Article Per Year (5 Year)
p-Index From 2020 - 2025
0.92
P-Index
This Author published in this journals
All Journal TAMBANG Jurnal Teknologi Pertambangan KURVATEK Journal of Metallurgical Engineering and Processing Technology Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Untung Sukamto, Untung
Prodi Teknik Pertambangan, Fakultas Teknologi Mineral, UPN “Veteran” Yogyakarta, Jl. SWK 104 (Lingkar Utara), Yogyakarta 55283 Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
ANALISIS KEBERHASILAN PRODUKTIVITAS JIG TERTIER PADA PROSES KONSENTRASI BIJIH TIMAH DI KAPAL KERUK BEMBAN PT. KOBA TIN, KOBA, BANGKA TENGAH Sukamto, Untung; Rosita, Alfitri
PROMINE Vol 2, No 1 (2014): PROMINE
Publisher : Jurusan Teknik Pertambangan FT UBB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5.687 KB)

Abstract

Criteria of Jig Tertier’s productivity success, namely grade, recovery, and ratio of concentration in order to qualify the target of the company, which  is having 30-40% Sn grade and recovery ≥ 97%.Regarding the initial condition of jig tertier in the concentrating process on the dredge, there is often a deadlock in the screening due to the clogging of gravels. There is also a lot of ragging whose shape and relative density do not match. The length and the frequency of the stroke is also too fast, leaving the soft tin minerals with no chance to precipitate, thus it is carried away into tailing. This problem  leads  the  researcher  to  make  a  study  that  aims  to  enhance  the performance of jig, so that the company can accomplish its target, by doing an experiment of change in variables of jig tertier, which are length and frequency of the  stroke  as  well  as  the  maintenance  of  the  ragging  and  the  screen.  Other variables are assumed constant.Initially, the length of the stroke in jig tertier port is 4-5 mm, and in jig tertier starboard 5-5 mm. The frequency of jig tertier port and jig tertier starboard is around180-190 spm. The grade and recovery in jig tertier port are not meeting the desired target which is 24,25% grade with 76,6% recovery. The grade in Jig Tertier Starboard is 39,13% with 46,0% recovery.An experiment is done by altering the stroke length variable into 7-8 mm in jig tertier port, and 7-7 mm in starboard, with port’s or starboard’s frequency of 160-180 spm. The maintenance in ragging is done by selecting the size and weight of the hematite stones ragging from 4,2-4,5. The experiment resulted in an improvement in jig tertier port’s grade, which increased to 42.18% Sn with 98.2% recovery. The grade in jig tertier starboard turned into 45,49% Sn with 98.1% recovery, thus the company has achieved the desired target. Key Word : Concentration, Jig, Grade, Ratio of Concentration and Recovery
Studi Eksperimental Recovery Timah (Sn) dari Tailing High Tension Roll Separation Menggunakan Shaking Table: Pengaruh Laju Aliran Air Mirahati, Riria Zendy; Wulandari, Nurul; Mardhatila, Fitri Ayu; Sukamto, Untung; Putri, Frideni Yushandiana; Labib, Hazim Haikal; Faturrahman, M. Hafiz
Jurnal Teknologi Pertambangan Vol. 11 No. 1 (2025): Juni 2025
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jtp.v11i1.14957

Abstract

Pemanfaatan kembali tailing dari proses pengolahan mineral merupakan langkah strategis dalam mendukung kegiatan pertambangan yang berkelanjutan dan ramah lingkungan. Salah satu jenis tailing yang masih mengandung mineral berharga adalah tailing hasil proses High Tension Roll Separation (HTRS) yang digunakan dalam pemisahan zirkon kadar rendah. Tailing ini diketahui masih menyimpan kandungan timah (Sn) dalam jumlah yang cukup signifikan. Oleh karena itu, diperlukan metode yang tepat untuk mengekstraksi kembali mineral berharga tersebut. Penelitian ini bertujuan untuk mengetahui pengaruh variasi laju aliran airterhadap recovery timah dari tailing HTRS menggunakan metode konsentrasi gravitasi dengan alat shaking table. Penelitian dilakukan secara eksperimental di laboratorium menggunakan sampel tailing berukuran -50 mesh dengan massa 15.000 gram pada setiap perlakuan. Variabel bebas yang digunakan adalah laju aliran air dengan tiga variasi, yaitu 0,90 m/s, 0,95 m/s, dan 1,00 m/s. Sementara itu, variabel terikatnya adalah nilai recovery timah (Sn) dalam satuan persen. Parameter kemiringan deck dijaga tetap sebesar 1,2° untuk menjaga kestabilan proses pemisahan. Setelah pemisahan, hasil konsentrat dianalisis menggunakan alat X-Ray Fluorescence (XRF) Shotgun. Data yang diperoleh digunakan untuk menghitung recovery dan dianalisis secara statistik. Hasil penelitian menunjukkan bahwa laju aliran air memengaruhi nilai recovery. Recovery tertinggi dicapai pada laju 1,00 m/s sebesar 49,96%, sedangkan recovery terendah terjadi pada laju 0,95 m/s sebesar41,57%. Nilai kadar Sn tertinggi dalam konsentrat juga tercatat pada laju 1,00 m/s. Analisis korelasi menunjukkan adanya hubungan positif yang sangat lemah antara laju aliran air dan recovery Sn. Temuan ini menunjukkan bahwa shaking table masih efektif digunakan dalam proses recovery timah dari tailing, dengan pengaturan laju air yang tepat untuk menghasilkan hasil yang optimal. 
Optimization Flotation Process Using Two Types of Collectors at PT. Florrea Indonesia Triandika, Taufan; Sukamto, Untung; Sudaryanto, Sudaryanto; Amalia, Yasmina; Allya Zulfa Suratinoyo, Zahna
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.
Analysis Effect of the Nickel Ore Reduction Process on Sulfur Fixation in Reduction Kiln #5 at PT Vale Indonesia Tbk Using Factsage Simulation Sukamto, Untung; Furrie Mutia Rahma, Aufa Asna
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.
LIMITTING REDUCTION RATIO SEBAGAI BATAS REDUKSI UKURAN MATERIAL PADA SINGLE TOGGLE JAW CRUSHER Sumarjono, Erry; Budi, M. Sri Prasetyo; Sukamto, Untung
KURVATEK Vol 10 No 1 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i1.5723

Abstract

Reduction Ratio (RR) can be used to estimate the size of product that can be produced by a crusher. The reduction ratio can be calculated in several ways. One calculation that can be done is calculating the Limitting Reduction Ratio (LRR). Limiting Reduction Ratio is a comparison between the largest feed size and the largest product size. This research aims to calculate the Limiting Reduction Ratio in clay stone crushing operations for 30 samples, which was carried out on a laboratory scale, using a single toggle jaw crusher type crusher. Crushed products are separated by hand sieving sizes +4#, 10#, 20#, 40#, 60#,100#, 200#. The research results show that the percentage of crushed products produced is still found in the largest sieve size, namely 4#, with an average amount of 52.33%. The largest feed size ranges from 24 mm to 27 mm and the largest product size ranges from 4 mm to 6 mm. The relationship between total feed weight and total product weight can be expressed in the equation Y = 0.5229 X and R2 = 0.9228, while the relationship between the largest feed size and the largest product size is expressed in the equation Y = 0.2044 X and R2 = 0.9761. The calculation of the limiting reduction ratio ranges from 4.2 to 6.8, with an average value of 5.02. Keywords: Crushing, Jaw Crusher, Mineral Processing, Reduction Ratio, Reduksi
Losses Material Crushing Products Single Toggle Jaw Crusher sumarjono, erry; Sukamto, Untung; Kadiman, Sugiarto
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Losses material or loss of material could occur in the mineral processing or mineral dressing, due to the crushing of excavated materials (material) resulting from mining in crushing or grinding. The amount of product produced using crushing equipment can always be smaller than the amount of feed inserted. This laboratory scale research was carried out to calculate the percentage of material loss. The research was carried out using a single toggle type jaw crusher. The feed that is put into the jaw crusher is 30 rock samples, the weight of each rock sample is weighed, expressed as the weight of the feed. Weighing is also carried out on the crushing results, expressed as product weight. Calculation of material loss is obtained from the difference between feed weight and product weight. The loss factor is calculated based on the difference in the weight of the feed and product compared to the weight of the feed. The percentage of material loss is calculated by reducing the weight of the product by the weight of the feed multiplied by 100%. The results of the research show that based on the average calculation the loss factor = 0.067320429 and the percentage of material loss = 6.732042886%. The conclusion obtained based on research on 30 data shows that the percentage of material loss in the rock crushing process using a single toggle jaw crusher is below 10%.
Co-Authors Alfitri Rosita, Alfitri Allya Zulfa Suratinoyo, Zahna Budi, M. Sri Prasetyo Erry Sumarjono Faturrahman, M. Hafiz Furrie Mutia Rahma, Aufa Asna Kadiman, Sugiarto Labib, Hazim Haikal Mardhatila, Fitri Ayu Mirahati, Riria Zendy NURUL WULANDARI Putri, Frideni Yushandiana SUDARYANTO SUDARYANTO Triandika, Taufan Yasmina Amalia, Yasmina