Garuda - Garba Rujukan Digital

PELINDIAN REDUKTIF BIJIH MANGAN NUSA TENGGARA TIMUR DENGAN MENGGUNAKAN MOLASES DALAM SUASANA ASAM[Reductive Leaching of Manganese Ore from East Nusa Tenggara With Molasses in Sulfuric Acid Solution] Sumardi, Slamet; Mubarok, Mohammad Zaki; Saleh, Nuryadi; Firdiyono, F
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : Pusat Penelitian Metalurgi dan Material - LIPI

PELINDIAN REDUKTIF BIJIH MANGAN NUSA TENGGARA TIMUR DENGAN MENGGUNAKANMOLASES DALAM SUASANA ASAM . Mangan merupakan logam keempat yang sering digunakan dalamkehidupan sehari-hari selain besi,aluminium dan tembaga. Penggunaan lain dari mangan adalah sebagai bahankimia, desinfektan dan oksidator. Dalam penelitian ini telah dilakukan pengambilan logam mangan dari bijihmangan daerah Kupang Nusa tenggara Timur dengan metode pelindian reduktif dalam suasana asam sulfat.Agen pereduksi yang digunakan berupa limbah pabrik gula tebu yang dinamakan molases. Tujuan penelitian iniadalah untuk mengetahui pengaruh konsentrasi asam sulfat, suhu pelindian dan persen solid terhadap persenekstraksi mangan dan persen ekstraksi keterlarutan besi. Penelitian diawali dengan preparasi bijih mangan yaitudengan cara mereduksi ukuran hingga mesh 140 dan dilakukan analisa komposisi kandungan logam sampelbijih dengan menggunakan XRF (x-ray fluorescence). Sejumlah sampel bijih mangan dimasukkan ke dalamreaktor pelindian yang telah berisi asam sulfat dan molases. Variasi percobaan yang digunakan dalam penelitianini adalah konsentrasi reagen pelindi yaitu asam sulfat, suhu pelindian dan persen solid yang digunakan.Pelindian yang bersifat reduktif ini dilakukan selama 6 jam dengan kecepatan pengadukan dibuat tetap yaitu 200rpm. Persen ekstraksi mangan tertinggi untuk percobaan pelindian reduktif bijih mangan dengan molases sebagaiagen pereduksi dalam suasana asam sulfat sebesar 95,33%. Hasil ini dicapai pada konsentrasi asam sulfat 6%,suhu pelindian 70 °C, persen solid 10%, molases yang digunakan 100g/L, kecepatan pengadukan 200 rpm danwaktu pelindian 6 jam. AbstractManganese is the fourth most used metal in daily lives besides iron, aluminium and copper. Other usage ofmanganese is for chemical raw material disinfectant and chemical oxidizing. This experiment was done inKupang, East Nusa Tenggara to extract manganese from manganese ores by reductive leaching in sulfuricacid conditions. Molasses as waste from sugarcane factory is used as redactor. The purpose of thisexperiment is to measure the impact of sulfuric acid concentration, leaching temperature and solid percentageon percentage of manganese extraction and percentage of iron solubility extraction. This experiment ispreparing manganese ores by reducing into 140 mesh and analyze ores compositions using XRF. Someamounts of manganese ores are inserting into leaching reactor which contains sulfuric acid and molasses.Variables in this experiment are leaching concentration (sulfuric acid), leaching temperature and solidpercentage. This leaching is reductive in 6 hours with constant speed 200 rpm. Leaching solution is filteredto separate filtrate with from obtained residue. Filtrate is analyzed using AAS to measure manganese andiron content. Meanwhile residue is dried and weighed. We conclude that manganese extraction onmanganese ores from Kupang, NTT can be carried by reductive leaching using molasses as reductive agenton sulfuric acid media. The highest manganese extraction for this experiment is 95, 33 % which can beachieved by using 6% sulfuric acid, 70 oC temperature, 10 % solid, 100 g/L molasses,200 rpm mixing speedand 6 hours of leaching .

STUDI PERBANDINGAN PROSES PELINDIAN UNTUK EKSTRAKSI SKANDIUM DARI TERAK RESIDU BAUKSIT Sariman; Rochani, Siti; Saleh, Nuryadi; Rodliyah, Isyatun; Dianawati, Erika Arum; Wijayanti, Retno
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.No3.2023.1509

Scandium is classified as a rare earth element. Its existences are geochemically in small amounts as associate minerals. Consequently, scandium production is minimally from processing residues of major minerals. Indonesia has large bauxite deposits, and it is processed into alumina, producing bauxite residue as a by-product. The bauxite residue contains rare earth metals, including scandium. In this study, various ways of extracting scandium from bauxite residue slag were carried out. The bauxite residue beneficiation process was done through a smelting reduction process followed by magnetic separation. Scandium extractions were carried out from the bauxite residue slag through a leaching process with concentrated sulfuric, sulfation, alkali fusion, and a 2-stage acid leaching. The best percentage of scandium extracted was obtained at 88.40%, using the 2-stage acid leaching at the acid concentration of 500 g/kg, the temperature of 90oC, and the leaching time at 3 hours for each leaching stage. In addition, the best neodymium extracted achieved 76,97%, using the alkali fusion, fused in NaOH at 700oC for 3 hours.

PEROLEHAN MINERAL BESI DARI RESIDU BAUKSIT INDONESIA Sariman; Rochani, Siti; Saleh, Nuryadi; Wijayanti, Retno; Dianawati, Erika Arum
Indonesian Mining Journal Vol 27 No 1 (2024): Indonesian Mining Journal, April 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No1.2024.1538

Bauxite residue, a solid waste discharged during alumina extraction, is a hazardous material. Its disposal leads to a serious environmental issue although it contains valuable matter such as titanium, silica, rare earth elements, and high iron content (20-60%). This work aims to improve the recovery of iron content within the bauxite residue using three methods, namely direct magnetic separation, roasting followed by magnetic separation, and reduction followed by magnetic separation. Coal as a reductant and Na2CO3 and Na2SO3 as fluxes were used in the reduction process. The result of the study reveals that the direct magnetic separation produces iron concentrate with the Fe content of 53.69% and a recovery of 26.72%, while the roasting process at 900˚C and magnetic separation produces a concentrate of 54.57% Fe with a recovery of 37.33%. The best method was by reduction and magnetic separation process using 4% of Na2CO3 producing iron concentrates with a content of 63.53% Fe and recovery of 74.73%.

PEROLEHAN MINERAL BESI DARI RESIDU BAUKSIT INDONESIA Sariman; Rochani, Siti; Saleh, Nuryadi; Wijayanti, Retno; Dianawati, Erika Arum
Indonesian Mining Journal Vol 27 No 1 (2024): Indonesian Mining Journal, April 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No1.2024.1538

Bauxite residue, a solid waste discharged during alumina extraction, is a hazardous material. Its disposal leads to a serious environmental issue although it contains valuable matter such as titanium, silica, rare earth elements, and high iron content (20-60%). This work aims to improve the recovery of iron content within the bauxite residue using three methods, namely direct magnetic separation, roasting followed by magnetic separation, and reduction followed by magnetic separation. Coal as a reductant and Na2CO3 and Na2SO3 as fluxes were used in the reduction process. The result of the study reveals that the direct magnetic separation produces iron concentrate with the Fe content of 53.69% and a recovery of 26.72%, while the roasting process at 900˚C and magnetic separation produces a concentrate of 54.57% Fe with a recovery of 37.33%. The best method was by reduction and magnetic separation process using 4% of Na2CO3 producing iron concentrates with a content of 63.53% Fe and recovery of 74.73%.

STUDI PERBANDINGAN PROSES PELINDIAN UNTUK EKSTRAKSI SKANDIUM DARI TERAK RESIDU BAUKSIT Sariman; Rochani, Siti; Saleh, Nuryadi; Rodliyah, Isyatun; Dianawati, Erika Arum; Wijayanti, Retno
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.No3.2023.1509

Scandium is classified as a rare earth element. Its existences are geochemically in small amounts as associate minerals. Consequently, scandium production is minimally from processing residues of major minerals. Indonesia has large bauxite deposits, and it is processed into alumina, producing bauxite residue as a by-product. The bauxite residue contains rare earth metals, including scandium. In this study, various ways of extracting scandium from bauxite residue slag were carried out. The bauxite residue beneficiation process was done through a smelting reduction process followed by magnetic separation. Scandium extractions were carried out from the bauxite residue slag through a leaching process with concentrated sulfuric, sulfation, alkali fusion, and a 2-stage acid leaching. The best percentage of scandium extracted was obtained at 88.40%, using the 2-stage acid leaching at the acid concentration of 500 g/kg, the temperature of 90oC, and the leaching time at 3 hours for each leaching stage. In addition, the best neodymium extracted achieved 76,97%, using the alkali fusion, fused in NaOH at 700oC for 3 hours.

Title

Found 5 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 5 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 5 Documents
Search