Integration of the solar thermal energy for the blast preheating in the copper smelting process
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Title
Integration of the solar thermal energy for the blast preheating in the copper smelting processAuthor (s)
Tutor/Supervisor; University.Department
Sánchez-Vilches, Enrique; Universitat Jaume I. Departament d'Enginyeria QuímicaDate
2019-10Publisher
Universitat Jaume IAbstract
This work treats the subject of integrating a Central Tower System (SCT) as a source of
thermal energy in the preheating of the blast of an Outokumpu Flash Furnace. The economic
profitability of the process, as well ... [+]
This work treats the subject of integrating a Central Tower System (SCT) as a source of
thermal energy in the preheating of the blast of an Outokumpu Flash Furnace. The economic
profitability of the process, as well as the environmental impact, are evaluated in addition to
the analysis of the smelting process and the consequences of preheating the blast using solar
thermal energy.
The simulations developed in this work show clearly how removing the oil as an input of the
process greatly reduce the volume of gases inside de furnace, allowing a higher feed rate and
hence increasing the production and the profitability. As a contra, the removal of the fossil
fuel implicates further enriching the blast in oxygen and/or preheating the blast.
As the industrial oxygen is a source of economic losses for the process, and regarding the
environmental impact of producing industrial oxygen, the preheating of the blast up to 600
K allows a reduction of the 17.43 mass-% of industrial oxygen. This would mean saving up
to $2,443,878 per year in oil and industrial oxygen if we suppose that the copper production
is kept constant at 75 ton per hour independently of the temperature of the preheating.
On the other side, it has been noticed that preheating the blast expands greatly the volume
of the gases inside the furnace, consequently reducing the production of copper and sulfuric
acid, the two sources of economic incomes. If the down in the production is considered in
the economic analysis, the results show that the inversion in a SCT system wouldn’t be
economically profitable.
Regarding the performance of the SCT system, it’s perfectly suitable for the preheating of
the blast up to 1200 K. Without storage system, it would be possible to reach the energetic
needs for the preheating 7 hours per day in average, providing around 4 MW in the case of
preheating up to 600 K. [-]
Subject
Description
Treball Final de Grau en Enginyeria Química. Codi: EQ1044. Curs acadèmic: 2018/2019
Type
info:eu-repo/semantics/bachelorThesisRights
info:eu-repo/semantics/openAccess
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