Optimization of Smithsonite Ore Solubility with Lactic Acid Leaching Reagent

Abstract

In this study, optimum parameters for leaching performance of lactic acid reagent in smithsonite ore were determined using L16 (45) experimental plan in the Taguchi Statistical Method. Since maximum smithsonite ore extraction was desired for the result, Taguchi's 'bigger is better' performance formula was used. In the experiments; parameters affecting dissolution such as temperature, reaction time, particle size, acid concentration and solid/liquid ratio were investigated. When ANOVA analysis was applied to the parameters, it was determined that the most effective parameters according to F values were acid concentration, solid/liquid ratio and particle size, respectively. In addition, it was observed that zinc conversion increased with increasing temperature and decreasing solid/liquid ratio and particle size. The parameter levels that maximized the S/N value were determined to be 30ºC temperature, 0.01 g.mL-1 solid/liquid ratio, 1 M lactic acid concentration,-160.5 µm particle size and 20 min reaction time. Under these conditions, it was found that smithsonite ore was dissolved by 98.85%.

Keywords

• Smithsonite ore
• Organic acid
• Optimization
• Taguchi Method
• Dissolution

Laktik Asit Liç Reaktifi ile Smithsonit Cevherinin Çözünürlüğünün Optimizasyonu

Abstract

Bu çalışmada, laktik asit reaktifinin smithsonit cevherindeki liç performansı için optimum parametreler Taguchi İstatistiksel Yönteminde L16 (45) deney planı kullanılarak belirlenmiştir. Sonuç için maksimum smithsonite cevheri ekstraksiyonu istendiğinden Taguchi'nin 'büyük daha iyidir' performans formülü kullanılmıştır. Deneylerde; sıcaklık, reaksiyon süresi, partikül boyutu, asit konsantrasyonu ve katı/sıvı oranı gibi çözünmeyi etkileyen parametreler incelenmiştir. Parametrelere ANOVA analizi uygulandığında, F değerlerine göre en etkili parametrelerin sırasıyla asit konsantrasyonu, katı/sıvı oranı ve partikül boyutu olduğu belirlenmiştir. Ayrıca, çinko dönüşümünün artan sıcaklık ve azalan katı/sıvı oranı ve partikül boyutu ile arttığı gözlemlenmiştir. S/N değerini maksimize eden parametre seviyeleri 30ºC sıcaklık, 0,01 g.mL-1 katı/sıvı oranı, 1 M laktik asit konsantrasyonu, -160.5 µm partikül boyutu ve 20 dk reaksiyon süresi olarak belirlenmiştir. Bu koşullar altında, smithsonite cevherinin %98.85 oranında çözündüğü bulunmuştur.

Keywords

• Smitsonit cevheri
• Organik asit
• Optimizasyon
• Taguchi Metodu
• Çözünme

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