Effect of ultrasound on separation selectivity and efficiency of flotation

Cilek, Emin Cafer; Özgen, Selçuk

doi:10.1016/j.mineng.2009.06.007

Cited by 63 publications

(22 citation statements)

References 26 publications

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“…The violent collapse of the cavitation bubbles results in a specific environment with extremely high temperature (5000 K) and pressure of up to 1000 atm [24][25][26]. The occurrence of ultrasonic cavitation depends on a number of factors including temperature, surface tension, medium viscosity, hydrostatic pressure, the degree of gas saturation, gas type and a few other minor factors; therefore they are various for different mediums and experimental conditions [24,32,33]. Acoustic streaming is caused by unidirectional flow of currents in a fluid as a consequence of sound waves [34].…”

Section: Application Of Ultrasound Irradiation In Mineral Processingmentioning

confidence: 99%

A New Experimental Approach to Improve the Quality of Low Grade Silica; The Combination of Indirect Ultrasound Irradiation with Reverse Flotation and Magnetic Separation

et al. 2016

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Abstract:Removal of iron impurities in silica is one of the most important issues in the glass industry. The most noted impurities are surface coating and staining on silica particles; additionally, some cases of inclusions are observed. The prepared silica sample, for this research work, mostly was in the size range of 106-425 µm. Mineralogical studies indicated the existence of goethite, hematite, limonite and pyrite as the major iron impurities. The poor liberation degree of silica particles from clays encouraged the use of ultrasound irradiation to improve the efficiency of reverse flotation. The head sample contained 96.98% SiO 2 , 0.143% Fe 2 O 3 , 1.52% Al 2 O 3 , and 0.088% TiO 2 ; Fe 2 O 3 had to be reduced to below 0.04%. The reverse flotation tests were carried out with and without indirect ultrasound irradiation. The lowest Fe 2 O 3 grade of the flotation yield was 0.058% and this was achieved using 2000 g/t of C 4 collector with 15 min conditioning at neutral pH. C 4 consisted of Aero 801, Aero 825, oleic acid and sodium oleate at equal dosage. As a result, a flowsheet was developed to include indirect ultrasound irradiation with reverse flotation and two stages of dry high intensity magnetic separation. In conclusion, the best product contained 98.43% SiO 2 , 0.034% Fe 2 O 3 , 0.90% Al 2 O 3 and 0.051% TiO 2 .

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Section: Application Of Ultrasound Irradiation In Mineral Processingmentioning

confidence: 99%

A New Experimental Approach to Improve the Quality of Low Grade Silica; The Combination of Indirect Ultrasound Irradiation with Reverse Flotation and Magnetic Separation

et al. 2016

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“…Ultrason genellikle ultrasonik banyolar (Gürpınar, 2007;Özkan ve Güngören, 2012) veya problar (Çilek ve Özgen, 2009;Güngören ve ark., 2015;2017,) (Özkan ve Veasey, 1996;Özkan, 2002). Bu durumda da ultrasonik çeviriciden çıkan ultrasonik enerji önce banyonun içerisindeki suya ardından pülpün bulunduğu kaba oradan da pülp içerisine aktarılmakta bu geçişler sırasında enerji kayıpları yaşanmaktadır.…”

Section: Discussionunclassified

Different Approaches in theUse of Ultrasonic Treatments in Flotation

Güngören¹,

Özkan²,

Özdemir³

2017

AKU-J. Sci. Eng.

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ÖzetUltrason insan işitme limitinin üzerindeki frekanslarda yayılan bir ses dalgası olup, yayılmak için maddesel ortama ihtiyaç duyar. Ultrason sıvılar içerisinde yayıldığında çeşitli sıra dışı koşullar yaratır. Bunların başında kavitasyon gelmektedir. Ultrason, cevher hazırlama ve zenginleştirme de dâhil olmak üzere endüstrinin birçok alanında kullanım alanı bulmuştur. Fizikokimyasal bir cevher zenginleştirme yöntemi olan flotasyon, kondisyon, yüzdürme (flotasyon), ürünlerin susuzlandırılması gibi değişik aşamalar içermektedir. Dolayısıyla, kompleks bir sistem olan flotasyonda ultrason kullanımı üzerinde yapılan çalışmalar çeşitlilik göstermiştir. Literatürde ultrason farklı cihazlar, frekanslar, yöntemler kullanılarak flotasyonun değişik aşamalarında ve farklı malzemelerin flotasyonunda uygulanmıştır. Ultrasonun pratikteki etkileri üzerine yoğunlaşan çalışmalar bulunduğu gibi, ultrasonun tane yüzeyine, tane-kimyasal ve tane-kabarcık etkileşimlerine etkisi hakkında yapılan çalışmalar da mevcuttur. Bu çalışmada, ultrasonun flotasyonda kullanımı ile ilgili yapılmış literatürde bulunan önceki çalışmalar derlenmiş, sonuçları karşılaştırılmıştır. Different Approaches in theUse of Ultrasonic Treatments in Flotation KeywordsUltrasound; Cavitation; Energy; Mineral Processing; Flotation. AbstractUltrasound is a sound wave propagates above human perception limit, and requires a material medium to propagate. Ultrasound creates some extraordinary conditions in liquids such as cavitation. Therefore, ultrasound can be used in various industries, including mineral processing. Flotation, which is a physicochemical mineral processing method, contains various stages such as conditioning, floating, and dewatering of products. For these reasons, the studies on the use of ultrasound in flotation in literature have been applied on the flotation of various materials using different devices, frequencies, and methods. There are several studies focused on the practical effects of ultrasound as well as the fundamental studies on the effect of ultrasound on particle-particle, particle-reagent, and bubble-particle interactions. In this study, the studies about the use of ultrasound on flotation have been reviewed in detail.© Afyon Kocatepe Üniversitesi GirişFlotasyon, minerallerin ara-yüzey özelliklerinden yararlanılarak, değerli mineral ile değersiz mineralin birbirinden ayrıldığı katı, sıvı ve gaz fazının bir arada bulunduğu fiziko-kimyasal bir cevher zenginleştirme yöntemidir.

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“…These jets can remove surface coatings from minerals, and even eliminate oxidation (Kang et al, 2009, Cao et al, 2017. Therefore, the use of the ultrasonic application has been investigated by several studies for improving flotation efficiency before flotation (Aldrich and Feng, 1999;Celik et al, 2002) or during flotation (Ozkan and Kuyumcu, 2006, Cilek and Ozgen, 2009, Ozkan et al, 2012Gungoren et al 2017;Ghadyani et al, 2018;Ozun et al, 2019). Nevertheless, a systematic study on the effects of ultrasonic application, especially for mineral mixtures, will be an important contribution to the literature.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effects of ultrasonic energy on the flotation behavior of pyrite and galena minerals

Horasan¹,

Tanriverdi²,

Çiçek³

et al. 2020

Physicochem. Probl. Miner. Process.

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Although pyrite is one of the more abundant minerals of the earth crust, it has low economic value. When it reports to the concentrate during flotation along with the valuable minerals, it decreases the grade of the valuable minerals and leads to an increase in smelting costs. Numerous modifications have been suggested in the literature to increase the selective recovery of pyrite containing base metalsulfide ores. The use of ultrasonic applications is one such method. In this study, the effect of the ultrasonic application on the flotation behavior of galena and pyrite mineral was investigated through systematic Hallimond Tube experiments. In the initial phase of the experiments, the optimum flotation conditions (particle size, pH, amount of air, and amount of reagent) were determined for the two minerals. Subsequent experiments were carried out under these optimums to distinguish the effect of the ultrasonic application. The influence of how the ultrasonic application was applied (i.e. before and during the conditioning stage or before the re-flotation of the concentrate) was also studied. It was observed that the ultrasonic application had a strong activating influence if it was administered before or during the conditioning stage. The effect was similar to whether the minerals were floated individually or from their mixtures. However, when it was applied to a flotation concentrate before reflotation, it selectively displayed a depressant action for the pyrite to the extent that no depressants were needed. The results conclusively showed that the ultrasonic application could drastically improve the selectivity of the complex ores.

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Effect of ultrasound on separation selectivity and efficiency of flotation

Cited by 63 publications

References 26 publications

A New Experimental Approach to Improve the Quality of Low Grade Silica; The Combination of Indirect Ultrasound Irradiation with Reverse Flotation and Magnetic Separation

A New Experimental Approach to Improve the Quality of Low Grade Silica; The Combination of Indirect Ultrasound Irradiation with Reverse Flotation and Magnetic Separation

Different Approaches in theUse of Ultrasonic Treatments in Flotation

Investigating the effects of ultrasonic energy on the flotation behavior of pyrite and galena minerals

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