Anod Çamurundaki Bakırın H2SO4 Çözeltilerinde Çözündürülmesi Esnasında Nikelin Davranışı

Öz

Bu çalışmanın amacı, Taguchi yöntemi ile ham anod çamurundaki bakırın oksijenli/oksijensiz ortamında H2SO4 çözeltilerinde liç edilmesi esnasında nikelin liçingi ve optimizasyonunu incelemektir. Sonuçların değerlendirilmesinde Taguchi deneysel tasarımı kullanılmış olup deney planı olarak L18(21*37) ortogonal dizisi belirlenmiştir. Son zamanlarda sıkça kullanılmakta olan Taguchi yönteminin geleneksel deneysel tasarım yöntemlerine göre bazı önemli avantajları vardır. Ön denemeler ışığı altında; reaksiyon sıcaklığı, karıştırma hızı, kavurma sıcaklığı, asit konsantrasyonu gibi bir takım parametreler seçilmiştir. Nikelin liçingine yönelik belirlenen parametreler ve optimum şartları şöyledir: pedal sayısı 2, reaksiyon sıcaklığı 70 °C, O2 debisi 5,03×10−6 m3s-1, karıştırma hızı 450 dak-1, asit konsantrasyonu % 10,86 (w/w), katı-sıvı oranı 0,20 g.mL-1, reaksiyon süresi 3600 s ve kavurma sıcaklığı 600 °C. Deneysel sonuçlar, optimum liç koşulları altında nikel ekstraksiyonunun % 80,0 olduğunu göstermiştir.

Anahtar Kelimeler

• Bakırı Giderilmiş Anod Çamuru
• Sülfürik Asit
• Nikel Liçingi
• Taguchi Deneysel Tasarımı
• Optimizasyon

Behavior of Nickel During Dissolution of Copper in Anode Slime in H2SO4 Solutions

Abstract

The aim of this study is to investigate the leaching and optimization of nickel during the leaching of copper in the raw anode slie in H2SO4 solutions in an oxygenated/oxygen-free medium with the Taguchi method. Taguchi experimental design was used in the evaluation of the results and the L18(21*37) orthogonal array was determined as the experimental plan. The Taguchi method, which has been used frequently recently, has some important advantages over traditional experimental design methods. Under the light of preliminary tests; Some parameters such as reaction temperature, stirring speed, roasting temperature, acid concentration were selected. The parameters and optimum conditions for nickel leaching are as follows: number of pedals 2, reaction temperature 70 °C, O2 flow rate 5.03×10−6 m3s-1, stirring speed 450 min-1, acid concentration 10.86 % (w/w ), solid-liquid ratio 0.20 g.mL-1, reaction time 3600 s and roasting temperature 600 °C. Experimental results showed that nickel extraction was 80.0 % under optimum leaching conditions.

Keywords

• Decopperized anode slime
• Sulfuric Acid
• Nickel Leaching
• Taguchi Experimental Design
• Optimization

Kaynakça

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