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All Journal Jurnal Teknologi Pertambangan Jurnal Manajemen dan Kewirausahaan (JMDK) Jurnal Ilmiah Manajemen Kesatuan Journal of Metallurgical Engineering and Processing Technology JWM (JURNAL WAWASAN MANAJEMEN) International Journal of Applied Business and International Management Journal of International Conference Proceedings Innovative: Journal Of Social Science Research Jurnal Teknologi Mineral dan Batubara
Tri Wahyuningsih
Jurusan Teknik Pertambangan, Fakultas Teknologi Mineral, UPN “Veteran” Yogtakarta
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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PRODUKSI SERBUK KALSIUM KARBONAT DENGAN MESIN PENGGERUS HASIL MODIFIKASI PADA PT SUGIH ALAMANUGROHO Tri Wahyuningsih; Dyah Probowati; Olivia Silvi Hermanto; Monika Asworo; Meindra Setyawan
Jurnal Teknologi Mineral dan Batubara Vol 19 No 3 (2023): Jurnal Teknologi Mineral dan Batubara Edisi September 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No3.2023.1287

Abstract

Limestone is a sedimentary rock formed naturally from the died marine organisms. Limestone is used in various industrial fields, such as paint, plastics, carpets and soil pH regulator industries. PT. Sugih Alamanugroho is a limestone mining and calcium carbonate powder producer company. To produce calcium carbonate powder, limestone is dried, comminuted, and classified by size. The drying process reduces moisture content less than 4%. Then, the limestone is crushed by a jaw crusher and followed by secondary crushing by means of a hammer mill. The results of the secondary grind are crushed again using a modified grinding machine. Calcium carbonate powder will pass through an 800-mesh screen into the cyclone collector using a blower. In the cyclone collector, 800-mesh powder falls into the bottom of the cyclone, while 1200-mesh powder comes out of the cyclone and enters the cloth bags. The position of the feed on the side of the modified grinding machine is able to reduce collisions with the product. From the entire production steps, calcium carbonate powder products were produced, but did not meet the production amount target due to obstacles that occurred in the form of power outages, replacement of spare parts or equipment maintenance, machine breakdowns and late availability of spare parts.
Gold Extraction Process with Pre-Ox Sample and Aachen Assisted Leaching (AAL) using Running Aachen Dedi Pangestu; Tri Wahyuningsih
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.
The Effect of Aloe Vera Bioreagent as a Frother and Collector in the Gold Ore Flotation Process on Increasing Grade and Recovery Aufa Asna; Azalia Songli; Rizka Nabilah; Syahwanul Ikhsan; M. Fajar Rickiadi; Tri Wahyuningsih
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.
AAS and XRD Analysis of Gold Ore Bioflotation Results with Aloe Vera as an Environmentally Friendly Reagent Sabrina Mantika; Farra Diva Prillasasti; Evan Nugrah Aurigha; Rike Amelia; M. Fajar Rickiadi; Tri Wahyuningsih
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.
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 Oktavio Yorris Brilian; Tri Wahyuningsih
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.
The Analysis of the Influence of Green Supply Chain Management and Low-Cost Strategies on Environmental Performance Shafira Alya Endyanti; Titik Kusmantini; Tri Wahyuningsih
International Journal of Applied Business and International Management Vol 6, No 1 (2021): April 2021
Publisher : AIBPM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32535/ijabim.v6i1.959

Abstract

This study aims to analyze the effect of green supply chain management and low-cost strategies on environmental performance. This study used a descriptive quantitative methodology. It surveyed 78 KWTs (Women's Farmers Group) in Sewon Regency, Bantul. The sampling technique was simple random sampling. The results indicate that green supply chain management has a positive effect on environmental performance, and the low-cost strategy has a positive effect on environmental performance.
Information Sharing, Informal Contracts, and Supply Chain Performance of SMEs in Gunung Kidul Regency, Indonesia Yuli Liestyana; Hadi Oetomo; Tri Wahyuningsih; Muhamad Kiki Ariyanto
International Journal of Applied Business and International Management Vol 7, No 1 (2022): April 2022
Publisher : AIBPM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32535/ijabim.v7i1.1449

Abstract

Supply chain performance refers to the activities to meet the end customer's requirements. This study aims to analyze the effect of information sharing and informal contracts on supply chain performance with trust as a mediating variable in silver-making SMEs in Pelemgede, Sodo, Paliyan, Gunung Kidul Regency, Special Region of Yogyakarta, Indonesia. Data were collected using a questionnaire. This study used PLS with SmartPLS 3.0 software to analyze the hypothesis. The findings indicate information sharing has a positive impact on trust. Also, trust positively impacts supply chain performance, trust mediates the impact of information sharing on supply chain performance, and the effects of informal contracts on supply chain performance. Advanced research can be done by applying the study in other SMEs fields 
Co-Authors Akmal Rasyid Priyono Anton Sudiyanto Aufa Asna Azalia Songli Bakti Anugrah Hakim Dedi Pangestu Dika Setya Prayogi Dyah Probowati Evan Nugrah Aurigha Farra Diva Prillasasti Hadi Oetomo Hadi Oetomo Indun Titisariwati Indun Titisariwati Krisnandini Wahyu Pratiwi M. Fajar Rickiadi M. Fajar Rickiadi Meindra Setyawan Meindra Setyawan Mifta Khurrohmah Monika Asworo Monika Asworo Muhamad Kiki Ariyanto Muhamad Kiki Ariyanto Muhammad Evan Alhamda Oktavio Yorris Brilian Olivia Silvi Hermanto Olivia Silvi Hermanto Rike Amelia Rinaldi Choirul Muarif Rivando Brillian Saerang Rizka Nabilah Sabrina Mantika Shafira Alya Endyanti Syahwanul Ikhsan Titik Kusmantini Untung Sukamto Wawong Dwi Ratminah Yuli Liestyana Yuli Liestyana Yuli Liestyana