Jurnal Puslitbang tekMira (Teknologi Mineral dan Batubara)
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THE LAND REHABILITATION OF MINE OUT AREA OF SAND QUARRY IN CIKALAHANG VILLAGE, DUKUH PUNTANG DISTRICT, CIREBON REGENCY
No full textThe sand quarry activities in Cikalahang Village, District of Dukuhpuntang, Cirebon Regency had been illegally mined by hundreds of people. The land properties are owned by the Cikalahang Village. Those mine areas are close to the Telaga Remis (Remis Lake) , which is administratively included in the Kuningan Regency. The existence of illegal mining has disturbed both of local government and people community. In the regional government point of view, the illegal mining will not significantly contribute to generate regional income, whilst for many people their mining activities will produce a destruction to the environment. These can be seen from the objection of the people that request the government to stop all of mine activities because of disturbance to environmental condition of the Telaga Remis (Remis Lake) as one of the water resources for the Cirebon Regency. Based on the intensity of the people requirements, the government of Cirebon Regency had decided to close all of activities of the illegal mining in those area in 2006. According to the decision of Cirebon Regent and the Office of Environment, Forestry and Mining Cirebon Regency, it had prepared planning for rehabilitation and restoration to recover the natural and environmen- tal capability in the mined out areas with respect to the regional spatial planning, land utilization and community demand. The intention of study is to analyse the currently condition of environment in those area including people perception and then making further evaluation to obtain the properly environmental pic- tures for determining the real and strategic action. Data resources to support the study were collected through primary and secondary data. The primary data of physical-chemical component can be obtained by taking instantaneous samples of soil and surface water in the area of study. To identify the people perception, some questioners have been spreaded out to the various strata of people in order to obtain their perception and also direct interview will be applied in this study. The secondary data required for this study such as regional spatial planning, regional landuse and regional regulations will be taken from some institutions in Cirebon Regency. Result analyses showed that the soil characteristics in mined out area were poor because of lack of nutrient and high porousity and the water of Telaga Remis and mine out area could be used as fishing cultivation and household water. The final study shows that the mined out area can potentially be developed as tourism resort in accordance with people request. The other consideration this area is adjacent to Telaga Remis with the background of the beautiful panorama of Mount Ciremai
INDUSTRIAL MINERALS IN WEST KALIMANTAN AND THEIR UTILIZATION FOR CERAMIC PRODUCTS
No full textThe Province of West Kalimantan has abundant source of industrial minerals such as kaolin, ball clay, quartz and zircon that can be utilized as ceramic raw materials. These materials are spread out in Regencies of Sambas, Singkawang, Bengkayang, Sanggau and Sintang. From various industrial minerals found in West Kalimantan, only clay and kaolin have been utilized by the ceramic industries in West Kalimantan, West Java, Central Java, East Java and Bali. The other industrial minerals such as bauxite, zircon, ilmenite, quartz still have not been utilized for ceramics commodity. Therefore to empower all industrial mineral types from these areas as ceramic raw materials, it is necessary to do a circumstantial and comprehensive study of those minerals based on the result of preliminary research related to ceramic raw materials, whether by using them directly for ceramic products or through processing beforehand. From this study, it is expected that the industrial minerals in West Kalimantan can be empowered to be optimally utilized for white or coloured ceramic bodies, glaze, refractory and other ceramic products
APPLICATION OF REVERSE FLOTATION METHOD FOR THE UPGRADING OF IRON OXIDE CONTAINED IN CALCINE LATERITE ORE
No full textReverse flotation was adopted for Indonesian iron-rich laterite ore from Pomalaa to float siliceous minerals in the separation of iron mineral. Nickel siliceous mineral such as garnierite is one of the silicate minerals containing in laterite ore that are undesirable and must be eliminated from the ore before used as raw material for iron making industry. Calcine laterite product was obtained from reduction process in rotary kiln for 3 hours at 900 °C by transforming limonite/goethite to magnetite containing Fe 45.6 % and Ni 1.16 %. The reverse flotation tests were focused on the separation of iron mineral from nickel mineral using amine complex, ARMAC-C, a commercially available amine thioacetate as collector. Influences of pulp pH, dosages of collector amine complex and frother, and also solid percent of pulp on the reverse flotation of calcine laterite ore were investigated. The optimal condition was obtained at pH 10, collector 1000 g/t and frother 25 g/t at solid percent of 30%. The test results show that after one-stage rough reverse flotation the concentrate had Fe and Ni grades of 77.5% and 0.5% with recoveries of 57.3% and 33.7%, respectively. Therefore, it is possible to use iron-rich lateritic ore to produce magnetic concentrates by using magnetizing roasting followed by reverse iron flotation
PHILLIPSITE MINERAL IN DEEP SEA SEDIMENT FROM SINGLE CORE IN ROO RISE, INDIAN OCEAN
No full textDuring the MD III - IMAGES IV Expedition, one of the cores that has length around 30.30 m below sea floor (bsf) was obtained using gigantic piston corer from the depth of 3,884 m below sea level (bsl). This core (MD982156) is located in Roo Rise, Indian Ocean, south of East Jawa, outer part of Jawa Trench. The sediment consists of abundance planktonic foraminifera in the upper part while in the lower part, there is no planktonic one. The latter is mostly composed of phillipsite-rich sediment (± 40%) that is possibly derived from tephra. The base of the core between the depths of 30 – 30.30 m bsf is composed of clay sediment, consisting of minerals derived from zeolite group (phillipsite), gibbsite, and other cryptocrystalline masses. Phillipsite was deposited as an authigenic deep sea sediment, whereas gibbsite is usually deposited within bodies of water. Besides, there are also nanno- plankton accumulated in the crystal of phillipsite. This part has an age of Late Miocene or older. This fact is supported by the overlain layer containing planktonic foraminifera species Sphaeroidinellopsis seminulina of Late Miocene age (N17). The thickness and the lateral continuity of this layer are still unknown
INDONESIAN LOW RANK COAL RESOURCES TO WHICH UBC TECHNOLOGY IS COMMERCIALLY APPLICABLE
No full textLow rank coal (LRC) that constitutes more than 65% of the national coal resources has to be utilized optimally in order to achieve the security of domestic energy supply and an optimum mix of primary energy consumption by the year 2025. The LRC can be upgraded to higher rank coal, both for export and domestic use, particularly for existing industries. Upgraded Brown Coal (UBC) process is one of the best upgrading technologies that can be implemented. Moreover, the low cost production of LRC and the availability of infrastructures would be the more attractive for UBC commercialization. Based on the coal quality specification recommended in this paper, the total moisture of the LRC varies from25.33 to 57.89% (typical 35 - 40%, as received/ar) and its calorific value ranges from 2,504 to 4,900 kcal/kg (typical 3,000 - 4,000 kcal/kg, ar). The ash content of the recommended LRC is less than 10% (typical <5%, dry basis/db) and the sulphur content is typical <0.5% (db). The LRC located in East and South Kalimantan is more attractive for UBC commercialization compared to LRC located in South Sumatera. Most of the LRC in South Sumatera is located far inland that makes the transporta- tion cost for UBC equipment and product become expensive
COAL LIQUEFACTION IN INDONESIA: CURRENT STATUS AND FUTURE PROGRAMME
No full textThe Presidential Decree No. 5/2006 and Presidential Instruction No. 2/2006 about Supply and Exploi- tation of Liquefied Coal as Other Fuel has instructed the interrelated department, including the Ministry of Energy and Mineral Resources, to bring about the development of coal liquefaction plant in Indone- sia, and make use of its product - in the form of oil fuel. To implement the instruction, the Coordinating Ministry for Economic Affairs issued Decision Letter, No. KEP-11/M.EKON/02/2006 about Coordina- tor of Team Action Programmed Supply and Use of Alternative Energy and KEP-01/D.III.M.EKON/02/ 2006 about Technical Coordinator Action Programme Supply and Use of Alternative Energy. Some activities that have been done by the coal liquefaction team in 2006 were the socialization of coal liquefaction to introduce the coal liquefaction technology to the investors. It is expected that the investors will be interested in investing their financial capital in the coal liquefaction
