Kulenova Natalya, Onalbayeva Zhanar, Akhmetvaliyeva Zarina, Shumskij Viktor
METSIM model has been built and model analysis of Waelz process of typical charge has been calculated. The charge is from zinc cakes and rich granulated slag of lead melting with the use of coke fines as fuel-reductive material. The size of model furnace, technological parameters and indexes of model process are adopted to known industrial data.The model enables to estimate influence of charging, raw material composition, and operating conditions (blast consumption, consumption of oil-fuel, change in composition and consumption of fuel-reductive mix of carbon materials, amount of heat loss) on burden and heat balance of the process.Movement of counter flows was calculated by sections with provision for chemical interactions, phases of mass- and heat-exchange inside the furnace. It enabled to get model profiles of components temperatures and concentrations of solid and gas phases along of furnace.In this model heat balance is calculated and amount of gas is estimated (that is produced in boiler when the heat from furnace gases is utilized). METSIM model also enables to study the influence of linear deformation of gas phase oxidizing potential and of flare flame spread on final technological parameters of materials roasting in rotary tube furnaces. It can be used for optimization of the process.
METSIM; modeling; zinc cakes; tube furnaces;heat balance