Abstract
Abstract The induration furnace is one of the most important devices in the pellet production system. It is responsible for ensuring the quality of pellets produced, since a high level of thermal energy is necessary to reach the physical properties needed. Therefore, the refractory lining performance is important to guarantee the quality of pellets and to avoid thermal losses. Minor failures in the refractory lining may result in serious damage, if it not previously identified and repaired. This article was written to explain a preventive technique to identify and repair such minor issues with the refractory lining before escalation. The use of this technique in the proper frequency may result in furnace life cycle extension.
Highlights
The production of iron ore and steel has significantly expanded in recent years, in developing countries such as China and India, resulting in a large increase in the demand for iron ore
G Anderson and C.A Brackelsberg (CAPPEL & LUNGEN, 1999) and consists in agglomerating the ultrafine iron ore, bellow 0.045mm, in order to achieve a product with suitable size distribution to be used directly in reduction reactors
It is possible to verify that the hot spots were located mainly in the corners of the structure, indicating that most failures in the refractory lining start at its borders
Summary
The production of iron ore and steel has significantly expanded in recent years, in developing countries such as China and India, resulting in a large increase in the demand for iron ore. Since 1950, it has been possible to observe that there is an increasing occurrence of low grade material. Such material requires more complex beneficiation steps to concentrate and so, at the same time, more ultrafine iron ore (pellet feed) needs to be processed, mainly in the new projects (MOURÃO, 2008). G Anderson and C.A Brackelsberg (CAPPEL & LUNGEN, 1999) and consists in agglomerating the ultrafine iron ore, bellow 0.045mm, in order to achieve a product with suitable size distribution to be used directly in reduction reactors
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