Investigation on Determination of Activities for Silicon, Manganese, Phosphorus, and Sulfur in Carbon Saturated Liquid Iron Using Chemical Sensors
The chemical sensors of silicon, manganese, phosphorus and sulfur have been investigated for carbon saturated liquid iron, which was used to simulate hot metal in blast furnace. The solid electrolytes of four kinds, SiO<,2> rich mullite (3Al <,2>O<,3>·2SiO<,2>), Mn-β-Al<,2>O<,3>, 4CaO·P<,2>O<,5> +CaO and CaS (1％ Y<,2>S<,3>)-ZrO<,2> were respectively synthesized and sintered by using solid-state reaction and sintering of two steps. Their conductivities were measured using A. C. impedance spectrum method, and the activation energies were subsequently calculated. Four kinds of reference-electrode materials were chosen and prepared for these sensors, respectively. The sensors were used to determine the activities of dissolved elements Si, Mn, P, S, in carbon saturated liquid iron between 1573 and 1723K with oxygen sensor as auxiliary one in measurements. The results of activity measurements were reasonable and in agree with theoretical rules. The sensors have the response time ranging between 15 and 20 seconds, and can keep 90 seconds long at their stable e. m. f, levels. There were no cracks and corrosion found in the sensors after the measurements.
chemical sensor solid electrolyte carbon saturated liquid iron activity elements of Si, Mn, P, S
WANG Chang-zhen TIAN Yan-wen GAO Jian-quan LU Wen-yue DUAN Hong-wei KANG Xue
College of Materials and Metallurgy, Northeast University, Shenyang 110004, China
国际会议
第十一届中日钢铁技术研讨会(11th China-Japan Symposium on Oron and Steel Technology)
武汉
英文
68-79
2007-10-29（万方平台首次上网日期，不代表论文的发表时间）