Study of Modification of High Temperature Melting Compound Steel Slag-Fly Ash

Abstract:

Reconstruction of high temperature melting compound steel slag-fly ash can be effectively digest f-CaO in steel slag. The experimental result shows that the f-CaO contents in modified slag is greatly affected by fly ash addition(respectively 5%, 7%, 14%) when the temperature is 1580°C and constant temperature is 30min, the digestion rates are respectively 56.99%,63.69%,68.55%. Modified mineral content of the steel slag changes greatly, mainly reflects at enormous increase in magnetite, dicalcium silicate, tricalcium silicate, wustite and vitreous. By micro-structure analysis of several kinds of modified slag mineral, tricalcium silicate mainly shape for branch of tree, dicalcium silicate is in the form of a circular, wustite and vitreous mainly distribute in aggregation state. The above minerals can increase cementitious activity for modified slag becoming cement.

• Periodical: Advanced Materials Research (Volumes 291-294)
• Pages: 1851-1855
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.291-294.1851
• Online since: July 2011
• Authors: Yue Long, Yan Shi, Yun Bo Lei, Hong Wei Xing, Jie Li, Yu Zhu Zhang
• Keywords: f-CaO, Fly Ash (FA), Steel Slag, Test

References

[1] Lili Tan, Lanlan Xu, Chunxia Cui. Shanxi building, 2006,32(1):181-182.(In chinese)

[2] Motz H, Geiseler J. Waste Management, 2001, 21(3): 285-288.

[3] Huadong Meng, Liu Liu. Steelmaking. 2009,25(6):74-76.(In chinese)

[4] Tao Feng, Huisheng Shi, Fuzhong Fan. Building Materials, 1999,2 (3):187-191. (In chinese)

[5] Shaoqi Zhou. The principles and technology of controlling solid waste pollution [M]. Beijing: Tsinghua University Press, 2009.

[6] Bingming Li, Zhaofeng Li, Ying Wei, etc. Ceramic Society. 2009，28(3): 589-593．(In chinese)