Towards Redefining the Alumina Specifications Sheet — The Case of HF Emissions
Towards Redefining the Alumina Specifications Sheet — The Case of HF Emissions
复制标题
重新定义氧化铝规格表 — 高频排放案例
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
J. Metson
中科院分区：
文献类型：
--
作者：
Linus M. Perander;M. Stam;M. Hyland;J. Metson
对于熔炼应用，氧化铝质量通常根据化学和物理性质来定义，重点是杂质元素、表面积、水分含量、粒度分布和磨损指数。然而，这些性质不能预测真实的HF生成潜力，以及干式洗涤器中HF去除的真实的能力。使用工厂的测量和额外的实验室表征的氧化铝样品的数量扩大了氧化铝质量的规定是有道理的。残余三水铝石/勃姆石含量和孔径分布的测量，加上氧化铝微观结构的表征，可用于预测和了解进料和溶解过程中HF的产生以及在干式洗涤器中捕获HF的能力。
For smelting applications, alumina quality is typically defined in terms of chemical and physical properties, with emphasis on impurity elements, surface area, moisture content, particle size distribution and attrition index. However, these properties fail in prediction of the true HF generation potential, as well as the real capacity for HF removal in the dry scrubbers. Using plant measurements and additional laboratory characterization of a number of alumina samples a broadening of how alumina quality is specified is argued for. Measurements of the residual gibbsite/boehmite content and the pore size distribution, coupled with characterization of the alumina microstructure, can be used to predict and understand the generation of HF during feeding and dissolution as well as the ability to capture HF in the dry scrubbers.