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SUDARYANTO SUDARYANTO
Program Studi Administrasi Negara Universitas Lancang Kuning
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Journal : Journal of Metallurgical Engineering and Processing Technology

 1 
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.
Effect of Application Rate on Gold Ore Extraction Process with Column Test Method at PT J Resources Bolaang Mongondow, North Sulawesi Rangan, Frederico Espinoza; Sudaryanto, Sudaryanto
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.v5i1.12385

Abstract

PT J Resouces Bolaang Mongondow is engaged in gold processing with the heap leach process using the dynamic cell method. However, currently there will be a change to the static cell method so that it will affect the operational strategy including the application rate. Therefore, in this research, testwork was carried out to determine the best application rate to be used in the static cell process, studying the effect of application rate on leaching kinetics, percent gold extraction value, and cyanide consumption. The research stages include preparation and testing of head assay samples, leaching, and preparation and testing of tailings samples using the column test method. The application rate variations used were 20 L/m2 /h, a combination of 20 & 10 L/m2 /h, and 10 L/m2 /h. Pregnant leach solution obtained per day is checked for pH, free cyanide, and metal content analysis for the calculation of the percent extraction by back calculated. The results showed that the application rate of 20 L/m2 /h and the combination of 20 & 10 L/m2 /h had faster primary leaching kinetics than the application rate of 10 L/m2 /h. Analysis of the percent extraction of application rate 10 L/m2 /h has the highest percent extraction of 89% (0.2081 mg/L gold). Application rate also has an impact on cyanide consumption, where the application rate of 20 L/m2 /h has the highest cyanide consumption of 0.13 g/t. Meanwhile, the application rate combination of 20 & 10 L/m2 /h and 10 L/m2 /h had cyanide consumption of 0.081 g/t and 0.067 g/t, respectively. From the results, it is concluded that the best application rate is the combination of 20 & 10 L/m2 /h, judging from the leaching kinetics factor and the percent extraction obtained. On the other hand, the volume of solution produced is also less so that it can minimize the occurrence of landslides on the leach pad
A Review of Reforming Processes in the Railway Manufacturing Industry : Case Study of PT. Industri Kereta Api (Persero) Kristanta, Stephanus Yosi; Setyani, Atik; Sudaryanto, Sudaryanto; Syukron, Muhammad; Santoso, Muji
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.v5i1.12772

Abstract

The railway manufacturing industry is critical for developing efficient and sustainable mass transportation systems. PT. Industri Kereta Api (Persero) (PT. INKA), a leading company in Indonesia, faces significant challenges due to deformation caused by residual stress during welding processes. This study reviews various reforming techniques implemented by PT. INKA to address these issues. The objectives include evaluating the effectiveness of these techniques and identifying potential improvements. Methods such as post-weld heat treatment (PWHT), controlled cooling, and mechanical tools are analyzed for their ability to mitigate deformation. The study demonstrates that PWHT reduces residual stress and improves material quality by homogenizing the microstructure. Controlled cooling techniques effectively reduce distortion by allowing even temperature distribution during the cooling process. Mechanical tools provide nonthermal methods to stabilize and control deformation, significantly reducing distortion levels. Despite the success of these techniques, PT. INKA faces challenges related to process control and skill variance among workers. The study concludes that while reforming techniques significantly enhance the structural integrity and performance of railway components, consistent implementation and clear guidelines are essential for future improvements. Developing new technologies, enhancing workforce training, and creating comprehensive process guidelines are recommended to maintain high standards and competitiveness in the global market.
Co-Authors Abdul Chalik Nasution, Abdul Chalik Ahmad, Imran Ainun, Ainun Ajib Susanto Alexsander Yandra, Alexsander Allya Zulfa Suratinoyo, Zahna Amelia, Ayu Andi Halimah Anifatul Hanim Anik Wulandari Anton Setiawan Honggowibowo Arief Budiono Arifin, Juhar Arifin, Wanda Ariyanti, Indah Dwi Arizal N Armansyah Armansyah Arpandjaman, Arpandjaman Arsad, Jamal Hi. Arwin Datumaya Wahyudi Sumari Astika AyuningTyas, Astika Bela Sintiya Cahya, Ibnu Adnan Cendriono, Nanang Cessara, Deno Daseftra Cindy Guswanti Citra Mutiara Dewi Dailaiti, Surya Dewi Prihatini Dhiarto, Herman Cahyo Dian Rianita Dinda Rakhma Fitriani Dwi Nugraheny, Dwi Eddy Asnawi Edi Santoso Erawan, Tiar Etebom, John Monday Fahrurozi, Achmad Fara Merian Sari Fikri Budiman Fitri Fitri Franesti, Dita Hadi Paramu Hakim, Supartina Harefa, Berianto Harliyus Agustian Haruno Sajati Hernimawati Hernimawati Herniwati Herniwati I Gede Bayu Wijaya Ika Barokah Suryaningsih Imam Suroso Indarto, Erik Wahyu Irawati Irawati Iwan Arasit Jalil, Rusli Johan Johan Kiayati Yusriyah Kristanta, Stephanus Yosi Kristanto Jiwo Saputro Kuntari, Lelly Dwi Kurniady, Endang Kusumawati, Yupie Lany Nurhayati Leksonowati, Sri Saadiyah Lestari, Virny Dwiya Lestyani, Lestyani Lutfi, Agus Maidah, St Khadijah Indah Mardiah Mardiah Mochammad Imron Awalludin Mukhammad Fauzi Mulyono, Ibnu Utomo Wahyu Nanik Istiyani Ningrum, Novita Kurnia Novanadila, Iva Nugraha, Rahmat Nurkhamim, Nurkhamim Nurpiani, Mila Nurul Qomariah Nuryatno, Edi Triono Pamungkas, Dedi Bintang Parinduri, Luthfi Pramudia, Dafa Trinadi Pujiastuti, Asih Purwati Zisca Diana, Purwati Zisca Rahmat Nugraha Rahmawati, Ayu Febriyanti Dewi Raja Harahap Ramadhani, Nur Awalia Syahri Rangan, Frederico Espinoza Rendi Fajar Utama Edri Rian, Agung Firmansyah Rifki Kosasih Rosida, Siti Rofiatun Ruslyhardy Ruslyhardy Ruslyhardy, Ruslyhardy Salam Aryanto Santoso, Muji Saputri, Jeni Sartika, Santi Setiaji, Didit Adi Setiawan, Husni Setyani, Atik Soni Sisbudi Harsono, Soni Sisbudi Sonia Felga Soviyah, Soviyah Sowwam, Muhammad Suharto Suharto Sulistyo, Kartikasari Putri Suminar S. Achmadi Surya Dailiati Surya Daliati Sutisna Sutisna Syukron, Muhammad Tatok Endhiarto Tiyas, Nenden Wulan Septianning Tri Ngudi Wiyatno Triandika, Taufan Untung Sukamto, Untung Wijaya, Junior Hendri Wijaya, Widiastiana Vista Wintolo, Hero Wiyasa, Ega Ari Yasmina Amalia, Yasmina Yenni Astuti, Yenni Yuliani Indrianingsih Yusmartato, Yusmartato Zefron, Zefron