O Prolongado Teste De Co-Injecao De Sintetico Tio2 Com Premisturado E Ulverizado Carvao Para Preventivo Proteçao De Cardinho Dos Altos Fornos De Rogesa /Dillinger Hütte Em Dillingen, Alemanha

Abstract

At ROGESA blast furnaces a mixture of pulverized coal and synthetic titanium dioxide is injected simultaneously in order to protect the hearth from premature erosion. Sachtleben has developed, in the form of RUTILIT, a fine-particle synthetic source of titanium dioxide which can be systematically injected into the zone of damage in the blast furnace hearth via the tuyeres. Thanks to its great particle fineness, RUTILIT has good rheological (flow) properties, permitting pneumatic conveyance. At The ROGESA-Ironmaking Plant a new technology has been developed in order to use the grinding and injection facilities not only for pulverized coal but also for titanium products. This achieves a quick and cost-effective repair of the damage of the hearth refractory, and thus a reduction of temperature in the hearth area. This paper is a common report from AG der Dillinger Hüttenwerke (Rogesa) and Sachtleben Chemie GmbH, Duisburg. It examines the benefits of a long term coinjection of pulverized coal and synthetic Titanium dioxide (RUTILIT) at Blast Furnace No. 4 and No. 5.