THE


REFRACTORIES ENGINEER


• With added EMSIL-DRY, the microsilica-gel bonded NCC exhibit excellent explosion resistance. A perfect 400kgs block was produced with no problems using a fast firing program (20°C to 850°C at a heating rate of 50°C). This confirms that the microsilica-gel bond system contains only small amounts of bound water. Once the free water is removed, the castables can be fired at very high heating rates.


REFERENCES


1. S. Banerjee, C. W. Connors. Composition and method for manufacturing steel-containment equipment. US Patent 5147830. September 15; (1992).


2. B. Myhre and K. Sunde, “Alumina based castables with very low contents of hydraulic compound. Part II.“ Strength and High- Temperature Reactions of No-cement Castables with Hydraulic Alumina and Microsilica”, Proc. UNITECR´95, Kyoto, Japan, Nov. 19-22 (1995), p. II/317-24


3. M. R. Ismael, R. D.Anjos, R .Salomão, V. C. Pandolfelli, Colloidal silica as a nano-structured binder for refractory castables, Refract. Appl. News 11 (4) (2006) 16-20.


4. M. W. Anderson, S. Shah. Pumpable casting composition and method of use. US Patent 5494267. February 27, (1996).


5. C. W. Connors, M. W. Anderson. Colloidal silica refractory system for an electric arc furnace. US Patent 6528011. March 04, (2003).


6. 7.


B. Myhre, “Microsilica-gel bond castables for rapid heat-up.” Proc. 48th Symp. On Ref. Am. Ceram. Soc . (2012), p. 135-145.


B. Myhre and Hong Peng, “Microsilica-gel bond castables with potentials.” Proc. 49th Symp. On Ref. Am. Ceram. Soc 2015, p.112- 121.


8. B. Myhre, “Strength development of bauxite-based ultralow- cement castables.” Am. Ceram. Soc. Bull., Vol. 73. No. 5, (1994) 68-73.


9. H. Peng and B. Myhre, “Microsilica-gel bonded refractory castable with improved setting behaviour and mechanical properties.” Refractories World Forum, vol. 3, (2015) 69-75.


10. H. Peng and B. Myhre, “Further development of microsilica-gel bonded non-cement castables.” January 2016, REFRACTORIES ENGINEER, p. 22-25.


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September 2019 Issue 27


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