Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

Indonesian Mining Journal

imj
Website

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

9 10 11 12 13

IMPROVING TAPIN KAOLIN QUALITY FOR WHITE WARE CERAMIC Subari Subari; Tatang Wahyudi
Indonesian Mining Journal Vol 17, No 2 (2014): INDONESIAN MINING JOURNAL Vol. 17 No. 2 JUNE 2014
Publisher : Puslitbang tekMIRA

Tapin kaolin cannot directly be utilized as raw material for white ware ceramics due to its high Fe2O3 content. It needs upgrading its quality in terms of fulfilling the specification of white ware ceramics. Such the material requires a series of process including washing, wet sieving in magnetic ferro-filter equipment and then dissolv- ing by H2SO4 10%. Based on several parameters such as Al2O3, SiO2 and Fe2O3 contents, 2-µm particle size density, whiteness and plasticity; Tapin kaolin quality develops significantly. XRD analysis shows that the mate- rial does not have maghemite anymore. Quartz is relatively low and mafic minerals are unavailable. Referring to such quality, Tapin kaolin can be used for Parian porcelain.

REVIEWING THE PROPERTIES OF RARE EARTH ELEMENT-BEARING MINERALS, RARE EARTH ELEMENTS AND CERIUM OXIDE COMPOUND Tatang Wahyudi
Indonesian Mining Journal Vol 18, No 2 (2015): INDONESIAN MINING JOURNAL Vol. 18 No. 2 June 2015
Publisher : Puslitbang tekMIRA

Of the 17 rare earth elements (REEs), 15 belong to the chemical group called lanthanides, plus yttrium and scandium. The lanthanides consist of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium. Cerium is one of the most abundant REEs, comprises more of the earth’s crust than copper or lead. At least, there are 29 potential REE-bearing minerals. Basnasite, monazite and xenotime are among them and serve as the most exploited minerals. The REEs are mostly applied for high technology application such as computer, telecommunication, nuclear and sophisticated instruments for exploring the outer space.

STUDY OF POLYMETHACRYLATE (PMA) INFLUENCE AS DISPERSANT ON UBCWM PREPARATION DATIN F. UMAR; SUGANAL SUGANAL
Indonesian Mining Journal Vol 12, No 3 (2009): INDONESIAN MINING JOURNAL Vol. 12 No. 3 October 2009
Publisher : Puslitbang tekMIRA

Upgraded brown coal water mixture (UBCWM) is a mixture of coal resulted from upgraded brown coal (UBC) process with water in a certain ratio to form a homogeneous and stable suspension during storage, transpor- tation and combustion. UBCWM can be used as direct fuel as substitute for heavy fuel oil, particularly in industrial boilers. To obtain a UBCWM with high coal concentration and low apparent viscosity as well as good flow characteristics, the addition of additive as dispersant is needed. To study the effectiveness of polymethacrylate (PMA) as dispersant, research on the effect of PMA in the production of UBCWM needs to be carried out. The research was conducted by preparing UBCWM with the addition of PMA of 0.1, 0.3 and 0.5% and also carboxymethyl cellulose (CMC) of 0.01% as stabilizer. Preparation of UBCWM using 0.3% PMA and CMC, xantham gum (S- 60) and ransham gum (S-194) of 0.01% each was also carried out. Flow characteristic of the UBCWM was measured by using a viscometer at various shear rate. Results indicate that the addition of 0.3% PMA in the production of UBCWM is effective as dispersant. The addition of 0.5% PMA did not significantly reduce apparent viscosity. The addition of 0.3% PMA together with 0.01% CMC produces UBCWM with the highest coal concentration of 58.3% with yield stress of 23.22 Pa.

BENEFITS OF COAL STOCKPILE AT PALIMANAN TO ITS SURROUNDING COMMUNITY ENDANG SURYATI
Indonesian Mining Journal Vol 9, No 3 (2006): INDONESIAN MINING JOURNAL Vol. 09 No. 3 October 2006
Publisher : Puslitbang tekMIRA

One of the positive impacts of coal stockpiles in Palimanan is the benefits for surrounding communi- ties. Poling of stockpile developments to people in West Palimanan shows that 81.20 % people agree to have stock pile, 8.57 % disagree and the rest is abstain. Disagreement occurs as the people are afraid with dust pollution from coal stockpiles and transportation.

COMPREHENSIVE ENVIRONMENTAL EVALUATION OF BUKIT ASAM POWER PLANT COAL ASH ALI R. KURNIAWAN; NIA R. HADIJAH
Indonesian Mining Journal Vol 15, No 3 (2012): INDONESIAN MINING JOURNAL Vol. 15 No. 3 October 2012
Publisher : Puslitbang tekMIRA

Indonesian government regulation No 85 year 1999 regarding management of hazardous material states that in order to identify and to define coal ash as hazardous material or non hazardous material, the coal ash should be evaluated by characteristic and toxicity tests. In this study, the properties of coal ash sample from Bukit Asam power plant were evaluated using chemical analyses and bioassay of Lethal Concentration (LC50-96 hour) and Lethal Dose (LD50-96 hour). The chemical analyses shows that the main chemical compositions of Bukit Asam coal ash were SiO2 (60.6 %) and Al2O3 (22.8%). Bukit Asam coal ash was categorized as non toxic criteria as its LC50-96 hour value exceeded 100,000 ppm. Meanwhile, the result of LD50-96 hour shows that mortality of mice was not found in every dose given (500; 5,000; 15,000; 30,000; 50,000 mg/kg BW) for 0-96 hours of observation so it can be classified as a non hazardous material based on the Indonesian government regula- tion. The results of TCLP test reveal that the concentrations of all the heavy metals were invariably well below the permissible limits for discharge of effluents according to Indonesia regulation and US. EPA standard. Thus, it was also categorized as non hazardous material. Radiation dose of Bukit Asam coal ash was 0.41 mSv/year and it was under standard limits for human being (1 mSv/year). The mean heavy metal contents in Brassica chinensis tissues with three times cultivation were above the WHO limits level. However, the addition of 17.5% coal ash in growth media drastically decreased heavy metals content (Cu: 25.6; Pb: 66.6; Cd: 48.8 dan Cr: 8.29%) into the lowest content. The results generated from this study indicated that Bukit Asam coal ash has a vast potential for reclamation of degraded coal mining land.

K/AR DATING OF BUKIT ASAM AND BUKIT KENDI INTRUSIONS RELATED TO AGE OF MATURITY AND INCREASING OF COAL QUALITY IN TANJUNG ENIM AREA, SOUTH-SUMATERA HARRY UTOYO UTOYO
Indonesian Mining Journal Vol 10, No 3 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 3 October 2007
Publisher : Puslitbang tekMIRA

Coal bearing Muara Enim Formation is widely spread in Muara Enim, especially in Tanjung Enim District, South-Sumatera Province. Field observations display increasing maturity and quality towards Bukit Asam and Bukit Kendi intrusions. Potassium argons age analysis revealed that Bukit Asam is 0,9203 ± 0,26 million years in age and Bukit Kendi is 1,1472 ± 0,29 million years in age respectively, while Bukit Serilo displays negative age. These K/Ar ages result revealed that increasing maturity and quality of coal of the Bukit Asam and Bukit Kendi have taken place since 1,14 million years.

BIOLEACHING OF LOW GRADE NICKEL ORE USING INDIGENOUS FUNGI Sri Handayani; Suratman Suratman
Indonesian Mining Journal Vol 19, No 3 (2016): INDONESIAN MINING JOURNAL VOL. 19 NO. 3, October 2016
Publisher : Puslitbang tekMIRA

In this research, the biological leaching of nickel by indigenous fungi isolated from Indonesian limonite was studied to develop a feasible technique for microbial recovery of nickel from low grade nickel ore. XRD analyses indicated that goethite, alumina and quartz were major mineral composition of the ore. In the present study, isolated fungal strains having potential to solubilize nickel were characterized. that were identified as Aspergillus sp and Penicillium sp depending upon their colony morphology and microscopic studies. All microorganisms found were tested for organic acid production and leaching capabilities of nickel. Leaching experiments were performed in 250 ml Erlenmeyer flask at room temperature and 150 rpm agitation under aseptic conditions. It was observed that the Aspergillus sp substantially leached more nickel from limonite compared to the Penicillium sp. Nickel solubilization was related to pH decrease and organic acid excreted caused by growth of fungi in medium containing glucose as carbon source. The mechanisms of nickel extraction had been examined either directly or indirectly related to fungal activity. The presence of fungal cells seems to improve the leaching process. However, the use of higher pulp density resulted in a decrease of nickel solubilization. The maximum nickel recovery was 57% at 5% pulp density after 20 days of direct leaching by Aspergillus sp.

THE LOCAL CONTENTS OF INDONESIA’S NICKEL MINING COMPANIES Ijang Suherman; Ridwan Saleh
Indonesian Mining Journal Vol 18, No 3 (2015): INDONESIAN MINING JOURNAL Vol. 18 No. 3 October 2015
Publisher : Puslitbang tekMIRA

Analysis on the local content of Indonesia mineral mining company is intended to provide input in compiling draft regulation of the Minister of Energy and Mineral Resources regarding the use of domestic goods and services in mineral and coal mining activities, as a follow up the implementation of Government Regulation Number 23/2010 Article 88. A direct sampling survey was conducted to several nickel mining companies. The results showed that the local content for groups of goods and services at PT Vale Indonesia were 51.04% and 46.06% respectively, while at PT Antam Tbk. was 100% (groups of goods) and 99.6% (services). Based on national labour aspect, the local contents of five companies were relatively high, namely 98.63%, however, those came from province and regency areas were only 67,97% and 39.20% respectively. PT Vale Indonesia empowered 84.41% local manpowers from Sorowako area with the measured local content of nickel matte around 43.59%. The measure local content indicated that there was a big opportunity to increase the local content. Some factors that inhibited the effort to increase the use of domestic products included not smoothly the information flow, opportunities and transparency of product testing, the requirements of the Indonesia National Standard, the price preference in the tender process, tax issues, permit dangerous products as well as human resources issues.

COAL LIQUEFACTION IN INDONESIA: CURRENT STATUS AND FUTURE PROGRAMME NINING S. NINGRUM; BUKIN DAULAY
Indonesian Mining Journal Vol 10, No 1 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 1 February 2007
Publisher : Puslitbang tekMIRA

The 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.

PROCESSING OF THE GOLD ORE FROM KEDONDONG AREA, SOUTH LAMPUNG USING GRAVITY CONCENTRATION METHOD Lili Tahli; Tatang Wahyudi
Indonesian Mining Journal Vol 16, No 1 (2013): INDONESIAN MINING JOURNAL Vol. 16 No. 1 February 2013
Publisher : Puslitbang tekMIRA

Kedondong gold ores seem promising to be processed. Referring to its mineralogy characters, the ores can be treated by gravity concentration method that include Knelson concentrator, shaking table, jig and sluice box as well. Processing the gold sample coded A from Kedondong, South Lampung by Knelson concentrator increased the Au grade from 21.87 to 399.76 g/t. Its recovery was 91.57 %. The silver grade also improved from 287.83 to 3,427.12 g/t performing recovery of 49.65 %. Re-processing Knelson concentrator concentrates using shaking table enlarged the Au and silver grades to 1,199.28 and 5,430.80 g/t respectively. Both Au and Ag recoveries were around 89.84% and 47.45% respectively. Another sample, coded B, provided grade 165.80 g/t Au (from 8.93 g/t) and 3,275.05 g/t Ag (from 172.73 g/t) when processed by Knelson concentrator. A shaking table process for such a B-Knelson concentrate yielded the Au and Ag grades to 710,05 and 13.800,80 g/t respectively and also improved the Au and Ag recoveries to 85.56 and 85.17%. Concentrate Sample A has satisfied the requirement for final processing using smelting method, however, Sample B still needs more shaking table process in order to get satisfied condition for smelting process, namely the grade of gold >1,000 g/t.

Page 11 of 27 | Total Record : 263

9 10 11 12 13

Filter by Year

2005 2025

Filter By Issues

All Issue Vol 28 No 1 (2025): Indoneisan Mining Journal, April 2025 Vol 27 No 2 (2024): Indonesian Mining Journal, October 2024 Vol 27 No 1 (2024): Indonesian Mining Journal, April 2024 Vol 26 No 2 (2023): Indonesian Mining Journal, October 2023 Vol 25, No 2 (2022): INDONESIAN MINING JOURNAL, Vol. 25 No. 2, October 2022 Vol 25, No 1 (2022): INDONESIAN MINING JOURNAL, Vol. 25 No. 1, April 2022 Vol 24, No 2 (2021): INDONESIAN MINING JOURNAL, Vol. 24 No. 2, October 2021 Vol 24, No 1 (2021): INDONESIAN MINING JOURNAL, Vol. 24 No. 1, April 2021 Vol 23, No 2 (2020): INDONESIAN MINING JOURNAL, Vol. 23 No. 2, October 2020 Vol 23, No 1 (2020): INDONESIAN MINING JOURNAL, Vol. 23 No. 1, April 2020 Vol 22, No 2 (2019): INDONESIAN MINING JOURNAL, Vol. 22 No. 2, October 2019 Vol 22, No 1 (2019): INDONESIAN MINING JOURNAL, Vol. 22 No. 1, April 2019 Vol 21, No 2 (2018): INDONESIAN MINING JOURNAL, Vol. 21 No. 2, October 2018 Vol 21, No 1 (2018): INDONESIAN MINING JOURNAL, Vol. 21 No. 1, April 2018 Vol 20, No 2 (2017): INDONESIAN MINING JOURNAL VOL. 20 NO. 2 October 2017 Vol 20, No 1 (2017): INDONESIAN MINING JOURNAL VOL. 20 NO. 1 April 2017 Vol 19, No 3 (2016): INDONESIAN MINING JOURNAL VOL. 19 NO. 3, October 2016 Vol 19, No 2 (2016): INDONESIAN MINING JOURNAL VOL. 19 NO. 2 June 2016 Vol 19, No 1 (2016): INDONESIAN MINING JOURNAL Vol. 19 No. 1 February 2016 Vol 18, No 3 (2015): INDONESIAN MINING JOURNAL Vol. 18 No. 3 October 2015 Vol 18, No 2 (2015): INDONESIAN MINING JOURNAL Vol. 18 No. 2 June 2015 Vol 18, No 1 (2015): INDONESIAN MINING JOURNAL Vol. 18 No. 1 February 2015 Vol 17, No 3 (2014): INDONESIAN MINING JOURNAL Vol. 17 No. 3 OCTOBER 2014 Vol 17, No 2 (2014): INDONESIAN MINING JOURNAL Vol. 17 No. 2 JUNE 2014 Vol 17, No 1 (2014): INDONESIAN MINING JOURNAL Vol. 17 No. 1 FEBRUARY 2014 Vol 16, No 3 (2013): INDONESIAN MINING JOURNAL Vol. 16 No. 3 OCTOBER 2013 Vol 16, No 2 (2013): INDONESIAN MINING JOURNAL Vol. 16 No. 2 June 2013 Vol 16, No 1 (2013): INDONESIAN MINING JOURNAL Vol. 16 No. 1 February 2013 Vol 15, No 3 (2012): INDONESIAN MINING JOURNAL Vol. 15 No. 3 October 2012 Vol 15, No 2 (2012): INDONESIAN MINING JOURNAL Vol. 15 No. 2 June 2012 Vol 15, No 1 (2012): INDONESIAN MINING JOURNAL Vol. 15 No. 1 February 2012 Vol 14, No 3 (2011): INDONESIAN MINING JOURNAL Vol. 14 No. 3 October 2011 Vol 14, No 2 (2011): INDONESIAN MINING JOURNAL Vol. 14 No. 2 June 2011 Vol 14, No 1 (2011): INDONESIAN MINING JOURNAL Vol. 14 No. 1 February 2011 Vol 13, No 3 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 3 October 2010 Vol 13, No 2 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 2 June 2010 Vol 13, No 1 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 1 February 2010 Vol 12, No 3 (2009): INDONESIAN MINING JOURNAL Vol. 12 No. 3 October 2009 Vol 12, No 2 (2009): INDONESIAN MINING JOURNAL Vol. 12 No. 2 June 2009 Vol 12, No 1 (2009): INDONESIAN MINING JOURNAL Vol. 12 No. 1 February 2009 Vol 11, No 3 (2008): INDONESIAN MINING JOURNAL Vol. 11 No. 3 October 2008 Vol 11, No 2 (2008): INDONESIAN MINING JOURNAL Vol. 11 No. 2 June 2008 Vol 11, No 1 (2008): INDONESIAN MINING JOURNAL Vol. 11 No. 1 February 2008 Vol 10, No 3 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 3 October 2007 Vol 10, No 2 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 2 June 2007 Vol 10, No 1 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 1 February 2007 Vol 9, No 3 (2006): INDONESIAN MINING JOURNAL Vol. 09 No. 3 October 2006 Vol 9, No 2 (2006): INDONESIAN MINING JOURNAL Vol. 09 No. 2 June 2006 Vol 9, No 1 (2006): INDONESIAN MINING JOURNAL Vol. 09 No. 1 February 2006 Vol 8, No 01 (2005): INDONESIAN MINING JOURNAL Vol. 8 No. 1 February 2005 More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

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

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