GOALI/IUCRP: Solid State Amperiometric Sensor for In-Situ Monitoring of Melt Composition in High Temperature Metallurgical Processes

9424069 Pal将设计和制造一种固态传感器，用于现场监测在冶炼和精炼黑色金属和有色金属时遇到的氧化物(渣)熔体成分。在该装置中，氧离子传导稳定的氧化锆固体电解质将暴露在熔体中的阴极室与暴露在参考气体中的阳极室物理地分开。电极材料的可能选择包括难熔氧化物，如La和Y铬酸盐，掺杂的氧化锆和各种惰性金属氧化锆金属陶瓷。负电位扫描将应用于传感电极(阴极)相对于对电极(阳极)。当熔体中氧化物的离解电位达到时，氧化物将在阴极还原，氧离子将通过固体电解质被驱动到阳极，在那里它们将释放电子，并检测到流过器件的离子电流。如果要检测的熔体中的氧化物具有不重叠的解离电势，并且低于氧化锆的解离电势，则该装置可以顺序解离和区分这些氧化物。一旦氧化物被解离，电势扫描将产生离子电流峰值，这将给出其浓度的测量。用一台仪器就可以检测和测量黑色金属冶炼和精炼渣中铁、锰、铬的氧化物浓度。该传感器将在CaO-SiO_2-Al_2O_3-FeO、CaO-SiO_2-Al_2O_3-FeO-MnO和CaO-SiO_2-Al_2O_3-FeO-MnO-CROX三个明确的渣系上进行测试。工业合作伙伴将把这种炉渣传感器打包，以便在炼钢设施进行现场测试。合理实时检测炼钢和钢包精炼渣中的FeO、MnO以及不锈钢冶炼渣中的CrOX，是通过更好的工艺控制，提高铁和合金元素的回收率，减少非金属夹杂物的关键。为了优化黑色金属和有色金属冶炼和精炼的过程控制，需要在过程的各个阶段对炉渣中的一些关键成分的浓度进行实时监测。目前，这些过程中的所有炉渣成分分析都是使用昂贵的分析设备从熔体中取出样品进行的，而且需要相对较长的时间。如果能够使用相对便宜的传感器进行炉渣成分的现场监测，它将被广泛用于冶炼和精炼过程控制，从而改善产品质量，提高生产率，从而降低整体制造成本。

9424069 Pal A solid state sensor will be designed and built to in-situ monitor oxide (slag) melt composition encountered in smelting and refining of ferrous and non-ferrous metals. In this device, the oxygen ion conducting stabilized zirconia solid electrolyte will physically separate the cathodic compartment, exposed to the melt, from the anodic compartment, exposed to a reference gas. Possible choices for electrode materials include refractory oxides such as the lanthanum and yttrium chromites, doped zirconia and various inert metal-zirconia cermets. A negative potential sweep, will be applied to sensing electrode (cathode) with respect to the counter electrode (anode). When the dissociation potential of an oxide in the melt is reached, the oxide will reduce at the cathode and the oxygen ions will be driven through the solid electrolyte to the anode, where they will liberate electrons and an ionic current through the device will be detected. If the oxides in the melt, which are to be detected, have dissociation potentials that do not overlap and are lower than that of zirconia, then these oxides can be sequentially dissociated and distinguished by this device. Once an oxide is dissociated, the potential sweep will result in an ionic current peak which will give a measure of its concentration. By using a single device one could detect and measure the concentrations of the oxides of iron, manganese and chromium in ferrous smelting and refining slags. The sensor will be tested on three well defined slag systems, CaO-SiO2-Al2O3-Feo, CaO-SiO2-Al2O3-FeO-MnO, and CaO-SiO2-A12O3-FeO-MnO-CrOx. The industrial partner will package this slag sensor for on-site testing in steelmaking facilities. Proper real time detection of FeO and MnO in steelmaking and ladle refining slags and also CrOx in stainless steelmaking slags is key to improving the recovery of iron and alloying elements and decreasing non-metallic inclusions through better process control. For optimum process control of ferrous and non-ferrous smelting and refining operations, concentration of some critical components in slags need to be monitored in real time at various stages during the process. Currently, all slag composition analyses in these processes are performed with expensive analytical equipment on samples removed from the melt and they take a relatively long time. If in-situ monitoring of slag composition can be performed using a relatively inexpensive sensor it would be widely used for smelting and refining process control, resulting in improving the quality of the product, increasing productivity and thereby decreasing the overall manufacturing cost.