Simulation Of Tungsten Metallurgical Process Based On METSIM

Tungsten is a very important strategic mineral resource in China,which is widely used in metallurgy,chemical industry,electronics,aerospace,military and other industrial fields.China has a large number of tungsten resources,but also a large consumption of tungsten products.With the development of economy and science and technology,the demand for tungsten products is increasing year by year,meanwhile,people have also put forward higher and higher demand of the quality of tungsten products.On the other hand,with the consuming and decreasing of high-grade tungsten resources.The tungsten resources which tungsten metallurgy enterprise smelting is grade changes and its impurity is so much.Before each batch of ore enters the smelting system,it is required to carry on the analysis of the ore phase and carry out a large number of process experiments and research to determine the best technological process and its technological parameters.This process wastes both time and cost.Therefore,process theory scholars and tungsten smelting enterprises has been on carrying out the reduction method and the way of technological experiments,with lower cost,more quickly determine best fit mineral grade of raw materials and the change of composition of smelting process and process parameters.The computer simulation technology is an effective method in the process of metallurgical process.In this thesis,taking tungsten smelting process as the object,using computer simulation technology,to carry out the process of tungsten smelting process simulation and optimization of the key process parameters.Construction of the best technological scheme and method for the low cost and high efficiency of tungsten smelting enterprises to meet the change of ore source.The simulation system of tungsten smelting process and its parameter control is designed by using the metallurgical simulation system METSIM.The main research work and conclusions of this thesis are as follows.?1?In this thesis,the principle of ball milling and ion exchange as well as the APT crystallization process and its main technological parameters in the process of tungsten ion exchange were analyzed.On the basis of the METSIM simulation system,the process simulation system of ball milling and ion exchange and APT crystallization process which was based on METSIM was established in turn.The simulation system of tungsten ion exchange smelting process was established,and the material balance and simulation analysis of each process were carried out.The comparative analysis shows that the simulation system of tungsten smelting process can better reflect the actual production process.?2?By using the ball milling process simulation system,the system can calculate the realtime leaching rate of WO₃ in the alkali pressure cooking process,as well as the alkali / W ratio during the reaction process.Compared with the experimental study on physical process under the same conditions,the two parameters obtained are similar,the change trend is consistent.?3?Using the established tungsten ion exchange smelting process simulation system can not only to carry out simulation test of tungsten smelting process to determine the optimal technological process,and it can also control the process parameters,equipment and other process parameters and algorithm analysis and optimization by using simulation of process control and simulation of process flow.The detection and control of the saturation point of the ion exchange process is the object of this thesis.the prediction model of saturation point of ion exchange adsorption is established based on BP neural network and the simulation analysis is carried out in the simulation system.The maximum percentage error between the predicted value and the true value of the adsorption saturation point is 0.5%.The maximum liquid concentration error between the predicted value and the true value is 0.5%.The above error range is within the scope of the project.The process simulation and optimization system of tungsten ion exchange process is studied in this thesis provides a feasible means to research and design of tungsten smelting process and analysis of control system.