Automatic Control For Ion Exchange In Tungsten Metallurgy

This thesis introduces the application of Yokoyawa DCS system for ion exchange tungsten metallurgy,which has filled in the blank of this field.Simultaneously,some defects have been improving during the application.According to the requirements of process and constructive expansion,this system has been developed and optimized continuously with the successful application.The thesis mainly discusses the achievement of the process of tungsten metallurgy by ion exchange method,and the automatic control system.It also introduces the basic process and control demands for tungsten metallurgy by ion exchange method,the characteristics and difference of PLC,DCS and FCS.The development trend of the systems is researched.Finally,it introduces the basic structures and function characteristics of YokoyawaμXL system and CS 1000 total distributed control system.The thesis mainly introduces the design & systemic configuration of ion exchange tungsten metallurgy automatic control system,and the second development process and achievement mode during the innovation and improvement for control process.The thesis mainly explains the hardware structure,systemic configuration and points for attention for resource distribution and configuration,and introduces man-machine interfacial design for monitoring graph and trend record,which well reflects the man-machine interfacial functions of CS1000 system and is convenient for workers to operate and monitor;it also introduces the design and configuration of function modules,and mainly introduces the achievement of automatic recycling control process for dosing and ion exchange,the achievement method for automatic absorption quantity design in the process of ion exchange,which automatic control is made under the new process condition.The thesis mainly introduces the achievement of connective control between PLC and DCS system,which is also the achievement method and design concept for the connective control between ion exchange process and raw material process automatic control;thus,the automatic control to different processes is achieved.The thesis also introduces the changes of testing items and the development of testing technology,which use new testing methods to achieve automatic control,such as the application of conductance rate instrument and radar liquid level gauge. The thesis also mainly introduces the machine vision system,through the introduction to the system,its principle,characteristics,structure,test and type selection, the thesis extends to the inspection application for tungsten metallurgy process,prove the correctness of this inspection thought by experiments and thus solve the inspection problem about super low concentration tungsten.