Development and application of sealing process operation model in blast furnace
The sealing of blast furnace is a complicated and special operation in ironmaking.In order to fully quantify the complex relationship between many factors affecting its control and form the standardization and process of sealing operation.Based on ironmaking theory,combined with practical experience and supplemented by computer information means,a process operation model of BF fur-nace sealing was innovatively designed and developed that can quantify modularize and accurately control the charge batching,discharge and comprehensive smelting parameter control and check in the process of furnace sealing,and have the functions of data collection,quantitative evaluation and optimization.It not only improves the accuracy of the calculation of batching and discharging of the blast furnace,the empty volume in the upper part of the furnace and the position of the sealing charge,and the control of the sealing parameters,but also the calculation methods of the important operation nodes such as the last iron drawing,stopping the feeding,closing the furnace and stopping the coal and oxygen are given.The practice applied to the blast furnace with specific volume and raw fuel condition shows that,in the process of furnace sealing,the deviation rate between the planned va-cated volume and the calculated value according to the theoretical material speed is-0.184％.The deviation rate between the planned filled volume and the actual value of the sealed charge is-0.72％,and the deviation value between the planned filling line and the actual value is 0.15 m.The difference between the coke ratio calculated according to theoretical rate of drop of blast furnace charge and the coke ratio calculated by the plan to vacate volume batching is 0.81％.The parame-ters of hot metal in the first furnace are all within the defined range of the calculation of charging and discharging of sealed charge.The smelting parameters of blast furnace returned to normal after 6 nat-ural shifts.The model lays a foundation for improving precision of sealing process,shortening the smelting process and reducing the cost.
blast furnacesealing the furnacecontrol of blast furnace chargethe time of the last ironmodularity
万方数据
维普
