SOME SCIENCE PROBLEMS ABOUT STEEL MANUFACTURING PROCESS

Many science issues of different level and different space-time scale have been met in the course of cognizing the dynamic operation of steel manufacturing process.The issues consist of fundamental science matters of microcosmic level(atom or molecule scale),technological science matters of mesoscopic level(field or equipment scale)and engineering matters of macroscopical level (manufacturing processing scale).In the production process of steel plant,the issues of these three levels are in terrelated and coupling-integrated and should be paid more attention in new century. The physical essence in the dynamic operation of steel manufacturing process is that multi-factor mass flow operate in a specific flow network(the frame of process system,e.g.,the general layout of steel plant)followed a definite program.It is a sort of open and irreversible process that is a conversion and dissipative process of material and energy. The study on the flow action brings on thinking over the function extension of steel manufacturing process which is the function of steel product manufacture,the function of energy conversion and the function of wastes recycling. Further study on the structure,function and efficiency of steel manufacturing process would be deeper for summarizing,abstracting and describing the connotation from the engineering science level systematically and accurately.It is significant for the engineering logic,the guiding ideology of enter- prise technical revamping and the philosophy of steel plant reforming and that of new steel plants.