1. State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization, Kunming 650093, China
2. Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming 650093, China
3. National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China
Abstract：Sulfur dioxide is the main air pollutant. It is directly related to the formation of haze. Flue is gas desulfurization. The primary measure of protecting the environment and reducing haze. Phosphate ore pulp flue gas desulfurization is a new desulfurization method in which desulfurization agent is phosphate ore pulp. The concentration of sulfur in solid and solution (phosphate rock, desulfurization liquid of phosphate rock and desulfurization slag) of phosphate ore pulp flue gas desulfurization agent were determined with Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). By choosing a more sensitive analytical line of sulfur, the effects of operating conditions of the ICP spectrometer on the analysis results were investigated, at the same time, the sample preparation methods and coexisting ions which impact on determination results of sulfur was also considered. Phosphate rock, desulfurization liquid of phosphate rock and desulfurization slag were treated in three different ways to make sure the sample dissolved completely. 181.973 nm spectral line was chose as analytical line to avoid spectral interference of coexisting element. The incident power of 1 300 W, with observation height of 12 mm, the nebulizer gas flow of 0.65 L·min-1 and the pump flow rate of 1.5 mL·min-1 were selected. Under the optimum analytical conditions of spectrometer, the method was used for the determination of sulfur in phosphate rock, desulfurization liquid of phosphate rock and desulfurization slag with the detection limit of 0.000 38%, recoveries between 89.5% and 104.5%, and relative standard deviation (RSD≤2.30%). By comparing the results of barium sulfate gravimetric method, the findings were basically consistent with the relative deviation ≤3.88%. In conclusion, the method is simple and efficient, with high precision and accuracy, which can be used for research and routine production in phosphate ore pulp flue gas desulfurization.
Key words：ICP-AES; Sulfur; Phosphate ore pulp; Flue gas
[1] Pui David Y H, Chen S C, Zuo Zhili. Particuology, 2014, 13: 1.
[2] WU Chun-jin, LÜ Wu-hua, MEI Yi, et al(武春锦，吕武华，梅 毅, 等). Chemical Industry and Engineering Progress(化工进展), 2015, 34(12): 4368.
[3] Maina P，Mbarawa M. Fuel, 2012, 102: 162.
[4] Altun N Emre. Fuel Processing Technology, 2014, 128: 461.
[5] GB/T 1880—1995, Phosphate Rock and Concentrate-Determination of Sulfur Trioxide Content-Gravimetric Method(磷矿石和磷精矿中三氧化硫的测定-重量法). National Standards of the People’s Republic of China(中华人民共和国国家标准).
[6] ZHENG Guo-jing, JI Zi-hua, YU Xing(郑国经, 计子华, 余 兴). Application of Atomic Emission Spectrometry Analysis(原子发射光谱分析技术及应用). Beijing: Chemical Industry Press(北京: 化学工业出版社), 2010. 1.
[7] GAO Guang-jie-zi, LI Yan-ping, FENG Sheng-ya, et al(高光洁子, 李艳萍, 冯圣雅, 等). Chinese Journal of Analytical Chemistry(分析化学), 2014, 42(3): 457.
[8] Iva Juranovic Cindric, Ivona Krizman, Michaela Zeiner, et al. Food Chemistry, 2012, 135(4): 2675.
[9] WANG Li-ping, FENG Hai-tao, DONG Ya-ping, et al(王立平, 冯海涛, 董亚萍, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2015, 35(2): 523.
[10] Cheng Yonga. Procedia Engineering, 2011, 24: 447.
[11] Mohamad-Hadi Karbasi, Babak Jahanparast, Mojtaba Shamsipur, et al. Journal of Hazardous Materials, 2009, 170(1): 151.
[12] NING Ping, MA Lin-zhuan, YANG Yue-hong, et al(宁 平, 马林转, 杨月红, 等). Method for the Catalytic Oxidization of Low Desulfurization by Phosphate Pulp(磷矿浆催化氧化脱除低浓度二氧化硫的方法). China Patent(中国专利), 200610011003.0, 2015.
