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[3812-23-10] Feldspar Recovery from Waste of Granite Dimension Stone Quarries at Tak Province, Thailand
Chairman:Richard Alorro (Curtin University)
Keywords:Feldspar recovery, granite waste, quartz, flotation, dimension stone quarries
Feldspar Recovery from Waste of Granite Dimension Stone Quarries at Tak Province, Thailand
Somsak Saisinchai1,aand Dawan Wiwattanadate 1,b
1 Department of Mining and Petroleum Engineering, Chulalongkorn University, Bangkok 10330, Thailand
E-mail: asomsak.sa@chula.ac.th, bdawancu@gmail.com
Abstract:
The present research aims to recover feldspar from waste of granite dimension stone quarries at Nam Ruem and Mai Ngam, Mueang Tak District, Tak Province. The waste has been generated and accumulated up to 4-5 million tons nowadays, causing a huge pile of waste and obstructing the operation area. X-Ray Diffraction (XRD) analysis showed the waste consisted of albite, orthoclase, quartz, and ferrous contaminated minerals such as muscovite, biotite, mica, and garnet. Elemental analysis with X-Ray Fluorescent (XRF) showed that the percentage of grade contained 72.53% SiO2, 15.70% Al2O3, 1.56% Fe2O3, 1.44% CaO, 7.89% K2O and 4.38% Na2O. After crushing with jaw crusher and roll crusher, grinding with ball mill, and screening with vibrating screen, it was found that the crushed waste finer than 60 meshes mainly consisted of albite, orthoclase, and quartz with a yield of 52%. The waste finer than 60 meshes was then sent to remove ferrous contaminated minerals, using wet high intensity magnetic separator, prior flotation to recover feldspar. Up on flotation under condition of 20% solids, hydrofluoric acid (HF) addition to achieve pH 2, using ATD as a collector at 300 grams per ton feed, and 5 minutes conditioning time, the results showed that 63% of feldspar was recovered with composition of 64.36% SiO2, 18.73% Al2O3, 0.06% Fe2O3, 1.44% CaO, 9.89% K2O and 4.91% Na2O, which meet specification for ceramic industry.
Somsak Saisinchai1,aand Dawan Wiwattanadate 1,b
1 Department of Mining and Petroleum Engineering, Chulalongkorn University, Bangkok 10330, Thailand
E-mail: asomsak.sa@chula.ac.th, bdawancu@gmail.com
Abstract:
The present research aims to recover feldspar from waste of granite dimension stone quarries at Nam Ruem and Mai Ngam, Mueang Tak District, Tak Province. The waste has been generated and accumulated up to 4-5 million tons nowadays, causing a huge pile of waste and obstructing the operation area. X-Ray Diffraction (XRD) analysis showed the waste consisted of albite, orthoclase, quartz, and ferrous contaminated minerals such as muscovite, biotite, mica, and garnet. Elemental analysis with X-Ray Fluorescent (XRF) showed that the percentage of grade contained 72.53% SiO2, 15.70% Al2O3, 1.56% Fe2O3, 1.44% CaO, 7.89% K2O and 4.38% Na2O. After crushing with jaw crusher and roll crusher, grinding with ball mill, and screening with vibrating screen, it was found that the crushed waste finer than 60 meshes mainly consisted of albite, orthoclase, and quartz with a yield of 52%. The waste finer than 60 meshes was then sent to remove ferrous contaminated minerals, using wet high intensity magnetic separator, prior flotation to recover feldspar. Up on flotation under condition of 20% solids, hydrofluoric acid (HF) addition to achieve pH 2, using ATD as a collector at 300 grams per ton feed, and 5 minutes conditioning time, the results showed that 63% of feldspar was recovered with composition of 64.36% SiO2, 18.73% Al2O3, 0.06% Fe2O3, 1.44% CaO, 9.89% K2O and 4.91% Na2O, which meet specification for ceramic industry.
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