Material Type  

 학위논문

 

0016932587

Date and Time of Latest Transaction  

20240214100518

ISBN  

9798379826628

DDC  

621

Author  

Mather, Paul.

Title/Author  

An Exergetic Comparison of Copper Extraction from Chalcopyrite Concentrates by Pyrometallurgy and Hydrometallurgy - [electronic resource]

Publish Info  

[S.l.] : Purdue University., 2020

Publish Info  

Ann Arbor : ProQuest Dissertations & Theses, 2020

Material Info  

1 online resource(250 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

General Note  

Advisor: Krane, Matthew J. M.

학위논문주기  

Thesis (Ph.D.)--Purdue University, 2020.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Abstracts/Etc  

요약Copper is an essential metal in today's economy, due to its superior electrical and thermal conductivities, alloying properties, and chemical uses. Most copper is produced via mining and refining, and most copper is found in the earth's crust as chalcopyrite, CuFeS2. Typically, chalcopyrite is concentrated and fed to a high temperature pyrometallurgical process which produces 99.99% purity copper cathodes. Recently, Freeport-McMoRan Inc. has implemented a hydrometallurgical autoclave-leaching process that takes chalcopyrite concentrate and produces copper cathodes. It is imperative that these pyrometallurgical and hydrometallurgical processes be modeled and compared so that the extraction industry can best decide which technology to apply in the future. This work presents transient, reduced-order models for the comparison of the two processes using exergy balances. Exergy is typically thought of as the maximum work extractable from a system as it spontaneously reacts to the state of the surrounding environment; for extractive processes, it is also helpful to think of exergy as the minimum work required to effect a concentration, e.g. of copper. Exergy balances are thus similar to first law balances, but they comment on the location and magnitude of useful energy flows, instead of energy flows in general. For the baseline case, this work found that the pyrometallurgical process up to 99.5% copper anode stored 54% of the fed exergy in product, lost 20% of the fed exergy, and destroyed the remaining 26%. In contrast, the hydrometallurgical process up to 30 grams-per-liter copper pregnant-leach-solution stored 5% of the fed exergy in product, lost 9% of the fed exergy, and destroyed the remaining 86%. The effects of process variations are also looked at. It is recommended that this work be incorporated in whole-plant exergy balances to more precisely examine the tradeoffs between the pyrometallurgical and hydrometallurgical routes of copper extraction from chalcopyrite concentrates.

Subject Added Entry-Topical Term  

Heat transfer.

Subject Added Entry-Topical Term  

Furnaces.

Subject Added Entry-Topical Term  

Copper.

Subject Added Entry-Topical Term  

Particle size.

Subject Added Entry-Topical Term  

Cooling.

Subject Added Entry-Topical Term  

Bubbles.

Subject Added Entry-Topical Term  

Sulfur content.

Subject Added Entry-Topical Term  

Metallurgy.

Subject Added Entry-Topical Term  

Materials science.

Subject Added Entry-Topical Term  

Thermodynamics.

Added Entry-Corporate Name  

Purdue University.

Host Item Entry  

Dissertations Abstracts International. 85-01B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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소장사항  

202402 2024

Control Number  

joongbu:641155