Correlation between Natural Floatability and Static Contact Angle of Sulfide Minerals

doi:10.12972/ksmer.2014.51.2.240

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2014 Vol.51, Issue 2 Preview Page Next Page

Research Paper

Correlation between Natural Floatability and Static Contact Angle of Sulfide Minerals 황화광물의 정적 접촉각과 자연부유도와의 상관성: 정문영·오수현·문재운
Moon Young Jung, Su Hyun Oh, Jai Woon Moon

30 April 2014. pp. 240-247

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Abstract

The static contact angles of sulfide minerals were measured by sessile drop method. It was important to fix water drop size and contact time in order to exclude the measurement errors. Despite flat samples made from pure sulfide minerals, variations in contact angles occurred according to the measurement positions. It seems that it is mainly due to the heterogeneity and roughness of mineral surfaces. The negative values of work of adhesion which were estimated from Young-Dupre equation using the water contact angles of sulfide minerals increased in the order of pyrite < sphalerite < galena < chalcopyrite. And the natural floatability measured using the Hallimond tube grew in the order of sphalerite ≤ pyrite < galena < chalcopyrite. Namely, the work of adhesion estimated from the static contact angles relatively corresponds to the natural floatability.

Keywords

Sulfide minerals

Static contact angle

Work of adhesion

Natural floatability

Sessile drop법으로 황화광물표면의 정적 접촉각을 측정할 경우에는 측정오차를 배제하기 위해서 물방울의 크기 및 접촉시간을 고정하는 것이 중요하였다. 순수하다고 판단되는 황화광물 시료를 취하여 평탄하게 제조한 시편인데도 불구하고 측정위치에 따라 접촉각이 13° 차이를 보이고 있었다. 이는 주로 광물 표면의 이질성 및 거칠기 때문에 나타나는 현상으로 볼 수 있다. 황화광물 시료의 물방울 접촉각을 이용하여 Young-Dupre식으로부터 추정된 기포 부착일의 음수값은 황철석 < 섬아연석 < 방연석 < 황동석의 순서로 증가하였다. 그리고 Hallimond tube를 이용하여 측정한 자연부유도는 섬아연석 ≤ 황철석 < 방연석 < 황동석의 순서로 증가하였다. 즉, 황화광물의 자연부유도와 정적 접촉각으로부터 추정된 기포의 부착일은 비교적 잘 부합되었다. 따라서 황화광물의 접촉각 연구는 복합 황화광의 부유선별에 있어 의미 있는 자료로 활용될 수 있을 것으로 기대된다.

키워드

황화광물

정적 접촉각

부착일

자연부유도

References

Adamson, A.W. and Gast, A.B., 1997, Physical Chemistry of Surfaces, sixth ed. John Wiley & Sons, New York.
Chau, T.T., 2009, “A review of techniques for measurement of contact angles and their applicability on mineral surfaces,” Minerals Engineering, Vol. 22, pp. 213-219.
Chung, H.S., 2013, 표면물리화학, 도서출판 오비기획, Deajeon, pp. 170-206.
Drelich, J., Miller, J.D. and Good, R.J., 1996, “The effect of drop (bubble) size on advancing and receding contact angles for heterogeneous and rough solid surfaces as observed with sessile-drop and captive-bubble techniques,” J. of Colloid and Interface Science, Vo. 179, pp. 37-50.
Hayes, R.A. and Ralston, J., 1988, “The collectorless flotation and separation of sulphide minerals by Eh control,” Inte. J. of Mineral Processing, Vol. 23, pp. 55-84.
Jung, M.Y., Lee, K.Y. and Shin, H.Y., 2007, “Flotation properties of galena and pyrite with xanthate as a collector,” J. of the Korea Society for Geosystem Engineering, Vol. 44, No. 1, pp. 46-52.
Kelebek, S. and Yoruk, S., 2002, “Bubble contact angle variation of sulphide minerals in relation to their self-induced flotation,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 196, pp. 111-119.
Luttrell, G.H. and Yoon, R.H., 1984, “Surface studies of the collectorless flotation of chalcopyrite,” Colloids and Surfaces, Vol. 12, pp. 239-254.
Marmur, A., 1998, “Contact angle hysteresis on heterogeneous smooth surfaces: theoretical comparison of the captive bubble and drop methods,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 136, pp. 209-215.
Meiron, T.S., Marmur, A. and Sam Saguy I., 2004, “Contact angle measurement on rough surfaces,” J. of Colloid and Interface Science, Vol. 274, pp. 637-644.
Prestidge, C.A. and Ralston, J., 1995, “Contact angle studies of galena particles,” J. of Colloid and Interface Science, Vol. 172, pp. 302-310.
Prestidge, C.A. and Ralston, J., 1996, “Contact angle studies of particulate sulphide minerals,” Mineral engineering, Vol. 9, pp. 85-102.
Rao, S.R., 2004, Surface Chemistry of Froth Flotation, 2nd ed., Kluwer Academic/Plenum Publishers, New York, Vol. 2, pp. 351-384.
Sutherland, K.L. and Wark, I.W., 1955, Principles of flotation, Aust. IMM, Melbourne, p. 489.
Ulusoy, U. and Yekeler, M., 2007, “Floatability of barite particles with different shape and roughness,” Indian J. of Chemical Technology, Vol. 14, No. 6, pp. 616-625.
Wills, B.A., 1997, Mineral processing technology(6th), Butterworth-Heinemann, Oxford, p. 264.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 51
No :2
Pages :240-247
DOI :https://doi.org/10.12972/ksmer.2014.51.2.240

[1] Adamson, A.W. and Gast, A.B., 1997, Physical Chemistry of Surfaces, sixth ed. John Wiley & Sons, New York.

[2] Chau, T.T., 2009, “A review of techniques for measurement of contact angles and their applicability on mineral surfaces,” Minerals Engineering, Vol. 22, pp. 213-219.

[3] Chung, H.S., 2013, 표면물리화학, 도서출판 오비기획, Deajeon, pp. 170-206.

[4] Drelich, J., Miller, J.D. and Good, R.J., 1996, “The effect of drop (bubble) size on advancing and receding contact angles for heterogeneous and rough solid surfaces as observed with sessile-drop and captive-bubble techniques,” J. of Colloid and Interface Science, Vo. 179, pp. 37-50.

[5] Hayes, R.A. and Ralston, J., 1988, “The collectorless flotation and separation of sulphide minerals by Eh control,” Inte. J. of Mineral Processing, Vol. 23, pp. 55-84.

[6] Jung, M.Y., Lee, K.Y. and Shin, H.Y., 2007, “Flotation properties of galena and pyrite with xanthate as a collector,” J. of the Korea Society for Geosystem Engineering, Vol. 44, No. 1, pp. 46-52.

[7] Kelebek, S. and Yoruk, S., 2002, “Bubble contact angle variation of sulphide minerals in relation to their self-induced flotation,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 196, pp. 111-119.

[8] Luttrell, G.H. and Yoon, R.H., 1984, “Surface studies of the collectorless flotation of chalcopyrite,” Colloids and Surfaces, Vol. 12, pp. 239-254.

[9] Marmur, A., 1998, “Contact angle hysteresis on heterogeneous smooth surfaces: theoretical comparison of the captive bubble and drop methods,” Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 136, pp. 209-215.

[10] Meiron, T.S., Marmur, A. and Sam Saguy I., 2004, “Contact angle measurement on rough surfaces,” J. of Colloid and Interface Science, Vol. 274, pp. 637-644.

[11] Prestidge, C.A. and Ralston, J., 1995, “Contact angle studies of galena particles,” J. of Colloid and Interface Science, Vol. 172, pp. 302-310.

[12] Prestidge, C.A. and Ralston, J., 1996, “Contact angle studies of particulate sulphide minerals,” Mineral engineering, Vol. 9, pp. 85-102.

[13] Rao, S.R., 2004, Surface Chemistry of Froth Flotation, 2nd ed., Kluwer Academic/Plenum Publishers, New York, Vol. 2, pp. 351-384.

[14] Sutherland, K.L. and Wark, I.W., 1955, Principles of flotation, Aust. IMM, Melbourne, p. 489.

[15] Ulusoy, U. and Yekeler, M., 2007, “Floatability of barite particles with different shape and roughness,” Indian J. of Chemical Technology, Vol. 14, No. 6, pp. 616-625.

[16] Wills, B.A., 1997, Mineral processing technology(6th), Butterworth-Heinemann, Oxford, p. 264.

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