| A research was conducted on pollution characteristic and migration and transformation ofpollutants in the scrap copper smelting process in order to solve the problems such as seriouspollution, unclear pollution characteristic and lack of data support for the control of pollutants.Total material requirement and output and substance flow analysis were used to study the materialflow analysis. It was found that copper was mainly lost in NGL refining process, and pollutantsproduced in converter blowing, NGL refining and rocking furnace refining process. The pollutioncharacteristic analysis showed that there were high contents of Cu, Pb, Zn, Cd and As in smeltingdust, and Cd, As were of high environment activity in the dust. The refining slag could be recycledto the smelting process because of high copper content. A higher temperature promoted theelements such as Cu, Pb, Zn and Ni transferred to gas. Reducing atmosphere significantlyinhibited the Cu and Pb transforming to the gas phase, and the increase of oxygen content wouldimprove the volatilization rates of the two kinds of metal. The volatilization rate of Zn inoxidizing atmosphere was significantly lower than the other two running atmosphere. The AspenPlus was used to simulated a typical scrap copper smelting process and the influences of operatingparameters such as slagging agent dosing quantity, the the amount of oxygen and raw material onthe composition of the export flue gas of melting furnace were investigated. |
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