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

CIM Journal , Vol. 7, No. 4, 2016

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: jascott@laurentian.ca)

http://dx.doi.org/10.15834/cimj.2016.24
Abstract The otherwise waste heat in many water streams in the mining industry can be used to provide space heating of adjacent infrastructure including laboratories, workshops, and offices. This can be achieved by using 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 can be achieved.
Keywords: Heat pump, Heat recovery, Mineral processing, Pyrometallurgy, Smelting, Space heating, Waste heat
Résumé Dans l’industrie minière, la chaleur qui serait normalement perdue des circuits d’eau pourrait servir à chauffer des structures adjacentes incluant les laboratoires, les ateliers et les bureaux. Cela pourrait se faire en utilisant des systèmes de thermopompes, qui pourraient remplacer ou s’ajouter au chauffage existant. Dans l’exemple étudié, des circuits de refroidissement de procédé à une fonderie, l’analyse fournie illustre qu’il est possible de réduire les coûts annuels de chauffage de 19 % et d’obtenir une réduction simultanée de 62 % des émissions de CO2.
Mots-Clé Chaleur perdue, chauffage des locaux, fusion, pyrométallurgie, récupération de la chaleur, thermopompe, traitement des minéraux
Full Access to Journal
PDF version for $20.00
Other papers in CIM Journal, Vol. 7 , No. 4, 2016
Search
Sort By:  Relevance
Showing results 1 - 6
Text
Publication: CIM Journal
Issue: 4
Volume: 7
Year: 2016
Text
Summary: This paper presents regional radiometric gamma-ray spectrometry maps of Syria for total radioactivity (Ur) and surficial concentrations of equivalent uranium (eU). The maps were created by merging airborne and ground-based gamma-ray spectrometric survey datasets. On the regional radiometric eU map, eU anomalies are closely related to either phosphate and/or glauconite deposits. The Ur and eU maps delineate the boundaries of three phosphate deposits, close to the Palmyrides ridge, in the...
Publication: CIM Journal
Author(s): J. Asfahani, M. Aissa, and R. Al-Hent
Keywords: Airborne gamma-ray spectrometric survey, Equivalent uranium (eU), Ground-based gammaray spectrometric survey, Total radioactivity (Ur)
Issue: 4
Volume: 7
Year: 2016
Text
Summary: Concerns about using microdiamonds for resource estimation have been raised by workers because multiple diamond populations exist in many parts of the mantle source region, small diamonds in kimberlite could be exposed to proportionately greater levels of resorption and modification, and euhedral microdiamonds could crystallize immediately prior to kimberlite eruption. This paper addresses these concerns; discusses the geology of the mantle, the principal diamond host rocks, and the impact of...
Publication: CIM Journal
Author(s): J. Stiefenhofer and M. L. Thurston, D. M. Rose, I. L. Chinn, J. J. Ferreira
Keywords: Burr, Diamond, Distribution, Eclogite, Kimberlite, LogLaplace, Lognormal, Mantle, Morphology, Paragenesis, Pearson V, Peridotite, Populations, Resorption, Resource evaluation
Issue: 4
Volume: 7
Year: 2016
Text
Summary: Copper electrodeposition from synthetic and authentic acid mine drainage (AMD) is inhibited by ferric iron (Fe(III)), through re-oxidation of copper. Polarization to –2.5 V versus standard hydrogen electrode prevents the dissolution of predeposited copper from the cathode. Above pH 1, copper deposition is independent of Fe(III) concentration to approximately 25 g/L. Fe(III) is reduced to ferrous iron (Fe(II)), with a high combined current efficiency for iron and copper reduction. In a divided...
Publication: CIM Journal
Author(s): B. Vollick, A. F. Souza, C. Shamshoom, P. Maharaj, D. Bejan, and N. J. Bunce
Keywords: Cathodic deposition, Oxidation of copper by ferric iron, Remediation of acid mine drainage
Issue: 4
Volume: 7
Year: 2016
Text
Summary: Resin-anchored rebar is commonly used for rock support in mining. The rock properties and environment determine the average bond strength, allowing mine engineers to select the appropriate length and installation pattern for the support. In weak material such as potash, the average bond strength tends to be lower than for a typical hard-rock installation. Determining the failure mechanism by which the support fails in soft-rock applications could lead to improved bond strength and better...
Publication: CIM Journal
Author(s): D. Neely, D. Milne and L. R. Feldman, C. Smith
Keywords: Bond strength, Potash, Reinforcing bar (rebar), Support capacity
Issue: 4
Volume: 7
Year: 2016
Text
Summary: This paper compares Canadian provincial mining safety regulations addressing hoist safety, automatic hoisting, and shaft obstruction. The regulations are quite similar among provinces, with only slight differences. Risk-mitigation strategies used in other industries are discussed, including their applicability to mine hoists. The specific case of software safety is introduced through examples. The mitigation of software failure is based on the use of the software lifecycle as recommended by...
Publication: CIM Journal
Author(s): B. Galy and L. Giraud
Keywords: Hoist safety, Independent protective layer (IPL), Layer of protection analysis (LOPA), Life cycle, Probability of failure on demand (PFD), Regulation, Risk, Risk mitigation strategy, Safety instrumented system (SIS), Safety-integrated level (SIL), Safety related control function (SRCF), Software safety
Issue: 4
Volume: 7
Year: 2016
Powered by Coveo Enterprise Search