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

GOALI/IUCRP：用于高温冶金过程中熔体成分现场监测的固态电流传感器

• 批准号: 9424069
• 负责人: Uday Pal
• 金额: $ 25.66万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-15 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9424069&HistoricalAwards=false
• 关键词: GOALI; IUCRP; Solid; State; Amperiometric

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.

9424069 PAL将设计和构建固态传感器，以在原位监测氧化物（炉渣）熔体组合物中遇到的冶炼和精炼的熔体成分。 在该设备中，导致稳定氧化锆固体电解质的氧离子将在物理上分离出暴露于熔体的阴极隔室，与阳极室暴露于参考气体。 电极材料的可能选择包括难治性氧化物，例如腺体和Yttrium Chromites，掺杂的氧化锆和各种惰性金属扎基亚Cermets。 负电势扫描将相对于计数器电极（阳极）应用于传感电极（阴极）。 当达到熔体中氧化物的解离潜能时，氧化物将在阴极处减少，并将氧离子通过固体电解质驱动到阳极，在那里它们将释放电子，并检测到通过设备的离子电流。 如果要检测到的熔体中的氧化物具有不重叠且低于氧化锆的氧化物的分离势，那么这些氧化物可以通过该设备顺序解离和区分。 一旦氧化物分离，电势将导致离子电流峰，这将给出其浓度的量度。 通过使用单个设备，可以检测并测量铁，锰和铬的氧化物的浓度。 该传感器将在三个定义明确的炉渣系统：CAO-SIO2-AL2O3-FEO，CAO-SIO2-AL2O3-FEO-MNO和CAO-SIO2-A12O3-FEO-MNO-CROX上进行测试。 工业合作伙伴将包装此炉渣传感器进行钢结构设施中的现场测试。 在不锈钢制造矿渣中进行钢和钢罐中的FEO和MNO的适当实时检测是改善铁和合金元素的恢复，并通过更好的过程控制来改善非金属包裹体的关键。 为了最佳的过程控制亚铁和非有产性冶炼和精炼操作，在此过程中，需要在各个阶段实时监测炉渣中某些关键成分的浓度。 当前，这些过程中的所有炉渣组成分析均在从熔体中取出的样品上使用昂贵的分析设备进行，它们需要相对较长的时间。 如果可以使用相对廉价的传感器对炉渣组合物进行原位监视，则将广泛用于冶炼和精炼过程控制，从而提高了产品质量，从而提高了生产率，从而降低了整体制造成本。