SPLASH CONTROL
Fast, effective and reproducible decarburisation in RH requires a controlled lowering of the vacuum pressure. The pressure control must not distort the off-gas analysis. The steel producer should not suffer from skull build-up in the vacuum vessel, when operating a RH with very short decarburisation time.STANDARD SOLUTION:
- Pressure control by either introducing an artifical air leakage of suitable size or recirculating the process gas.
DISADVANTAGE:
- Process can not be judged properly, as off-gas analysis and off-gas flow are distorted.
SOLUTION:
RH-SC® by SMS MevacCONCEPT:
- Reduction of RH vessel pressure as fast as possible with an acceptable level of splashing
- Vacuum pressure control using ejectors with variable suction capacity
- Equally distributed Argon lift gas with smallest possible gas bubbles in the snorkel
- Individual lift gas line control
ADVANTAGE:
- Short decarburisation time
- High plant availability (splashing on acceptable level)
- Off-gas flow rate is measured properly
- Gas analysis values are measured properly
- Continously working needle valve in the steam nozzles saves steam
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