INFLUENCES OF GRINDING CONDITIONS ON GALENITE-SPHALERITE FLOTATION KINETICS

Işıl Tokcan; Volkan Bozkurt

Makale detayları

INFLUENCES OF GRINDING CONDITIONS ON GALENITE-SPHALERITE FLOTATION KINETICS

Yazarlar:

Işıl Tokcan | Volkan Bozkurt

Yayıncı:

Eskişehir Osmangazi University

Ana Başlıklar:

Yer Bilimleri ve Jeoloji Mühendisliği (Diğer)

Dergi:

Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi Vol.31 Issue 1, pp.519-532

Belge Tipi:

Makale

Yayın Tarihi:

4/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001288557

pISSN:

2630-5712

Anahtar kelimeler:

Özet:

 Grinding is more than just crushing, it is also a process that causes a chemical reaction on the surface of the mineral. Water used in the grinding process significantly affects the galvanic interaction. Different grinding conditions result in different pulp chemistries. This becomes especially important in sulfide flotation in terms of recovery and selectivity. There are limited studies examining the effects of dry and wet grinding prior to the flotation of sulfide minerals. This study compared the effects of wet and dry grinding on the flotation kinetics of complex Pb-Zn sulfide ore at P80 of 20 and 50 µm grind sizes. Results showed that dry grinding positively affected the sphalerite ore flotation compared to wet grinding in terms of recovery and grade in both galenite and sphalerite rougher flotation stages. Considering that the effect of dry grinding was due to the difference in pulp chemistry, the reasons were explored based on particle morphology, and pulp potentials. The results showed that grinding the same ore under dry and wet conditions significantly affected the flotation performance. In light of the pulp potential measurements, it was determined that the reducing environment obtained in the wet grinding negatively affected the flotation performance, while the oxidizing environment formed during the dry grinding affected the flotation performance positively. This was attributed to the fact that galvanic interactions that occurred during wet grinding were significantly reduced during dry grinding. Hence, better galenite and sphalerite flotation was obtained following dry grinding.

 Grinding is more than just crushing, it is also a process that causes a chemical reaction on the surface of the mineral. Water used in the grinding process significantly affects the galvanic interaction. Different grinding conditions result in different pulp chemistries. This becomes especially important in sulfide flotation in terms of recovery and selectivity. There are limited studies examining the effects of dry and wet grinding prior to the flotation of sulfide minerals. This study compared the effects of wet and dry grinding on the flotation kinetics of complex Pb-Zn sulfide ore at P80 of 20 and 50 µm grind sizes. Results showed that dry grinding positively affected the sphalerite ore flotation compared to wet grinding in terms of recovery and grade in both galenite and sphalerite rougher flotation stages. Considering that the effect of dry grinding was due to the difference in pulp chemistry, the reasons were explored based on particle morphology, and pulp potentials. The results showed that grinding the same ore under dry and wet conditions significantly affected the flotation performance. In light of the pulp potential measurements, it was determined that the reducing environment obtained in the wet grinding negatively affected the flotation performance, while the oxidizing environment formed during the dry grinding affected the flotation performance positively. This was attributed to the fact that galvanic interactions that occurred during wet grinding were significantly reduced during dry grinding. Hence, better galenite and sphalerite flotation was obtained following dry grinding.

 Grinding is more than just crushing, it is also a process that causes a chemical reaction on the surface of the mineral. Water used in the grinding process significantly affects the galvanic interaction. Different grinding conditions result in different pulp chemistries. This becomes especially important in sulfide flotation in terms of recovery and selectivity. There are limited studies examining the effects of dry and wet grinding prior to the flotation of sulfide minerals. This study compared the effects of wet and dry grinding on the flotation kinetics of complex Pb-Zn sulfide ore at P80 of 20 and 50 µm grind sizes. Results showed that dry grinding positively affected the sphalerite ore flotation compared to wet grinding in terms of recovery and grade in both galenite and sphalerite rougher flotation stages. Considering that the effect of dry grinding was due to the difference in pulp chemistry, the reasons were explored based on particle morphology, and pulp potentials. The results showed that grinding the same ore under dry and wet conditions significantly affected the flotation performance. In light of the pulp potential measurements, it was determined that the reducing environment obtained in the wet grinding negatively affected the flotation performance, while the oxidizing environment formed during the dry grinding affected the flotation performance positively. This was attributed to the fact that galvanic interactions that occurred during wet grinding were significantly reduced during dry grinding. Hence, better galenite and sphalerite flotation was obtained following dry grinding.

 Öğütme, sadece kırmanın ötesinde, mineralin yüzeyinde kimyasal reaksiyona neden olan bir işlemdir. Öğütme işleminde kullanılan su, galvanik etkileşimi önemli ölçüde etkiler. Farklı öğütme koşulları, farklı pülp kimyalarının oluşmasına neden olmaktadır. Bu durum özellikle sülfürlü mineral flotasyonunda verim ve seçimlilik açısından önem arz etmektedir. Flotasyon öncesi kuru ve yaş öğütmenin, sülfürlü mineral flotasyonu üzerindeki etkilerini inceleyen sınırlı sayıda çalışma bulunmaktadır. Bu çalışmada, yaş ve kuru öğütmenin P80 20 ve 50 µm tane boyutundaki kompleks sülfürlü galenit-sfalerit flotasyon kinetiği üzerindeki etkileri karşılaştırılmıştır. Sonuçlar, kuru öğütmenin hem galenit hem de sfalerit flotasyon devrelerinde verim ve tenör açısından yaş öğütmeye kıyasla flotasyon performansını olumlu etkilediğini göstermiştir. Gözlemlenen olumlu etkinin pülp kimyasındaki farklılıktan kaynaklandığı düşünülerek sonuçlar tane morfolojisi ve pülp potansiyeli özelinde araştırılmıştır. Sonuçlar, önceki çalışmada kullanılan 50 µm boyutundaki numunelerin galenit flotasyon devresinden elde edilen sonuçları ile karşılaştırmalı olarak verilerek tartışılmıştır. Elde edilen bulgular, aynı cevherin farklı koşullar altında öğütülmesinin flotasyon performansı üzerinde önemli etkileri olduğunu göstermektedir. Pülpün elektrokimyasal ölçümleri ışığında yaş öğütmede oluşan indirgeyici ortamın flotasyon performansını düşürdüğü belirlenmiştir. Kuru öğütme işlemi sırasında yeni açığa çıkan mineral yüzeyleri su, pH veya Eh gibi kimyasal reaksiyonlardan etkilenmez ve böylece flotasyon verimi olumlu yönde etkilenir. Öğütme sırasında oluşan oksitleyici ortam nedeniyle galenit-sfalerit minerallerinin yüzebilirliği artmaktadır.

Makale detayları

INFLUENCES OF GRINDING CONDITIONS ON GALENITE-SPHALERITE FLOTATION KINETICS

Yazarlar:

Işıl Tokcan | Volkan Bozkurt

Yayıncı:

Eskişehir Osmangazi University

Ana Başlıklar:

Yer Bilimleri ve Jeoloji Mühendisliği (Diğer)

Dergi:

Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi Vol.31 Issue 1, pp.519-532

Belge Tipi:

Makale

Yayın Tarihi:

4/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001288557

pISSN:

2630-5712

flotation

dry grinding

wet grindingflotasyon

kuru öğütme

yaş öğütme

Sayı

Makale detayları

INFLUENCES OF GRINDING CONDITIONS ON GALENITE-SPHALERITE FLOTATION KINETICS

Yazarlar: Işıl Tokcan | Volkan Bozkurt

Yayıncı: Eskişehir Osmangazi University

Ana Başlıklar: Yer Bilimleri ve Jeoloji Mühendisliği (Diğer)

Dergi: Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi Vol.31 Issue 1, pp.519-532

Belge Tipi: Makale

Yayın Tarihi: 4/2023

Belge Dili: İngilizce

Document ID (Org No.): 2001288557

pISSN: 2630-5712

flotation

dry grinding

wet grindingflotasyon

kuru öğütme

yaş öğütme

Sayı

Yazarlar:

Işıl Tokcan | Volkan Bozkurt

Yayıncı:

Eskişehir Osmangazi University

Ana Başlıklar:

Yer Bilimleri ve Jeoloji Mühendisliği (Diğer)

Dergi:

Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi Vol.31 Issue 1, pp.519-532

Belge Tipi:

Makale

Yayın Tarihi:

4/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001288557

pISSN:

2630-5712