Article Per Year (5 Year)
p-Index From 2020 - 2025
0.61
P-Index
This Author published in this journals
All Journal Journal of Metallurgical Engineering and Processing Technology
Untung Sukamto
Universitas Pembangunan Nasional "Veteran" Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
PENGARUH PENGGUNAAN ELEKTRODA E7016 DAN E81T1-GC TERHADAP KUAT TEKAN HASIL PENGELASAN SMAW DAN FCAW PADA MATERIAL DNVGL 450 DAN ASTM A694 STRUKTUR PLR (PIG LAUNCHER RECEIVER) PROYEK BP TORTUE SUBSEA PROJECT DI PT MCDERMOTT INDONESIA Arsyi Yogaswara; Untung Sukamto
Journal of Metallurgical Engineering and Processing Technology Vol 3, No 1 (August 2022)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v3i1.6522

Abstract

PT. McDermott Indonesia, salah satu anak perusahaan dari McDermott International, Inc., merupakan sebuah perusahaan jasa kontruksi minyak lepas pantai yang berfokuskan pada bidang fabrikasi yang merupakan salah satu perusahaan fabrikasi kontruksi lepas pantai terbesar di indonesia dimana mendalami beberapa bidang lainnya seperti project management, engineering, pengadaan material, serta instalasi lepas pantai. Tujuan penelitian ini adalah untuk mengetahui pengaruh penggunaan filler elektroda terhadap hasil kuat tekan pada setiap layer pada proses pengelasan material DNVGL 450 dan ASTM A694. Adapun metode pengujian adalah pertama mencari literatur-literatur penunjang, selanjutnya adalah pengumpulan data lapangan, kemudian menganalisis data. Adapun pengelasan dilakukan dengan metode SMAW dengan menggunakan jenis elektroda E 7016 pada bagian root pass dan metode FCAW pada bagian hot pass, fill pass dan cap pass dengan electrode jenis E81T1-GC. Metode tersebut digunakan pada sambungan material DNVGL 450 Dan ASTM A694 yang kemudian hasil pengelasannya dilakukan uji kekerasan Vickers di beberapa sisinya. Berdasarkan penelitian yang telah dilakukan diketahui bahwa penggunaan filler E81T1-GC dan elektroda E 7016 menghasilkan kekerasan logam hasil pengelasan sebesar 1.205,83 HV. Dimana berarti semakin tinggi nilai kekuatan tarik suatu material maka akan tinggi tingkat kekerasannya, namun keuletan material akan menurun (brittle). Nilai tingkat kekerasan suatu material berbanding lurus dengan kekuatan tarik dan brittleness serta berbanding terbalik dengan ductility-nya.
Analysis Effect of the Nickel Ore Reduction Process on Sulfur Fixation in Reduction Kiln #5 at PT Vale Indonesia Tbk Using Factsage Simulation Untung Sukamto; Aufa Asna Furrie Mutia Rahma
Journal of Metallurgical Engineering and Processing Technology Vol 5, No 1 (August 2024)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i1.12351

Abstract

The pyrometallurgical process which produces a product in the form of matte nickel is a nickel product that contains high sulfur so it is necessary to carry out a calcination process with the addition of sulfur and coal in the process using a reduction kiln. In order to increase the effectiveness of the process, PT Vale Indonesia Tbk's reduction kiln operations underwent several improvisations regarding the parameters used in the reduction kiln to adapt to the ore and changes to the equipment. This research aims to obtain optimal conditions for the reduction and sulfidation process to produce nickel in a reduction kiln with low fuel consumption. This research stage was carried out by making direct observations in the field as material for assessing actual conditions, then carrying out simulations using Factage software to obtain ideal conditions. Factage simulation results show an optimal calcine composition with 1.95% Ni; 25.86% Fe; 5.03%C; 63.28% Mg2Si2O6; and 3.03% Mg2SiO4 with a good calcine temperature of 717oC and federate at a kiln reduction of 767 DMT and the maximum sulfur fixation value obtained was 1.3 because sulfur and coal were added at the ideal dose, namely 9 kg/t and 35 kg/t.
Optimization Flotation Process Using Two Types of Collectors at PT. Florrea Indonesia Taufan Triandika; Untung Sukamto; Sudaryanto Sudaryanto; Yasmina Amalia; Zahna Allya Zulfa Suratinoyo
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 2 (February 2024)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i2.10897

Abstract

The tailings slurry used in this research originated from company X in Kuala Lipis, Pahang, Malaysia. The primary objective of this study is to determine the percentage of recovery, concentrate content, and Au concentration ratio in the tailings slurry. The research employs a quantitative method involving flotation testing. The flotation process involved two sets of experiments: one without the FX2 collector (tests 1 and 2) and another using both the F7042W and FX2 collectors (tests 3 and 4). dxThe research findings revealed that the percentage of Au recovery in single-collector flotation using FX2 (test 1) was 56.47%, with a concentration ratio of 19.78. In test 2, it was 52.59%, with a mass concentration ratio of 21.57. Meanwhile, the percentage of Au recovery in dual-collector flotation using F7042W and FX2 (test 3) was 68.77%, with a concentration ratio of 16.55, and in test 4, it was 69.45%, with a concentration ratio of 16.93. Based on the results of this research, it can be concluded that the flotation process employing two collectors, namely F7042W and FX2, as investigated in this study, was successful because percent recovery, concentration ratio, and Au content in the concentrate compared to single collector flotation.
Co-Authors Arsyi Yogaswara Aufa Asna Furrie Mutia Rahma Sudaryanto Sudaryanto Taufan Triandika Yasmina Amalia Zahna Allya Zulfa Suratinoyo