High emissions of NOx are a serious problem for boilers used in the energy sector. To reduce emissions to the level adopted in EU legislation, the combustion process in boilers occurs with a minimum excess of air, which is conducive to the occurrence of the adverse phenomenon of low-oxygen corrosion on piping elements of the boiler's combustion chamber (evaporator).
The Problem
Low-oxygen corrosion occurring in combustion chambers is extremely unfavourable and causes significant degradation of the furnace chamber (evaporator) components, which affects.
The Results
In an effort to eliminate the adverse phenomena coinciding with the rolling process, a team of Plasma System engineers developed a method of applying a chromium carbide (Cr3C2-NiCr) top layer with a hardness of 900-1200 HV0.3 and thickness of 40-60 microns on the working part of roller circumference.
This solution greatly extended the service life of reciprocating rollers, thereby increasing rolling mill output.
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