Yttrium partitioning and associations in coal-combustion ashes prior to and after their leaching in HCl

被引：16

作者：

Bartonova, Lucie ^{[1
,2
,3
]}

Serencisova, Jana ^{[1
,2
]}

Cech, Bohumir ^{[3
]}

机构：

[1] VSB Tech Univ Ostrava, Dept Chem, Fac Met & Mat Engn, Ostrava 70833, Czech Republic

[2] VSB Tech Univ Ostrava, Reg Mat Sci & Technol Ctr, Ostrava 70833, Czech Republic

[3] VSB Tech Univ Ostrava, ENET Ctr, Energy Units Utilizat Nontradit Energy Sources, Ostrava 70833, Czech Republic

来源：

FUEL PROCESSING TECHNOLOGY | 2018年 / 173卷

关键词：

Yttrium associations; Coal combustion; Ashes; HCl extraction; Fluidised bed; UNBURNED CARBON; TRACE-ELEMENTS; INNER-MONGOLIA; LIGNITE; GEOCHEMISTRY; MINERALS; QUALITY; DEPOSIT; BED;

D O I：

10.1016/j.fuproc.2018.01.011

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Yttrium associations and partitioning within fluidised-bed coal combustion ashes were studied in particle-size fractions prior to and after their leaching in cold dilute HCl. In original ash fractions (not leached in HCl), the dominant association of Y to P2O5 and TiO2 was revealed while after the leaching, the strength of relationship to P2O5 decreased considerably and TiO2 exhibited the only significant correlation. Overall HCl-extraction percentage of Y from these ashes was ca. 50% with TiO2-associated Y predominantly contributing to insoluble fraction. Yttrium percentage dissolved in HCl can be attributed to its affinity to soluble phosphates (e.g., fluor/hydroxy apatites) or its potential occurrence in the form of Y2O3 or YCl3.

引用

页码：205 / 215

页数：11

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