Evaluating the Chemical Diffusion Coefficient of Sulfur in slag by metal analysis: Model Concept and Experiments
A novel technique was developed to evaluate the Chemical Diffusion Coefficient of sulfur using the fact that the diffusivity of sulfur in the slag is at least two orders of magnitude less than that in the metal. The methodology uses specially designed experimental setup supported by a model to evaluate the diffusion coefficient. A ternary slag of composition 51.5 ％ CaO-9.6 ％ SiO2-38.9 ％ Al2O3 slag was chosen for the experiment. Experiments were conducted using a custom-made Armco Iron crucible. The crucible was specially designed to enable metal sampling without disturbing the slag-metal interface. CaS was used as the sulfur source. It was also ensured that the PS2 and PO2 pressures calculated from the equilibrium Gibbs energy of the reaction between CaO in the slag and solid CaS, was well within the limits to prevent any dissolution into the crucible material. Experiments were conducted at 1680 K, 1700 K, and 1723 K. The diffusion coefficient was back calculated such that a good fit is obtained between the experimental and model results. The diffusion coefficient was in the range of 3.98 - 4.14 x 10-6 cm2/s for the temperature range 1680 - 1723 K, which is in good agreement with the results available in the literature.
Diffusion Coefficient Sulfur Slag
Luckman Muhmood Nurni N Viswanathan Seshadri Seetharaman
CSIRO, Process Science and Engineering, Australia Lule(a) Technical University, Sweden Royal Institute of Technology, Sweden
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-11
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）