Application Analysis of Waste Heat Cooling Using Slag Water in Linyi Gangtou Special Steel Blast Furnace
Abstract：This paper analyzes the problems of waste heat in slag water, key equipment selection, and the actual operation effect of slag water cooling. By using a specially designed heat exchanger to produce hot water from slag water or to generate low-pressure steam through vacuum phase change, the corrosion and scaling problems of slag water can be effectively solved. A low-temperature driven absorption chiller is used to address the temperature fluctuation issue of slag water. The results show that by combining a heat exchanger with a two-stage hot water absorption chiller, stable cooling of slag water between 60-95°C can be achieved. The average cooling capacity of this waste heat cooling system is 3,349 kW, with a coefficient of performance (COP) of 0.486. During the cooling period, it can save 1.494 million kWh of electricity, and the equipment investment payback period is 3-5 years.
Keywords：Slag waterWaste heatHeat exchangerAbsorption chiller
Publication Date：2025-12-25
Online Publishing Date：2026-01-26(First online date of this platform, not the publication date of the document)
Pages：3( 77-79 )