Development and Application of Andalusite-Based Bricks for the Rotary Hearth Furnace of a Wheel and Axle Plant

R. K. Pradhan1, D. Mustafi2, D. Halder3, I. Roy3

1 IFICO, SAIL Refractory Unit (SRU), Steel Authority of India Ltd./India
2 Durgapur Steel Plant (DSP), Steel Authority of India Ltd./India
3 Research and Development Centre for Iron & Steel (RDCIS), Steel Authority of India Ltd. (SAIL)/India


Volume 8, Issue 1, Pages 87 - 91


High alumina bricks with superior RUL (refractoriness under load), high thermal shock resistance and high volume stability have been developed as an alternate refractory material to imported semi-silica bricks to use in sprung arch type roof of rotary hearth furnace of the wheel and axle plant of Durgapur Steel Plant/IN. This has been developed at first in laboratory and then manufactured in industrial scale. Laboratory investigations reveal that adequate mullite phase content and absence of free quartz are major contributors to its superior quality. In the second phase, around 100 t of developed quality bricks were produced in IFICO plant of SAIL Refractory Unit (SRU) and were applied in the furnace roof. Several field trials were conducted and finally the plant switched over to this quality bricks for its encouraging performance. In addition to this, it is being an import-substitution and in-house developed product; it leads to substantial economic benefit to the organization.


mullite, rotary hearth roof, high thermal shock resistant, high alumina refractory


[1] Xiong, X.-Y.; Van Den Heever, D.: A refractory raw material andalusite: properties and application. Advances in refractories. V 5th Int. Symposium, October 3–6, 2010, Vancouver, Canada, 119–129 [2] Tassot, P.; et al.: Refractory solutions for rotary hearth furnaces. Proceedings UNITECR, 2005 [3] Anggono, J.: Mullite ceramics. Its properties, structure and synthesis. Lecture, Industrial Engineering, Mechanical Engineering Department, Petra Christian University [4] Hagen, R.; et al: Mullite formation, hightemperature properties of andalusite alumina based LCC and ULCC. J. Ceram. Soc. of Japan, 112 (2004) [10b] 517–532 [5] Okada, K.; Otsuka, N.: Formation process of mullite. In: Ceramic Transactions Vol. 6: Mullite and Mullite Matrix Composites. Westerville/OH 1990, 375–387 [6] Ismail, M.G.M.U.; Nakai, Z.; Minegishi, K.: Synthesis of mullite powder and its characteristics. Int. J. High Technol. Ceram. 2 (1986) [2] 123–134 [7] Hamano, K.; Sato, T.; Nakagawa, Z.: Properties of mullite prepared by co-precipitation and microstructure of fired bodies. J. Ceram. Soc. Of Japan 94 (1986) 818–822 [8] Okada, K.; Otsuka, N.; Somiya, S.: Recent mullitization studies in Japan: A review. Amer. Ceram. Soc. Bull. 70 (1991a) [10] 2414–2418


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