INVESTIGATION OF NICKEL DISSOLUTION FROM LATERITIC ORE IN SULPHURIC ACID MEDIA USING TAGUCHI METHOD

Yıl 2018, Cilt: 3 Sayı: 27, 1 - 10, 24.12.2018

Tevfik Ağaçayak , Ali Aras

Öz

In this study, the dissolution of nickel from
lateritic ore in sulphuric acid media using different conditions was
investigated. Leaching time, stirring speed, temperature, sulphuric acid
concentration and particle size were selected as experimental parameters. The orthogonal
array (OA) experimental design plan was determined as L₁₆. 16
leaching experiments were carried out with this experimental design under
different conditions. Considering the metal dissolution recoveries (MDR)
obtained from the results, signal/noise (S/N) ratios of each test condition
were calculated and the analysis of mean and optimization studies were
performed. As a result of the optimization works it was seen that the maximum
MDR and S/N ratio were obtained in Test 10. 
After, this results were compared with the verification experiment. As a
result of the leaching tests performed under the optimization conditions, it
was determined that the S/N ratio was 38.97 and the metal dissolution recovery
(MDR) was 88.97%. In addition, variance analysis (ANOVA) was applied to the
test results and the percentage contributions of each factor for the extraction of nickel were determined

Anahtar Kelimeler

Taguchi method, leaching, lateritic nickel ore

TAGUCHI METODU KULLANILARAK SÜLFÜRİK ASİT ORTAMINDA LATERİTİK CEVHERDEN NİKEL ÇÖZÜNMESİNİN İNCELENMESİ

Öz

Bu
çalışmada, lateritik cevherden sülfürik asitli ortamda nikelin farklı
koşullarda çözündürülmesi araştırılmıştır. Deney parametreleri olarak; süre,
karıştırma hızı, sıcaklık, sülfürik asit derişimi ve tane boyutu
seçilmiştir.  Ortogonal dizi (OD)
deneysel tasarım planı L₁₆ olarak belirlenmiştir. Bu deneysel
tasarım ile farklı şartlarda 16 adet liç deneyi gerçekleştirilmiştir.
Sonuçlardan elde edilen metal çözünme verimleri (MÇV) göz önüne alınarak, her
test koşulunun sinyal/gürültü (S/G) oranları hesaplanarak anlamlılık analizleri
(ANOM) ve optimizasyon çalışmaları gerçekleştirilmiştir. Optimizasyon
çalışmaları sonucunda en yüksek MÇV’nin ve S/G oranının Test 10’da elde
edildiği görülmüş ve doğrulama deneyi ile karşılaştırılmıştır. Optimizasyon
şartlarında yapılan liç testleri sonucunda (S/G) oranının 38,97 ve metal
çözünme veriminin (MÇV) ortalama %88,97 olduğu
belirlenmiştir. Ayrıca, deney sonuçlarına varyans analizi (ANOVA)
uygulanmış ve her faktörün nikel çözündürülmesine olan katkısı belirlenmiştir.

Anahtar Kelimeler

Taguchi metodu, liç, lateritik nikel cevheri

Kaynakça

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