Browse > Article

Effect of oxalic acid on the iron content of pottery stone  

Kim Kyung-Nam (삼척대학교 신소재공학과)
Park Hyun (삼척대학교 신소재공학과)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.14, no.6, 2004 , pp. 257-261 More about this Journal
Abstract
The pottery stones from the Taebek area consist of abundant quartz with kaolinite. In this study, the characteristics of pottery stones were examined by XRD (X-ray diffractometer), XRF (X-ray fluorescence spectrometer), TG-DTA and SEM (Scanning Electron Microscope). The chemical compositions of the raw ore showed 71.75 wt%$SiO_2$, 22.10 wt%$Al_2O_3$, 1.86 wt%CaO, 2.97 wt%$K_2O$, 0.62 wt%$Fe_2O_3$. When pottery stone of 3 mm size was leached at $80^{\circ}C$ with 10 % oxalic acid, the content of $Fe_2O_3$ was reduced from 0.62 wt% to 0.24 wt% and the whiteness was enhanced. Grinding of pottery stone was conducted by a planetary ball mill using media of zirconia, the average particle size was 2～5 $\mu\textrm{m}$.
Keywords
Pottery stone; Planetary ball mill; $Fe_2O_3$; Oxalic acid;
Citations & Related Records
연도 인용수 순위
  • Reference
1 E.C. Baumgartner, 'Mechanism of dissolution of magnetic by oxalic acid-ferrous ion solution', Inorg. Chem. 26 (1987) 3713   DOI
2 N.P. Kook, S.O. Lee and B.S. Shin, 'Iron removal of low grade pottery stone by flotation process', J. KIME 35 (1998) 143
3 Y,G. Oh, S.M. Park, H.J. Sung and D.U. Kim, 'Natural resources present state and raw ore quality of domestic pottery stone', Ceramist 2(3) (1999) 62
4 Nishyama, T., et al., 'Lithium-bearing tosudite', Japan Clay and Clay Minerals 23(1975) 337   DOI
5 H.S. Lee, Y.J. Chung and G.Y, Shin, 'Structure Analysis on chongsong pottery stone', Yonsei Engineering Report 12(1) (1980) 69
6 J. lannicelli and P. Aboytes, 'Process for bleaching clay', U. S. Patent 3 193(1965) 344
7 J.Y, Hwang and Y,Y, Jeong, 'Occurrence and mineralogical properties of clay minerals in the gosari pottery stones mine in taebek, kangweon-do', J. Miner. Soc. Korea 7 (1994) 97
8 E.K. Cundy, 'Processing of clay', U. S. Patent 3 450 (1969) 247
9 O.H. Han and D.S. Kim, 'Purification of pttery stone by classification and magnetic separation', J. KIME 35 (1998) 201
10 R.E Conley and M.K. Lloyd, 'Improvement of iron leaching in clay', I & EC Process Des. and Dev. 9(5) (1970) 595   DOI
11 J. lannicelli, 'High extraction magnetic filtration of kaolin clay', Clays and Clay Minerals 24 (1976) 64   DOI
12 S.G. Tsimas, 'Reducing the iron content of kaolin from milos, greece, by a hydro-metallurgical process', Trans. Instn. Min. Metl. 104 (1995) 110