More than thirty years ago,microprobe analysis introduced the possibility of analyzing quantitatively in situ small surfaces of polished sections ,redering obsolete many of the optical measurements and other data that had been presented in many standard ore-mineralogy textbooks,and thus a new approach to the subject was called for.in addition ,it sh…
After the coking tests had shown that because of the mechanical properties required only briquetted coke would be suit-able for the blast funnace, all coal from pulau laut and pulau sebuku, which was still available for testing purposes, was converted into briqwetted coke (sec Dr. Jenkner Preliminary Report, Vol.6, Annex IV and Annex I to this Repor…
In order to be able to included the project of a steelworks in the second Five-year Plan (beginning in 1959), Biro perantjang Negara (hereinafter called BPN), after having made an invitation for offers in spring 1955, decided in March 1956 to entrust Westdeutsches Ingenieur-Buro Dr.Rohland KG., Dusseldorf (hereinafter called WEDEXRO) with the task …
In the framework of the work entrusted to WEDEXRO in 1958 "the suitability of the sigihan coal for metallurgical purposes was to be determined" and at the same time "it appeared advisable to carry out a critical examination of the state of the sigihan mine".
Peninjauan terhadap penyebaran pasir besi disekitar kota Agung dilaksanakan dari tanggal 10 sampai 26 pebruari 1976 dalam rangka melengkapi data penyebaran pasir besi di seluruh pantai selatan lampung. Daerah yang ditinjau terletak di Teluk Semangko antara Desa Kerta di sebelah timur desa Walimpah di Sebelah barat sepanjang kira kira 25 km.
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Dengan dilaksanakannya program kebijaksanaan energi nasional, khususnya yang menyangkut penggunaan batubara sebagai sumber energi pengganti bahan bakar minyak, kebutuhan batubara pada masa datang akan meningkat dengan pesat. Peningkatan kebutuhan batubara ini harus diimbangi dengan peningkatan kapasitas produksi tambang-tambang batub…
Since The Early Beginnings Of the Bronze and Iron age charcoal has been used for heating and reducing purposes. In the direct production of iron a mixture of ore and charcoal is placed on a charcoal fire in earth holes or on hearths and burnt down with natural draught with the direct result that an iron ball reduced in the renn fire is obtained.