Three-dimensional Inverse Method Of Blast Furnace Lining Erosion And Its Realization

Blast furnace is the major equipment in the iron-smelting industry, the security of blast furnace hearth is the main limiting element at the stage of campaign. Evaluation of blast furnace life is a very important indicator. The long blast furnace campaign not only extends the longevity of the blast furnace production cycle and saves funds for construction, but also ensures the safe production, therefore, extending the life of blast furnace iron production has become an important issue need to be resolved. The long service life of blast furnace depends on the life of blast furnace lining life, it is essential to determine the situation of lining erosion.The state of blast furnace lining erosion predictions are anti-boundary heat conduction problems. Now, the lined with erosion of the one and two-dimensional inverse methods have been more mature, but the erosion of three-dimensional inverse method has not been evolved. Three-dimensional morphology of inner corrosion in liner that best reflects the actual state of erosion, because the three-dimensional inverse method has important practical significance, this exploratory study is carried out.This paper studied a lot about the erosion analysis of hearth lining and inverse heat conduction problems on the basis of the literature, according to the basic principles of inverse on erode, described the three-dimensional method of the inverse principle of erosion and the calculation process.Based on the actual hearth erosion morphology with three-dimensional space, through the three-dimensional modeling software Pro/E, established the parameters of the erosion surface, formed the geometric model of hearth heat transfer and established a numerical model of heat transfer calculation, then by checking the temperature of the temperature measuring points, modified the erosion surface, until the calculation procedure for complete. In order to achieve the above three-dimensional inverse calculation of erosion processes, carried out the following tasks:1. Using the Pro/E software to achieve the parameters of the input for three-dimensional coordinates of points, obtained the parameterized surfaces by the spline connection, then got the three-dimensional model of lining erosion.2. According to the above method, established two types of three-dimensional model of lining erosion, namely:the simulated hearth, the simulated hearth and the simulated pot-type model, the simulated elephant-type model. Base on the calculated results, obtained two types of comparison chart about the different sections of the one and three-dimensional methods, discussed the difference on one and three-dimensional methods.3. This paper collected the correlation datas of the second type model on different sections with one and three-dimensional methods, reconstructed two typical models and recalculated the reconstructed model. Checking the temperature of the temperature measuring points, if the calculation didn’t meet the approved accuracy, modified erosion surface until met the accuracy, and ultimately realized the three-dimensional inverse method.Although there is no realization of automation in the process of model reconstruction, The calculation result proves that the three-dimensional inverse method can be used for the diagnosis of blast furnace lining erosion, within the the scope of precision, which not only improves the inverse method in the application of inner-lining erosion, but also provides a theoretical reference in the erosion of lining for three-dimensional visualization.