Gary No. 13 blast furnace achieves 400 lbs/THM coal injection in 9 months
Conference
·
OSTI ID:129063
- U.S. Steel Group, Gary, IN (United States)
Number 13 Blast Furnace at Gary began injecting Pulverized Coal in March 1993. The injection level was increased over the next nine months until a level off 409 lbs/THM was achieved for the month of December 1993. Several major areas were critical in achieving this high level of Pulverized coal injection (PCI) including furnace conditions, lance position, tuyere blockage, operating philosophy, and outages. The paper discusses the modifications made to achieve this level of injection. This injection level decreased charged dry coke rate from 750 lbs/THM to about 625 lbs/THM, while eliminating 150 lbs/THM of oil and 20 lbs/THM of natural gas. Assuming a 1.3 replacement ratio for an oil/natural gas mixture, overall coke replacement for the coal is about 0.87 lbs coke/lbs coal. Gary Works anticipates levels of 500 lbs/THM are conceivable.
- OSTI ID:
- 129063
- Report Number(s):
- CONF-9504182--; ISBN 0-932897-99-1
- Country of Publication:
- United States
- Language:
- English
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