A new distance correction method for sulfur analysis in coal using online XRF measurement system  

作　　者：JIA WenBao ZHANG Yan GU ChenGuang HEI DaQian LING YongShen SHAN Qing 

机构地区：[1]College of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics

出　　处：《Science China(Technological Sciences)》2014年第1期39-43,共5页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11375087);Provincial Training Programs of Innovation and Entrepreneurship for Undergraduates(Grant No.201310287102)

摘　　要：When X-ray fluorescence （XRF） technology is used to measure the sulfur concentration in coal online, the measurement accu- racy is affected by the coal＇s uneven surface and the particle size. In order to improve the accuracy of sulfur concentration measurement, an online measurement system, consisting of a portable X-ray fluorescence instrument and an auxiliary distance correction module, was developed in this paper. By measuring the standard coal samples of known sulfur concentration, we obtained a calibration curve that can be used to analyze the sulfur concentration. We studied the relationship between the X-ray fluorescence intensity （I） and the distance （D） from surfaces to instrument. The results showed that there was a good linear re- lationship between 1 and D when the sulfur content was certain. Based on these knowledge, the distance correction formula of X-ray fluorescence intensity was proposed. By applying the distance correction formula to experimental sulfur concentration measurement, we demonstrated that the measurement accuracy can be significantly increased.

关 键 词：XRF sulfur concentration distance correction COAL 

分 类 号：P575[天文地球—矿物学]