ENTRAINMENT MODEL OF FINE GANGUE PARTICLES IN A FLOTATION COLUMN WITH NEGATIVE BIAS

Yıl 2025, Cilt: 33 Sayı: 2, 1865 - 1873, 22.08.2025

Kemal Bilir , Bahri Öteyaka

https://doi.org/10.31796/ogummf.1700919

Öz

This study investigated the entrainment of fine gangue particles in a modified (negative bias) flotation column. Entrainment is the unintentional transfer of fine gangue particles to the concentrate during flotation processes, and reduces the concentrate quality. The study aims to determine the operating variables affecting entrainment and develop an empirical model to predict the entrainment percentage. The effects of operating variables such as superficial water rise rate, particle size, airflow rate, and frother amount on entrainment were systematically investigated. The results showed that entrainment increased exponentially with increasing superficial water rise rate, entrainment decreased with increasing particle size, and entrainment increased linearly with increasing airflow rate and frother amount. Using the experimental data, an empirical equation was developed to model the relationship between operating variables and entrainment. A good agreement was observed between experimental and model-predicted entrainment values, confirming that the developed model is effective in predicting entrainment in negatively biased flotation columns. This study's findings contribute to a better understanding and control of the flotation process, thus providing important information for improving concentrate quality in industrial applications.

Anahtar Kelimeler

Flotation column , Negative bias , Entrainment , Fine size gangue , Empirical model

NEGATİF BİASLI FLOTASYON KOLONUNDA İNCE GANG TANELERİNİN SÜRÜKLENME MODELİ

Öz

Bu çalışmada, modifiye (negatif biaslı) flotasyon kolonunda ince gang tanelerinin sürüklenmesi araştırılmıştır. Sürüklenme, flotasyon işlemleri sırasında ince gang tanelerinin istem dışı konsantreye taşınması olayıdır ve konsantre kalitesini düşürmektedir. Araştırmanın amacı, sürüklenmeyi etkileyen çalışma değişkenlerini belirlemek ve sürüklenme yüzdesini tahmin etmek için ampirik bir model geliştirmektir. Yüzeysel su yükselme hızı, tane boyutu, hava debisi ve köpürtücü miktarı gibi çalışma değişkenlerinin sürüklenme üzerindeki etkileri sistematik olarak araştırılmıştır. Sonuçlar, yüzeysel su yükselme hızının artmasıyla sürüklenmenin üssel olarak arttığını, tane boyutunun artmasıyla sürüklenmenin azaldığını, hava debisi ve köpürtücü miktarının artmasıyla sürüklenmenin doğrusal olarak arttığını göstermiştir. Deneysel veriler kullanılarak, çalışma değişkenleri ile sürüklenme arasındaki ilişkiyi modelleyen bir ampirik eşitlik geliştirilmiştir. Deneysel ve modelden tahmin edilen sürüklenme değerleri arasında iyi bir uyum gözlenmiştir, bu da geliştirilen modelin negatif biaslı flotasyon kolonlarında sürüklenmeyi tahmin etmede etkili olduğunu doğrulamaktadır. Bu çalışmanın bulguları, flotasyon sürecinin daha iyi anlaşılmasına ve kontrol edilmesine katkı sağlayarak, endüstriyel uygulamalarda konsantre kalitesinin iyileştirilmesine yönelik önemli bilgiler sunmaktadır.

Anahtar Kelimeler

Flotasyon kolonu , Negatif bias , Sürüklenme , İnce boyutlu gang , Ampirik model

Kaynakça

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