GAS APPLICATION
The combustion air necessary for the process is enriched with oxygen and introduced into the region of the melting zone via tuyeres or wind nozzles. To ensure the predetermined oxygen content in the combustion air, the controls of the oxygen supply communicate with the furnace controls. Messer’s Oxijet-supersonic lances, which feed the oxygen directly into the furnace, are used. The controlled Oxijet process was developed in order to be able to accurately control oxygen levels even at supersonic entry.
Oxygen enrichment creates the following advantages when used with a shaft furnace:
Reduction in coke rate
Improved performance
Reduces post-combustion burden
Faster reaction speeds
Greater flexibility
Raised temperatures in the melting zone
Even temperature distribution across the shaft cross-section
Lower production costs
Lower emissions
Oxijet-technology has been installed over 40 times in cupola and shaft furnaces, with 3 of these in the copper industry.
MESSER SOLUTION
In addition to the gases required for your process, Messer offers a variety of equipment for its optimisation under the brand names Oxipyr and Oxijet.
In order to select the optimum system, experts from Messer first carry out a comprehensive process analysis. Following calculations and basic engineering, suggestions are made for optimisation and further procedures.
Controlled (Pulsating) Oxijet
Oxygen is introduced directly into the furnace via lances with the oxygen exit velocity in the supersonic range. The lava lances used only generate the required impulse when there is a defined design point. Pulsation guarantees consistent oxygen content in the air/oxygen mixture.
Oxipyr – Burner Technology
Oxipyr-burners shorten the cold start time of shaft furnaces.
Oxipyr-burners are used in combination with dust feed systems. Dust feed lances and high momentum burners together form one unit.
Advantages:
Higher combustion efficiency
Higher melting rate
Faster heating-up times
Lower fuel consumption
Higher processing temperatures possible
Faster reaction speeds
Lower exhaust gas levels
Less dust
Lower emissions
Lower production costs
The characteristics of the burner types are multi-faceted and range from low to high momentum burners, oxyfuel to oxygen/air mixing burners and burners for different fuels or fuel combinations. The systems are controlled manually, semi- or fully automatically following compositions or temperature.
