Indriyani, Liga (2020) Analisa Lean Mining sebagai Upaya Mengurangi Waste dan Meningkatkan Efisiensi Proses Produksi Dore Bullion di Industri Gold Mining. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Salah satu industri yang memiliki area bisnis dengan permintaan pasar yang tinggi yaitu industri tambang emas sehingga perusahaan tersebut sering harus melampaui target produksinya untuk memenuhi permintaan tersebut. Maka untuk mendukung output produksi dalam jumlah yang banyak, perusahaan harus mampu membuat proses lebih efisien dengan cara mengurangi masalah waste yang menghambat proses produksi. Berdasarkan observasi awal, masalah tersebut meliputi waste defect berupa choke material ore, ketidaksesuaian hasil cetakan dore bullion, dan kerusakan alat. Selain itu, terdapat waste overproduction dan waiting. Waste waiting diakibatkan karena adanya ponding saat proses leaching. Kemudian terdapat pula waste overprocessing dan transportation berupa jarak pengangkutan ore yang berubah-ubah dan jauh. Terjadinya waste tersebut dapat dikurangi atau dihilangkan dengan menggunakan suatu pendekatan Lean. Lean yaitu metode untuk merampingkan atau mengefisiensikan proses dengan menghilangkan/mengurangi adanya waste pada proses mining. Pengidentifikasian waste dengan menggunakan tools Waste Assesment Model (WAM). Hasil analisa WRM yaitu defect dengan persentase 17,24% merupakan waste yang paling berpengaruh terhadap waste lainnya. Sementara hasil analisa WAQ yaitu dihasilkan peringkat waste tertinggi yaitu defect, motion, waiting, dan Process dengan persentase berturut-turut dari yang terbesar yaitu 20,75%, 18,42%, 17,57%, dan 14,36%. Dari hasil tersebut kemudian rekomendasi perbaikan yang dapat diusulkan untuk mereduksi waste yang memiliki peringkat tinggi tersebut antara lain yaitu menggunakan tools Kamishibai control board untuk controlling ukuran dan komposisi campuran ukuran ore, tools TPM untuk mengurangi adanya waste waiting dengan meningkatkan efisensi kerja alat crusher, mengoptimalkan kinerja maintenance, membuat cetakan dore bullion berbentuk sejajar atau tidak bertumpuk dan mengatur flowrate larutan emas ke cetakan untuk mengurangi waste defect ketidaksesuai hasil cetakan dore bullion, serta membuat standardized work pada proses irigasi.
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One of the industry that has a business area with high market demand is the gold mining industry, so the company often has to exceed its production targets to supply these demands. To support production output in large quantities, companies must be able to make the process more efficient by reducing waste problems that hinder the production process. Based on preliminary observations, these problems include waste defects in the form of choke ore materials, mismatches of dore bullion printing, and equipment damage. In addition, there is waste overproduction and waiting. Waste waiting is caused by the existence of ponding during leaching. Then there are waste overprocessing and transportation in the form of the distance of ore transportation that changes and far away. The occurrence of the wastes can be reduced or eliminated by using a Lean approach. Lean is a method to streamline processes by eliminating / reducing waste in the mining process. Identifying waste using the Waste Assessment Model (WAM) tools consist of WRM and WAQ. The result of WRM analysis is defect with a percentage of 17.24% which is the most influential waste to other waste. While the results of the WAQ analysis are the highest waste rating, namely defect, motion, waiting, and process with the highest percentage of success, namely 20.75%, 18.42%, 17.57%, and 14.36%. From these results then recommendations for improvements that can be proposed to reduce waste that has a high rating include, among others, using Kamishibai control board tools to control the size and composition of ore size mixing, using TPM tools to reduce waste waiting by increasing the working efficiency of the crusher, optimizing performance maintenance, making dore bullion molds in a parallel or non-stacked shape and regulating the flowrate of the gold solution to the mold to reduce waste defects that are incompatible with dore bullion prints, as well as making standardized work in the irrigation process.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTMT 658.5 Ind a-1 |
| Uncontrolled Keywords: | Lean Mining, Mining, Waste Assesment Model, Root Cause Analysis, waste, ore, gold bullion |
| Subjects: | T Technology > T Technology (General) > T58.8 Productivity. Efficiency |
| Divisions: | Faculty of Creative Design and Digital Business (CREABIZ) > Technology Management > 61101-(S2) Master Thesis |
| Depositing User: | Liga Indriyani |
| Date Deposited: | 17 Mar 2025 03:59 |
| Last Modified: | 17 Mar 2025 03:59 |
| URI: | http://repository.its.ac.id/id/eprint/73517 |
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