Behaviour of copper matte particles in suspension oxidation

摘要

Recently commissioned Kennecott-Outokumpu flash converting was developed to replace the approved but environmentally outdated Peirce-Smith -converting to satisfy the globally tightening emisison regulations. In the present study, dust formation and reaction mechanisms of two copper mattes with different experimental parameters were studied in lean suspension conditions. Both mattes had very high copper content of approximately 75 wtpercent and low iron content of 4.5 wtpercent and 1.2 wtpercent Fe. A laboratory scale, vertical laminar-flow furnace with a low feeding rate was used to simulate the phenomena taking place in the reaction shaft of a flash converter. experimental conditions included temperature of 1300 deg C with reaction gas oxygen content of 20 volpercent, 50 volpercent, and 75 volpercent.