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Amirin Kusmiran
Universitas Islam Negeri Alauddin Makasar
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering

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PENGARUH SODIUM METABISULFIT TERHADAP KENAIKAN CONSENTRATE GRADE Cu DAN PENURUNAN KANDUNGAN PYRITE Ainun; Amirin Kusmiran; Rita Desiasni
Hexagon Jurnal Teknik dan Sains Vol 1 No 1 (2020): HEXAGON - Edisi 1
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (265.478 KB) | DOI: 10.36761/hexagon.v1i1.470

Abstract

PT. XX is one of the largest copper company in the world. Chalcopyrite (CuFeS2), bornite (Cu5FeS3) and pyrite (FeS2) are three major minerals in PT. XX is capable to produce about 2000 tons of concentrate per day, with design of processing capacity around 120,000 tonnes per day. To obtain grade Cu concentrates, an integrated method of extraction metallurgy (metal extraction) is usually carried out, so that this study focused on increasing low consentrate grade Cu, using lime and increasing pyrite content using the flotation method by varying pH and varying the dose of sodium metabisulfite. This is indicated by the percentage of Cu grade of 12.74%, the use of lime shows the percentage reduction of 50% and the decrease in pyrite to reach a percentage of 1.16%. Of the three variations of the SMB, namely no reagent, 150 and 300 in this study, 300 is a good dose in increasing grade Cu, reducing lime use and reducing pyrite content.
ANALISIS PENGARUH REAGEN MAX GOLD DAN GRINDING TIME TERHADAP RECOVERY Au Roby Maryudi; Amirin Kusmiran; Rita Desiasni
Hexagon Jurnal Teknik dan Sains Vol 1 No 1 (2020): HEXAGON - Edisi 1
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.262 KB) | DOI: 10.36761/hexagon.v1i1.471

Abstract

PT XX is one of the largest copper companies in the world. There are 2 main minerals spread in PT XX, namely copper (Cu) and Gold (Au). With a processing capacity of 120,000 tons per day, PT XX is able to produce around 2000 tons of concentrate per day. There are several problems in processing, including decreasing the acquisition of grade and recovery of copper and gold because the gold content is still covered in impurities. The sample used is derived from cleaner, namely Polishing mill produck. This study aims to see the effect of grinding time on Au recovery and grade concentrate and see the effect of Max Gold and Pax reagents on recovery of Au and Au grade. The method used is grinding and flotation. The grinding process varies 0, 5 and 10 minutes and flotation using reagents and max gold, based on the results of the study it was found that the smaller the particle size with 10 minutes grinding using the pax reagent the grade and recovery gain increased for grade 6.62 ppm and recovery 84.7%.
Co-Authors Ainun Desiasni, Rita Roby Maryudi