The Reaction of Chalcopyrite Concentrate Particles in a Flash Furnace Shaft.
Ph d Thesis Univ Utah, 1986 :177 pages
The aim of the study was to describe the overall flash-smelting process by combining mathematical expressions for the chemical changes occurring in the oxidation of chalcopyrite particles with models for turbulent fluid flow and heat and mass transport. A laboratory-scale flash-smelting reactor was built and used to test the comprehensive model. The oxidation of chalcopyrite particles under flash smelting conditions was analyzed by combining the kinetics of single-particle oxidation with equations describing heat and mass transfer between the particle and its surroundings. The effects of oxygen concentration, particle size, gas and wall temperatures, and reaction time have been elucidated. A mathematical model has been developed to describe the behavior of minor elements during flash smelting of copper concentrate. The influence of oxygen enrichment, matte grade, and wall temperature, as well as the bath temperature, on minor-element behavior has been elucidated. Copper concentrates have been flash-smelted in the laboratory reactor. Samples of gas and partially reacted particles have been collected at various positions within the reactor, using as variables the bulk-gas temperature and the composition and sulfur content of the particles. The effects of solids-loading ratio in the inlet stream and oxygen concentration of the bulk gas on the above-mentioned variables have been determined.
IH; Final Contract Report;
Ph.d. Thesis, Univ. Utah, 1986, 177 PP.
Univ. of Utah