Walking beam furnace (WBF Sample Clauses

Walking beam furnace (WBF. For the manufacturing of steel products (strip, plate and profiles) steel slabs, billets and blooms are heated in large reheating furnaces. For product quality assurance, energy con- sumption and safety it is important to accurately monitor and control the furnace conditions. For instance it would be of great value to a) be able to follow the material temperature through the different furnace zones and b) to in more detail know the furnace atmosphere in the different zones. Temperature measurements inside reheating or annealing furnaces are very complex, the process conditions are tough and the radiation inside the furnace influence IR pyrometer readings. Steel surfaces both reflect and emit infrared radiation and the radiation intensity effect pyrometer measurements. (Outside the furnace the reflected radiation is much lower and a more accurate temperature measurement is possible.) For tuning purposes accurate temperature measurements are regularly done by using ther- mocouples drilled into test specimens. The specimens equipped with thermocouples can either have long cables feeding into the furnace or being attached to a capsuled logger that can stand heat for some time. The logger commonly xxxxx after a few tests due to production stops or other problems. These self-contained devices are often too heavy to use on thin material due to the weight. Recently a better and lighter encapsulation has been developed using a phase changing material as insulation, but the cost for the system is high and there is a large risk for burning this system with a higher maintenance cost and the cost for a new investment. Figure 3 shows a heated slab that is lifted out of Swerea MEFOS WBF at MEFOS during the Disire campaign in November 2015. Figure 3: An image from the walking beam furnace trials at Swerea MEFOS in November 2015.
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