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Bachtiar Effendi
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INDONESIA
Indonesian Mining Journal
Published by Balai Besar Pengujian Mineral dan Batubara tekMIRA
ISSN : 08549931     EISSN : 25278797     DOI : 10.30556/imj
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology
This Journal is published periodically two times annually : April and October, containing papers of research and development for mineral and coal, including exploration, exploitation, processing, utilization, environment, economics and policy. The editors only accept relevant papers with the substance of this publication.
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 277 Documents
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PRETREATMENT OF KAOLIN INTO METAKAOLIN REZKY I. ANUGRAH; SYAFEI S. RASJAD
Indonesian Mining Journal Vol 13 No 3 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 3 October 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No3.2010.517

Abstract

Most of metakaolin is used in portland cement industries as an additive to improve the compressive strength of the cement. Using Cicalengka and Bangka kaolin as metakaolin raw material, R & D Center for Mineral and Coal Technology found that Bangka kaolin was more suitable in metakaolin preparation because its initial Al2O3 content (32.80%) rises up to 37.50% after decantation, meanwhile Cicalengka one can not fulfill the requirements. The non-decanted Bangka kaolin (37.50% Al2O3) exceeds the Al2O3 content of metakaolin that has been produced commercially by Asian Ceratec Corporation. Calcination processing follows the decantation one. The decanted Bangka kaolin was then pelletized to have calcining burnt did well. The pellet was burnt in 1 x 0.5 m static laboratory furnace at some tempera- tures and holding times. Burning temperature of 9000 C and 20 minutes holding time showed common calcined kaolin characteristic; sheet-like structure, but at some parts it has developed into unregularly thicker sheet structure due to amorphous (non-reactive phase) formation. This phenomenon signs that recrystallization temperature has been achieved and many hydroxil ions has been lost.
STRATEGY TO MAXIMIZING THE USE OF COAL AND ASSOCIATED GASEOUS FUELS IN SOUTH SUMATERA BASIN BUKIN DAULAY; DATIN F. UMAR; BINARKO SANTOSO; SUGANAL SUGANAL
Indonesian Mining Journal Vol 13 No 3 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 3 October 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No3.2010.518

Abstract

South Sumatera Basin has been known as one of the most promising sedimentary basins in Indonesia. This basin has large coal resources and is currently also believed to have an enormous amount of coalbed methane (CBM) resources. The coal seam in the basin is considerably thick and continuous, low ash and sulphur contents and could be found at favourable depth for CBM development. Coal seams can be ex- ploited by traditional mining methods, which are open cut and underground minings. When the coal seam is not economic to exploit using traditional method, underground coal gasification (UCG) technology could be implemented to optimize the use of coal and associated gaseous fuels in the basin. However, CBM operation has to be conducted before UCG operation. South Sumatera coal could be utilized for direct combustion in mine site in order to reduce transport cost; could be upgraded to obtain high calorific value coal or converted to gas, liquid and coke fuels through gasification, liquefaction and carbonization technologies.
CHARACTERISTICS OF SELECTED MANGKALIHAT COALS ACCORDING TO PETROGRAPHIC AND PROXIMATE ANALYSES BINARKO SANTOSO; NINING S. NINGRUM
Indonesian Mining Journal Vol 13 No 3 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 3 October 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No3.2010.519

Abstract

A carbonate complex in the Mangkalihat area, East Kalimantan, has been selected for this study, because this area has some coal deposits associated with dominant limestone intercalated by thin claystone and sandstone. Commonly, most Indonesian coals were formed in fluvial and deltaic depositional environment. Accordingly, this study is interesting due to the depositional environment of the coals in association with a marine condition. This environment mostly results in relatively high mineral matter and sulphur contents, particularly pyrite in this study; brighter lithotype and dominant vitrinite content over liptinite and inertinite. The geologic factors have clearly proven a good correlation among the results of megascopic, microscopic and proximate analyses. The coals with brighter lithotype, high vitrinite and moisture contents were formed under a wetter marsh environment. On the other hand, the duller lithotypes with the presence of inertinite and mineral matter were deposited in a dryer marsh environment. The presence of high pyrite and sulphur contents strongly indicates a marine incursion during the coal forming in this area.
IMPLEMENTATION IMPACT OF LAW NO. 4 YEAR 2009 ON MINERAL AND COAL MINING TOWARDS MINERAL AND COAL BUSINESS DEVELOPMENT DARSA PERMANA
Indonesian Mining Journal Vol 13 No 2 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 2 June 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No2.2010.526

Abstract

The issuance of Law No. 4 Year 2009 on Mineral and Coal Mining has certainly an impact on the manage- ment of mineral and coal mining operations throughout Indonesia as the law brings lots of new issues related to the regional autonomy that is contradictive to the previous issued regulation, i.e. Law No. 11 Year 1967 regarding centralized Main Guidelines on Mining. Surveys to several regions and business operation show that various problems have occurred. It needs early action to avoid bigger problems that will create a negative impact to the investment climate in mineral and coal mining sector, and will eventually hinder the improvement of people welfare.
MARBLE WASTE AND FLY ASH UTILIZATIONS FOR FINE CERAMIC RAW MATERIALS SUBARI SUBARI; SURIPTO SURIPTO
Indonesian Mining Journal Vol 13 No 2 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 2 June 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No2.2010.527

Abstract

The possibility of using marble waste and fly ash taken from a textile industry as raw materials for producing fine ceramics was studied. Besides those two materials, clay was also used as the formed agent for ceramic body. There were four compositions noted as T1, T2, T3 and T4 that consist of marble waste 10 %, fly ash 10– 25 % and clay 65 – 80 %. They were formed by the method of slip casting.The tests pieces of these fine ceramic bodies were then fired at temperature of 600 °C. The glaze were applied to the bodies and further fired at temperature of 1150 °C in a gas kiln. Characterization results of those four composition tests show that the composition of T2 (70 % of clay, 10 % of marble waste and 20 % of fly ash) gives the best result.
TRENDS IN SUPPLY / DEMAND FOR INDONESIAN COAL PERIOD 2005 - 2025 TRISWAN SUSENO
Indonesian Mining Journal Vol 13 No 2 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 2 June 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No2.2010.528

Abstract

In 2008, Indonesia mineable coal reserve was recorded around 7.12 billion tons. During that year, around231.18 million tons were exploited. Of such a figure, 69.44 million tons went to domestic market and the rest belonged to export. Yet, in 2025 the need of coal for local consumption may reach 192.33 million tons that include 99.86 million tons for steam power plant, 30.58 million tons for cement industries, and 17.59 million tons for textile industries. Pulp and other industries may consume 2.92 million tons and 41.39 million tons respectively. It is assumed that in 2025, Indonesian coal export will increase to 260.92 million tons Coal export is assumed to increase figuring Coal Mining Agreement as the biggest exporter (94.03%). The rest goes to Mine authority (3.55%) and State-owned Enterprises (2.43%). However, the possibility of unre- corded coal utilization for ether domestic use and export reaches 51.66 million tons. As a result, it is presumed that Indonesian coal production in 2025 is around 504.92 million tons. The production rate during 2010-2025 is 4.9% per annum. According to the above condition, the mineable coal reserve of 7.12 million tons will probably be finished for about 18 years. In addition, the coal-steamed power that operates until now has an age of 26 years. If the reserve is not well-managed, it will immediately be finished in the shorter time. That is why, it needs an anticipative step of a policy concept that can maintain a sustainability of the domestic coal stock by implementing a limited export.
STUDY OF ADDITIVE, SIZE FRACTION AND COAL CONCENTRATION FOR COAL WATER FUEL FAHMI SULISTYOHADI; GANDHI K. HUDAYA
Indonesian Mining Journal Vol 13 No 2 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 2 June 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No2.2010.529

Abstract

Coal Water Fuel (CWF) is one of energy diversifications. It enables the coal to substitute fuel oil by existing installations because CWF could flow similar to the flow of liquid. Selections of additive, coal size fraction, ratio coal and water of CWF were studied in laboratory scale. Arutmin coal, processed with Upgraded Brown Coal (UBC) technology, was grouped to -60 and -200 meshes and then are mixed with water and small quantities of additive. Size fraction, coal concentration and additive type were varied to investigate their effects on CWF behavior. Results from concentration and penetration tests show that the best additive for CWF with size fraction - 200 mesh is DBS (Doacely Benzene Sulfanat) with optimum coal concentration is 51% using size - 60 mesh indicate, that the most stable CWF was resulted from CWF using DBS with optimum coal concentration 55 %. Results of using different size fraction that show the decrease of concentration and penetration rate from CWF with size fraction - 200 mesh is relatively constant compared to the CWF with size fraction – 60 mesh.
PETROGRAPHIC PROPERTIES OF PALAEOGENE SOUTHERN BANTEN COAL SEAMS WITH REGARD TO GEOLOGIC ASPECTS BINARKO SANTOSO
Indonesian Mining Journal Vol 13 No 2 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 2 June 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No2.2010.530

Abstract

The Palaeogene coal deposits occur in three coalfields in the Banten Province, which are distributed in Bayah, Cihideung and Cimandiri. The Bayah coals (Eocene Bayah Formation) mainly comprise vitrinite and subordinate inertinite and are of sub-bituminous A to high volatile bituminous A ranks (0.60-0.79%). The Cihideung coals (Eocene Bayah Formation) are of sub-bituminous A to medium volatile bituminous ranks (0.53-1.23%) and composed mainly of vitrinite. The Cimandiri coals (Oligocene Cijengkol Formation) are composed of variable proportions of vitrinite in the main and inertinite in very minor amounts. The rank of the coals is sub-bituminous A and high volatile bituminous A varying between 0.64% and 0.83% in vitrinite reflectance. Evaluation of these coals indicates that they tend to have similar coal petrographic properties and were formed in a littoral-neritic environment. Some of the coals, especially the Cihideung coals, show the highest vitrinite content and higher rank (0.99-1.23%), which is high A-medium volatile bituminous, due to an intrusive activity. Most of the coals have high contents of mineral matter (pyrite), mainly in the Bayah coals (2-13%), and this indicates that the coals were influenced by marine incursion during their deposition.
ANALYSIS OF REGIONAL REGULATION ON GENERAL MINING SECTOR (MINERAL AND COAL) DARSA PERMANA
Indonesian Mining Journal Vol 13 No 1 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 1 February 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No1.2010.537

Abstract

As Law No. 22 Year 1999 on Regional Government was implemented and then renewed by Law No. 32 Year 2004 on the same subject, all autonomous areas have issued various regional regulations, including that on general mining (mineral and coal). This is in line with the requirement of all autonomous areas for authority in managing their own regions based on the autonomy principles. After one decade since the regulation was applied, evaluation conducted by the government revealed that regional regulation in the general mining sector oriented mostly on increasing regional revenue without taking into consideration the existing legal principles. Surveys on 8 provinces showed similar facts, and the condition led to an unconducive business climate that could hinder the economic growth and the regions’ investment opportunity.
EVALUATION OF IRON ORE FROM SOUTH KALIMANTAN AND TAILING OF PT. FREEPORT AS CATALYST PRECURSORS FOR DIRECT COAL LIQUEFACTION MIFTAHUL HUDA; HERMANU PRIJONO; NINING S. NINGRUM; SUGANAL SUGANAL
Indonesian Mining Journal Vol 13 No 1 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 1 February 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No1.2010.538

Abstract

Research on catalyst derived from minerals for coal liquefaction reaction remains attractive since Indonesia has various kinds of minerals which are suitable to be used as catalyst precursors. In this research, iron ore from South Kalimantan and tailing of PT. Freeport were examined their activities to find the most suitable catalyst precursor for coal liquefaction reaction. Experiments were performed using a 0.5 litre batch type autoclave equipped with a horizontal shaking unit (54 times per minute) at reaction temperature, initial hydrogen pressure and reaction time of 400oC, 10 MPa and 1 hr, respectively. The result showed that tailing produced lower oil yield and coal conversion than those of iron ore. Tailing is suspected to experience slower hydrogen transfer rate during coal liquefaction since it produced larger pyrrhotite crystal size than that of iron ore.

Page 12 of 28 | Total Record : 277

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