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Combustion phenomena in the race way of the blast furnace; Palamisilmioet masuunin hormeilla

Technical Report:

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  More>>
Publication Date:
Oct 01, 1993
Product Type:
Technical Report
Report Number:
OY/PT-REP-130
Reference Number:
SCA: 014000; 010500; PA: FI-93:003253; EDB-94:011568; NTS-94:007785; ERA-19:002971; SN: 93001063797
Resource Relation:
Other Information: DN: SULA Research Programme; PBD: 1993
Subject:
01 COAL, LIGNITE, AND PEAT; BLAST FURNACES; COMBUSTION; COKE; FUEL OILS; COAL; INJECTION; PARTICLE SIZE; MATHEMATICAL MODELS; 014000; 010500; PRODUCTS AND BY-PRODUCTS
OSTI ID:
10111650
Research Organizations:
Oulu Univ. (Finland). Dept. of Process Engineering
Country of Origin:
Finland
Language:
Finnish
Other Identifying Numbers:
Other: ON: DE94702054; ISBN 951-42-3642-4; TRN: FI9303253
Availability:
OSTI; NTIS
Submitting Site:
FI
Size:
61 p.
Announcement Date:
Jun 30, 2005

Technical Report:

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}
}