Farklı Tip Flotasyon Hücrelerinde Köpük Görüntüsü İle Flotasyon Performansı Arasındaki İlişkinin İncelenmesi

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Tarih
2024-06-25
Yazar
Güney, Egemen
Ambargo Süresi
Acik erisim
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Özet
Within the scope of this master thesis, the relationships between froth variables and the flotation performances of the flash flotation cell, the first and last cells of the rougher flotation bank in a gold flotation plant using a commercial froth camera system were investigated. In the literature, there is no study investigating the relationship between the flotation performance of the flash flotation cell and froth variables. Therefore, this master thesis is the first study to investigate the relationship between froth variables and flotation performance of the flash flotation cell. The measurement and sampling surveys were carried out for the flash flotation cell, the first cell and the last cell of the rougher flotation circuit in the flotation plant. There are differences between each of the investigated cells due to both their mechanical design and their position in the plant circuit. In the flash cell, flotation of fast floating material is achieved. High grade and fast floating particles are recovered from the first cell of the rougher bank and the slow floating particles from the last cell of the bank. For this reason, both the flotation performance and the froth structure of each cell are unique. It was observed that the froth formed in the flash flotation cell surface was brighter and had higher stability compared to the other cells examined in the study, while serious stability problems were observed in the froth formed on surface of the last cell of the rougher flotation circuit. In this respect, considering the visual differences between the froths formed on the surfaces of the flotation cells, understanding the relationship between the flotation performance of each cell and the froth structure is an important step towards better control of the cells. The operational conditions (pulp level, air flowrate and frother dosage) of the flotation cells were varied for each test. This resulted in changes in both the flotation performances and the froth structures of the investigated cells. In order to determine the performance of the cells under the new operational conditions, sampling campaign were carried out around the investigated cell. During sampling, the froth surface of the cell was analyzed by Stone Three Froth Image System MK5 to obtain bubble velocity, bubble size, froth color and froth height values. Thus, the relationship between the flotation performance and the froth surface variables of each flotation cell under varying operational conditions was studied. As a result of the study, the relationships between the flotation performance and froth surface variables under the varied operational conditions in each cell were revealed. It was observed that bubble velocity was the froth variable that gave the highest correlations with flotation performance indicators (mass pull, grade, etc.) in each cell. The relationship between bubble velocity and flotation performance indicators showed differences for each cell. The flotation behavior of the cells was interpreted via the bubble velocity variable. Also, the average bubble size was found to be different for each flotation cell. The effect of the change in operational conditions on the bubble size was particularly evident in the frother dosage tests carried out in the first cell of the rougher flotation circuit.
Bağlantı
https://hdl.handle.net/11655/35992
Koleksiyonlar
Künye
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