Application of online composition detection of matte powder in "double-flash" copper smelting based on bypass sampling and laser-induced breakdown spectroscopy
REN Peng1, XUE Huaqin2,3, SHI Ruibin1, PAN Congyuan2,3, ZHANG Bingchen1, JIA Junwei2,3
1. Tongling Nonferrous Metals Group,Tongling 244099,China; 2. Hefei Gstar Intelligent Control Technical Co., Ltd.,Hefei 230088,China; 3. Anhui Province Process Industry Online Detection and Intelligent System Key Laboratory,Hefei 230088,China
Abstract：The composition of matte powder is very important for process control and product quality in the "double-flash" copper smelting process.The methods such as inductively coupled plasma atomic emission spectrometry(ICP-AES) have the problems of insufficient real-time performance.In this study,the independently developed laser composition analysis system based on bypass sampling and laser-induced breakdown spectroscopy(LIBS) technology realized the online detection of matte powder in closed bins for the first time.The detection was conducted every two hours.The detection results could be output within 3-5 min,and the detected components included Cu,S,Fe and SiO2.The application conditions of the laser composition analysis system were optimized by studying the application parameters and the sampling points.That mean absolute deviations between online test values and laboratory test values for Cu,S,Fe and SiO2 were 0.507%,0.234%,0.188% and 0.035%,respectively,which could meet the comparison accuracy targets of 1.3%,1%,1% and 0.1%.During the four-month long-term operation in two testing points,the mean absolute deviations of Cu,S,Fe and SiO2 in sampling point A and B were 0.712%,0.273%,0.486%,0.029% and 0.711%,0.566%,0.457%,0.045%,respectively.The results indicated that the laser composition analysis system had good accuracy and stability,which could meet the real-time and reliability requirements for blister copper composition detection in production process.It was helpful for the intelligent improvement and optimization of process.
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