr), proksimat, X-Ray Diffractometry (XRD), Total Carbon (TC), Total Organic Carbon (TOC), Total Inorganic Carbon (TIC), serta analisis micro-Raman spectroscopy. Batubara terpengaruh intrusi batuan beku di lokasi penelitian mengalami kenaikan vitrinite reflectance dan kandungan fixed carbon (karbon tertambat) serta penurunan nilai moisture (kadar lengas) dan volatile matter (zat terbang) seiring berkurangnya jarak terhadap tubuh intrusi. Batubara seam A1 berperingkat low volatile bituminous coal (%Ro= 2,01%) yang memiliki jarak terdekat dengan tubuh intrusi memiliki derajat pembatubaraan dan kandungan presentase mineral tertinggi. Batubara seam A1 memiliki banyak asosiasi mineral lempung yang dijumpai seperti ilit, smektit, dan rektorit sehingga dapat meningkatkan derajat kristalinitas dalam proses pembatubaraan dan akan mempermudah pada proses pembentukan grafit sintesis dalam proses selanjutnya.