Medium Characteristics on Selective Grinding of Low Grade Bauxite


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Selective grinding of bauxite with ratio of Al2O3/SiO2(A/S) 4.4 at ball mill were studied in order to investigate the effect of grinding media characteristics on selective grinding of bauxite. Results show that when diameter of ball media is Φ15mm, selective grinding effect is best and at this moment A/S of the product at -0.5+0.28mm granularity is up to 7.5. Ball/powder weight ratio, charge rate, and size composition of grinding media have little influences on particle size composition of powder product, but have great influences on the A/S at different granularity powder product. At condition of size composition of grinding media Φ30mm:Φ20mm:Φ15mm=20%:50%:30% and charge rate 40%, the grinding results are best and at the moment ωAl2O3/SiO2 is up to 7.5, yield 27%, and Al2O3 recovery 30%.



Edited by:

Xianjun Lu and Jun Qiu






Y. M. Zhu et al., "Medium Characteristics on Selective Grinding of Low Grade Bauxite", Advanced Materials Research, Vol. 158, pp. 159-166, 2011

Online since:

November 2010




[1] Kahn H, Tassinari M M L and Ratti G: Characterization of bauxite fines aiming to minimize their iron content [J]. Mineral Engineering, NO. 16 ( 2003), p.1313.

DOI: 10.1016/j.mineng.2003.07.009

[2] Rao R B: Novel approach for the beneficiation of fer2ruginous bauxite by microwave [J]. Minerals and Metallurgical Processing, NO. 13(1996), p.103.

[3] Eygeles M A, et al: Selective flotation of kaolinite – hydrargillite [J]. Tsvetnye Met,NO. 1 (1970), p.84.

[4] Ishchenko V V,et al: Action of sodium hexametap Hosp Hate and sodium oleate on bauxite minerals [J]. Izv. Vyssh. Ucheb. Zaved. Tsvet Met. NO. 15 (1972), p.8.

[5] Longfeng L, et al: The beneficiation of accumulative diaspore ore- desilication and elimination of the iron content [J]. J. Central-South Inst. Min. Metall. NO. 4 (1980), p.82.

[6] A. Alp and A.O. Aydin: EffOct of Alkaline Additives on the Thermal Properties of Bauxite, Thermal. Anal., NO. 53(1998), p.141.

[7] Hong, G.: Ore properties of Henan bauxite and their influence on ore dressing and metallurgy. Mining & Metallurgy, NO. 1 (2002), p.27.

[8] Liu, C.M. and Ma, F.Y.: Development and the progress of study of grinding aids. Journal of Xinjiang Institute of Technology, NO. 2 (1995), p.79.

[9] Luo, G.F., in: Basic crystallography and mineralogy, edtied by Nanjing: Nanjing University Publishing House (1993).

[10] Liu, X.W., Hu, Y.H. and Jiang, H., et al.: Crystal structure and su~[bee property of kaolinie in hard kaolins and soft kaolins. The Chinese Journal of Nonferrous Metals, NO. 4 (2001), p.684.

[11] Ou, L.M., Feng, Q.M. and Lu, Y.P., et al.: Bauxite cracking mode and selective separation oJ aluminum and silicon minerals. Metal Mine, NO. 2(2005), p.28.

[12] Pan, Z.L.: Crstallography and mineralogy, edtied by Beijing: Geology Publishing House (1993).

[13] Wei, X.C., Han, Y.X. and Yin, W.Z., et al.: Research status and developments of silion removal from bauxite in mineral processing. Gold Journal, NO. 4 (2001 ), p.269.

[14] Wei X.C., Han, Y.X. and Yin, W.Z., et al.: Experimental research on the selective grinding of Henan bauxite. Gold Journal, NO. 3 (2001), p.192.

[15] Yin W.Z.: Foundational research on selective grinding and flotation separation of bauxite, Ph.D. thesis., Northeastern University, Shenyang, China, (2002), p.21.

[16] Yin, W.Z., Han, Y.X. and Wei, X.C., et al.: The crystal chemical analysis of the flotability of diasporite and kaolinite. Metal Mine, NO. 6(2001), p.29.

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