Results of calculating the viscosity of acid slags according to the most well-known models used in steelmaking plants for slags with high basicity are analyzed. It is found that with an error of 10%, the calculations of viscosity according to the Urbain model coincide most fully with known data from the slag atlas in relation to acid slags typical for processing spent ceramic-based automotive catalysts. Within the composition of the active coating based on platinum group metals applied to ceramic unit of an automobile catalyst there is extensive use of lanthanide metals, their oxides, and salts that improve product quality characteristics. Cerium oxide is used advantageously, and an increase in concentration of this oxide is confirmed by chemical analysis of a ground mixture of spent automobile catalytic converters supplied for recycling. However, none of the models take account the effect of cerium oxide on melt viscosity. A requirement for taking this into account gives rise to the importance of the task in question. In order to determine this effect, charge composition was calculated to obtain viscosity of 2 poise typical for the technique employed, a charge was melted in a 1 MW DC arc furnace, and melt viscosity was determined by an inclined trough method. Melt temperatures were measured when the viscosity was the same as in the previous experiment. As a result of these studies the effect of cerium oxide concentration on temperature at which values of similar viscosity are achieved is determined. The value of the previously unknown coefficient of the effect of CeO2 on acid slag viscosity (equal to 2.24) is obtained, when it is considered as a network modifier in an Urbain model.

中文翻译：

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氧化铈对酸性渣粘度的影响

分析了根据炼钢厂用于高碱度炉渣的最著名模型计算酸性炉渣粘度的结果。发现根据 Urbain 模型计算的粘度有 10% 的误差，与来自炉渣图谱的已知数据完全一致，这些数据与处理废陶瓷基汽车催化剂的典型酸性炉渣有关。在应用于汽车催化剂陶瓷单元的基于铂族金属的活性涂层的组成中，广泛使用了镧系金属、它们的氧化物和盐，以提高产品质量特性。使用氧化铈是有利的，并且该氧化物浓度的增加通过对供回收利用的废汽车催化转化器的研磨混合物进行化学分析来证实。然而，没有一个模型考虑氧化铈对熔体粘度的影响。考虑到这一点的要求导致了相关任务的重要性。为了确定这种影响，计算炉料组成以获得所采用技术典型的2泊粘度，在1MW直流电弧炉中熔化炉料，并通过斜槽法测定熔体粘度。当粘度与之前的实验相同时测量熔体温度。作为这些研究的结果，确定了氧化铈浓度对达到相似粘度值时的温度的影响。当在 Urbain 模型中将其视为网络改性剂时，获得了先前未知的 CeO2 对酸性渣粘度影响系数的值（等于 2.24）。