Satria Bara Group. Is the world&＃39;s largest producer of Kalimantan Coal. Known worldwide among coal producers, the kalimantan coal is located in the kalimantan isalnd (South Kalimantan, east kalimantan, middle of kalimantan. Satria Bara Groups provides coal with high Btu&＃39;s and low sulfur content from some of the open mines on the Kalimantan Island, Indonesia. Customers on some continents have Kalimantan Coal to meet their demanding metallurgical and thermal specifications.