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Indonesian Mining Journal

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Published by PUSLITBANG Teknologi Mineral dan Batubara

ISSN : 08549931 EISSN : 25278797 DOI : -

Core Subject : Science, Social, Engineering,

Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science

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 : -

Articles 263 Documents

10 11 12 13 14

EFFECT OF DISPERSING AND STABILIZING ADDITIVES ON RHEOLOGICAL CHARACTERISTICS OF THE UPGRADED BROWN COAL WATER MIXTURE DATIN F. UMAR; BUKIN DAULAY
Indonesian Mining Journal Vol 11, No 1 (2008): INDONESIAN MINING JOURNAL Vol. 11 No. 1 February 2008
Publisher : Puslitbang tekMIRA

The preparation of upgraded brown coal water mixture (UBCWM) by using an Indonesian upgraded coal that was produced by an upgraded brown coal (UBC) process in pilot scale, was carried out to obtain the effect of dispersing and stabilizing additives on rheological behaviour of the UBCWM. Three kinds of anionic dispersing additives, naphthalene sulfonate formaldehyde condensate (NSF), polymethacrylate (PMA) and polystyrene sulfonate (PSS) and three kinds of stabilizing additives, carboxyl methyl cellulose (CMC) an organic material a derivative of cellulose, rhansam gum (S-194) and gellan gum (S-60) some kinds of bio poly sacharide the trade mark of Dainippon Pharma- ceutical Co. Ltd. were used in this study. Results indicate that the addition of NSF 0.3 wt% together with S-194 0.01 wt% is effective in preparing UBCWM with good slurry ability and stability, based on its rheological characteristics (apparent viscosity at shear rate of 100 s-1 and yield stress at zero point of shear rate). Since the price of S-194 is expensive, the addition of CMC 0.01 wt% is also effective in preparing stable UBCWM.

INDONESIAN LOW RANK COAL RESOURCES TO WHICH UBC TECHNOLOGY IS COMMERCIALLY APPLICABLE BUKIN DAULAY; BINARKO SANTOSO; IKIN SODIKIN
Indonesian Mining Journal Vol 10, No 2 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 2 June 2007
Publisher : Puslitbang tekMIRA

Low 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.

THE OCCURRENCE OF METHANE GAS SEEPAGES IN THE UPPER KETUNGAU AREA, WEST KALIMANTAN Hermes Panggabean
Indonesian Mining Journal Vol 8, No 01 (2005): INDONESIAN MINING JOURNAL Vol. 8 No. 1 February 2005
Publisher : Puslitbang tekMIRA

Uplifting event on the Boyan Melange, that formerly known as the Semitau High in West Kalimantan has resulted in the separated Ketungau and Melawi Basins in the Late Cretaceous or Early Tertiary time. Initial stage of sedimentary deposition within the Ketungau Basin occurred in Early Eocene, depositing a fluvial conglomerate unit that subsequently changes upwards into a shallow marine and lacustrine unit of the Kantu Formation. The Eocene Kantu Formation consists of alternating dark grey and laminated carbonaceous shale, mudstone and siltstone with coal seam intercalations and the Ketungau Formation, which is composed of alternating dark grey and laminated carbonaceous shale, claystone, siltstone with coal seam intercalations inferred to be able performed as a source rocks for initial biogenic methane. On the other hand, the Oligo-Miocene Tutoop Sandstone that consists of dominantly a coarse- to fine-grained clastic unit may potentially conduct as a secondary reservoir rock for coalbed methane. Gas seepages that have been observed on surface along the tributary of Peturau and Sebuntung Rivers in the Upper Ketungau region is presumed to be derived from a coalbed methane source within the Kantu and Ketungau Formations. The methane gas is assummed to be ascending on surface through structural faults that trending NW-SE direction.

IMPROVEMENT OF LOW RANK COAL PROPERTIES BY VARIOUS UPGRADING PROCESSES DATIN F. UMAR; BUKIN DAULAY
Indonesian Mining Journal Vol 14, No 1 (2011): INDONESIAN MINING JOURNAL Vol. 14 No. 1 February 2011
Publisher : Puslitbang tekMIRA

A low rank coal from Banko, South Sumatera was used to study the properties improvement of the coal due to coal upgrading process. Various coal upgrading processes were conducted i.e. upgraded brown coal (UBC), hot water drying (HWD) and steam drying (SD). The UBC process was carried out in pilot scale with a capacity of 5 tons/day at temperature of 160°C and pressure of 0.35 MPa, while the HWD and SD pro- cesses were conducted in laboratory scale using autoclave at the temperature of 300ºC and pressure of about 12 MPa for 1 hour. The result indicates that the properties of Banko coals after the UBC, HWD and SD processes were improved. The calorific value of the upgraded coals was significantly increased in relevant to the decreasing of inherent moisture content and have better combustion characteristics than that of the raw coal. The highest calorific value can be achieved by SD process, followed by HWD and UBC processes.

SEPARATION OF WARINGIN HEAVY MINERAL SANDS FROM CENTRAL KALIMANTAN NURYADI SALEH; PRAMUSANTO PRAMUSANTO
Indonesian Mining Journal Vol 15, No 1 (2012): INDONESIAN MINING JOURNAL Vol. 15 No. 1 February 2012
Publisher : Puslitbang tekMIRA

Central Kalimantan has grown rapidly as a heavy mineral producer. Zircon is the main mineral concentrate, but other valuable heavy minerals are present. With particular interest in the upgrading of zircon and its recovery, tekMIRA’s laboratory has developed benefi ciation steps of heavy minerals to produce marketable zircon con- centrate. Using a series of concentration equipments that includes spiral concentrator, shaking table, magnetic separator and electrostatic separator; the content of zircon in the end concentrate reaches up to 65% ZrO2.

MAGNETIC SUSCEPTIBILITIES DISTRIBUTION AND ITS POSSIBLY GEOLOGICAL SIGNIFICANCE OF SUBMERGED BELITUNG GRANITE DIDA KUSNIDA; P. Astjario Astjario; B. Nirwana
Indonesian Mining Journal Vol 11, No 2 (2008): INDONESIAN MINING JOURNAL Vol. 11 No. 2 June 2008
Publisher : Puslitbang tekMIRA

An appraisal of the marine magnetic anomalies over the Belitung water provides information on the distribution of the magnetic susceptibility values. The 0.001 to 0.003 cgs unit contour values charac- terize the zone of submerged Belitung granite coincides with the zone of less than 50 nT total mag- netic anomaly contour value. Susceptibilities distribution analyses reveal a strong correlation between magnetic susceptibility and type of granites. The nature of submerged Belitung intrusive is suggested to be granitic pluton of biotite-granite that is associated with cassiterite minerals.

CARBON DIOXIDE EMISSION FACTOR ESTIMATION FROM INDONESIAN COAL Retno Damayanti; Herni Khaerunissa
Indonesian Mining Journal Vol 21, No 1 (2018): INDONESIAN MINING JOURNAL, Vol. 21 No. 1, April 2018
Publisher : Puslitbang tekMIRA

Climate change will become the priority for the air quality management. It focuses more on carbon dioxide emission. Indonesia which has power generation dominated by coal combustion is expected to develop the national CO2 emission factor. Due to the high variation in Indonesia coal rank and its growing magnitude in CO2 emission caused by the future coal-fired power plant development, the characteristic emission value becomes an important concern. The method used in this study is developed from the IPCC Guidelines for Energy. The conversion unit plays an important role in the calculation method. The result shows that the higher in C content, the lower in its CO2 emission factor. It means that coal classified as high C content or high heating value will produce low carbon dioxide emission factor. The average CO2 emission factor obtained in Indonesian coal is 99,718 kg CO2/TJ with an average value of carbon content 27.2 kg C/GJ, and NCV equal to 19.8 TJ/Gg. Coal rank is categorized as lignite to subbituminous or bituminous.

SUSCEPTIBILITY TO SPONTANEOUS COMBUSTION OF SOME INDONESIAN COALS DATIN FATIA UMAR; BINARKO SANTOSO; BUKIN DAULAY
Indonesian Mining Journal Vol 15, No 2 (2012): INDONESIAN MINING JOURNAL Vol. 15 No. 2 June 2012
Publisher : Puslitbang tekMIRA

Eight Indonesian coal samples of different moisture contents obtained from the various coalfi elds were used to study spontaneous combustion characteristics by differential thermal analysis (DTA) and crossing point temperature (CPT). Results indicate that there is no direct correlation between the spontaneous combustion test data and the individual properties of the coal samples by both DTA and CPT test methods; in this study, a preliminary conclusion can be drawn on the coal moisture content effect on spontaneous combustion. Higher moisture content coals are more susceptible to spontaneous combustion than that of lower moisture content coals. It also can be stated that the susceptibility of coal to spontaneous combustion is basically a complex. Clearly more tests are required to investigate the effect of coal properties in more detail from other Indonesian coals that have various types and ranks.

DISPLACEMENT DISTRIBUTION MODEL OF ANDESITE ROCK MASS DUE TO BLASTING ACTIVITY USING FINITE ELEMENT METHOD Agus Nugroho; Asep Bahtiar Purnama
Indonesian Mining Journal Vol 18, No 2 (2015): INDONESIAN MINING JOURNAL Vol. 18 No. 2 June 2015
Publisher : Puslitbang tekMIRA

In mining operation, blasting is the most common method to disperse rocks. Blasting process does not only minimize rock fraction, but also produce less favourable energy for its surroundings. One of less favourable energies is ground vibration. The ground vibration will affect slope stability, because it will increase the driving force of the slope to collapse. Thereby, a research is needed to understand the influence of ground vibration in the slope stability. From the level of ground vibration influence on slope stability, it can be set the limit of the blasting process to keep the slope stable. Numerical method that used in this research is finite element method. One of its advantages is to accomodate time element in its calculations. Analysis results of this method are the displacements distribution model of the rock mass in static and dynamic conditions. On the track of A-A’, rock mass displacement took place at the crest of 6.6 mm (static condition) to 8.5 mm (dynamic condition). Likewise, the track of B-B’ line of 0.4 mm to 2.5 mm and line C-C’ from 0.6 mm to 2.0 mm. The safety factor value on the floor of the lines B-B ‘and C-C’ in the dynamic conditions is 1.3. This value is quite prone, so it needs a treatment at the mine slope in order not endanger workers’ safety, mining equipment and the surrounding buildings.

ANALYSIS OF SMALL-SCALE MINING IN MINERAL AND COAL MINING LAW NUMBER 4/2009 (INPUTS FOR FORMULATION OF IMPLEMENTING REGULATION) BAMBANG YUNIANTO
Indonesian Mining Journal Vol 12, No 3 (2009): INDONESIAN MINING JOURNAL Vol. 12 No. 3 October 2009
Publisher : Puslitbang tekMIRA

Law Number 4/2009 on Mineral and Coal Mining has been approved by the DPR (the Indonesian Parlia- ment) and issued by the government on January 12, 2009. Explicitely, small-scale mining is regulated by the law and the upcoming governmental decree that regulates its implementation to be issued in 2010, followed by the ministrial decree and regional regulation. In the meantime, illegal mining activites (PETI - Pertambangan Tanpa Izin) reported everywhere in Indone- sia. It reminds us on the case of tremendous environmental disaster due to illegal gold mine in Central Kalimantan, inconventional tin mine in Bangka Belitung, illegal coal mine in South Kalimantan, and illegal mine of industrial mineral (C Group minerals) in all areas in Indonesia. The current question is will those dissaters happen again and can the Law Number 4/2009 prevents it from happening? Analysis on the law identifies that the law needs to be clarified with implementing regulations that, among others, regulate the small-scale’s mining area, small-scale mining authorization, the right and responsibility of mining authorization holder, transfer of authority to head of district, the right of mining authorization holder over the land, etc.

Page 12 of 27 | Total Record : 263

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Home Page

OAI Link

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Contact Name Bachtiar Efendi

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Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Bachtiar Efendi

Contact Email
bachtaireaje@gmail.com

Phone
-

Journal Mail Official
umar.antana@esdm.go.id

Editorial Address
-

Location
Kota bandung,

Jawa barat

INDONESIA