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Indonesian Mining Journal

imj
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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

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CARBONIZATION OF BANTEN COAL BY ADDING WATER STEAM; CHANGES ON CARBON FUNCTIONAL GROUPS AND PORE CHARACTERISTICS Anggoro T. Mursito; Atet Saepuloh; Eki N. Dida
Indonesian Mining Journal Vol 17, No 3 (2014): INDONESIAN MINING JOURNAL Vol. 17 No. 3 OCTOBER 2014
Publisher : Puslitbang tekMIRA

Experimental research and a fundamental study of carbonization of coal have been done by adding steam. The coal sample used in this study was obtained from Bayah, Banten, where the coal was mined by a small-scale underground mining. The study was carried out on a laboratory-scale of adjustable tube furnace reactor. The processes could give carbonized coal with a high calorific value (about 7,600 kcal/kg) and a high fixed carbon content (about 87 wt%). Specific surface area of carbonized products was also interesting as having for 160.5 m2/g. Specific surface area and pore distribution determined by BET techniques and also scanning electron microscope analyses were used to test for the pore and physical properties in the coal. In addition, changes in carbon functional groups and their properties were determined by Fourier Transform Infrared Spectroscopy and Raman Spectroscopy analysis of the products, upgrading process and maturation analyses.

POTENTIAL STUDY OF INDONESIA COAL FOR ADSORBED NATURAL GAS Ika Monika
Indonesian Mining Journal Vol 19, No 3 (2016): INDONESIAN MINING JOURNAL VOL. 19 NO. 3, October 2016
Publisher : Puslitbang tekMIRA

Low rank coal was used as a precursor for the preparation of adsorbed natural gas by chemical activation with KOH-NaOH mixtures. Chemical activation process is commonly used and involves two major steps, which are heating process and chemical treatment process. The experiments were used in the various of temperatures, contact times, and rasio of sample and chemical compound. The result of process was obtained of the iodine number around of 1004 mg/g and 1198 mg/g . Based on the other study, the iodine number at 1004 mg/g and 1198 mg/g have surface area between 1000 mg/g up to 1200 mg/g. These surface area provide a methane capacity between 75 mg/g up to 80 mg/g.

MARKET STUDY OF COMPOUND FERTILIZER-BASED MINERAL AT TEA PLANTATION IN BANDUNG REGENCY Ridwan Saleh; Eko Pranoto; Jafril Jafril
Indonesian Mining Journal Vol 18, No 3 (2015): INDONESIAN MINING JOURNAL Vol. 18 No. 3 October 2015
Publisher : Puslitbang tekMIRA

The study of this research is to identify the market possibility of compound mineral fertilizer in Bandung Regency. The methodology used is survey method by using analysis model of market measurements. From the analysis and discussion, it can be identified the estimate of substantial potential of fertilizer market on tea plantation in Bandung Regency of IDR 111,070,309,152 with minimum market is IDR 74,742,993,050 or 67.29% from the total potential of fertilizer market as market penetration index. Meanwhile, the remains of 32.71% is market sen- sitivity area towards fertilizer demand. The estimate of the fertilizer demand is IDR 50,391,725,914 or 67.42% to a minimum market or 45.37% to potential market, and the remains of 54.63% is the market development opportunities in the future. Meanwhile its fertilizer competitor’s are Urea, SP 36, KCL, Kieserite, NPK (sodium, phosphate and potassium), MOP (muriate of potash) and ZK (zheng and potassium). Based on the questionnaire results to 97 respondents about the characteristics and perceptions of fertilizer consumers, it is formulated mix marketing of product aspects such as the physical form of mineral fertilizers is granulees. There are 2 types of packaging, 25 kgs and 50 kgs, and its long shelf life is between 3-6 months. The selling price of end consumers is under IDR 5,000 with payment system can be used in credit. Meanwhile, promotion is carried out directly at the experimental garden, by conducting distribution through two channels, namely cooperatives and agents/ distributors. According to overall analysis results, it can be concluded that by reviewing market and competition aspects, research and development of manufacture technology of compound fertilizer-based mineral is reason- able to be continued to the next stage in the commercialization process of technology.

STUDY ON UTILIZING FLY ASH FOR CASTABLE REFRACTORY I GUSTI NGURAH ARDHA; MUCHTAR AZIZ
Indonesian Mining Journal Vol 10, No 1 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 1 February 2007
Publisher : Puslitbang tekMIRA

Fly ash could be utilized as alumina and silica sources material. It could be treated by the following processes of demagnetisation, sinterization, grinding, mixing with crushed bricks as well as fired cement to create acid based on castable refractory. Sinterization changes alumina and silica signifi- cantly into mullite. The standard measurement of pyrometric cone equivalent (PCE) is used to under- stand the temperature resistance of the studied castable refractory based fly ash. The temperature resistance seems to increase after contacting with high temperature at longer time or repeatedly until reaching its Si-Al stabilization phase.

STUDY ON ASHES OF BLENDED COAL-BIOMASS FOR CO-FIRING SYSTEM IN A COAL FIRED BOILER Ikin Sodikin; Datin Fatia Umar
Indonesian Mining Journal Vol 16, No 1 (2013): INDONESIAN MINING JOURNAL Vol. 16 No. 1 February 2013
Publisher : Puslitbang tekMIRA

Biomass and coal blend combustion or co-firing is a promising combustion technology. However, significant development work is required before large-scale implementation can be realized. Issues related to successful implementation of coal biomass co-firing mainly for power generation should be identified. This paper presents the results of the study on blended coal-biomass characterisation, particularly the ash chemical composition and ash fusion temperature to predict the slagging and fouling propensity in a coal fired boiler. The coal used in this research has a calorific value of 5,067 cal/g and the ash fusion temperature of softening temperature in oxidation condition (softening temperature-ox) is 1,228ºC, while the biomass used was baggase, straw and rice husk with the calorific value of 4,144; 3,545; 3,301 cal/g and the softening temperature-ox of 1,303; 1,420 and >1,500ºC, respectively. Experimental results for some varieties of fuel blends indicate that the proportion of 95%-5% of coal and baggase has the highest softening temperature-ox of 1,225ºC. The blend of coal and straw resulted in the highest softening temperature-ox of 1,240ºC at 95%-5%, while the blend of coal and rice husk, the highest softening temperature-ox of 1,235ºC was reached at the proportion of coal and rice husk at 90%-10%. According to the slagging and fouling index, blended coal and straw shows the best performance compared to that of blended coal either with baggase or rice husk

APPLICATION OF REVERSE FLOTATION METHOD FOR THE UPGRADING OF IRON OXIDE CONTAINED IN CALCINE LATERITE ORE PRAMUSANTO PRAMUSANTO; NURYADI SALEH; MUTA’ALIM MUTA’ALIM; YUHELDA DAHLAN; Muchtar Aziz
Indonesian Mining Journal Vol 11, No 1 (2008): INDONESIAN MINING JOURNAL Vol. 11 No. 1 February 2008
Publisher : Puslitbang tekMIRA

Reverse 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.

PRODUCTION OF SYNTHESIS GAS FROM INDONESIAN LOW RANK COALS USING FLUIDIZED BED GASIFICATION REACTOR SLAMET SUPRAPTO; NURHADI NURHADI
Indonesian Mining Journal Vol 10, No 2 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 2 June 2007
Publisher : Puslitbang tekMIRA

In relation to the objective of securing energy and raw material supplies for industries and increasing of low rank coal utilization; research on the production of synthesis gas from Indonesian coal has been carried out. Low rank coal samples and a fluidized bed reactor which was equipped with gas purification system have been used. The coal samples used were Adaro coal (sub bituminous), Mulia and Gunung Bayan (lignitic coals). Gasifying agent was also varied and consisted of oxygen, oxygen/ steam mixture and steam. Stoichiometric ratio of oxygen/carbon was kept at one half and oxygen/ steam ratio was one. The gasification temperature was kept constant at 900ºC. The composition of gas products were analyzed using a gas chromatograph with molsieve and porapak columns. The results showed that there was a good correlation between gasifying agent, coal used, quality and quantity of synthesis gas.

IMPACT OF CORPORATE SOCIAL RESPONSIBILITY (CSR) IN INDONESIA: A CASE STUDY OF GENERAL MINING INDUSTRIES Ukar Wijaya Soelistijo
Indonesian Mining Journal Vol 16, No 2 (2013): INDONESIAN MINING JOURNAL Vol. 16 No. 2 June 2013
Publisher : Puslitbang tekMIRA

Mining companies as the stakeholder of the community should implement community development (CD) as a translation of corporate social responsibility (CSR). In other words, they should involve business activities for developing humankind. The application of CSR in the general mining in Indonesia is expected to encourage min- ing company to allocate its profit for developing the local people who live around mining area. The quantitative models for evaluating the CD impact include net social gains (NSG) and net gain coefficient (NGC). The NGC shows that the value between 1 to 23% of the companies’ revenue has satisfied the local people. The values could be increased in the future to make beneficial for the regional sustainable development.

CONTROL OF ILLEGAL MINING (PETI) IN INDONESIA: POLICY AND PROGRAM UKAR W. SOELISTIJO
Indonesian Mining Journal Vol 14, No 1 (2011): INDONESIAN MINING JOURNAL Vol. 14 No. 1 February 2011
Publisher : Puslitbang tekMIRA

The activity program of illegal mining prevention and tackling which constitutes non-formal enterprise and employing job within the outlying regions becomes as part of the regional development program in which may include community development program as well. Community development in the sector of energy and mineral resources is the program of community empowerment including the community of illegal mining (PETI) is directed toward self-sustainability in the enterprise in lieu of the order of formal enterprise and employing job. The management handling of illegal mining prevention and tackling program may include the components of identification of the PETI causal factors, the system of registering and mapping PETI distribution, the system of state financial loss estimation (fiscal and non-fiscal), mapping PETI players, mapping organiza- tion related to the development and supervision of PETI including its type of job and function, system of PETI prevention, tackling system of PETI impacts, systematization of the effort of PETI prevention and tackling. Successfulness indicator of PETI prevention and tackling may include the progressive and active response of PETI players and the sustainability in terms of social-economics, human and environment as well. The implementation of PETI prevention and tackling faces various challenges and opportunities which should be anticipated. Whatever in the living circle of the people human-being is based on the philosophy of eager to live in the right track in term of law enforcement or legal. At one time, the living of PETI must be left which functions presently as temporary economic safety valve even with very high risk, while formal job has not been yet found out. Somehow, the government has moral responsibility to make the people alive by creating good quality of enterprise and job. The effort of PETI curb is expected to be able to carry out systematically, well- planned and well-directed up to the whole and entire goal is well reached for the shake of nation and state glory and prosperity.

THE EFFECT OF KCN ON GOLD ADSORPTION FROM HCl SOLUTION BY SYNTHESIZED MAGNETIC ACTIVATED CARBON COMPOSITE FROM IRON SAND RIDWAN RIDWAN
Indonesian Mining Journal Vol 15, No 1 (2012): INDONESIAN MINING JOURNAL Vol. 15 No. 1 February 2012
Publisher : Puslitbang tekMIRA

The composites of magnetic activated carbon has been successfully synthesized by utilizing the available materi- als abundant in the country such as iron sand, and other chemicals which are easily procured in local markets at low prices. The phase identifi cation using X-ray diffraction technique showed that the magnetic part is Fe3O4 with crystallite size about 30 nm. The effectiveness of gold absorption from chloride solution by activated carbon magnetic composites are close to 100% and showed very dependent on pH. An addition of KCN in to the gold chloride solution can reduce effectiveness of activated carbon to adsorb gold by up to 20%. These might be caused by the formation of Au(CN)2-, in the solution, which could change the mechanism of adsorption of gold by the activated carbon. Based on these experimental results, by using chloride it is possible to recover valuable minerals from the ore processing of mining, which are economically,as well as environment friendly and safe.

Page 8 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