CURRENT SITUATION ANALYSIS AND PROSPECT OF SCRAP INSPECTION
Under the background of double carbon,the comprehensive utilization of scrap steel is particularly important.The quality and cost of scrap steel directly affect the production efficiency and technical and economic benefits of enterprises,so the national standard"GB/T 39733-2020 recycled steel raw materials"puts forward higher requirements for the quality inspection of scrap steel.In this paper,the status quo of scrap inspection is analyzed from the aspects of radioactive pollutants,explosive materials,hazardous waste,inclusions,chemical composition,corrosion and coating,and the development of scrap inspection is prospected.It is pointed out that it is necessary to use the tunnel type radioactive detection device for the initial inspection of incoming scrap steel.The identification standards and technical specifications of hazardous wastes need to be improved,and the operability of the identification procedures is not strong;the composition of scrap steel can be measured quickly by laser induced breakdown spectroscopy,and the correlation determination coefficient and root mean square error are satisfactory.The recognition algorithm of scrap rust layer based on color feature and texture feature can accurately identify scrap rust layer of training set and prediction set.Strengthening the construction of scrap inspection standard system,increasing the research and development of fine classification of scrap according to chemical composition,especially the online,rapid,accurate and quantitative analysis of scrap composition based on laser-induced breakdown spectroscopy technology is its future development direction.
万方数据
维普
