Jurnal Puslitbang tekMira (Teknologi Mineral dan Batubara)
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STRATEGY TO MAXIMIZING THE USE OF COAL AND ASSOCIATED GASEOUS FUELS IN SOUTH SUMATERA BASIN
No full textSouth 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
EVALUATION OF IRON ORE FROM SOUTH KALIMANTAN AND TAILING OF PT. FREEPORT AS CATALYST PRECURSORS FOR DIRECT COAL LIQUEFACTION
No full textResearch 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
ANALYSIS OF UBC UTILIZATION IN THE EXISTING COAL POWER STATION CASE STUDY : SURALAYA POWER STATION
No full textCoal resources in Indonesia mostly (65 %) are categorized as LRC (Low Rank Coal). Currently, the Indonesian Government is encouraging to use LRC as the main source of energy in the national energy mixed policy, including the acceleration program of constructing 10,000 MW Power Plant. With the advanced technologies, such as Upgraded Brown Coal (UBC) process, LRC can be used optimally, particularly for the power plant. Suralaya Generation Business Unit (SGBU), which is the largest coal power plant in Indonesia, recently has to use lignite coal or low rank coal because the price of medium and high rank coal is too expensive. This paper conducted to identify the problems faced by SGBU in using lignite coal and to evaluate the benefit of UBC process if used in SGBU to be blended with lignite. From the evaluation, it can be concluded that UBC process will give benefit to SGBU by reducing ash pollution and give economic benefit of Rp 507 billion per year maximum
OVERBURDEN TREATMENT TECHNOLOGY IN ACID MINE DRAINAGE PREVENTION
No full textThe prevention and control of acid drainage is a major issue for mine operators at sites where sulfide minerals occur. On going risk assessment of acid drainage potential and sulfidic waste management during planning, development, operation and closure of mining developments will result in substantial environmental and economic benefits. Overburden treatment technology must be identified and imple- mented in order to minimize the production of acid mine drainage (AMD). There are many treatment technologies for AMD prevention at surface mining such as alkaline addition and special handling. Overburden analysis (OBA) refers to determination of the acidity or alkalinity producing potential. The addition of alkaline material to surface mine backfill can be an effective method of compensating for overburden and reduce the potential for acid mine drainage. Special handling methods fall into four categories: blending, encapsulation, submergence and alkaline redistribution. Special handling is most effective in conjunction with other best management practices such as alkaline addition. Moni- toring during and after mining is necessary to evaluate special handling techniques
BENEFITS OF COAL STOCKPILE AT PALIMANAN TO ITS SURROUNDING COMMUNITY
No full textOne 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
