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All Journal Prosiding Seminar Nasional Pakar KURVATEK Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN International Journal of Hydrological and Environmental for Sustainability Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Erry Sumarjono
Program Studi Teknik Pertambangan, Institut Teknologi Nasional Yogyakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry 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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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 1 
KOMPLEKSITAS PERMASALAHAN MERKURI DALAM PENGOLAHAN BIJIH EMAS BERDASARKAN PERSPEKTIF TEKNIS LINGKUNGAN MANUSIA DAN MASA DEPAN Erry Sumarjono
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1833

Abstract

Mercury is one of the most dangerous heavy metal. It has highest negative effects to human and environment. It has advantage to extract gold from it’s ore, because, naturally, the character of Mercury had high affinity with Gold particle. It is very easy to use Mercury to extract Gold from it’s ore. The name of methode of mineral processing to extract Gold is Amalgamation method. Amalgamation method used tromol that had ball or rod iron inside. The function of them is look like a ball mill to crush and grind the Gold ore.Using Mercury is an easy way to extract the Gold, but, in the other hand, Mercury had been a negative effect that it has been to be continued for along times future. The complexity problems of Mercury could not to be handle by one country or one government, it must to be handled by international and global relationships. Keywords : Environment, Extraction, Heavy Metal, Mercury, Pollutant
DETERMINATION OF THE QUALITY WATER SANGON RIVER THAT EFFECTED BY AMALGAMATION GOLD ORE PROCESSING IN KALIREJO KOKAP DAERAH ISTIMEWA YOGYAKARTA Erry Sumarjono; Agung Dwi Sutrisno; Denanson Ornansah Sinaga
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3758

Abstract

Amalgamasi adalah salah satu metode yang dapat digunakan untuk ekstraksi emas dengan menggunakan merkuri. Merkuri merupakan logam berat yang sangat berbahaya bagi kesehatan manusia. Pembuangan limbah pengolahan bijih emas dengan menggunakan metode amalgamasi yang masih mengandung merkuri ke sungai dapat mempengaruhi kualitas air sungai tersebut. Penelitian yang dilakukan di Sungai Sangon untuk mengukur kandungan merkuri di dalam air sungai tersebut dan menentukan status mutu air sungai tersebut berdasarkan baku mutu air dalam Peraturan Pemerintah No. 82 Tahun 2001. Pengambilan sampel dilakukan di sepanjang aliran sungai pada titik SA1, SA2, SA3, SA4, SA5 dan SA6. Pengukuran kandungan merkuri dilakukan uji laboratorium dengan menggunakan metode Mercury Analyzer, LPPT Universitas Gadjah Mada. Hasil uji laboratorium menunjukkan bahwa kandungan merkuri di dalam air sungai Sangon masih jauh berada di bawah ambang batas yang ditentukan, sehingga masih aman digunakan untuk keperluan sesuai peruntukkan mutu air kela
MENGINTEGRASIKAN ASPEK SOSIAL PADA RENCANA PENUTUPAN DAN PASCA TAMBANG Agung Dwi Sutrisno; Erry Sumarjono; Anna Sikhatul Kaifiyah
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3775

Abstract

Penutupan tambang akan berdampak pada masyarakat sekitar, baik secara ekonomi, lingkungan maupun sosial. Terkait aspek sosial yang krusial, penelitian ini bertujuan untuk menyingkap persepsi masyarakat di sekitar lokasi pertambangan terutama dalam hal peningkatan ketrampilan bagi masyarakat sekitar sebelum tambang di tutup, sosialisasi rencana penutupan tambang dan pasca-tambang, pelibatan dalam rencana penutupan tambang dan pasca-tambang, akses terhadap modal usaha, akses terhadap fasilitas bekas tambang, dan peluang kerja pasa-tambang. Metode yang digunakan adalah kuantitatif dan dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa persepsi masyarakat sekitar tambang emas PT. Aneka Tambang (Pongkor) adalah baik, sementara untuk aspek lain justru sebaliknya. Persepsi ini dipengaruhi oleh tingkat pendidikan responden. Kedepannya perlu dilakukan upaya untuk meningkatkan persepsi masyarakat sekitar dengan meningkatkan kinerja 5 aspek selainnya.
SIZE DISTRIBUTION OF JAW CRUSHER CRUSHING PRODUCTS FOR ROUNDED MATERIAL Sumarjono, Erry; Misdiyanta, Partama; Fahrudinoor
KURVATEK Vol 9 No 1 (2024): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v9i1.4905

Abstract

Abstract — Crushing is one of stage material size reduction in mineral processing. Jaw Crusher is one of the equipment that used to reduction size material and it’s generally used in primary crushing. Feed of crushing is come from mined material (Run of Mine-ROM) that have various shapes like very rounded, rounded, angular etc. Rounded material is one of them. The aim of this research is to calculate the size distribution and the pattern of size distribution product of crushing for rounded material. The equipment of crushing in this research was used Jaw Crusher in Mineral Processing Laboratory, Institut Teknologi Nasional Yogyakarta which 30 samples material. The same pattern of size distribution was obtained from the +4#, -4#+10#, -10#+20#, -20#+40#, -40#+60#, -60#+100#, -100#+200# dan -200# product size distribution. The biggest amount of size distribution was obtained in 4#. Limiting Reduction Ratio (LRR) were distributed in range 4-6. Losses percentage (% losses) of material crushing were less than 10%. Keywords: Crushing, limiting reduction ratio, losses, mineral processing, primary
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
Co-Authors Agung Dwi Sutrisno Agus Haryanto Agustinus Isjudarto Anna Sikhatul Kaifiyah Budi, M. Sri Prasetyo Demanson Ornansah Sinaga Denanson Ornansah Sinaga Dhanty Indriastuty Fahrudinoor Hendro Purnomo Hutabarat, Hans William Kadiman, Sugiarto Kusuma, Novandri Lakon Utamakno Lin, Bih Chuan M. Aldi Rizandi Masagus A Azizi Misdiyanta, Partama Novandri Kusuma Wardana Reza Aryanto Subandrio Subandrio Suryawan, I Wayan Koko Taat Tri Purwiyono Untung Sukamto, Untung Utamakno, Lakon