Recovery of low-grade waste heat from smelter process water streams using heat pumps


I. M. Ross
Bharit School of Engineering, Laurentian University
Sudbury, Canada

G. M. Ross
Northern Ontario School of Medicine, Laurentian University
Sudbury, Canada

*J. A. Scott
Bharti School of Engineering & Northern Ontario School of Medicine
Laurentian University, Sudbury, Canada
(*Corresponding author:
Abstract The otherwise waste heat in many water streams in the mining industry, can be tapped into to provide space heating of adjacent infrastructure including laboratories, workshops and offices. This can be achieved by utilizing heat pump systems which can work as a replacement or in conjunction with existing space heating. In the example investigated, process cooling streams at an ore smelter, the analysis provided illustrates that annual heating costs can be 19% lower and a simultaneous 62% reduction in CO2 emissions achieved.
Keywords: Heat pump, Heat recovery, Mineral processing, Pyrometallurgy, Smelting, Space heating, Waste heat
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