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Title: Blast furnace injection developments in British Steel

Abstract

British Steel has four integrated steel works, i.e., Llanwern, Port Talbot, Scunthorpe, Teesside, with a total of ten blast furnaces, nine of which are currently operating. The furnaces range in size from the 14 meters (45 feet 11 inches) hearth diameter Redcar No. 1 furnace at Teesside (a single furnace works) to the 8.33 meters (27 feet 4 inches) hearth Queen Mary and Queen Bess furnaces at Schunthorpe, with a total of four furnaces at that works. All have injection systems installed, those at Scunthorpe being equipped with granular coal injection and all others currently working with oil injection. The driving force behind the development of blast furnace injection has been as a means for introducing reducing agents (British Steel now refers to coke plus hydrocarbon injectants as total reductants) into the process as a part substitute/supplement for top charged coke and the technology is still being developed and used for that purpose. By utilizing practical experience and observing the work of others, British Steel has been assessing blast furnace injection technology experimentally for purposes other than the introduction of reducing agents.

Authors:
Publication Date:
OSTI Identifier:
485028
Report Number(s):
CONF-960983-
TRN: IM9727%%196
Resource Type:
Conference
Resource Relation:
Conference: Blast furnace injection symposium, Cleveland, OH (United States), 10-12 Nov 1996; Other Information: PBD: 1996; Related Information: Is Part Of Blast furnace injection symposium: Proceedings; PB: 254 p.
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 02 PETROLEUM; BLAST FURNACES; FUEL SUBSTITUTION; METAL INDUSTRY; COAL; FUEL OILS; IRON ORES; PERFORMANCE TESTING; PILOT PLANTS; FUEL FEEDING SYSTEMS; OXYGEN ENRICHMENT

Citation Formats

Jukes, M.H. Blast furnace injection developments in British Steel. United States: N. p., 1996. Web.
Jukes, M.H. Blast furnace injection developments in British Steel. United States.
Jukes, M.H. Tue . "Blast furnace injection developments in British Steel". United States. doi:.
@article{osti_485028,
title = {Blast furnace injection developments in British Steel},
author = {Jukes, M.H.},
abstractNote = {British Steel has four integrated steel works, i.e., Llanwern, Port Talbot, Scunthorpe, Teesside, with a total of ten blast furnaces, nine of which are currently operating. The furnaces range in size from the 14 meters (45 feet 11 inches) hearth diameter Redcar No. 1 furnace at Teesside (a single furnace works) to the 8.33 meters (27 feet 4 inches) hearth Queen Mary and Queen Bess furnaces at Schunthorpe, with a total of four furnaces at that works. All have injection systems installed, those at Scunthorpe being equipped with granular coal injection and all others currently working with oil injection. The driving force behind the development of blast furnace injection has been as a means for introducing reducing agents (British Steel now refers to coke plus hydrocarbon injectants as total reductants) into the process as a part substitute/supplement for top charged coke and the technology is still being developed and used for that purpose. By utilizing practical experience and observing the work of others, British Steel has been assessing blast furnace injection technology experimentally for purposes other than the introduction of reducing agents.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 1996},
month = {Tue Dec 31 00:00:00 EST 1996}
}

Conference:
Other availability
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  • British Steel generally operates seven blast furnaces on four integrated works. All furnaces have been equipped with comprehensive instrumentation and data logging computers over the past eight years. The four Scunthorpe furnaces practice coal injection up to 170 kg/tHM (340 lb/THM), the remainder injecting oil at up to 100 kg/tHM (200 lb/THM). Distribution control is effected by Paul Wurth Bell-Less Tops on six of the seven furnaces, and Movable Throat Armour with bells on the remaining one. All have at least one sub burden probe. The blast furnace operator has a vast quantity of data and signals to consider andmore » evaluate when attempting to achieve the objective of providing a consistent supply of hot metal. Techniques have been, and are being, developed to assist the operator to interpret large numbers of signals. A simple operator guidance system has been developed to provide advice, based on current operating procedures and interpreted data. Further development will involve the use of a sophisticated Expert System software shell.« less
  • Granulator coal injection has been practiced since 1982 at Scunthorpe Works, British Steel plc. The Works is world famous for its four Queens of Ironmaking, named Victoria, Anne, Bess and Mary. These four blast furnaces are capable of producing 4.1 million tonnes of hot metal per annum. The coal injection system was a joint development venture between British Steel and a local based company call Clyde Pneumatic Conveyors. After 14 years of operation and regulator use, Scunthorpe`s coal injection rates have risen to become among the highest in the world. Total coal injected stands at around 4 million tonnes andmore » coal injection rates of greater than 200 kg/thm have been achieved. The furnace operation has remained smooth throughout and there have been no measurable detrimental effects upon the blast furnace performance. In fact quite the opposite with several benefits. This paper briefly describes the furnaces and the coal injection equipment. Operating results for a full twelve months are given and discussed as are aspects of the blast furnace operating practice enabling these injection rates to be achieved. In financial terms savings totaling around 14 million pounds sterling per annum have been realized through the use of blast furnace coal injection.« less
  • An effort has been undertaken to increase the coal injection rate on Amanda blast furnace at AK Steel Corporation`s Ashland Works in Ashland, Kentucky to decrease fuel costs and reduce coke demand. Operating practices have been implemented to achieve a sustained coal injection rate of 140 kg/MT, increased from 100--110 kg/MT. In order to operate successfully at the 140 kg/MT injection rate; changes were implemented to the furnace charging practice, coal rate control methodology, orientation of the injection point, and the manner of distribution of coal to the multiple injection points. Additionally, changes were implemented in the coal processing facilitymore » to accommodate the higher demand of pulverized coal; grinding 29 tonnes per hour, increased from 25 tonnes per hour. Further increases in injection rate will require a supplemental supply of fuel.« less
  • The authors give background on the coal injection market for North America outlining the number of furnaces which are currently utilizing coal injection and those planning to implement facilities in the near term. The current highly developed state of coal injection technology emphasizes the reliable economic benefits which can be obtained from the leading technology and system vendors. Key elements for providing successful coal grinding and coal injection technology are: Safe, reliable preparation of coal at constant moisture content; consistent and controllable injection rates; minimum consumption of utility gases and electrical power; reliable long-term operation; minimum and scheduled maintenance; andmore » low labor requirements for maintenance. In today`s operating environment, unless a system fulfills the above requirements, it has very little chance of successful commercial application in the steel industry. Various PCI systems are commercially available. Within this arena, the Dense Phase system has been very successfully received and commands a 65 percent share of the world market.« less
  • The paper gives the background on the coal injection market for North America outlining the number of furnaces which are currently utilizing coal injection and those planning to implement facilities in the near term. The current highly developed state of coal injection technology emphasizes the reliable economic benefits which can be obtained from the leading technology and system vendors. Key elements for providing successful coal grinding and coal injection technology are: Safe, reliable preparation of coal at constant moisture content; consistent and controllable injection rates; minimum consumption of utility gases and electrical power; reliable long-term operation; minimum and scheduled maintenance;more » and low labor requirements for maintenance. In today`s operating environment, unless a system fulfills the above requirements, it has very little chance of successful commercial application in the steel industry. Various PCI systems are commercially available. Within this arena, the BMH/KST/Claudius Peters system has been very successfully received and commands a 65% share of the world market.« less