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All Journal TAMBANG PROMINE Chemistry Indonesian Journal of Chemical Research LOGISTA - Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Abdi: Media Pengabdian Kepada Masyarakat MINERAL

Janiar Pitulima

Jurusan Teknik Pertambangan, Universitas Bangka Belitung

Author-ID : 455849

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Other

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Pengaruh Penambahan NaOH dan Ca(OH)2 Terhadap Penurunan Kadar Logam Berat (Fe) di Kolong Tambang 23 Desa Kimhin Kecamatan Sungailiat Elgatania Dwi Apriastuti; Mardiah Mardiah; Janiar Pitulima
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Tin mining activity causes a lot of opening pit known as kolong in Bangka Island. Ecologically, kolong has function as retention reservoir that contain harmful acid water. Tin mining ex-pit potentially causes environment effects especially the quality and quantity of water contained heavy metal. One of kolong in Tambang 23 Kimhin Village of Sungailiat subdistrict contain a quite high of heavy metal of Fe in amount 2.18 mg/L that tested from the result of testing of Health Official Laboratorium of Bangka Regency. Therefore, this research conducted to decrease metal grade in the water kolong. This research focused based on metal grade of Fe value. Analysis conducted by counting the decrease of percentage of Fe metal grade. The method used in lowering metal grade was precipitation method using NaOH and Ca(OH)2 solution. Metal grade analysis used spectrophotometer. The aim of this research was to determine the influence of solution concentration, precipitation time and solution influence of NaOH and Ca(OH)2 in lowering Fe grade. The result of research showed the influence of adding precipitation of NaOH and Ca(OH)2 with the precipitation time. The longer time of precitipation, the bigger percentage of lowering Fe metal. The biggest percentage of Fe metal grade was on concentration of NaOH 6% and Ca(OH)2 3% with the lowering percentage of 88.99% and 96.33% respectively. The optimum time to precipitate Fe metal was in 60 minute. Based on research result showed that precitipation of NaOH better than Ca(OH)2.

Perencanaan Tambang Secara Manual dan Software Micromine Sebagai Pembanding Pada Kapal Keruk 21 Singkep 1 Di Laut Air Kantung, PT Timah (Persero) Tbk Elisa Elisa; Irvani Irvani; Janiar Pitulima
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Dredger 21 Singkep 1 is a mean of production offshore tin mining owned PT Timah (Persero) Tbk, which in 2016 is located in the Air Kantung Sea. Before the implementation of the necessary mining mine planning as a guide to provide an overview of work in the field conditions. Mine planning studies considering the economical extraction and analysis of the operations of dredgers by applying two ways; manually which reserves calculations using the Poligon Methods (Area Of Influence) with sea drilling spacing of 100 × 100 m and assisted Software Micromine as a comparasion. Based in the calculation, the value of the break even production of 42 tonnes ore/month and the break even grade of 0,23 kg/m3. Mining in May to October 2017 to continue the old location to the position of excavation to the northwest. Results obtained Idh manual production planning (Content Calculated) 1.263.980 m3, TDH (Tin Calculated) 0,292 kg/m3 and PDH (Production Calculated) 369,69 tonnes, while the calculation of Micromine obtained Idh 1.271.379 m3, Tdh 0,273 kg/m3 and Pdh 347 tonnes. Fault tolerance value 0,58%. Repair manual planning the excavation efficiency is obtained Idh 1.283.847 m3 increased 1,55%, Tdh 0,327 kg/m3 increased 10,7% and Pdh 409,37 tonnes increased 11,85%. Based on the analysis of drill profiles, the most effective method of extracting using combination system, where the overburden excavation with long face method and leaded soil with short face method.

Evaluasi Titik Impas Biaya Peledakan Batu Granit Bulan Januari 2017 Melalui Perbaikan Metode Peledakan Pada PT Vitrama Properti Di Desa Air Mesu Kabupaten Bangka Tengah Hendra Susanto; E.P.S.B Taman Tono; Janiar Pitulima
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Vitrama Properti is one of the private companies that run on the mining field, namely the mining of natural resources of granites. In this study, the researcher observes the cost of explosion used by PT Vitrama Properti in its mining of granites. According to the economic analysis, to determine the cost of explosion need to count on the breakeven point. The method employed in this research is to analyze the breakeven point. Breakeven point is a calculation used to know the volume of explosion rate so that the total income and total cost will be at the breakeven point. The data collection is conducted from December 2016 to February 2017, including the data of drilling cost, explosion usage cost, the salary of employees and contract employees, excavators and dump trucks fuel cost, equipment ownership cost, and the specification of explosion tools and equipment. The result of the data analysis shows that the total explosion cost paid by PT Vitrama Properti in January 2017 is Rp.1,041,936,063,00 and the total income earned is Rp.1,287,134,940.00, so the total profit made is Rp.245,198,976.00. Whereas, the breakeven point of PT Vitrama Properti in January 2017 is on the explosion volume rate of 23,109.08 m3 with the total earning and total cost is Rp.841,170,781.00. One of the significant factors to reduce the cost of explosion is to improve the geometry of explosion and to make the effective use of ANFO. After implementing the improved geometry of the explosion, the breakeven point is also improved from the volume rate of 23,109.08 m3 to the volume rate of 21,090.35 m3. Also, to increase the income from the explosion process can be done by increasing the sale of granite from the explosion (boulder) into 7,072.17 m3 with the total income of Rp.257,426,988.00, as well as by increasing the total product sale of 24,752.59 m3 with the total income obtained of Rp.900,994,458.00.

Evaluasi Produktivitas Alat Gali-Muat dan Alat Angkut untuk Pengupasan Tanah Penutup Bulan Agustus 2016 Di Pit 3 Timur Penambangan Banko Barat PT Bukit Asam (Persero) Tbk Muhammad Arrofah; Mardiah Mardiah; Janiar Pitulima
MINERAL Vol 2 No 2 (2017): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

PT Bukit Asam (Persero), Tbk is a state-owned enterprise that operates in mining industry, particularly coal mining that has 4 main mining location. One of them is an east pit 3 of Banko Barat mining managed by PT SumberMitra Jaya. Mining process is exploited by using open pit methode which excavate overburden material using load-haulage equipment and transport system. Load-haulage equipments are used excavate, and to load overburden material, and transport system are used to carry overburden in disposal. This whole processes known as mechanical mining system. However, the actual condition of load-haulage productivity was only 84.56 % compared to determined target that caused overburden remova volume not to be achieved in amount of 15.44 %. Otherwise, evaluation of factors that affected performance of load-haulage equipment and transport system need to be conducted. Evaluation was conducted by calculating productivity, work efficiency, match factor of equipment, and load–haulage geometry. The data collected was cycle time, effective utilization, kind of material overburden and load-haulage geometry to get the value. Then, the collected data processed by using formula of mechanical soil movement and analysed based on literatures that related to the problem. The causing factors of load-haulage productivity in not achievement of determined target after evaluation conducted was low of work efficiency, amount of delay time in the amount of 1.19 minute caused by narrow transport roads, and low of match factor of equitment in the amount of 0.92. The alternatives that can be carried out to increase load-haulage productivity is increasing effective work time and widing transport road. Effective work time of transport system should be leveled up from 15.237 hour to 15.682 hour in fleet I and fleet II, and in fleet III should be leveled up from 14.122 hour to 14.567 hour. Thus, the total of transport system productivity will increase to 576,503.83 bcm/month from 486,247.59 bcm/month.

Kajian Teknis Alat Gali-Muat dan Alat Angkut Pada Pencapaian Pengupasan Overburden 1.120.000 BCM di Pit Taman Tambang Air Laya Bulan September 2016 PT Bukit Asam (Persero) Tbk Irwan Edel Frudis; Mardiah Mardiah; Janiar Pitulima
MINERAL Vol 3 No 1 (2018): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

In the layer of overburden stripping activities in Pit Taman attainment production amounted about 82% of the production target set in the amount of 925,187.2 BCM of production target of 1,120,000 BCM. This is due to the high resistance factor affecting work efficiency so that production is produced by means of unloading and transportation have not been able to achieve the production target. The data obtained in the field in the form of a data cycle time tools obtained from the calculation of the time distribution of each trencher-fit to perform the excavation, swing content, swing empty and loading and conveyance maneuvering, loading, road to disposal, dumping and back to front as well as the calculation of effective working hours will do the calculation of the amount of productivity. After calculating the theoretically obtained by 1,656,454.08 BCM of overburden production for excavator-unloading and BCM 1,405,890.9 for conveyance. To get productivity achieve production targets then do the optimization tools work plan is to optimize. Optimizing plan working hours adjustment tools and repair equipment capacity are obtained overburden production amounted to 1,914,890.2 BCM. As for after the technical review of the excavator-unloading and conveyance in stripping overburden at Pit Taman in September 2016 on the calculation of production trencher-load transports that have been implemented should only use 3 units of excavator-unloading is 3 units of PC Komatsu 2000 for with the use of 3 units with improvements and performance optimization tools as well as the factors that influence has reached its production target of 1,670,167.71 BCM and for the use of conveyances using Komatsu HD 785 20 units with a production target of 1,615,712.8 BCM.

PENGARUH VARIABEL SHAKING TABLE TERHADAP KADAR DAN RECOVERY PENCUCIAN BIJIH TIMAH PRIMER PT MENARA CIPTA MULIA KABUPATEN BELITUN VARIABEL SHAKING TABLE TERHADAP KADAR DAN RECOVERY PENCUCIAN BIJIH TIMAH PRIMER PT MENARA CIPTA MULIA KABUPATEN BELITUNG TIMUR Dihan Fauzan; Janiar Pitulima; Delita Ega Andini
MINERAL Vol 3 No 2 (2018): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The process of washing primary tin ore at PT Menara Cipta Mulia in the final stage uses gravity concentration method to separate mineral cassiterite from its impurity minerals. The separation process uses a shaking table with 2 stages of washing to minimize the waste of valuable minerals (losses). In the initial stages of washing, the primary shaking table and finishing stages use secondary shaking table. Currently the use of shaking tables at PT MCM does not have default standards in operation and still uses trial and error. Reseach method by varying the slope variables of the table in the primary tool shaking table 4 variations, namely 0.95°, 1.27°, 1.59°, 1.91° and washing water velocity of 3 variations, namely 0.6 m/s, 0.9 m/s, 1.2 m/s while on secondary shaking table tools 3 variations are slope that is 0.64°, 0.95°, 1.27° and washing water velocity of 3 variations is 0.6 m/s, 0.9 m/s, 1.2 m/s with this variable variation, the sample is obtained for the grade test and recovery calculation. The optimal results on the primary shaking table were at 1.27 degrees with an average recovery of 56.43% and grade Sn of 51.28%. Optimal water velocity is 0.9 m/s with an average recovery of 50.97% and grade Sn of 52.19%. While the optimal results for the secondary shaking table are at a slope of 0.64 degrees with recovery averaging 40.88% and grade of 71.64% with an optimal water velocity is 0.9 m/s with an average recovery of 32.24% with concentrate grade Sn 72.18%. The greater the value of the slope angle and water velocity be used, the smaller the recovery of washing tin ore produced but the smaller the recovery value indicates the higher the concentration of the resulting concentrate.

Pengaruh Fragmentasi Hasil Peledakan Batugranit Terhadap Produktivitas Hopper Crusher Di PT Bumi Warna Agung Perkasa Desa Air Mesu Kabupaten Bangka Tengah Bobby Bagaskara; Janiar Pitulima; Delita Ega Andini
MINERAL Vol 3 No 2 (2018): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The destroyed process or to split the rock with blasted system have effective value and good economic compared with mechanical tools method. Blasted activity effective become is anothere standard the success of activity loading processing to influence achievement targets of mining productivity. This research aim to increasing the productivity hopper crusher baited rate and minimize total percentage of boulder, so that material reduction activity in hopper crusher become was more effective. The study was on 14 blasted is project from PT Bumiwarna Agung Perkasa. Data this research consist of geometry, blasted fragmentation, cycle time loading hopper. This research used method with geometry an estimates used R.L.Ash method with fragmentation analysis used Kuz-Ram and image analysis. From analysis data there is actual fragmentation 74.680% base on Kuz-Ram and 64.942% base on image analysis with an actual boulder total Kuz-Ram 25.320 % and 35.057% base on image analysis, with result the average time reduction 8.21 minute and an average productivity 131.80 m3/hour. It is minimize total percentage of boulder, needed to revise blasted geometry based on R.L. Ash theory with reduction boulder size >80 cm by 12.042% with keep the target volume production 40026.8 BCM. It is productivity hopper crusher may work better.

Evaluasi Kualitas Batubara dari Front Penambangan Hingga Stockpile di Pit 1 Banko Barat PT Bukit Asam Tbk Tanjung Enim Inda Pratama Putri; Janiar Pitulima; Mardiah Mardiah
MINERAL Vol 4 No 1 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Mining Pit 1 Banko Barat in Bukit Asam is a mining location that used open pit system of mining. Coal quality is an important part of the mining industry, because it's related directly to coal marketing. Coal sampling test process which determine quality prove that quality in front mining and stockpile is decreasing from recent month with 4903 Kcal/kg. The decreasing in quality will also result in price reduction. Based on that condition, evaluation of coal sampling quality test result needs to be done to discover the cause of quality decreasing, so that various efforts can be made to increase quality to match the price standard. Research method using proximate and ultimate analysis for coal quality. There are 20 coal samples used in the front, 24 samples in stockpile and 8 samples in temporary stockpile. Coal quality in front mining has 28.24% total moisture, 13.8% inherent moisture, 2.11% ash content, 33.81% volatile matter, 35.98% fixed carbon, 0.42% total sulphur and 4,987.5 kcal/kg. Coal quality in stockpile has 28.35% total moisture, 14.26% inherent moisture, 3.73% ash content, 33.87% volatile matter, 34.09% fixed carbon, 0.41% total sulphur and 4,908.5 kcal/kg. Irrelevance factor is caused by water puddle, mining process, coal cumulation that stays too long in temporary stockpile and spontaneous combustion. Efforts that can be done to handle irregularities are drainage system and pump additions, mining process optimization, FIFO management system implementation and spontaneous combustion handling.

Kajian Produktivitas Alat Gali Muat dan Alat Angkut dari Pit 1 untuk Pengangkutan Batu Granit di PT Aditya Buana Inter Desa Jurung Kecamatan Merawang Eko Eko Pryatna Gaol; Janiar Pitulima; Alfitri Rosita
MINERAL Vol 4 No 1 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

The mining industry sector is an important sector for Indonesia's development (Prasetya and Ernest, 2013). PT Aditya Buana Inter, hereinafter abbreviated as PT ABI, is one of the mining companies that utilize natural resources in the form of rock mining (article 34) Law No. 4 (2009), in this case granite and began mining activities in 2002. The main activities in granite mining consist of stripping the overburden, drilling, blasting, dismantling, loading and transporting to the processing unit (crushing plant) with the distance from the mining front to the processing unit namely ± 1.7 km. Area of 40 Ha Mining Business Permit is located in Jurung village. The granite mining activities carried out by PT ABI are carried out with an open-pit mining system. Based on the PT ABI work plan for the production target of transporting granite in January 2018 is 13,000 BCM, while the actual production is only 9,085 BCM with unattainable 3,915 BCM. The percentage of granite stone production reaches 69% of the work plan target. The cause of not achieving the production target value set by PT ABI can be influenced by several factors, one of which is the ineffective amount of work time wasted. ncreased work efficiency is done by making improvements to avoidable obstacles so that the working efficiency of the loading and excavating tool has increased from 75% to 78% and transportation equipment from 70% to 77.6% with production to 11,139 BCM. Addition of transportation equipment for 1 unit match factor so that it reaches the target of 13,000 BCM

Pengaruh Kecepatan Aliran dan Debit Aliran Terhadap Peningkatan Perolehan Konsentrat Bijih Timah Dalam Tailing Pada Alat Secondary Lobby Box Skala Laboratorium E.P.S.B Taman Tono; Dede Seiawan; Janiar Pitulima
MINERAL Vol 4 No 2 (2019): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Tailings are the result of the process of mining or processing mineral ore which is considered tohave no economic value. The g in the tailings as evidence that there are losses of cassiterite mineralsthat are also wasted is still of economic value. To reduce losses of cassiterite minerals in tailings, thetool used is the secondary lobby box. The washing of tin tailings was carried out 6 times including theflowrate and the speed of the water flow given differently affected by the opening of the water faucetthat forms the angle of partition on the secondary lobby box. Each of these angles is 15⁰, 30⁰, 45⁰ ,60⁰, 75⁰, and 90⁰. From each experiment a bait was used in the form of tailings with a weight of 5 kgeach (0.47% Sn). At faucet position 15⁰ flow rate of 20.5 l/minute and water flow rate of 0.017 m/secproduced 1.19% Sn and recovery at 76%, position 30⁰ flow rate of 23.5 l/minute and water flow rate of0.020 m/sec produced 1.22% Sn and recovery at 73%, position 45⁰ flow rate of 26 l/minute and waterflow rate of 0.022 m/sec produced 1.25% Sn and recovery at 68%, position 60⁰ flow rate of 28.7l/minute and water flow rate of 0.025 m/sec produced 1.28% Sn and recovery at 65%, position 75⁰flow rate of 32.6 l/minute and water flow rate of 0.028 m/sec produced 1.30% Sn and recovery at53%, and position 90⁰ flow rate of 41 l/min and water flow rate of 0.035 m/sec produced 2.26% Sn andrecovery at 50%. The highest concentration of 2.26% Sn and the desired recovery in the tailingsseparation process is the lowest recovery of 50% in the 90⁰ faucet position. This shows that theprocess of separating products in the form of tailings has increased significantly from the feed contentof 0.47% Sn to 2.26% Sn and transforming tailings products into economically valuable ores.

Co-Authors Alfitri Rosita Alldino Hernanto Armansyah Putra Sinulingga Bobby Bagaskara Dede Seiawan Delita Ega Andini Dihan Fauzan E.P.S.B Taman Tono Eko Eko Pryatna Gaol Elgatania Dwi Apriastuti Elisa Elisa EPSB Taman Tono Evrantino Insani Sitohang Firmansyah Firmansyah Franto Franto Haslen Oktarianty Haslen Oktarianty Hendra Susanto Inda Pratama Putri Ines Yuana Irvani, Irvani Irwan Edel Frudis Mardiah Mardiah Mardiah Mardiah Maria Jeane Inggrid Muhammad Arrofah Muhammad Rizki Pratama Novrida Siregar Rahmad Tanjung Rezky Dwi Aditya Ristika O. Asriza Ristika Oktavia Asriza Robby Gus Mahardika Selvira Oktaviani Verry Andre Fabiani Yuli Daryono

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