Research And Implementation Of Dimension Reduction Method On3D Heat Transfer In Blast Furnace Hearth Lining

Blast furnace is the core equipment in steel production. The construction, overhaul and maintenance of BF are costly, ranging from hundreds of million to several billion yuan. Meanwhile, the overhaul cycle is so long. Once blast furnace shutdown, the economic loss will be enormous. Therefore, the longevity of BF is the important thing of international concern.Blast furnace hearth is the basis of the whole and the safety of structure is the main limiting element of BF-life. BF hearth is a sealed container which contains liquid iron. The part which touches liquid iron directly is the lining and the erosion state of lining makes a direct impact on BF hearth structure safety. Researching effective and reliable erosion analysis technology of BF hearth lining to control the erosion state will bring great economic significance. At present, the common erosion models of BF hearth lining are one-dimensional and two-dimensional erosion model. Three-dimensional erosion model can’t be applied because of it’s large computation.Served finding more practical and more accurate erosion analysis technology of BF hearth lining as target, research and implementation of dimension reduction method on3D heat transfer in BF hearth lining were studied deeply and systemically in this dissertation. First of all, by reducing3D heat transfer to the equivalent form of two-dimension with the equivalent heat source "qv", dimension reduction method on3D heat transfer in BF hearth lining was established successfully. Secondly, the quasi3D erosion model of BF hearth lining was established with this dimension reduction method. This erosion model not only has less calculation and high precision in theory, but it is more close to the3D erosion model. Finally, based on the principle of the inverse solution to the heat transfer problem, the quasi3D erosion calculation process of BF hearth lining was established, meanwhile this process was changed into parametric program with APDL. It will improve the computational efficiency through parametric design.In comparison with the results of two dimensional methods, quasi3D method is feasible. However, further research and experimental verification is also needed. If quasi3D method is applied for erosion diagnosis of blast furnace hearth lining, it will bring an upgrade to current two-dimensional method and more powerful technical support for blast furnace production.