Effect of temperature on the leaching of copper oxide ore in phosphoric acid solution and kinetics.doc


Effect of temperature on the leaching of copper oxide ore in
phosphoric acid solution and ics#
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WU Dandan1, LIU Shaowen2, WEN Shuming1, DENG Jiushuai1, JI Cuicui1**
(1. Faculty of Land Resource Engineering, Kunming University of Science and Technology,
Kunming 650093;
2. Kunming Jinyinruntong Metallurgical co., Ltd, Kunming, 654100)
Abstract: In this study, copper extraction from copper oxide ore using phosphoric acid solution as
leaching agent was investigated, wherein the effects of the main factor temperature on the leaching of
the copper oxide ore was researched, together with the leaching ics. It was experimentally
demonstrated that the copper leaching rate increased with the increasing reaction temperature.
Moreover, the leaching process can be described by the shrinking core model for surface chemical
reaction. The activation energy of the leaching process was determined to be ..
Key words: Copper oxide ore;phosphoric acid; temperature; ics
0 Introduction
Copper, one of the most popular and the most valuable metals applied in human life and
industry, generally appears in the forms of sulfides and oxides in nature, such as chalcopyrite,
bornite, chalcocite, malachite and chrysocolla, etc.[1,2], wherein the copper sulfide ore has better
floatability, which can be separated from the gangue and recovered by flotat