Mineralogical Analysis and Mechano-Chemical Purification of Natural Silica Ore for High Purity Silica Powder

Jesik Park; Churl Kyoung Lee; Hyun-Kwon Lee

Korean Journal of Materials Research, Vol.26, No.6, 306-310, June, 2016

DOI10.3740/MRSK.2016.26.6.306 Export Citation

Mineralogical Analysis and Mechano-Chemical Purification of Natural Silica Ore for High Purity Silica Powder

Jesik Park, Churl Kyoung Lee , and Hyun-Kwon Lee^†

School of Materials Science and Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi-si, Gyeongsangbuk-do 39177, Republic of Korea

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To produce 4N grade high-purity silica powder from natural ore, the mineralogical characteristics of natural silica ore were investigated and their effects on the purification process were revealed. The Chinese silica mineral ore used was composed of iron and aluminum as main impurities and calcium, magnesium, potassium, sodium, and titanium as trace impurities; these trace impurities generally exist as either single oxides or complex oxides. It was confirmed that liberation and acidic washing of the impurities were highly dependent on the particle size of the ground silica ore and on its mineralogical characteristics such as the distribution and phases of existing impurities. It is suggested that appropriate size reduction of silica ore should be realized for optimized purification according to the origin of the natural silica ore. A single step purification process, the mechano-chemical washing (MCW) process, was proposed and verified in comparison with the conventional multi step washing process.

Keywords:silica;purification;mineralogical analysis;impurity distribution

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[Related Articles]

[1] Yong L, Yu-lian W, Yan-fu Q, Qian L, Bang-gui G, Yue-feng LV, Journal of Anhui Science and Technology University, 2, (2008).

[2] Manfred N, Rehfeld G, U.S, Patent No. 4177235, (1979).

[3] Akira S, Yuki N, Yoshio A, Shunro N, U.S. Patent No. 4676964, (1987).

[4] Makoto T, Kenji T, Masao K, U.S. Patent No.5458864, (1995).

[5] Veglio F, Passariello B, Abbruzzese C, Ind. Eng. Chem. Res., 38(11), 4443 (1999)

[6] Taxiarchou M, Panias D, Douni I, Paspaliaris I, Kontopoulos A, Hydrometallurgy, 46(1), 215 (1997)

[7] Farmer AD, Collings AF, Jameson GJ, Ultrason. Sonochem., 7, 243 (2000)

[8] Hyun JY, Jeong SB, Chae YB, J. Miner. Soc. Korea., 19, 1 (2006)

[9] Mcallister RW, U.S. Patent No. 2537904 (1951).

[10] Taxiarchou M, Panias D, Douni I, Paspaliaris I, Kontopoulous A, Hydrometallurgy, 44, 287 (1997)

[11] Kheloufi A, Fathi M, Rahab H, Kefaifi A, Keffous A, Medjahed SA, Chem. Eng. Trans., 32, 889 (2013)

[12] Santos IC, Goncalves AP, Silvasantos C, Almeida M, Afonso MH, Cruz MJ, Hydrometallurgy, 23, 237 (1990)

[13] Kheloufi A, Berbar Y, Kefaifi A, Sid AM, Kerkar F, Proceedings of the 10th Int. Conf. on Chemical & Process Engr., (2011).

[14] Liu G, Zhang W, Ma Z, Lu Y, Non-Ferrous Mining and Metallurgy, 6, 26 (2007)