DISSOLUTION KINETICS OF NICKEL FROM GÖRDES (MANİSA-TURKEY) LATERITIC ORE BY SULPHURIC ACID LEACHING UNDER EFFECT OF SODIUM FLUORIDE

Yıl 2017, Cilt: 5 Sayı: 3, 353 - 361, 01.09.2017

Tevfik Ağaçayak , Ali Aras

https://doi.org/10.15317/Scitech.2017.95

Öz

In this study, dissolution kinetics of nickel from Gördes (Manisa-Turkey) lateritic ore by sodium fluoride in sulphuric acid solution was investigated. The effects of stirring speed, sulphuric acid concentration, sodium fluoride concentration and temperature on nickel extraction were examined. To determine the dissolution kinetics of nickel in sulphuric acid medium under effect of sodium fluoride, shrinking core model was applied to dissolution recoveries. As a result of kinetic studies, it was determined that mixed kinetic model was appropriate. The activation energy (Ea) for the dissolution was calculated as 41.24 kJ/mol.

Anahtar Kelimeler

Dissolution kinetics, Lateritic ore, Nickel, Sulphuric acid, Sodium fluoride, Activation energy

Sodyum Florür Etkisinde Sülfürik Asit Liçi ile Gördes (Manisa-Türkiye) Lateritik Cevherinden Nikelin Çözünme Kinetiği

Öz

Bu çalışmada, sodyum florür içeren sülfürik asit çözeltisinde Gördes (Manisa-Türkiye) lateritik cevherinden nikelin çözünme kinetiği araştırılmıştır. Karıştırma hızı, sülfürik asit ve sodyum florür derişimi ve sıcaklığın nikelin çözünmesine olan etkileri incelenmiştir. Sodyum florür etkisinde sülfürik asit ortamında nikelin çözünme kinetiğini belirlemek için elde edilen çözünme verimlerine küçülen çekirdek modeli uygulanmıştır. Kinetik çalışmalar sonucunda karışık modelin uygun olduğu belirlenmiştir. Nikelin çözünmesi için aktivasyon enerjisi 41.24 kJ/mol olarak hesaplanmıştır.

Anahtar Kelimeler

Çözünme kinetiği, Lateritik cevher, Nikel, Sülfürik asit, Sodyum florür, Aktivasyon enerjisi

Kaynakça

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