Bambang Suwondo Rahardjo
Pusat Pengkajian dan Penerapan Teknologi Pengembangan Sumberdaya Energi, Deputi Bidang Teknologi Pengembangan Sumberdaya Alam - BPP Teknologi
Abstract
Up to now, coke consumption is used as an industrial fuell sector especially for foundries mostly still being depending on imported coke. As the result as the economical crisis was in Indonesia, some Foundry industries had to stop target production. Briquetted coke made of Ombilin coal through double process is an alternative fuel foundries to solve the problem mentioned above. The briquetted coke is assesed by joint research between BPPT and MTRDC since 1995 and it has tested in 1997 at a cast iron private company (PT. Sinar Industri) Klaten Central Java by using aa simplified cupola kiln(it’s called Tungku Tukik). Ombilin briquetted coke can be use as fuel and reductor for cast iron industries resulted good quality of cast iron product, high temperature of molten iron ( 1318°C) and carbon content = 3.27%. Physical characteristics of briquetted coke is strong enough with drop shatter index (97.39% ± 2%) and tensile strength (54.32 kg/cm²). Exhaust gas (gas SO2 and gas NO2) contents of briquetted coke combustion result nearly = 0, so that it is not caused air pollution in the surrounding area.
