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Journal : Journal of Metallurgical Engineering and Processing Technology

The Effect of Cyanide Concentration and Grinding Time in Tailings on %Extraction at PT. Agincourt Resources Rakatta Banurea, Andromeda Sanjesti; Nahdi, Sabrina Almasari; Wahyuningsih, Tri
Journal of Metallurgical Engineering and Processing Technology (August 2025)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i2.13944

Abstract

This study aims to analyze the effect of cyanide concentration and ore grinding on the extraction of gold and silver. The tests were conducted on three different samples, including samples without grinding and samples with grinding sized untill 75 µm. The results of the Atomic Absorption Spectroscopy (AAS) test showed that gold content decreased in all samples, while silver content tended to increase. For the Grinding Time test used to achieve a P80 particle size (where 80% of particles pass through a sieve at certain size), it was found that the optimal time to reach 75 µm was 18 minutes and 65 seconds. Silver extraction increased with the addition of cyanide concentration up to 1000 ppm and grinding untill 75 µm, while gold extraction remained insignificant (0%). This is likely due to the short duration of the test, which only for 2 hours using the bottle roller test method. For future tests, it is recommended to use a stir leach or magnetic stirrer with longer duration of stirring time and better control of oxygen and pH levels. The test results showed that the percentage of silver extraction was 0,82%, 3,23%, and 3,28%, respectively, while the percentage of gold extraction was 0%. The AAS test revealed that gold content ranged from 0,001 g/t to 0,003 g/t, while silver content ranged from 0,322 g/t to 0,559 g/t. The most influential parameters for increasing silver extraction were ore size reduction and the addition of cyanide concentration.
Gold Extraction Process with Pre-Ox Sample and Aachen Assisted Leaching (AAL) using Running Aachen Pangestu, Dedi; Wahyuningsih, Tri
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.v4i2.11252

Abstract

The Center for Mineral and Coal Testing is an institution that works in the field of research services on mining and mineral processing. In the mineral processing research currently being carried out there is a research project related to increasing the efficiency of the leaching process using the Aachen Reactor. The samples used in this research were refractory gold samples. The problem of reducing the effectiveness of gold leaching is that there are minerals that are still included in the associated minerals, therefore a pre-treatment process is needed to remove these associated minerals. The Aachen reactor will help increase the efficiency of the leaching process by increasing Dissolve Oxygen levels to 30 ppm. In this study, two samples were used for comparison, namely the Pre-Ox sample and the Aachen Assisted Leaching (AAL) sample.
Gold Extraction Process with Base-Case Sample and Aachen Assisted Leaching (AAL) using Running Aachen at The Mineral And Coal Testing Center Tekmira, Bandung Jawa Barat Brilian, Oktavio Yorris; Wahyuningsih, Tri
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.v4i2.11337

Abstract

The Center for Mineral and Coal Testing is an institution that works in the field of research services on mining and mineral processing. In the mineral processing research currently being carried out there is a research project related to increasing the efficiency of the leaching process using the Aachen Reactor. The samples used in this research were refractory gold samples. The problem of reducing the effectiveness of gold leaching is that there are minerals that are still included in the associated minerals, therefore a pre-treatment process is needed to remove these associated minerals. The Aachen reactor will help increase the efficiency of the leaching process by increasing Dissolve Oxygen levels to 30 ppm. In this study, two samples were used for comparison, namely the Pre-Ox sample and the Aachen Assisted Leaching (AAL) sample.
AAS and XRD Analysis of Gold Ore Bioflotation Results with Aloe Vera as an Environmentally Friendly Reagent Mantika, Sabrina; Prillasasti, Farra Diva; Nugrah Aurigha, Evan; Amelia, Rike; Rickiadi, M. Fajar; Wahyuningsih, Tri
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.v4i2.11394

Abstract

Flotation is a mineral concentration method that involves floating the minerals so that they can be separated from the gangue by the addition of reagents. The reagents used are chemicals such as frother and collector, which can potentially contaminate the environment. This research explores the potential use of aloe vera as a separating reagent in environmentally friendly gold ore flotation. The feed used consists of 300 grams of gold ore, and the flotation time is set at 15 minutes. XRD analysis is employed to determine the types of minerals contained in the sample, revealing that the sample consists of 97.64% quartz; Enstatite, syn 1.21%; and Clinochlore-1A 1.16%. Atomic Absorption Spectrophotometry (AAS) is the technique used to determine the metal concentration in a sample. AAS analysis indicates an Au concentration in the feed of 3.94 ppm. The Au concentration in the concentrate with the addition of aloe vera extract is 10.57, and in the tailings, it is 0.92, higher than the concentration in the concentrate without the addition of aloe vera extract, which is 10.11, with 1.89 in the tailings. The %recovery from these concentrations with the addition of aloe vera extract is 84.06%, while without the addition of aloe vera extract, it is 63.78%. This study provides evidence that the use of aloe vera in the gold ore flotation process can be a sustainable and environmentally friendly alternative in the effort to improve the separation of valuable minerals from impurities.
The Effect of Aloe Vera Bioreagent as a Frother and Collector in the Gold Ore Flotation Process on Increasing Grade and Recovery Asna, Aufa; Songli, Azalia; Nabilah, Rizka; Ikhsan, Syahwanul; Rickiadi, M. Fajar; Wahyuningsih, Tri
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.v4i2.11395

Abstract

One of the concentration processes in processing sulfide gold ore is the flotation technique which takes advantage of differences in mineral surface properties by adding chemical reagents. The addition of chemical reagents to the flotation process can cause environmental problems. Therefore, efforts are needed to replace chemical reagents with more environmentally friendly materials. In this research, an attempt was made to replace chemical reagents with a commonly found plant extract, namely aloe vera, as a bioreagent. Bioflotation experiments on a laboratory scale were carried out using a Denver flotation cell with an aloe vera reagent as a frother. This gold mineral bioflotation experiment was carried out on a 150 mesh size fraction. The results of increasing concentrate levels by flotation indicate that the aloe vera reagent as a frother is able to produce biosurfactants which replace chemical reagents as a more environmentally friendly biofrother and biocollector. This can be concluded based on flotation experiment data with bioreagent which has been tested showing an Au content value of 10.09 and a recovery of 96.15%, while flotation using chemical reagents shows an Au content value of 10.50 and a recovery of 95.96%. So the use of aloe vera as an environmentally friendly bioreagent in the flotation process releasing low sulfidation gold is more effective than the use of chemical reagents because it is indicated that there is a biosurfactant content in aloe vera.
Beneficiation of Tailings from Primary Tin Processing from Iron Ore Mines at PT Timah Tbk in PPBT Tanjung Ular Setiawan, Agris; Manalu, Naomi B; Setyani , Atik; Wahyuningsih, Tri; Putri, Adinda; Andreana, Mellyna
Journal of Metallurgical Engineering and Processing Technology (August 2025)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

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

Abstract

The tailings produced from the previous processing are known to still contain valuable minerals such as cassiterite (SnO2), as well as associated minerals such as Fe, ilmenite, and zircon. Therefore, a beneficiation process is needed to optimize tin recovery and minimize the loss of valuable minerals. The beneficiation process includes sampling, sample reduction, grinding using a rod mill, and separation of valuable minerals using a shaking table and wet magnetic separator, as well as X-ray fluorescence (XRF) analysis. The XRF results of primary tin concentrate beneficiation using a shaking table increased the Sn content from 0.736-1.259% to 20-18.99% with a recovery of 1.779-7.456%. Magnetic separation of 40 kg of feed produced magnetic fractions of 5.7 kg and 18 kg, with Fe grades of 8.96–8.99% and Sn up to 4.90%. The grade increase was achieved, but Fe separation was still not optimal because some magnetic minerals were carried over to the non-magnetic fraction.
Co-Authors - Nurfiana AA Sudharmawan, AA Abdurrahman, Hadi Ade Iriani Adella, Nabila Prisma Adisty, Deshiva Idfi Aji administrator, administrator Ady Setiawan Afaki, Sajida Fihrisa Afifah, Dhita Agung Satmoko Agus Ristono Agus Sukarno Agwa, Mullah Muhammad Al-Ghazali, Ersan Alfi Noviyana, Alfi Algazira, Gisela Silvaina Alhadi, Rahmad Hidayat Alifa, Nadia Putri Amanda, Desi Amelia, Rike Amieni, Nada Nadiva Aisy Andi Harmoko Arifin Andini, Davi Ayu Andreana, Mellyna Anggoro, Rizky Tri Anggraeni, Yulia Anindhita, Dyah Raras Anita Swantari, Anita Anna Ratnaningsih, Anna apri dwi anggo Aprilia Pangestu Putri, Ayu Aprilia, Nadia Azizah Aprilia, Putri Dewi Aprillia Pangestu Putri, Ayu Arafah, Andi Asrafiani Arief, Arief Rakhman Hakim Arif, Nina Fapari Arifin Arifin Arifin, Zaynal Aris Susetyo Ariyanti, Wulan Aru, heti Ashlihah, Ashlihah Asna, Aufa Assahidah, Syifa Nur Azizah Asteriani, Devi Astuti, Reini Asworo, Monika Az-zahra, Aulia Azainil Azainil Azizah Putri Abdi Azmi, Zul Azzahra, Ime Nur Bachri, Bachtiar Sjaiful Badrianto, Achmad Biyanto, Annisa Brilian, Oktavio Yorris Budiyono Budiyono Buhari, Muh. Ramli Buhari, Ramli Chandra Fauzi Chen, Shih Chih Crestien, Ariska Piktoria Danang Budi Setyawan Danny Manongga Dara, Amanda Citra Deasy, Afrieany Desmita, Helma Dewi, Alivia Zahra Kirana Dewi, Lenny Fitriana Dewi, Sawitri Dini Wulandari Dola Suciana Dwiyono, Yudo Dyah Fitriana Masithoh Dyah Probowati, Dyah EDY SANWANI Eko Sediyono Erawati, Septia Sesia Ernowo, Atha Fadhil Esti Sudi Utami Evi Vilianti Evie Palenewen Fadhillah, Nur Afifah Fatmawati, Ayu Widya Febry Maghfirah Fifi Swandari Fitriani, Dayang Astri Fujianti, Ishe Fujianti, Ishe Genggang, Tiara Petri Cicilia Gunawan Madyono Putro, Gunawan Madyono Gusti Nurdin Hadi Oetomo Halida Halida Halim, Muhammad Adhim Hambali, Ahmad Imam Handayani, Merlin Hani’ah, Marsya Nadiyyatul Harmadi, Sonny Harry B Henderi . Heny Djoehaeni Heny Suseani Pangastuti Herdiyani, Puspitasari Herdiyani, Puspitasari Herlin, Herlin Herman, Sitti Rabiatul Wahdaniyah Hermanto, Olivia Silvi Heru Subekti Hidayah, Annisa Mustikhatul Hidayah, Nenden Restu Hindriyanto Dwi Purnomo Humaidi, Faisol Humaidi Hutasoit, Leonard Raden I Ketut Gunawan Ikhsan, Syahwanul Iksam, Iksam Indriana, Putri Irliany, Heny Irwan Sembiring Isna Kartika, Wilda Isnania, Nur Isnawati Isnawati Ivaniarahma, Ivaniarahma Jafar, Farny Sutriany Jati, Dian Rahayu Jayadi, Lionarto Erson Johari, Dewi Talia Johari, Dewi Talia Kartika, Wilda Isna Khoirotunnisa, Kharir Khurrohmah, Mifta Kismiati, Dyah Aniza Krisna Iryani, Krisna Kristoko Dwi Hartomo Kumalasari, Diyanah Kumalasari, Diyanah Kurniawan, Dydik Kusumaningrum, Anisa Putri Laksono Trisnantoro Leonard R. Hutasoit Liswani, Edy M.Pd S.T. S.Pd. I Gde Wawan Sudatha . Magfirah, Febry Mahfudz, Muhammad Imam Makmun Makmun Makmun Malpaleni Satriana MALPALENI SATRIANA, MALPALENI Maman Rumanta Manalu, Naomi B Mantika, Sabrina Mathesa, Justin Ricky Melani, Linda Melani, Linda Mening, Seviana Andriani Mestika Sekarwinahyu Muhlis Muhlis Mustamiroh Mustamiroh, Mustamiroh Muthoifin Nabilah, Rizka Nafisa, Unesya Lu’luatu Nafisa, Unesya Lu’luatu Nahdi, Sabrina Almasari Narpati, Dipo Andang Nisa, Lia Fakila Nisa, Zalfaa Hanifatun Ni’mati Rahmatika, Arivatu Nofita Normala Sari, Desi Novanty, Tety Noviani, Ratna Wulan Hadian Nugrah Aurigha, Evan Nuha, Nuha Nurhalisa, Suci Nurhaliza, Tiara Nurhasanah Nurhasanah Nurhasanah, Viana Nurkaromah Dwidayati, Nurkaromah Pangadongan, Fara Virgianita Pangadongan, Fara Virgianita Pangestu, Dedi Parijo . Pertiwi, Adharina Dian Pratiwi, Krisnandini Wahyu Prayogi, Dika Setya Prijoto Prillasasti, Farra Diva Purnomo, Halim Purwati Purwati Putri, Adinda Putri, Ayu Aprilia Pangestu Putri, Indah Lestari Putri, Liany Qosthori, Hiban Rahmi, Rosita Putri Rahwanto, Efana Rakatta Banurea, Andromeda Sanjesti Rakhmansyah, Mohamad Ramadhan, Naufal Raihan Rani, Nazatul Shima binti Abdul Rasdiana Rasyidah, Hanna Ratna Dwi Wulandari Ratna Wahyu Pusari . . Ravi'i Rickiadi, M. Fajar Rilla Safitri, Nur Ristasa A., Rusna Riyandi, Henry Rozie, Fachrul RR. Ella Evrita Hestiandari Rum Rosyid Salam, Amri Adi Nur Salsabila, Amalia Sastriana, Malpaleni Sawiji, S Selviana, Ressa Sentosa, Ilham SEPTI WULANDARI Setiadi, M Ilham Bintang Setiawan, Agris Seto, Samudro Setyani , Atik Setyawan, Meindra Singgih Adhi Prasetyo, Singgih SITI KHODIJAH CHAERUN Siti Masitoh Sjamsir, Hasbi Songli, Azalia Srenggini, Abdullah Dwi Sri Riyani Srinivasan, Bhavana Steven Phang Sucianny, Wulan Ayu Sucianny, Wulan Ayu Sudaryatie, Sudaryatie Sudikno Sudikno Sugeng Santoso Sugianto, Dwi Sugiyono Sugiyono Sukriadi sukriadi sukriadi Sulistiawati, Siti Sulistyowati Tuminah Darjoko, Sulistyowati Tuminah Supriadi Takwim Syambasril, Syambasril Syaputri, Nadhiratul Taqwa Hariguna Tasrim, Tasrim Taufik Hidayat Titik Kusmantini Tri Sumarsih Tri Yunis Miko Wahyono Triwahyuningsih, Ria Yulianti Triwahyuningsih, Ria Yulianti Trustho Raharjo Tugiyo, Tugiyo Ucu Rahayu Ufaira, Naura Umar, Huzaifah Usman, Fahrul Rozzi Wardono Wardono Widayanti , Nurul Winanti, Suci Winarko, Ronny Winarno Winarno Winjaya Laksana, Andri Wulandari, Fauziyah Yahya Pratiwi, Tety Yanas, Yogi Gautama Yekti Utami Yohana, Maryetha Yova Yosi Gumala Yudhomenggolo Sastro Darmanto Yuli Liestyana Yulsi, Yulsi Zahra, Diya Fatihah Zain, Syarifah Zafira