Dry Coke Quenching Study. Final Report, September 1978

摘要

The financial evaluation of capital and operating cost estimates for a dry coke quenching facility installation indicates a marginal return on investment if the evaluation is based exclusively on steam credits. However, the potential improvements in environmental emissions and reported, but unverified, blast furnace operations may justify the expenditure. The Russian and Japanese claim of 2 to 4% reduction in blast furnace coke usage with up to 4% increase in iron production has not been demonstrated in the domestic steel industry and, therefore, is not included in the financial analysis. A 2% coke reduction represents a savings of approximately $0.81 per ton of hot metal produced or an additional annual credit of $1,800,000 for dry coke quenching, exclusive of productivity gains. Additional credit of this magnitude would increase the estimated discounted cash flow return from 10% to approximately 16% for the estimated capital expenditure of $21,742,652. The projected world escalation in fuel cost, National conservation goals, possible energy supply shortages, and environmental considerations in conjunction with the need for a full scale, controlled test of dry quenched coke in a dedicated blast furnace are decisive factors in considering the merits of this proposal. National Steel Corporation is prepared to cooperate in the development and implementation of this program. (ERA citation 04:049431)