Research On The Method Of Controlling For AOD Furnance Slag Splashing

Argon oxygen refining technology (AOD method) is blown oxygen in the smelting process while blowing argon gas (nitrogen), with oxygen instead of electricity, in line with the national energy saving production requirements, has become common smelting technology in steel refining industry. But AOD furnace is significantly lower than the ordinary smelting furnace. Solve the problem of low furnace has become improve AOD furnace production capacity of key technologies.Slag splashing process is the use of the residue after the smelting furnace slag as the main raw materials combined with slagging agent, Sprayed onto the lining form dense slag splashing layer, protects against high temperature oxidation resistance of slag erosion. Thereby extending the role of the furnace. Many factors affect slag splashing. In this paper, it is subject to Nitrogen flow and control of the gun breech, we have done the following research:Combined with AOD furnace smelting process and structure analysis slag splashing technology, Including nitrogen flow, lance slag splashing, Slag bath stay, slag viscosity and slag splashing time, Slag splashing frequency, Which focuses on research done slag composition analysis and orientation of slag splashing.Selecting the valve opening for nitrogen system as the object and studying control characteristics of the controlled object based on technological requirements and nitrogen control principle the of nitrogen gas supply system. Analyzing control principle of control algorithm of PID control, fuzzy control and Fuzzy adaptive PID control, doing research on the Advantages and disadvantages of PID control and Fuzzy adaptive PID control based on Nitrogen flow system. The paper decided to use Fuzzy adaptive PID algorithm to realize nitrogen flow control, verifying the superiority of the fuzzy adaptive PID algorithm by simulation experiment, and verifying the rationality of algorithm selection by using the data obtained from the monitoring system of the host computer.The paper doing research on the control system of the gun position of the slag splashing in AOD furnace based on erosion distribution, nitrogen flow, quantity of remaining slag and slag property received by Laser thickness measuring instrument. Firstly, designing the expert system of gun control, analyzing the structure of knowledge base and reasoning machine working principle, man-machine interface system structure and system function etc. Secondly, carrying out system simulation experiment by framework model of Simulink. Finally, achieving the design of DCS control system of AOD furnace slag splashing by using WINCC configuration software combined with SIEMENS S7-400PLC。...