Mekanik Aktive Edilmiş Diasporitik Boksitten Atmosferik Koşullarda Mikrodalga Destekli Liç ile Alümina Üretimi

Year 2023, Volume: 6 Issue: 1, 36 - 43, 01.01.2023

Volkan Murat Yılmaz , Kenan Yıldız

https://doi.org/10.34248/bsengineering.1180295

Abstract

Bu çalışmada, Gaziantep – İslahiye bölgesi diasporitik boksitten mikrodalga liçiyle alümina üretimine mekanik aktivasyon ve Ca(OH)2 katkısının etkisi araştırılmıştır. NaOH ile yapılan mikrodalga liç çalışmalarında mikrodalga gücü, Ca(OH)2 katkısı, sıvı/katı oranı ve liç süresi gibi parametreler hem orijinal diasporitik boksit hem de 60 dakika aktive edilmiş diasporitik boksit için incelenmiştir. Ca(OH)2 katkılı liç işlemlerinde 1200 W mikrodalga gücü, sıvı/katı oranı 20 ve liç süresi 30 dakika olduğunda, aluminyum verimi orijinal cevherden % 48,59 ve aktive edilmiş cevherden %78,51 olarak gerçekleşmiştir. Son olarak çöktürme ve kalsinasyon yoluyla α-Al2O3 elde edilmiştir. Araştırmada elde edilen sonuçlara göre, İslahiye bölgesi diasporik boksitten mekanik aktivasyon sonrasında atmosferik koşullarda ve Ca(OH)2 katkısıyla mikrodalga liçi yapılarak kabul edilebilir oranda alümina elde edilebileceği görülmüştür.

Keywords

Diasporitik boksit, Mekanik aktivasyon, Mikrodalga liçi

Production of Alumina from Mechanically Activated Diasporic Bauxite by Microwave Assisted Leaching at Atmospheric Conditions

Abstract

In this study, the effect of mechanical activation and Ca(OH)2 additive on alumina production by microwave leaching from diasporic bauxite in Gaziantep – Islahiye region were investigated. In microwave leaching studies with NaOH, parameters such as microwave power, Ca(OH)2 addition, liquid/solid ratio and leaching time were investigated for both original diasporic bauxite and 60 min activated diasporic bauxite. In microwave leaching with Ca(OH)2 additive, while the aluminum extraction from original ore was 48.59% and it is 78,51% from the activated ore at 1200 W microwave power, 20 as liquid/solid ratio, 30 min of leaching time. Finally α-Al2O3 was obtained by precipitation and then calcination. According to the results obtained in this study, it was seen that an acceptable percent of alumina could be obtained by microwave leaching in atmospheric conditions after mechanical activation and Ca(OH)2 addition from diasporic bauxite in Islahiye region.

Keywords

Diasporic bauxite, Mechanical activation, Microwave leaching

References

• Abdi MS, Ebadzadeh T. 2013. Mullitization, microstructure and physical properties of mechanically activated andalusite sintered by microwave. Ceram Inter, 39(2): 1451-1454.
• Alex TC, Rakesh K. 2017. Surface and bulk activation of a siliceous bauxite during attrition milling. Int J Miner Proc, 160: 32-38.
• Al-Harahsheh M, Kingman SW 2004. Microwave-assisted leaching-a review. Hydromet, 73: 189-203.
• Arıkan H, Demir GK, Vural S. 2019. Investigation of lime usage impacts on bauxite processability at ETI Aluminyum Plant. Inter J Ind Chem, 10: 57-66.
• Birinci M, Gök R. 2018. Ön desilikasyon amaçli boksit zenginleştirme işlemleri üzerine güncel bir değerlendirme. Bil MadenDerg, 57(3): 197-218.
• Birinci M, Gök R. 2021. Characterization and flotation of low-grade boehmitic bauxite ore from Seydişehir (Konya, Turkey). Miner Eng, 161: 106714.
• Demir GK. 2017. Bayer prosesine kireç kullanımının etkisinin araştırılması ve Eti Alüminyum tesislerinde uygulamaları. Yüksek Lisans Tezi, Necmettin Erbakan Üniversitesi, Konya, Türkiye, pp: 197.
• Göktaş M. 2018. Cevher hazırlamada mekanik aktivasyon uygulamaları. Madencilik, 57(1): 57-66.
• Hanilçi N. 2019. Bauxite Deposits of Turkey. In: Pirajno F, Ünlü T, Dönmez C, Şahin M. (eds) Mineral Resources of Turkey. Modern Approaches in Solid Earth Sciences, vol 16. Springer, Cham, Germany, pp: 681-730.
• He H, Cao J, Duan N. 2018. Novel bead-milling mechanically pulverized bulk mineral particles to ultrafine scale: energy storage and cleaner promotion of mineral extraction. J Clean Prod, 198: 46-53.
• Kumar A, Agrawal S, Dhawan N. 2020. Mechano-chemical processing of diaspore sample for extraction and synthesis of gamma-alumina and potash values, JOM, 72(10): 3367-3376.
• Le T, Ju S, Lu L, Peng J, Zhou L, Wang S. 2017. A novel process and its mechanism for recovering alumina from diasporic bauxite. Hydromet, 169: 124-134.
• Le T, Ju S, Ravindra AV, Li X, Wang Q. 2019. Effect of microwave roasting on aluminum extraction from diasporic bauxite-sodium carbonate-calcium hydroxide mixtures. JOM, 71(2): 831-837.
• Lu T, Pickles CA, Kelebek S. 2012. Carbothermal reductive upgrading of a bauxite ore using microwave radiation. High Temp Mater Proc, 31: 139-148.
• Pickles CA. 2009. Microwaves in extractive metallurgy: Part 2 – A review of applications, Miner Eng, 22: 1112-1118.
• Sarı R. 2019. Boksit Madenlerimizin İçerisindeki Gizli Potansiyeller. MadenTürkiye Derg, 80. URL: https://yermam.org.tr/uploads/kutuphane/216274_boksit_madenlerimizin_icerisindeki_gizli_potansiyeller_15_07_2019.pdf (erişim tarihi: 10 Temmuz 2022).
• Solymar K, Ferenezi T, Papanastassiou D. 2004. Digestion of monohydrate bauxite with lime feding at high temperature, 15th International Symposium of ICSOBA-2004, June 15-18, 2004, St. Petersburg, Russia, pp: 135-141.
• Yang M, Yang H, Tian S, Zhang C, Hu B, Du Y, Wang M, Wang X. 2021. Effect of mechanical activation on extraction of vanadium from chromium-containing vanadate solution by calcification and carbonization. Hydromet, 201: 105591.
• Yılmaz VM, Parlak TT, Yıldız K. 2018. Dehydroxylation of high-energy ball-milled diasporic bauxite. J Thermal Anal and Cal, 134(1): 135-141.