The Information System Of Zinc Hydrometallurgy On The Changeful And Complicated Zinc Concentrate

Zinc hydrometallurgy is a complicated and sophisticated process, which includes roasting of zinc concentrate, leaching, purifying, electrolysis and casting of zinc cathode. The zinc concentrate, the principle of fluidized bed furnace roasting, the factors influencing the general leaching and the economic and technological indexes in the zinc electrolysis process are indicated in this thesis, which lay a foundation for the information systems.The roasting, leaching and electrolysis of ZnSO4 are mainly studied in the thesis. The information system of mixing of Zinc concentrate is found first, which offers accurate mixing and costs the least and all the data needed can be input with database operating and ten kinds of ores areoptimized by the way of forty-five combinations. And then thermodynamic model is established in the process of fluidized roasting. So the components of roasting ores and gas can be determined through material balance and heat equilibrium. Because of the in fluctuation of the roasting time, this model can't describe the inner mechanism of the process and brings in certain deviations of calculation, but it can describe the roasting tendency. Finally, BP neural network is designed in the process of leaching and electrolysis to predict the leaching rate, the residue ratio and so forth and the factors such as electric current efficiency in the electrolyzing. Thirty groups of training data are used in the BP neural network and their range is wide. The training error goal can reach 10~5. So the prediction of the new designing BP neural network is reasoned with industrial process and its precision is high. It not only forecasts off-line but also provides the index of parameter for the direction of industrial process.This information system uses visual basic 6.0 and matlab 6.1 to programme and Microsoft Access to build and modify database. The visual basic 6.0 is simple and practical, is easy to realize visualization, is convenient to package and offer a lot of ActiveX widgets. The matlab 6.1 is not only convenient to operate the matrix and to draw a graph, but also has twelve toolboxes. The database of Microsoft Access may be revised and supplemented at any moment. Two information systems of fluidized bed furnace roasting through material balance and heat equilibrium and BP neural network of electrolysis of ZnSO4 are built by matlab 6.1 of neural network toolbox and the function of dealing with equation. Those processes are displayed by visualization in the system of visual basic 6.0. The involved function of BP neural network exist the function of script, which decrease the complexity of the program and improve the running efficiency of the program.