Properties and Performance of a Mud Gun Mass (Tap Hole Clay) with Respect to the Stable Application of the Product in Blast Furnaces
- 6 Downloads
The new generation of blast furnaces have large volumes, operate at high maximum pressures, and increased blast temperatures. This has resulted in an increase in tapping rate, tapping temperature, and the duration of tapping. This has prompted changes in relation to material and application of refractories in cast house particularly in tap hole clays. The mud gun mass is prone to early erosion and therefore to obtain a trouble free cast, a good and strong tap hole mass with appropriate physical and chemical properties is required. The main physical need is to achieve trouble free tapping of hot metal, and for there to be a constant tap hole length during the tap hole opening operation, which usually takes an hour and ten minutes. Additionally there should be smooth flow of the hot metal and slag. The delivery speed of the hot needs to be as smooth as possible. These are physical requirements to protect the hearth of the blast furnace.
This paper deals with the design, performance criteria, property evaluation, and application of a mud gun mass at blast furnace tap hole sites.
Keywordstap hole length erosion stable tapping spitting
Unable to display preview. Download preview PDF.
- Yogi, Oht Subu, Yanemoto, K. et al.: Tap hole clay for blast furnace. Proc. Inter. Refractory Congress (IREFCON), Kolkata (India), February (2010) 118–120Google Scholar
- Murilo Justus, S., de Melo Souza, A. et al.: Development of the new ecological binder system for tap hole mixes. Proc. Inter. Refractory Congress (IREFCON), Kolkata, India, February (2010) 130–134Google Scholar
- Chatterjee, U.K., Das, R.C., Biswas, S., Fauzdar, S. et al.: Critical evaluation of tap hole clay of “F” blast furnace at Tata Steel. Proc. Ann. Session of Indian Ceram. Soc., Jamshedpur, December (2005) 145–152Google Scholar
- Das Gupta, A., Chongdar, S., Banerjee K.P.: An evaluation of some mud gun mass from medium integrated steel plants, and a comparison with a product developed at VRL Bangalore. Iron and Steel Rev. 53 (2009)  255–260Google Scholar
- Wang Cheng et al.: Development and application of castables for B.F. trough and iron runners. Proc. 2nd Inter. Conf. on Refractory (ICRJ), Jamshedpur (India), November (2010) 90–92Google Scholar
- Gilada, R., Dutta, S.K.: Role of Anti-oxidants in carbon containing refractory — a review. Iron and Steel Rev. 49 (2005)  272–273Google Scholar
- Kumar, A., Khan, S.A., Biswas, S.: Experience in tap hole operation at Tata Steel Proc. 2nd Inter. Conf. on Refractory (ICRJ), Jamshedpur (India), November (2010) 104–109Google Scholar