Abstract
The mean point of the `Combustion phenomena in the race way of the blast furnace` -project was to clear up combustion phenomena in the race way of the blast furnace so that oil injection could be increased without problems and oxygen enrichment could be optimised better. Project was accomplished with co-operation of combustion laboratories of Aabo Akademi and VTT Technical Research Centre of Finland. If combustion is out of control solid matter can be formed. This can make permeability in the blast furnace worse. Several models can be used to calculate the burning of oil droplet to maximise the oil injection. Calculation models developed in VTT in Jyvaeskylae have been used in this work. Burning with different process parameters can be compared with these models and apply the results to race way zone. The droplet has a time period of 7 - 15 ms time to burn in the race way when the blast speed is 210 m/s. The spreading of the blast gas coming to race way extends the delay time. In literature it has been shown that the delay time in the race way can be even i 0 ms when the gas speed in the bottom of
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Citation Formats
Ollila, S, and Haerkki, J.
Combustion phenomena in the race way of the blast furnace; Palamisilmioet masuunin hormeilla.
Finland: N. p.,
1993.
Web.
Ollila, S, & Haerkki, J.
Combustion phenomena in the race way of the blast furnace; Palamisilmioet masuunin hormeilla.
Finland.
Ollila, S, and Haerkki, J.
1993.
"Combustion phenomena in the race way of the blast furnace; Palamisilmioet masuunin hormeilla."
Finland.
@misc{etde_10111650,
title = {Combustion phenomena in the race way of the blast furnace; Palamisilmioet masuunin hormeilla}
author = {Ollila, S, and Haerkki, J}
abstractNote = {The mean point of the `Combustion phenomena in the race way of the blast furnace` -project was to clear up combustion phenomena in the race way of the blast furnace so that oil injection could be increased without problems and oxygen enrichment could be optimised better. Project was accomplished with co-operation of combustion laboratories of Aabo Akademi and VTT Technical Research Centre of Finland. If combustion is out of control solid matter can be formed. This can make permeability in the blast furnace worse. Several models can be used to calculate the burning of oil droplet to maximise the oil injection. Calculation models developed in VTT in Jyvaeskylae have been used in this work. Burning with different process parameters can be compared with these models and apply the results to race way zone. The droplet has a time period of 7 - 15 ms time to burn in the race way when the blast speed is 210 m/s. The spreading of the blast gas coming to race way extends the delay time. In literature it has been shown that the delay time in the race way can be even i 0 ms when the gas speed in the bottom of the race way is about 10 m/s. The main point comparing the calculated oil drop burning results got from VTT models is that the droplet size of oil is the most important thing in burning. If the droplet size is too big the pyrolysis process will not be complete before oxygen has been exhausted and the pyrolysis gases don`t burn in the race way. These gases can cause troubles when they can get in the shaft. They can become soot that moves to the blast furnace gas and causes troubles in the permeability of the blast furnace and the dust cleaning system. Burning of the char is probably not a problem if pyrolysis gases have burnt completely. According to the calculations performed with the VTT models oxygen enrichment does not effect the pyrolysis}
place = {Finland}
year = {1993}
month = {Oct}
}
title = {Combustion phenomena in the race way of the blast furnace; Palamisilmioet masuunin hormeilla}
author = {Ollila, S, and Haerkki, J}
abstractNote = {The mean point of the `Combustion phenomena in the race way of the blast furnace` -project was to clear up combustion phenomena in the race way of the blast furnace so that oil injection could be increased without problems and oxygen enrichment could be optimised better. Project was accomplished with co-operation of combustion laboratories of Aabo Akademi and VTT Technical Research Centre of Finland. If combustion is out of control solid matter can be formed. This can make permeability in the blast furnace worse. Several models can be used to calculate the burning of oil droplet to maximise the oil injection. Calculation models developed in VTT in Jyvaeskylae have been used in this work. Burning with different process parameters can be compared with these models and apply the results to race way zone. The droplet has a time period of 7 - 15 ms time to burn in the race way when the blast speed is 210 m/s. The spreading of the blast gas coming to race way extends the delay time. In literature it has been shown that the delay time in the race way can be even i 0 ms when the gas speed in the bottom of the race way is about 10 m/s. The main point comparing the calculated oil drop burning results got from VTT models is that the droplet size of oil is the most important thing in burning. If the droplet size is too big the pyrolysis process will not be complete before oxygen has been exhausted and the pyrolysis gases don`t burn in the race way. These gases can cause troubles when they can get in the shaft. They can become soot that moves to the blast furnace gas and causes troubles in the permeability of the blast furnace and the dust cleaning system. Burning of the char is probably not a problem if pyrolysis gases have burnt completely. According to the calculations performed with the VTT models oxygen enrichment does not effect the pyrolysis}
place = {Finland}
year = {1993}
month = {Oct}
}