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  2. Ombilin Coal Mine - Wikipedia

    en.wikipedia.org/wiki/Ombilin_Coal_Mine

    The Ombilin Coal Mine (formerly PT Tambang Batubara Ombilin (TBO)) is a coal mine near Sawahlunto, West Sumatra, Indonesia. It is located in a narrow valley along the Bukit Barisan mountains, among the Polan, Pari, and Mato hills, approximately 70 kilometres (43 mi) northeast of Padang .

  3. Tin mining in Indonesia - Wikipedia

    en.wikipedia.org/wiki/Tin_mining_in_Indonesia

    Small-scale mining of tin in modern Indonesia might have begun in Bangka by the 7th century; some exports of tin from Bangka are dated to the 13th century. After the arrival of the Dutch in the region, the Dutch East India Company (VOC) signed a treaty with the Palembang Sultanate which granted the VOC monopoly rights over Bangka's tin trade in ...

  4. Copper mining in Indonesia - Wikipedia

    en.wikipedia.org/wiki/Copper_mining_in_Indonesia

    The Grasberg mine has been cited as one of the largest single taxpayers in Indonesia, [3] [17] contributing 0.6 percent to Indonesia's GDP (96 percent of the GDP of Mimika Regency where the mine is located) and generating 17.3 billion USD in revenue for the Indonesian government between 1992 and 2017 through taxes, export duties, royalties, and ...

  5. Acid mine drainage - Wikipedia

    en.wikipedia.org/wiki/Acid_mine_drainage

    At this pH, most toxic metals become insoluble and precipitate, aided by the presence of recycled sludge. Optionally, air can be injected in the tank to oxidize iron(II) and manganese(II) and assist in their precipitation. The resulting slurry is directed to a sludge-settling vessel, such as a clarifier. In that vessel, clean water will ...

  6. Grasberg mine - Wikipedia

    en.wikipedia.org/wiki/Grasberg_mine

    PT Freeport Indonesia (PTFI) is the company that currently manages Grasberg mine. The mining company is a joint venture between Indonesian and American interests, with the Indonesian government through its state-owned company PT Mineral Industri Indonesia (MIND ID) and PT Indonesia Papua Metal & Mineral, a company co-owned by MIND ID and ...

  7. Batu Hijau mine - Wikipedia

    en.wikipedia.org/wiki/Batu_Hijau_mine

    The mine is the second largest copper-gold mine in Indonesia behind the Grasberg mine of PT. Freeport Indonesia. Freeport Indonesia. The mine is located 1,530 kilometres (950 mi) east of the Indonesian capital Jakarta on Sumbawa , an island in West Nusa Tenggara Province, more precisely in the southern part of West Sumbawa Regency .

  8. National Air Operations Command - Wikipedia

    en.wikipedia.org/wiki/National_Air_Operations...

    The National Air Defense Forces Command was established on 9 February 1962 as the air defense division of that operation commanded by AVM H.M.Sujono on the basis of the TNI Joint Service Air Defense Command (Komando Pertahanan Udara Gabungan APRI) whose commander for Papuan air force operations was Colonel Leo Wattimena of the Air Force.

  9. Nickel mining in Indonesia - Wikipedia

    en.wikipedia.org/wiki/Nickel_mining_in_Indonesia

    Nickel mining in Sulawesi. Nickel mining in Indonesia began with small-scale exploratory mining operations during the Dutch East Indies era and began to expand in the 1960s. . Most of Indonesia's proven nickel reserves are located in the islands of Sulawesi and Halmahera, and the country has the largest annual production and reserves of nickel in the wor

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