Beneficiation of quartz from tailing of kaolinite processing
การแต่งแร่ควอรตซ์จากแร่ทิ้งของกระบวนการแต่งแร่ดินขาว

Lek Sikong, Assoc. Prof., D. of Mining and Metallurgical Eng., F. of Eng., PSU.
Kiatpipat Na-Nakorn, The Siam Cement Public Co., Ltd., Saraburi, Thailand

Published : Songklanakarin J Sci Technol 2000, 22(1) : 83-93
Key words : quartz from tailing of kaolinite processing, quartz processing, beneficiation of quartz, upgraded quartz from tailing, quartz

The purpose of this investigation was to upgrade quartz mineral from tailing of spiral classi-fiers of kaolinite processing plant of The Mineral Resources Development Co.Ltd. (MRD) in Ranong province. It was found from the study that the tailing sample contained particle size over 100 mesh about 94% of total weight and was composed of quartz 61-90%, iron-bearing minerals such as muscovite and biotite (mica) about 4-16%, tourmaline 1-3%, kaolinite 5-13%, and feldspar less than 2% . In quartz processing, samples were divided into 2 size ranges of size over than 35 mesh (about 70.4% of total weight) and that of -35+100 mesh. For the first one, kaolinite was removed by using wet screening and then mica and tourmaline were separated from quartz by means of Mclean magnetic separator. Minerals at size range of - 35+100 mesh kaolinite was firstly removed and finally, the 2 stages flotation was applied to the concentrate from the magnetic separator in order to achieve purer quartz concentrate. By both processes, the quality of quartz concentrate reached the industrial specification.

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