Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleAçık Erişim2025Scopus SJRQ3Optimization of rare earth elements recovery from Kızıldag (Karaman-Türkiye) shale ore using response surface methodology
Uysal, Turan; Ünal, Ceren Erust; Akça, Muhammet Esat; Sis, Hikmet; Erdemoğlu, Murat
In this study, the usability of bauxite-related shale ore, rich in Rare Earth Elements (REEs), to produce REEs, which have high added value and critical importance, was investigated. In this context, Kızıldag (Karaman-Türkiye) shale ore, was prepared for tests through size reduction and sampling processes. HCl leaching was performed at different acid concentrations, leaching times, leaching temperatures, and liquid/solid ratios to determine the optimum leaching conditions for the milled ore. The modeling and optimization parameters related to leaching recovery were investigated using the response surface method (RSM). The results were evaluated using analysis of variance, three-dimensional graphs were drawn, and the accuracy of the models was discussed. Accordingly, optimum values were found, and the REE leaching recovery corresponding to these optimum values was 49.13%. It was concluded that the optimization results were compatible with the experimental results, and the average error rate (6.35%) was low.
AtıfScopus3OpenAlex4
İncele - MakaleAçık Erişim2023Pirofillit Cevherinden Alümina Üretimine Zenginleştirme Yöntemlerinin Etkisi
Erdemoğlu, Murat; Uysal, Turan; Aydoğmuş, Ramazan
Bu çalışmada, pirofillit cevherinden alüminyum (Al) kazanımı üzerine farklı zenginleştirme yöntemlerinin etkisi araştırılmıştır. Zenginleştirme yöntemleri pirofillitin doğal hidrofob yapısından dolayı flotasyon yöntemi, kırılganlık farklılığından dolayı ise Aşındırmalı Yıkama (AY) yöntemi kullanılmıştır. Zenginleştirme sonucu konsantre numunelere HCl ile liç işlemi yapılmış, liç sonucu çözeltiye geçen Al miktarları karşılaştırılarak değerlendirilmiştir. Pirofillit cevherinin AY yöntemi ile zenginleştirilmesi sonucu %54.79 verimle %27.44 Al2O3 tenörlü bir konsantre, flotasyon yöntemi ile ise %30.49 verimle %28.05 Al2O3 tenörlü bir konsantre elde edilmiştir. Buna göre zenginleştirme verimi açısından AY yöntemi daha verimli iken liç verimi açısından ise flotasyon yönteminin daha verimli olduğu belirlenmiştir. Tüvenan cevhere göre nihai alümina miktarı ve saflığı birlikte değerlendirildiğinde doğrudan liç ve AY konsantresi değerlerinin birbirine yakın olduğu belirlenmiştir. Sonuç olarak pirofillit cevherinden alümina üretimi için ayrıntılı ekonomik analiz yapılarak uygun yöntemin belirlenmesinin daha doğru olacağı değerlendirilmektedir.
- MakaleYayıncıda açık erişim2023Scopus SJRQ3Potassium chloride recovery from mechanically activated microcline through the chlorination roasting and leaching route
Alyosif, Bahaa; Uysal, Turan; Erdemoğlu, Murat
In this study, effects of mechanical activation in the chlorination roasting and water leaching route known as CaCl2 process and developed for the production of potassium chloride (KCl) from potassium feldspar ores were studied. A microcline containing K-feldspar ore with 10.89% K2O was first intensively dry milled by a planetary ball mill and mixed with calcium chloride (CaCl2) and then roasted at temperatures up to 1000 °C to obtain KCl that will be finally dissolved by the water leaching. Potassium recovery by water leaching increased rapidly up to 800 °C. At higher temperatures, the recovery decreased fast due to the evaporation of KCl. According to the K recovery values per unit energy consumed, the optimum roasting temperature was determined as 750 °C and the milling time was 15 min. It was concluded that intensive milling causes mechanical activation of the microcline to reduce the chlorination roasting temperature, which triggers a rise in the K recovery by the water leaching.
AtıfScopus9WoS8OpenAlex7İncele - MakaleYalnız künye2023Scopus SJRQ2Aluminum Recovery by Acid Leaching of Variously Enriched Pyrophyllite Ore: Effects of Pre-treatment Methods for Activation
Aydoğmuş, Ramazan; Erdemoğlu, Murat; Uysal, Turan
Effects of pre-treatment methods such as calcination for thermal activation and intensive milling for mechanical activation on the aluminum (Al) recovery by acid leaching of preliminarily enriched pyrophyllite ore via attrition scrubbing and froth flotation were investigated. XRD patterns of the calcined and the intensively milled samples were compared to determine the changes during the pre-treatment processes. Hot HCl solution was used for dissolution of aluminum to determine the Al recoveries from variously enriched and variously pre-treated pyrophyllite ore samples. Specific thermal and milling energies consumed per unit amount of ore were calculated, and the ideal activation method was suggested by comparing the activation methods in terms of energy consumption. Mechanical activation of the pyrophyllite concentrate obtained by attrition scrubbing rather than froth flotation was suggested for higher recoveries of aluminum from by acidic leaching. It was determined that operating cost (in terms of energy) of the mechanical activation is lower and aluminum recovery is higher than thermal activation. It was concluded that mechanical activation instead of thermal activation is more economical and environmentally friendly method.
AtıfScopus5WoS4OpenAlex5İncele - MakaleYalnız künye2023Scopus SJRQ2Contribution of Mechanical Activation for Obtaining Potassium Chloride from Microcline
Alyosif, Bahaa; Uysal, Turan; Aydemir, Muhammet Kürşat; Erdemoğlu, Murat
The effect of intensive milling on the conversion of microcline (KAlSi3O8) to potassium chloride (KCl) occurred during the chlorination roasting process for artificial KCl production was investigated. A feldspar ore with 10.89% K2O grade and containing microcline was dry milled by a planetary ball mill for mechanical activation. Milled ore mixed with calcium chloride was roasted at temperatures between 500 and 1000 °C to get the chlorination roasting process. The product was then leached in water to dissolve KCl occurring during the roasting, which will be precipitated from the pregnant leach solution by evaporation. Results showed that potassium recovery from the unmilled ore increased rapidly up to 800 °C, and dramatically decreased at higher temperatures due to the removal of KCl from the furnace by means of evaporation. A potassium recovery of 31.95% was achieved by the unmilled ore, whereas it was 88.43% when 15 min milled ore was roasted at 750 °C. It was concluded that intensive milling caused mechanical activation of microcline to reduce the roasting temperature of the chlorination roasting process.
AtıfScopus12WoS11OpenAlex10İncele
