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In order to study the kinetics of copper leaching from pyrite cinder containing 0. 87%Cu sulfuric acid slag alter being roasted at high temperature, the properties of ore were analyzed by X-ray diffraction and other methods. The effects of ore particle size，initial acidity，liquid-so lid ratio，stirring rate，leaching temperature and leaching time on copper leaching in sulfuric acid slag samples were studied experimentally. The unreacted shrinking nucleus model is used to analyze the kinetics of the sulfuric acid slag leaching process. The results show that all factors have a great influence on the leaching rate of copper leaching of sulfuric acid slag; based on the leaching process controf model，leaching kinetic equation，leaching reaction appearance in terms of activation energy，the main controf step of determining the slag leaching process is internal diffusion reaction controfs, and the apparent activation energy of the leaching reaction is E, --19. 96 kJ/mof. [ABSTRACT FROM AUTHOR]