Preparation of high performance green alumina ceramic balls by roller production waste

Abstract

To reuse roller waste as a raw material of high performance green ceramic balls, three kinds of white alumina ceramic balls whose wear resistance were 2–3 times of the best high alumina ceramic ball with 90% Al₂O₃ were prepared, and the Al₂O₃ content of the prepared balls was 75%. It is found that the effect of calcia and magnesia on the wear resistance of ceramic balls is contrast to the accepted one: the wear rate of the ceramic balls prepared in CaO-Al₂O₃-SiO₂ system is the lowest and the wear rate of the ceramic balls prepared in MgO-Al₂O₃-SiO₂ is the highest. The main crystal phase of the ceramic ball is mullite and corundum. The ceramic ball granular is uniform and fine with 4–5 μm average size. The pore diameter is about 2 μm. The wear way of the ceramic balls is mainly transcrystalline fracture.

Keywords

roller production waste / alumina ceramic ball / wear resistance / white / transcrystalline fracture

References

[1] Sathiyalumar M., Gnanam F. D. Influence of Additives on Density, Microstructure and Mechanical Properties of Alumina[J]. J. Mat. Proc. Tech., 2003, 133: 282-286.

[2] Medvedovski E. Wear-resistant Engineering Ceramic[J]. Wear, 2001, 249: 821-828.

[3] Qin L., Wu B., Duan X., . Production and Application of Wear-resistant Alumina Ceramic Grinding Balls[J]. J. Wuhan Uni. Tech-Mat. Sci. Edi., 2001, 16(3): 12-15.

[4] Alumina of Hu. Balance In Turbulance Situation Show Uncommon[N]. Future Daily, 27 November, 2003

[5] Bennett J. P., Kwong K.-s. Reusing Spent Refractory Materials[J]. Ceramic Industry, 1997, 11: 46-54.

[6] Bennett J. P., Abbot Maginns M. Recycling/Disposal Issues of Refractories[J]. Ceram. Eng. Sci. Proc., 1995, 16(1): 127-141.

[7] Lu Z. The Avenues to Improve the Properties of 95 wt% Alumina Ceramics and Sinter at Low Temperature[J]. Electronic Components & Materials, 1995, 14(4): 13-17.

[8] Guo J. The Exploration on New Approach of Strengthening and Toughening of Ceramic Materials[J]. J. Inorg. Mat., 1998, 13(1): 23-26.

[9] Liang J. Mineralography[M], 1984. Wuhan: Wunan Library Press. 1 258-1 259.

[10] Semler C. E. Overview of the U.S. Refractories Industry[J]. Ceramic Industry, 1994, 142(2): 33-38.