Objectives/construction of C-4 reline at Bethlehem`s Burns Harbor Div.
- Bethlehem Steel Corp., Chesterton, IN (United States). Burns Harbor Div.
Hot metal for Bethlehem Steel`s Burns Harbor Div. is supplied by two blast furnaces. D furnace was blown in during 1969 and C furnace was blown in during 1972. These furnaces were designed to produce 5,000 NTHM/day. Due to improvements in raw material, equipment and operating practices, the two furnaces were each averaging 7,100 NTHM/day. The fourth reline of C furnace, was scheduled to start in Aug. 1994. There were four major objectives in planning for the reline: campaign length; coal injection; improved production; and lower maintenance costs. The reline was the most extensive undertaken to date by Bethlehem Steel. The original construction schedule was 95 days based on a 2-10-6 schedule. The actual schedule was 92 days working a 2-10-7 sequence most of the reline outage. The contractor took control of the furnace on Aug. 2, 1994 and the furnace was blown in Nov. 2, 1994. The critical path of the reline was the furnace proper followed closely by the casthouse and stockhouse areas. In conjunction with the reline, the No. 1 stove was rebuilt after 22 years of operation. This paper discusses the major work performed to accomplish the 92-day reline. Extensive pre-outage work was accomplished prior to blowdown. A successful blowdown, salamander tap and quench occurred. Reline activities are discussed. The furnace was returned to operation and within 10 days it was at 90% production.
- OSTI ID:
- 118850
- Report Number(s):
- CONF-9509197--
- Journal Information:
- Iron and Steel Engineer, Journal Name: Iron and Steel Engineer Journal Issue: 7 Vol. 72; ISSN IRSEA5; ISSN 0021-1559
- Country of Publication:
- United States
- Language:
- English
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