TY  - JOUR
T1  - Effect of Chloride Salt Ions onto Coal Flotation based on Contact Angle and Bubble-Particle Attachment Time
TT  - Klorür Tuz İyonlarının Temas Açısı ve Kabarcık-Tane Yapışma Süresi Açısından Kömür Flotasyonuna Etkisi
AU  - Özdemir, Orhan
AU  - Güngören, Can
AU  - Baktarhan, Yasin
AU  - Şahpaz, Oktay
AU  - Kurşun Ünver, İlgin
AU  - Özkan, Şafak Gökhan
PY  - 2022
DA  - May
DO  - 10.21205/deufmd.2022247119
JF  - Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi
JO  - DEUFMD
PB  - Dokuz Eylül Üniversitesi
WT  - DergiPark
SN  - 1302-9304
SP  - 553
EP  - 562
VL  - 24
IS  - 71
LA  - en
AB  - This study was aimed to reveal the effect of K+, Na+, Ca2+, and Mg2+ ions on the bubble-particle interactions of high-rank coal with contact angle and bubble-particle attachment time studies. The results for the contact angle experiments indicated that the contact angle of the coal, which was 62° in the absence of ions, increased slightly in the presence of mono- and divalent ions and reached a maximum (67°) in the presence of 1∙10-1 mol/dm3 Mg2+, and the effect of K+ ions on the contact angle was minimal. Furthermore, the results for the bubble-particle attachment time experiments showed that the bubble-particle attachment time of coal, which was measured as 4.5 ms in the absence of ions, decreased as a function of ion concentration from 1∙10-2 mol/dm3 to 1 mol/dm3. While the bubble-particle attachment times of coal particles in the presence of K+/Na+ and Ca2+/Mg2+ at low concentrations were around 2-3 ms and 1-2 ms, respectively, the increase in the concentration slightly changed the attachment time which decreased to less than 1 ms except for K+ ions. Overall, it can be concluded from this study that the effect of these dissolved ions in water was more prominent on the bubble-particle attachment time of the coal particles rather than the contact angle which showed no significant change. Also, the specific ion effect was determined as “Mg2+ > Ca2+ > Na+ > K+” in terms of the bubble-particle interactions in the presence of these ions.
KW  - Chloride Salt Ions
KW  - Coal
KW  - Flotation
KW  - Bubble-Particle Attachment Time
KW  - Contact Angle
N2  - Bu çalışma, K+, Na+, Ca+2 ve Mg+2 iyonlarının yüksek kaliteli kömürün kabarcık-tane etkileşimleri üzerindeki etkisini, temas açısı ve kabarcık-tane yapışma süresi çalışmaları ile ortaya koymayı amaçlamıştır. Temas açısı deney sonuçları, iyon yokluğunda 62° olan kömürün temas açısının, bir ve iki değerlikli iyonların varlığında hafifçe arttığını, 1∙10-1 mol/dm3 Mg+2 varlığında maksimuma (67°) ulaştığını ve K+ iyonunun temas açısı üzerindeki etkisinin minimum olduğunu göstermiştir. Ayrıca, kabarcık-tane yapışma süresi deney sonuçları, iyon yokluğunda 4,5 ms olarak ölçülen kömürün kabarcık-tane yapışma süresinin, iyon konsantrasyonunun bir fonksiyonu olarak 1∙10-2 mol/dm3 ile 1 mol/dm3 arasında azaldığını göstermiştir. K+/Na+ ve Ca+2/Mg+2 varlığında düşük konsantrasyonlarda kömür tanelerinin kabarcık-tane yapışma süreleri sırasıyla 2-3 ms ve 1-2 ms civarındayken, konsantrasyondaki artış yapışma süresini biraz değiştirmiş ve K+ iyonları hariç 1 ms’nin altına düşürmüştür. Genel olarak, bu çalışmadan, sudaki bu çözünmüş iyonların etkisinin önemli bir değişiklik göstermeyen temas açısından ziyade, kömür tanelerinin kabarcık-tane yapışma süresi üzerinde daha belirgin olduğu sonucuna varılabilir. Ayrıca bu iyonlar varlığında kabarcık-tane etkileşimleri açısından spesifik iyon etkisi “Mg+2 > Ca+2 > Na+ > K+” olarak belirlenmiştir.
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UR  - https://doi.org/10.21205/deufmd.2022247119
L1  - http://dergipark.org.tr/tr/download/article-file/1968285
ER  -