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Isdaryanto Iskandar
Atma Jaya Catholic University of Indonesia
Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Education Environmental Science Health Professions Languange, Linguistic, Communication & Media Medicine & Pharmacology Public Health Social Sciences Other

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THE EFFECT OF DRUM SPEED ON TIME AND GRAIN SIZE RESULTS FROM THE MILLING PROCESS Sepriadi Sepriadi; Isdaryanto Iskandar; M. Ari Wijaya
International Journal of Social Science Vol. 2 No. 4: December 2022
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/ijss.v2i4.4163

Abstract

Grinding/crushing is a process of reducing the size in a crushing plant to get the desired size. The coal ball mill technique is where the ball collides with the feed on the tube wall, thus cracks will form in the feed which will result in a smaller size. Limitation of the problem in this study is the effect of speed on time and grain size resulting from the milling process, the mass of the sample used is 500 grams with grain sizes that do not pass a 10 mesh sieve, there are three types of pulley variations, namely, pulleys of 2 inch, 4 inch. , and 20 inches with a ball as a control using 10 uniform balls with a diameter of 4.58 cm
ANALYSIS THE EFFICIENCY OF BOILER 2011 UA WATER TUBE TYPE AT PT PERTAMINA RU III (PERSERO) PLAJU Dian Dwi Lestari; Isdaryanto Iskandar; Wendi Wendi
International Journal of Social Science Vol. 2 No. 4: December 2022
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/ijss.v2i4.4164

Abstract

One of the most important tools in steam production in the oil and gas industry is a boiler. Along with the increasing demand for steam, it is necessary to think about ways to increase the efficiency of the boiler. A boiler or steam boiler is a closed vessel-shaped device used to produce steam or steam. Boilers are designed to transfer heat from a combustion source. With Used the direct method (Direct Method) to calculate boiler efficiency. The pressure and temperature data of the feed water and steam is processed through the data interpolation process to obtain the enthalpy value of the feed water and steam enthalpy. Based on the calculation results obtained boiler efficiency results of 78.11%, 78.27%, and 79.75% with an average efficiency of 78.71%, and from the results of boiler efficiency calculations from the report of PT Pertamina RU III (Persero) obtained results of 89,75% in 1991. The efficiency of the above boiler has decreased by 11.04%. The decrease was caused by several factors, namely shells, valves, and instrumentation that had been eaten by age and damaged tubes.
THE TARGET ACHIEVEMENT EFFORT OF MECHANICAL AVAILABILITY AND PHYSICAL AVAILABILITY OF DOOSAN 500 LCV EXCAVATOR LOADING EQUIPMENT AT PT XYZ Kemas. Moh. Ade Isnaeni; Isdaryanto Iskandar; Yohana Pita Sibarani
International Journal of Social Science Vol. 2 No. 4: December 2022
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/ijss.v2i4.4240

Abstract

Mechanical earthmoving is all work related to digging, breaking, loosening, loading, hauling, and compacting soil or rock (overburden) using mechanical devices. Based on the results of research in April 2022 it was concluded that mechanical availability and physical availability did not meet the target plan, where the mechanical availability value in April was 74% and the physical availability value in April was 79%. While the value to be achieved at PT XYZ on mechanical availability is 83% and physical availability is 90%. One of the efforts for MA and PA to achieve the target plan is to map actual conditions and then make a work plan.
THE PIT DESIGN PLANNING AND PLANNING RESULT EVALUATION OF OVERBURDEN FRONT FROM WEST TO EAST USING MINESCAPE VERSION 5.7 SOFTWARE AT PT XYZ Roby Cahyadi; Isdaryanto Iskandar; Diansah Aprianto
International Journal of Social Science Vol. 2 No. 4: December 2022
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/ijss.v2i4.4241

Abstract

PT XYZ is a private company managed by foreign company was engaged in coal mining sector located in Muara Enim, South Sumatera. This company conducts open mining system or surface mining. The overburden volume production calculation applied by PT XYZ used software that is Minescape 5.7. Software. The objectives of this research was creating a front design of overburden from west to cast with elevation of #10 to 0 and the calculation of cut and fill volume of overburden planning and the joint result used Minescape 57. Software, comparing the amount of cut and fills volume and determining the factors causing the difference of the overburden volume calculation using Minescape 5.7. Software. The method used was material stockpiling method and disposal stability became the author's basis to recommend a disposal in pit which can accommodate safe product to be implemented in the field. Based on the calculation results using Minescape 5.7. Software in May, the obtained overburden volume was 587.36 BCM. From the analysis results related to the Minescape 5.7. Software calculation comparison between the progress and the joint of the cut was 428.62 and the fill was 20.48.
THE EFFECT OF UTILIZATION OF ACTIVATED CARBON FROM RUBBER SEED SHELLS AND COAGULANTS FROM KEPOK BANANA PEELS IN WELL WATER OF KENTEN LAUT RESIDENCE TOWARDS PARAMETER Ph, TSS, TDS AND TURBIDITY Amiliza Miarti; Isdaryanto Iskandar
International Journal of Social Science Vol. 2 No. 4: December 2022
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/ijss.v2i4.4242

Abstract

Water is basic necessity in our daily life. But in fact, the water sources used by surrounding communities in Kenten Laut residence’s wells are still murky and still do not meet the standard specifications for drinking water. This study aims to determine the effectiveness of using activated carbon from rubber shells and optimal coagulation from kepok banana peels in improving the water quality of residence’s wells by using the parameters of pH, TSS, TDS and turbidity. Based on the research which has been conducted, the optimum effectiveness that could be used to increase pH value with dose of 0.1 grams was the coagulants from kepok banana peels of 7.08, while the activated carbon results were close to alkaline. Meanwhile, for other parameters, the optimum effectiveness for improving the water is the dose of 0.5 grams of rubber seed shell activated carbon, it could reduce TSS up to 90.66%, TDS 91.04% and turbidity 97.37%. Meanwhile, by using coagulant from kepok banana peels the effectiveness was only TSS 73.33%, TDS 40.29% and turbidity 68.86%.
Co-Authors Amiliza Miarti Daniel Chandra Dian Dwi Lestari Diansah Aprianto Juan Floryan Kemas. Moh. Ade Isnaeni Kenneth Verdian Kornelia Agnes Juliati M. Ari Wijaya Palka Adripta Roby Cahyadi Sepriadi Sepriadi Taufik Arrahman Wendi Wendi Yohana Pita Sibarani