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Harwan Harwan
Jurusan Teknik Pertambangan, Universitas Muslim Indonesia, Makassar
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Journal : Journal of Mining Insight

 1 
Analisa Pengaruh Batuan Asal Terhadap Profil Nikel Laterit Menggunakan Analisis XRF Dan Petrografi Di Daearah Kolaka Utara Husain, Jamal Rauf; Harwan, Harwan; Mustakim, Mustakim
Jurnal of Mining Insight Vol 1 No 3 (2023): Journal of Mining Insight
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jmi.v1i3.210

Abstract

Nickel is one of the metals needed by humans. In general, nickel can be formed primarily or secondarily, known as nickel laterite. Nickel deposits in Indonesia are only found in the form of nickel laterite. The parent rock of nickel laterite deposits is ultrabasic rock, especially from the types of harzburgite, dunite, and other peridotites. The data collection technique used is to take data related to the research, both primary and secondary data. Primary data includes outcrop data (megascopic description) at the research location, exploration drill data to determine the thickness of the nickel laterite layer and the content of its elements and rock sample data for petrographic thin section analysis. Sampling was carried out in block A. While secondary data includes data on the general condition of the company, and a map of the research location. 1. The original rock analyzed petrographically is serpentinezed harzburgite. The minerals contained are orthopyroxene, olivine, clinopyroxene, and opaque minerals. The weathering level of the nickel laterite profile in the limonite zone is higher than the saprolite zone because in the saprolite zone most of the rocks are small in size and the original rocks affect the nickel laterite profile that is formed, but are still supported by other factors, namely topography, climate, geological structure, vegetation and time.
Analisis Mine Dewatering pada Penambangan Nikel PT Makmur Lestari Primatama Kecamatan Langgikima Kabupaten Konawe Utara Provinsi Sulawesi Tenggara ma'rief, Al’Faizah; Harwan; Widodo, Sri
Jurnal of Mining Insight Vol 1 No 4 (2023): Journal of Mining Insight
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jmi.v1i4.252

Abstract

The problem that is often faced in mining activities in open pit mines is high rainfall that can hamper mining operations. Mine Dewatering is a handling of mine water problems by removing water that has entered the mining area (by utilizing differences in height and gravitational force) through drainage channels to temporary storage ponds (sump). This system is commonly applied for handling runoff from rainwater. The purpose of this study is to find out the volume of water entering the mining front, analyze the ideal sump volume to hold runoff water and analyze the ability and duration of pumping to slice water that is in the sump. The average rainfall obtained from data for 2019-2022 is 81 mm/day. The calculation of planned rainfall is determined using a gumble distribution, the calculation of planned rainfall based on the repeat period over 2 years is 201,658 mm/day. Based on the results of the study, the average rain time was 11.97 hours, rainfall intensity was 6,572 mm/hour, runoff coefficient was 0.9 and the rain catchment area was 692,000 m2. So that the runoff water discharge that enters the sump is 4,093.04 m3/hour, the total volume of water entering the sump is 98,233 m3/day. The ideal sump volume to hold runoff water is 71,813.36 m3. The pumping discharge is 1,841.62 m3/hour, the length of sump drying time with an estimated pumping time of 20 hours/day is 9 days.
Analisis Geokimia Batugamping Daerah Desa Binuang Kecamatan Balusu Kabupaten Barru Provinsi Sulawesi Selatan Harwan, Harwan; Hafsyam, Muhammad; Juradi, Muhammad Idris
Jurnal of Mining Insight Vol 1 No 4 (2023): Journal of Mining Insight
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jmi.v1i4.254

Abstract

Limestone is a type of sedimentary rock with the main mineral composition being calcite with the chemical formula CaCO3. Limestone found in nature is generally yellowish white, white, gray and black. This research aims to determine the geochemical characteristics of limestone in Binuang Village, Balusu District, Barru Regency and what the chemical composition of limestone in Binuang Village, Balusu District, Barru Regency. The research method uses XRD analysis and XRF analysis methods. in mineralogical analysis using the X-Ray Diffraction method, all limestone samples in 4 stations in the Binuang Village area were composed of minerals such as Calcite (CaCO3) containing 100% calcite. Based on the results of analysis using the X-Ray fluorescence method, all limestone samples at 4 stations showed CaO element values of 52.7-55.4%, LOl of 39.2-43.6%, Fe2O3 of 1.4-2.53 %, MgO is 1.17-1.29%, as well as several other compounds whose percentage is below 1% such as P2O5, SiO2, Al2O3, MnO, K2O, Na2O and TiO2. So the limestone in this study can be categorized as high quality (high grade limestone) because it has a CaO content of > 49%. This means that the limestone samples found in the Binuang Village area, Barru District, South Sulawesi Province have met good quality standards for raw materials for making cement and can be used as an addition in the steel smelting process.
Co-Authors A. F. Heriansyah A. F. Heriyansyah A. Maulana Abdul Salam Munir Adi Maulana Agus A Budiman Agus Ardianto Budiman Alam Budiman Thamsi Alfian Nawir Andi Fadli Heriansyah Andi Fahdli Heriansyah Ansariah Ansariah Anshariah Anshariah Anshariah Anshariah Arifin, Mubdiana Bakri, Hasbi Bakri, Suriyanto Birrul Waalidain, Alif Chalik, Citra Aulian Citra Aulian Chalik Dewy Kumala Tehuayo Dirgahayu Lantara Firdaus . Firdaus F Firdaus Firdaus Firman Firman Firman Nullah Yusuf Habibie Anwar Habiebie Anwar Hafsyam, Muhammad I. Nur Idris Juradi, Muhammad Imam Riswandi Iqbal Rustam, Muhammad Irzal Nur, Irzal Jamal Rauf Husain Jamal Rauf Husain M. S. Said ma'rief, Al’Faizah Mohammad salman said Muhammad Aswadi Mustakim Mustakim Nasrullah Nasrullah Nawir, Alfian Nur Asmiani Nurhawaisyah, Sitti Ratmi Nurliah Jafar Nurliah Jafar, Nurliah Prasetyawati Umar, Emi Sitti Riatmi Nurhawaisyah Sri Widodo Suryanto Bakri Tri Andriyani HS Kandora Tri Andriyani Kandora Wakila, Muhammad Hardin Zulfadli Zulfadli